| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `/root/.cargo/registry/src/github.com-1ecc6299db9ec823/nix-0.26.2/src/unistd.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>unistd.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../normalize.css"><link rel="stylesheet" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../ayu.css" disabled><link rel="stylesheet" href="../../dark.css" disabled><link rel="stylesheet" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script defer src="../../source-script.js"></script><script defer src="../../source-files.js"></script><script defer src="../../main.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../nix/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../nix/index.html"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| <span id="3383">3383</span> |
| </pre><pre class="rust"><code><span class="doccomment">//! Safe wrappers around functions found in libc "unistd.h" header |
| |
| </span><span class="kw">use </span><span class="kw">crate</span>::errno::{<span class="self">self</span>, Errno}; |
| <span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| #[cfg(feature = <span class="string">"fs"</span>)] |
| </span><span class="kw">use </span><span class="kw">crate</span>::fcntl::{at_rawfd, AtFlags}; |
| <span class="attribute">#[cfg(feature = <span class="string">"fs"</span>)] |
| </span><span class="kw">use </span><span class="kw">crate</span>::fcntl::{fcntl, FcntlArg::F_SETFD, FdFlag, OFlag}; |
| <span class="attribute">#[cfg(all( |
| feature = <span class="string">"fs"</span>, |
| any( |
| target_os = <span class="string">"openbsd"</span>, |
| target_os = <span class="string">"netbsd"</span>, |
| target_os = <span class="string">"freebsd"</span>, |
| target_os = <span class="string">"dragonfly"</span>, |
| target_os = <span class="string">"macos"</span>, |
| target_os = <span class="string">"ios" |
| </span>) |
| ))] |
| </span><span class="kw">use </span><span class="kw">crate</span>::sys::stat::FileFlag; |
| <span class="attribute">#[cfg(feature = <span class="string">"fs"</span>)] |
| </span><span class="kw">use </span><span class="kw">crate</span>::sys::stat::Mode; |
| <span class="kw">use crate</span>::{Error, NixPath, <span class="prelude-ty">Result</span>}; |
| <span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| </span><span class="kw">use </span>cfg_if::cfg_if; |
| <span class="kw">use </span>libc::{ |
| <span class="self">self</span>, c_char, c_int, c_long, c_uint, c_void, gid_t, mode_t, off_t, pid_t, |
| size_t, uid_t, PATH_MAX, |
| }; |
| <span class="kw">use </span>std::convert::Infallible; |
| <span class="kw">use </span>std::ffi::{CStr, OsString}; |
| <span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| </span><span class="kw">use </span>std::ffi::{CString, OsStr}; |
| <span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| </span><span class="kw">use </span>std::os::unix::ffi::OsStrExt; |
| <span class="kw">use </span>std::os::unix::ffi::OsStringExt; |
| <span class="kw">use </span>std::os::unix::io::RawFd; |
| <span class="kw">use </span>std::path::PathBuf; |
| <span class="kw">use </span>std::{fmt, mem, ptr}; |
| |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![feature = <span class="string">"fs"</span>] |
| #[cfg(any(target_os = <span class="string">"android"</span>, target_os = <span class="string">"linux"</span>))] |
| </span><span class="kw">pub use </span><span class="self">self</span>::pivot_root::<span class="kw-2">*</span>; |
| } |
| |
| <span class="attribute">#[cfg(any( |
| target_os = <span class="string">"android"</span>, |
| target_os = <span class="string">"dragonfly"</span>, |
| target_os = <span class="string">"freebsd"</span>, |
| target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"openbsd" |
| </span>))] |
| </span><span class="kw">pub use </span><span class="self">self</span>::setres::<span class="kw-2">*</span>; |
| |
| <span class="attribute">#[cfg(any( |
| target_os = <span class="string">"android"</span>, |
| target_os = <span class="string">"dragonfly"</span>, |
| target_os = <span class="string">"freebsd"</span>, |
| target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"openbsd" |
| </span>))] |
| </span><span class="kw">pub use </span><span class="self">self</span>::getres::<span class="kw-2">*</span>; |
| |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![feature = <span class="string">"user"</span>] |
| |
| </span><span class="doccomment">/// User identifier |
| /// |
| /// Newtype pattern around `uid_t` (which is just alias). It prevents bugs caused by accidentally |
| /// passing wrong value. |
| </span><span class="attribute">#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)] |
| </span><span class="kw">pub struct </span>Uid(uid_t); |
| |
| <span class="kw">impl </span>Uid { |
| <span class="doccomment">/// Creates `Uid` from raw `uid_t`. |
| </span><span class="kw">pub const fn </span>from_raw(uid: uid_t) -> <span class="self">Self </span>{ |
| Uid(uid) |
| } |
| |
| <span class="doccomment">/// Returns Uid of calling process. This is practically a more Rusty alias for `getuid`. |
| </span><span class="attribute">#[doc(alias(<span class="string">"getuid"</span>))] |
| </span><span class="kw">pub fn </span>current() -> <span class="self">Self </span>{ |
| getuid() |
| } |
| |
| <span class="doccomment">/// Returns effective Uid of calling process. This is practically a more Rusty alias for `geteuid`. |
| </span><span class="attribute">#[doc(alias(<span class="string">"geteuid"</span>))] |
| </span><span class="kw">pub fn </span>effective() -> <span class="self">Self </span>{ |
| geteuid() |
| } |
| |
| <span class="doccomment">/// Returns true if the `Uid` represents privileged user - root. (If it equals zero.) |
| </span><span class="kw">pub const fn </span>is_root(<span class="self">self</span>) -> bool { |
| <span class="self">self</span>.<span class="number">0 </span>== ROOT.<span class="number">0 |
| </span>} |
| |
| <span class="doccomment">/// Get the raw `uid_t` wrapped by `self`. |
| </span><span class="kw">pub const fn </span>as_raw(<span class="self">self</span>) -> uid_t { |
| <span class="self">self</span>.<span class="number">0 |
| </span>} |
| } |
| |
| <span class="kw">impl </span>From<Uid> <span class="kw">for </span>uid_t { |
| <span class="kw">fn </span>from(uid: Uid) -> <span class="self">Self </span>{ |
| uid.<span class="number">0 |
| </span>} |
| } |
| |
| <span class="kw">impl </span>From<uid_t> <span class="kw">for </span>Uid { |
| <span class="kw">fn </span>from(uid: uid_t) -> <span class="self">Self </span>{ |
| Uid(uid) |
| } |
| } |
| |
| <span class="kw">impl </span>fmt::Display <span class="kw">for </span>Uid { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result { |
| fmt::Display::fmt(<span class="kw-2">&</span><span class="self">self</span>.<span class="number">0</span>, f) |
| } |
| } |
| |
| <span class="doccomment">/// Constant for UID = 0 |
| </span><span class="kw">pub const </span>ROOT: Uid = Uid(<span class="number">0</span>); |
| |
| <span class="doccomment">/// Group identifier |
| /// |
| /// Newtype pattern around `gid_t` (which is just alias). It prevents bugs caused by accidentally |
| /// passing wrong value. |
| </span><span class="attribute">#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)] |
| </span><span class="kw">pub struct </span>Gid(gid_t); |
| |
| <span class="kw">impl </span>Gid { |
| <span class="doccomment">/// Creates `Gid` from raw `gid_t`. |
| </span><span class="kw">pub const fn </span>from_raw(gid: gid_t) -> <span class="self">Self </span>{ |
| Gid(gid) |
| } |
| |
| <span class="doccomment">/// Returns Gid of calling process. This is practically a more Rusty alias for `getgid`. |
| </span><span class="attribute">#[doc(alias(<span class="string">"getgid"</span>))] |
| </span><span class="kw">pub fn </span>current() -> <span class="self">Self </span>{ |
| getgid() |
| } |
| |
| <span class="doccomment">/// Returns effective Gid of calling process. This is practically a more Rusty alias for `getegid`. |
| </span><span class="attribute">#[doc(alias(<span class="string">"getegid"</span>))] |
| </span><span class="kw">pub fn </span>effective() -> <span class="self">Self </span>{ |
| getegid() |
| } |
| |
| <span class="doccomment">/// Get the raw `gid_t` wrapped by `self`. |
| </span><span class="kw">pub const fn </span>as_raw(<span class="self">self</span>) -> gid_t { |
| <span class="self">self</span>.<span class="number">0 |
| </span>} |
| } |
| |
| <span class="kw">impl </span>From<Gid> <span class="kw">for </span>gid_t { |
| <span class="kw">fn </span>from(gid: Gid) -> <span class="self">Self </span>{ |
| gid.<span class="number">0 |
| </span>} |
| } |
| |
| <span class="kw">impl </span>From<gid_t> <span class="kw">for </span>Gid { |
| <span class="kw">fn </span>from(gid: gid_t) -> <span class="self">Self </span>{ |
| Gid(gid) |
| } |
| } |
| |
| <span class="kw">impl </span>fmt::Display <span class="kw">for </span>Gid { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result { |
| fmt::Display::fmt(<span class="kw-2">&</span><span class="self">self</span>.<span class="number">0</span>, f) |
| } |
| } |
| } |
| |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![feature = <span class="string">"process"</span>] |
| </span><span class="doccomment">/// Process identifier |
| /// |
| /// Newtype pattern around `pid_t` (which is just alias). It prevents bugs caused by accidentally |
| /// passing wrong value. |
| </span><span class="attribute">#[derive(Debug, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)] |
| </span><span class="kw">pub struct </span>Pid(pid_t); |
| |
| <span class="kw">impl </span>Pid { |
| <span class="doccomment">/// Creates `Pid` from raw `pid_t`. |
| </span><span class="kw">pub const fn </span>from_raw(pid: pid_t) -> <span class="self">Self </span>{ |
| Pid(pid) |
| } |
| |
| <span class="doccomment">/// Returns PID of calling process |
| </span><span class="attribute">#[doc(alias(<span class="string">"getpid"</span>))] |
| </span><span class="kw">pub fn </span>this() -> <span class="self">Self </span>{ |
| getpid() |
| } |
| |
| <span class="doccomment">/// Returns PID of parent of calling process |
| </span><span class="attribute">#[doc(alias(<span class="string">"getppid"</span>))] |
| </span><span class="kw">pub fn </span>parent() -> <span class="self">Self </span>{ |
| getppid() |
| } |
| |
| <span class="doccomment">/// Get the raw `pid_t` wrapped by `self`. |
| </span><span class="kw">pub const fn </span>as_raw(<span class="self">self</span>) -> pid_t { |
| <span class="self">self</span>.<span class="number">0 |
| </span>} |
| } |
| |
| <span class="kw">impl </span>From<Pid> <span class="kw">for </span>pid_t { |
| <span class="kw">fn </span>from(pid: Pid) -> <span class="self">Self </span>{ |
| pid.<span class="number">0 |
| </span>} |
| } |
| |
| <span class="kw">impl </span>fmt::Display <span class="kw">for </span>Pid { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result { |
| fmt::Display::fmt(<span class="kw-2">&</span><span class="self">self</span>.<span class="number">0</span>, f) |
| } |
| } |
| |
| |
| <span class="doccomment">/// Represents the successful result of calling `fork` |
| /// |
| /// When `fork` is called, the process continues execution in the parent process |
| /// and in the new child. This return type can be examined to determine whether |
| /// you are now executing in the parent process or in the child. |
| </span><span class="attribute">#[derive(Clone, Copy, Debug)] |
| </span><span class="kw">pub enum </span>ForkResult { |
| Parent { child: Pid }, |
| Child, |
| } |
| |
| <span class="kw">impl </span>ForkResult { |
| |
| <span class="doccomment">/// Return `true` if this is the child process of the `fork()` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>is_child(<span class="self">self</span>) -> bool { |
| <span class="macro">matches!</span>(<span class="self">self</span>, ForkResult::Child) |
| } |
| |
| <span class="doccomment">/// Returns `true` if this is the parent process of the `fork()` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>is_parent(<span class="self">self</span>) -> bool { |
| !<span class="self">self</span>.is_child() |
| } |
| } |
| |
| <span class="doccomment">/// Create a new child process duplicating the parent process ([see |
| /// fork(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/fork.html)). |
| /// |
| /// After successfully calling the fork system call, a second process will |
| /// be created which is identical to the original except for the pid and the |
| /// return value of this function. As an example: |
| /// |
| /// ``` |
| /// use nix::{sys::wait::waitpid,unistd::{fork, ForkResult, write}}; |
| /// |
| /// match unsafe{fork()} { |
| /// Ok(ForkResult::Parent { child, .. }) => { |
| /// println!("Continuing execution in parent process, new child has pid: {}", child); |
| /// waitpid(child, None).unwrap(); |
| /// } |
| /// Ok(ForkResult::Child) => { |
| /// // Unsafe to use `println!` (or `unwrap`) here. See Safety. |
| /// write(libc::STDOUT_FILENO, "I'm a new child process\n".as_bytes()).ok(); |
| /// unsafe { libc::_exit(0) }; |
| /// } |
| /// Err(_) => println!("Fork failed"), |
| /// } |
| /// ``` |
| /// |
| /// This will print something like the following (order nondeterministic). The |
| /// thing to note is that you end up with two processes continuing execution |
| /// immediately after the fork call but with different match arms. |
| /// |
| /// ```text |
| /// Continuing execution in parent process, new child has pid: 1234 |
| /// I'm a new child process |
| /// ``` |
| /// |
| /// # Safety |
| /// |
| /// In a multithreaded program, only [async-signal-safe] functions like `pause` |
| /// and `_exit` may be called by the child (the parent isn't restricted). Note |
| /// that memory allocation may **not** be async-signal-safe and thus must be |
| /// prevented. |
| /// |
| /// Those functions are only a small subset of your operating system's API, so |
| /// special care must be taken to only invoke code you can control and audit. |
| /// |
| /// [async-signal-safe]: https://man7.org/linux/man-pages/man7/signal-safety.7.html |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub unsafe fn </span>fork() -> <span class="prelude-ty">Result</span><ForkResult> { |
| <span class="kw">use </span><span class="self">self</span>::ForkResult::<span class="kw-2">*</span>; |
| <span class="kw">let </span>res = libc::fork(); |
| |
| Errno::result(res).map(|res| <span class="kw">match </span>res { |
| <span class="number">0 </span>=> Child, |
| res => Parent { child: Pid(res) }, |
| }) |
| } |
| |
| <span class="doccomment">/// Get the pid of this process (see |
| /// [getpid(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/getpid.html)). |
| /// |
| /// Since you are running code, there is always a pid to return, so there |
| /// is no error case that needs to be handled. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>getpid() -> Pid { |
| Pid(<span class="kw">unsafe </span>{ libc::getpid() }) |
| } |
| |
| <span class="doccomment">/// Get the pid of this processes' parent (see |
| /// [getpid(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/getppid.html)). |
| /// |
| /// There is always a parent pid to return, so there is no error case that needs |
| /// to be handled. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>getppid() -> Pid { |
| Pid(<span class="kw">unsafe </span>{ libc::getppid() }) <span class="comment">// no error handling, according to man page: "These functions are always successful." |
| </span>} |
| |
| <span class="doccomment">/// Set a process group ID (see |
| /// [setpgid(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/setpgid.html)). |
| /// |
| /// Set the process group id (PGID) of a particular process. If a pid of zero |
| /// is specified, then the pid of the calling process is used. Process groups |
| /// may be used to group together a set of processes in order for the OS to |
| /// apply some operations across the group. |
| /// |
| /// `setsid()` may be used to create a new process group. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>setpgid(pid: Pid, pgid: Pid) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::setpgid(pid.into(), pgid.into()) }; |
| Errno::result(res).map(drop) |
| } |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>getpgid(pid: <span class="prelude-ty">Option</span><Pid>) -> <span class="prelude-ty">Result</span><Pid> { |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::getpgid(pid.unwrap_or(Pid(<span class="number">0</span>)).into()) }; |
| Errno::result(res).map(Pid) |
| } |
| |
| <span class="doccomment">/// Create new session and set process group id (see |
| /// [setsid(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/setsid.html)). |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>setsid() -> <span class="prelude-ty">Result</span><Pid> { |
| Errno::result(<span class="kw">unsafe </span>{ libc::setsid() }).map(Pid) |
| } |
| |
| <span class="doccomment">/// Get the process group ID of a session leader |
| /// [getsid(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/getsid.html). |
| /// |
| /// Obtain the process group ID of the process that is the session leader of the process specified |
| /// by pid. If pid is zero, it specifies the calling process. |
| </span><span class="attribute">#[inline] |
| #[cfg(not(target_os = <span class="string">"redox"</span>))] |
| </span><span class="kw">pub fn </span>getsid(pid: <span class="prelude-ty">Option</span><Pid>) -> <span class="prelude-ty">Result</span><Pid> { |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::getsid(pid.unwrap_or(Pid(<span class="number">0</span>)).into()) }; |
| Errno::result(res).map(Pid) |
| } |
| } |
| |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![all(feature = <span class="string">"process"</span>, feature = <span class="string">"term"</span>)] |
| </span><span class="doccomment">/// Get the terminal foreground process group (see |
| /// [tcgetpgrp(3)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/tcgetpgrp.html)). |
| /// |
| /// Get the group process id (GPID) of the foreground process group on the |
| /// terminal associated to file descriptor (FD). |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>tcgetpgrp(fd: c_int) -> <span class="prelude-ty">Result</span><Pid> { |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::tcgetpgrp(fd) }; |
| Errno::result(res).map(Pid) |
| } |
| <span class="doccomment">/// Set the terminal foreground process group (see |
| /// [tcgetpgrp(3)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/tcsetpgrp.html)). |
| /// |
| /// Get the group process id (PGID) to the foreground process group on the |
| /// terminal associated to file descriptor (FD). |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>tcsetpgrp(fd: c_int, pgrp: Pid) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::tcsetpgrp(fd, pgrp.into()) }; |
| Errno::result(res).map(drop) |
| } |
| } |
| |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![feature = <span class="string">"process"</span>] |
| </span><span class="doccomment">/// Get the group id of the calling process (see |
| ///[getpgrp(3)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/getpgrp.html)). |
| /// |
| /// Get the process group id (PGID) of the calling process. |
| /// According to the man page it is always successful. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>getpgrp() -> Pid { |
| Pid(<span class="kw">unsafe </span>{ libc::getpgrp() }) |
| } |
| |
| <span class="doccomment">/// Get the caller's thread ID (see |
| /// [gettid(2)](https://man7.org/linux/man-pages/man2/gettid.2.html). |
| /// |
| /// This function is only available on Linux based systems. In a single |
| /// threaded process, the main thread will have the same ID as the process. In |
| /// a multithreaded process, each thread will have a unique thread id but the |
| /// same process ID. |
| /// |
| /// No error handling is required as a thread id should always exist for any |
| /// process, even if threads are not being used. |
| </span><span class="attribute">#[cfg(any(target_os = <span class="string">"linux"</span>, target_os = <span class="string">"android"</span>))] |
| #[inline] |
| </span><span class="kw">pub fn </span>gettid() -> Pid { |
| Pid(<span class="kw">unsafe </span>{ libc::syscall(libc::SYS_gettid) <span class="kw">as </span>pid_t }) |
| } |
| } |
| |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![feature = <span class="string">"fs"</span>] |
| </span><span class="doccomment">/// Create a copy of the specified file descriptor (see |
| /// [dup(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/dup.html)). |
| /// |
| /// The new file descriptor will have a new index but refer to the same |
| /// resource as the old file descriptor and the old and new file descriptors may |
| /// be used interchangeably. The new and old file descriptor share the same |
| /// underlying resource, offset, and file status flags. The actual index used |
| /// for the file descriptor will be the lowest fd index that is available. |
| /// |
| /// The two file descriptors do not share file descriptor flags (e.g. `OFlag::FD_CLOEXEC`). |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>dup(oldfd: RawFd) -> <span class="prelude-ty">Result</span><RawFd> { |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::dup(oldfd) }; |
| |
| Errno::result(res) |
| } |
| |
| <span class="doccomment">/// Create a copy of the specified file descriptor using the specified fd (see |
| /// [dup(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/dup.html)). |
| /// |
| /// This function behaves similar to `dup()` except that it will try to use the |
| /// specified fd instead of allocating a new one. See the man pages for more |
| /// detail on the exact behavior of this function. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>dup2(oldfd: RawFd, newfd: RawFd) -> <span class="prelude-ty">Result</span><RawFd> { |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::dup2(oldfd, newfd) }; |
| |
| Errno::result(res) |
| } |
| |
| <span class="doccomment">/// Create a new copy of the specified file descriptor using the specified fd |
| /// and flags (see [dup(2)](https://man7.org/linux/man-pages/man2/dup.2.html)). |
| /// |
| /// This function behaves similar to `dup2()` but allows for flags to be |
| /// specified. |
| </span><span class="kw">pub fn </span>dup3(oldfd: RawFd, newfd: RawFd, flags: OFlag) -> <span class="prelude-ty">Result</span><RawFd> { |
| dup3_polyfill(oldfd, newfd, flags) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>dup3_polyfill(oldfd: RawFd, newfd: RawFd, flags: OFlag) -> <span class="prelude-ty">Result</span><RawFd> { |
| <span class="kw">if </span>oldfd == newfd { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(Errno::EINVAL); |
| } |
| |
| <span class="kw">let </span>fd = dup2(oldfd, newfd)<span class="question-mark">?</span>; |
| |
| <span class="kw">if </span>flags.contains(OFlag::O_CLOEXEC) { |
| <span class="kw">if let </span><span class="prelude-val">Err</span>(e) = fcntl(fd, F_SETFD(FdFlag::FD_CLOEXEC)) { |
| <span class="kw">let _ </span>= close(fd); |
| <span class="kw">return </span><span class="prelude-val">Err</span>(e); |
| } |
| } |
| |
| <span class="prelude-val">Ok</span>(fd) |
| } |
| |
| <span class="doccomment">/// Change the current working directory of the calling process (see |
| /// [chdir(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/chdir.html)). |
| /// |
| /// This function may fail in a number of different scenarios. See the man |
| /// pages for additional details on possible failure cases. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>chdir<P: <span class="question-mark">?</span>Sized + NixPath>(path: <span class="kw-2">&</span>P) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = path.with_nix_path(|cstr| { |
| <span class="kw">unsafe </span>{ libc::chdir(cstr.as_ptr()) } |
| })<span class="question-mark">?</span>; |
| |
| Errno::result(res).map(drop) |
| } |
| |
| <span class="doccomment">/// Change the current working directory of the process to the one |
| /// given as an open file descriptor (see |
| /// [fchdir(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/fchdir.html)). |
| /// |
| /// This function may fail in a number of different scenarios. See the man |
| /// pages for additional details on possible failure cases. |
| </span><span class="attribute">#[inline] |
| #[cfg(not(target_os = <span class="string">"fuchsia"</span>))] |
| </span><span class="kw">pub fn </span>fchdir(dirfd: RawFd) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::fchdir(dirfd) }; |
| |
| Errno::result(res).map(drop) |
| } |
| |
| <span class="doccomment">/// Creates new directory `path` with access rights `mode`. (see [mkdir(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/mkdir.html)) |
| /// |
| /// # Errors |
| /// |
| /// There are several situations where mkdir might fail: |
| /// |
| /// - current user has insufficient rights in the parent directory |
| /// - the path already exists |
| /// - the path name is too long (longer than `PATH_MAX`, usually 4096 on linux, 1024 on OS X) |
| /// |
| /// # Example |
| /// |
| /// ```rust |
| /// use nix::unistd; |
| /// use nix::sys::stat; |
| /// use tempfile::tempdir; |
| /// |
| /// let tmp_dir1 = tempdir().unwrap(); |
| /// let tmp_dir2 = tmp_dir1.path().join("new_dir"); |
| /// |
| /// // create new directory and give read, write and execute rights to the owner |
| /// match unistd::mkdir(&tmp_dir2, stat::Mode::S_IRWXU) { |
| /// Ok(_) => println!("created {:?}", tmp_dir2), |
| /// Err(err) => println!("Error creating directory: {}", err), |
| /// } |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>mkdir<P: <span class="question-mark">?</span>Sized + NixPath>(path: <span class="kw-2">&</span>P, mode: Mode) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = path.with_nix_path(|cstr| { |
| <span class="kw">unsafe </span>{ libc::mkdir(cstr.as_ptr(), mode.bits() <span class="kw">as </span>mode_t) } |
| })<span class="question-mark">?</span>; |
| |
| Errno::result(res).map(drop) |
| } |
| |
| <span class="doccomment">/// Creates new fifo special file (named pipe) with path `path` and access rights `mode`. |
| /// |
| /// # Errors |
| /// |
| /// There are several situations where mkfifo might fail: |
| /// |
| /// - current user has insufficient rights in the parent directory |
| /// - the path already exists |
| /// - the path name is too long (longer than `PATH_MAX`, usually 4096 on linux, 1024 on OS X) |
| /// |
| /// For a full list consult |
| /// [posix specification](https://pubs.opengroup.org/onlinepubs/9699919799/functions/mkfifo.html) |
| /// |
| /// # Example |
| /// |
| /// ```rust |
| /// use nix::unistd; |
| /// use nix::sys::stat; |
| /// use tempfile::tempdir; |
| /// |
| /// let tmp_dir = tempdir().unwrap(); |
| /// let fifo_path = tmp_dir.path().join("foo.pipe"); |
| /// |
| /// // create new fifo and give read, write and execute rights to the owner |
| /// match unistd::mkfifo(&fifo_path, stat::Mode::S_IRWXU) { |
| /// Ok(_) => println!("created {:?}", fifo_path), |
| /// Err(err) => println!("Error creating fifo: {}", err), |
| /// } |
| /// ``` |
| </span><span class="attribute">#[inline] |
| #[cfg(not(target_os = <span class="string">"redox"</span>))] </span><span class="comment">// RedoxFS does not support fifo yet |
| </span><span class="kw">pub fn </span>mkfifo<P: <span class="question-mark">?</span>Sized + NixPath>(path: <span class="kw-2">&</span>P, mode: Mode) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = path.with_nix_path(|cstr| { |
| <span class="kw">unsafe </span>{ libc::mkfifo(cstr.as_ptr(), mode.bits() <span class="kw">as </span>mode_t) } |
| })<span class="question-mark">?</span>; |
| |
| Errno::result(res).map(drop) |
| } |
| |
| <span class="doccomment">/// Creates new fifo special file (named pipe) with path `path` and access rights `mode`. |
| /// |
| /// If `dirfd` has a value, then `path` is relative to directory associated with the file descriptor. |
| /// |
| /// If `dirfd` is `None`, then `path` is relative to the current working directory. |
| /// |
| /// # References |
| /// |
| /// [mkfifoat(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/mkfifoat.html). |
| </span><span class="comment">// mkfifoat is not implemented in OSX or android |
| </span><span class="attribute">#[inline] |
| #[cfg(not(any( |
| target_os = <span class="string">"macos"</span>, target_os = <span class="string">"ios"</span>, target_os = <span class="string">"haiku"</span>, |
| target_os = <span class="string">"android"</span>, target_os = <span class="string">"redox"</span>)))] |
| </span><span class="kw">pub fn </span>mkfifoat<P: <span class="question-mark">?</span>Sized + NixPath>(dirfd: <span class="prelude-ty">Option</span><RawFd>, path: <span class="kw-2">&</span>P, mode: Mode) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = path.with_nix_path(|cstr| <span class="kw">unsafe </span>{ |
| libc::mkfifoat(at_rawfd(dirfd), cstr.as_ptr(), mode.bits() <span class="kw">as </span>mode_t) |
| })<span class="question-mark">?</span>; |
| |
| Errno::result(res).map(drop) |
| } |
| |
| <span class="doccomment">/// Creates a symbolic link at `path2` which points to `path1`. |
| /// |
| /// If `dirfd` has a value, then `path2` is relative to directory associated |
| /// with the file descriptor. |
| /// |
| /// If `dirfd` is `None`, then `path2` is relative to the current working |
| /// directory. This is identical to `libc::symlink(path1, path2)`. |
| /// |
| /// See also [symlinkat(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/symlinkat.html). |
| </span><span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| </span><span class="kw">pub fn </span>symlinkat<P1: <span class="question-mark">?</span>Sized + NixPath, P2: <span class="question-mark">?</span>Sized + NixPath>( |
| path1: <span class="kw-2">&</span>P1, |
| dirfd: <span class="prelude-ty">Option</span><RawFd>, |
| path2: <span class="kw-2">&</span>P2) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = |
| path1.with_nix_path(|path1| { |
| path2.with_nix_path(|path2| { |
| <span class="kw">unsafe </span>{ |
| libc::symlinkat( |
| path1.as_ptr(), |
| dirfd.unwrap_or(libc::AT_FDCWD), |
| path2.as_ptr() |
| ) |
| } |
| }) |
| })<span class="question-mark">??</span>; |
| Errno::result(res).map(drop) |
| } |
| } |
| |
| <span class="comment">// Double the buffer capacity up to limit. In case it already has |
| // reached the limit, return Errno::ERANGE. |
| </span><span class="attribute">#[cfg(any(feature = <span class="string">"fs"</span>, feature = <span class="string">"user"</span>))] |
| </span><span class="kw">fn </span>reserve_double_buffer_size<T>(buf: <span class="kw-2">&mut </span>Vec<T>, limit: usize) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">use </span>std::cmp::min; |
| |
| <span class="kw">if </span>buf.capacity() >= limit { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(Errno::ERANGE); |
| } |
| |
| <span class="kw">let </span>capacity = min(buf.capacity() * <span class="number">2</span>, limit); |
| buf.reserve(capacity); |
| |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![feature = <span class="string">"fs"</span>] |
| |
| </span><span class="doccomment">/// Returns the current directory as a `PathBuf` |
| /// |
| /// Err is returned if the current user doesn't have the permission to read or search a component |
| /// of the current path. |
| /// |
| /// # Example |
| /// |
| /// ```rust |
| /// use nix::unistd; |
| /// |
| /// // assume that we are allowed to get current directory |
| /// let dir = unistd::getcwd().unwrap(); |
| /// println!("The current directory is {:?}", dir); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>getcwd() -> <span class="prelude-ty">Result</span><PathBuf> { |
| <span class="kw">let </span><span class="kw-2">mut </span>buf = Vec::with_capacity(<span class="number">512</span>); |
| <span class="kw">loop </span>{ |
| <span class="kw">unsafe </span>{ |
| <span class="kw">let </span>ptr = buf.as_mut_ptr() <span class="kw">as </span><span class="kw-2">*mut </span>c_char; |
| |
| <span class="comment">// The buffer must be large enough to store the absolute pathname plus |
| // a terminating null byte, or else null is returned. |
| // To safely handle this we start with a reasonable size (512 bytes) |
| // and double the buffer size upon every error |
| </span><span class="kw">if </span>!libc::getcwd(ptr, buf.capacity()).is_null() { |
| <span class="kw">let </span>len = CStr::from_ptr(buf.as_ptr() <span class="kw">as </span><span class="kw-2">*const </span>c_char).to_bytes().len(); |
| buf.set_len(len); |
| buf.shrink_to_fit(); |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(PathBuf::from(OsString::from_vec(buf))); |
| } <span class="kw">else </span>{ |
| <span class="kw">let </span>error = Errno::last(); |
| <span class="comment">// ERANGE means buffer was too small to store directory name |
| </span><span class="kw">if </span>error != Errno::ERANGE { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(error); |
| } |
| } |
| |
| <span class="comment">// Trigger the internal buffer resizing logic. |
| </span>reserve_double_buffer_size(<span class="kw-2">&mut </span>buf, PATH_MAX <span class="kw">as </span>usize)<span class="question-mark">?</span>; |
| } |
| } |
| } |
| } |
| |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![all(feature = <span class="string">"user"</span>, feature = <span class="string">"fs"</span>)] |
| |
| </span><span class="doccomment">/// Computes the raw UID and GID values to pass to a `*chown` call. |
| </span><span class="comment">// The cast is not unnecessary on all platforms. |
| </span><span class="attribute">#[allow(clippy::unnecessary_cast)] |
| </span><span class="kw">fn </span>chown_raw_ids(owner: <span class="prelude-ty">Option</span><Uid>, group: <span class="prelude-ty">Option</span><Gid>) -> (libc::uid_t, libc::gid_t) { |
| <span class="comment">// According to the POSIX specification, -1 is used to indicate that owner and group |
| // are not to be changed. Since uid_t and gid_t are unsigned types, we have to wrap |
| // around to get -1. |
| </span><span class="kw">let </span>uid = owner.map(Into::into) |
| .unwrap_or_else(|| (<span class="number">0 </span><span class="kw">as </span>uid_t).wrapping_sub(<span class="number">1</span>)); |
| <span class="kw">let </span>gid = group.map(Into::into) |
| .unwrap_or_else(|| (<span class="number">0 </span><span class="kw">as </span>gid_t).wrapping_sub(<span class="number">1</span>)); |
| (uid, gid) |
| } |
| |
| <span class="doccomment">/// Change the ownership of the file at `path` to be owned by the specified |
| /// `owner` (user) and `group` (see |
| /// [chown(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/chown.html)). |
| /// |
| /// The owner/group for the provided path name will not be modified if `None` is |
| /// provided for that argument. Ownership change will be attempted for the path |
| /// only if `Some` owner/group is provided. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>chown<P: <span class="question-mark">?</span>Sized + NixPath>(path: <span class="kw-2">&</span>P, owner: <span class="prelude-ty">Option</span><Uid>, group: <span class="prelude-ty">Option</span><Gid>) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = path.with_nix_path(|cstr| { |
| <span class="kw">let </span>(uid, gid) = chown_raw_ids(owner, group); |
| <span class="kw">unsafe </span>{ libc::chown(cstr.as_ptr(), uid, gid) } |
| })<span class="question-mark">?</span>; |
| |
| Errno::result(res).map(drop) |
| } |
| |
| <span class="doccomment">/// Change the ownership of the file referred to by the open file descriptor `fd` to be owned by |
| /// the specified `owner` (user) and `group` (see |
| /// [fchown(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/fchown.html)). |
| /// |
| /// The owner/group for the provided file will not be modified if `None` is |
| /// provided for that argument. Ownership change will be attempted for the path |
| /// only if `Some` owner/group is provided. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>fchown(fd: RawFd, owner: <span class="prelude-ty">Option</span><Uid>, group: <span class="prelude-ty">Option</span><Gid>) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>(uid, gid) = chown_raw_ids(owner, group); |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::fchown(fd, uid, gid) }; |
| Errno::result(res).map(drop) |
| } |
| |
| <span class="doccomment">/// Flags for `fchownat` function. |
| </span><span class="attribute">#[derive(Clone, Copy, Debug)] |
| </span><span class="kw">pub enum </span>FchownatFlags { |
| FollowSymlink, |
| NoFollowSymlink, |
| } |
| |
| <span class="doccomment">/// Change the ownership of the file at `path` to be owned by the specified |
| /// `owner` (user) and `group`. |
| /// |
| /// The owner/group for the provided path name will not be modified if `None` is |
| /// provided for that argument. Ownership change will be attempted for the path |
| /// only if `Some` owner/group is provided. |
| /// |
| /// The file to be changed is determined relative to the directory associated |
| /// with the file descriptor `dirfd` or the current working directory |
| /// if `dirfd` is `None`. |
| /// |
| /// If `flag` is `FchownatFlags::NoFollowSymlink` and `path` names a symbolic link, |
| /// then the mode of the symbolic link is changed. |
| /// |
| /// `fchownat(None, path, owner, group, FchownatFlags::NoFollowSymlink)` is identical to |
| /// a call `libc::lchown(path, owner, group)`. That's why `lchown` is unimplemented in |
| /// the `nix` crate. |
| /// |
| /// # References |
| /// |
| /// [fchownat(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/fchownat.html). |
| </span><span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| </span><span class="kw">pub fn </span>fchownat<P: <span class="question-mark">?</span>Sized + NixPath>( |
| dirfd: <span class="prelude-ty">Option</span><RawFd>, |
| path: <span class="kw-2">&</span>P, |
| owner: <span class="prelude-ty">Option</span><Uid>, |
| group: <span class="prelude-ty">Option</span><Gid>, |
| flag: FchownatFlags, |
| ) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>atflag = |
| <span class="kw">match </span>flag { |
| FchownatFlags::FollowSymlink => AtFlags::empty(), |
| FchownatFlags::NoFollowSymlink => AtFlags::AT_SYMLINK_NOFOLLOW, |
| }; |
| <span class="kw">let </span>res = path.with_nix_path(|cstr| <span class="kw">unsafe </span>{ |
| <span class="kw">let </span>(uid, gid) = chown_raw_ids(owner, group); |
| libc::fchownat(at_rawfd(dirfd), cstr.as_ptr(), uid, gid, |
| atflag.bits() <span class="kw">as </span>libc::c_int) |
| })<span class="question-mark">?</span>; |
| |
| Errno::result(res).map(drop) |
| } |
| } |
| |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![feature = <span class="string">"process"</span>] |
| </span><span class="kw">fn </span>to_exec_array<S: AsRef<CStr>>(args: <span class="kw-2">&</span>[S]) -> Vec<<span class="kw-2">*const </span>c_char> { |
| <span class="kw">use </span>std::iter::once; |
| args.iter() |
| .map(|s| s.as_ref().as_ptr()) |
| .chain(once(ptr::null())) |
| .collect() |
| } |
| |
| <span class="doccomment">/// Replace the current process image with a new one (see |
| /// [exec(3)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/exec.html)). |
| /// |
| /// See the `::nix::unistd::execve` system call for additional details. `execv` |
| /// performs the same action but does not allow for customization of the |
| /// environment for the new process. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>execv<S: AsRef<CStr>>(path: <span class="kw-2">&</span>CStr, argv: <span class="kw-2">&</span>[S]) -> <span class="prelude-ty">Result</span><Infallible> { |
| <span class="kw">let </span>args_p = to_exec_array(argv); |
| |
| <span class="kw">unsafe </span>{ |
| libc::execv(path.as_ptr(), args_p.as_ptr()) |
| }; |
| |
| <span class="prelude-val">Err</span>(Errno::last()) |
| } |
| |
| |
| <span class="doccomment">/// Replace the current process image with a new one (see |
| /// [execve(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/exec.html)). |
| /// |
| /// The execve system call allows for another process to be "called" which will |
| /// replace the current process image. That is, this process becomes the new |
| /// command that is run. On success, this function will not return. Instead, |
| /// the new program will run until it exits. |
| /// |
| /// `::nix::unistd::execv` and `::nix::unistd::execve` take as arguments a slice |
| /// of `::std::ffi::CString`s for `args` and `env` (for `execve`). Each element |
| /// in the `args` list is an argument to the new process. Each element in the |
| /// `env` list should be a string in the form "key=value". |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>execve<SA: AsRef<CStr>, SE: AsRef<CStr>>(path: <span class="kw-2">&</span>CStr, args: <span class="kw-2">&</span>[SA], env: <span class="kw-2">&</span>[SE]) -> <span class="prelude-ty">Result</span><Infallible> { |
| <span class="kw">let </span>args_p = to_exec_array(args); |
| <span class="kw">let </span>env_p = to_exec_array(env); |
| |
| <span class="kw">unsafe </span>{ |
| libc::execve(path.as_ptr(), args_p.as_ptr(), env_p.as_ptr()) |
| }; |
| |
| <span class="prelude-val">Err</span>(Errno::last()) |
| } |
| |
| <span class="doccomment">/// Replace the current process image with a new one and replicate shell `PATH` |
| /// searching behavior (see |
| /// [exec(3)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/exec.html)). |
| /// |
| /// See `::nix::unistd::execve` for additional details. `execvp` behaves the |
| /// same as execv except that it will examine the `PATH` environment variables |
| /// for file names not specified with a leading slash. For example, `execv` |
| /// would not work if "bash" was specified for the path argument, but `execvp` |
| /// would assuming that a bash executable was on the system `PATH`. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>execvp<S: AsRef<CStr>>(filename: <span class="kw-2">&</span>CStr, args: <span class="kw-2">&</span>[S]) -> <span class="prelude-ty">Result</span><Infallible> { |
| <span class="kw">let </span>args_p = to_exec_array(args); |
| |
| <span class="kw">unsafe </span>{ |
| libc::execvp(filename.as_ptr(), args_p.as_ptr()) |
| }; |
| |
| <span class="prelude-val">Err</span>(Errno::last()) |
| } |
| |
| <span class="doccomment">/// Replace the current process image with a new one and replicate shell `PATH` |
| /// searching behavior (see |
| /// [`execvpe(3)`](https://man7.org/linux/man-pages/man3/exec.3.html)). |
| /// |
| /// This functions like a combination of `execvp(2)` and `execve(2)` to pass an |
| /// environment and have a search path. See these two for additional |
| /// information. |
| </span><span class="attribute">#[cfg(any(target_os = <span class="string">"haiku"</span>, |
| target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"openbsd"</span>))] |
| </span><span class="kw">pub fn </span>execvpe<SA: AsRef<CStr>, SE: AsRef<CStr>>(filename: <span class="kw-2">&</span>CStr, args: <span class="kw-2">&</span>[SA], env: <span class="kw-2">&</span>[SE]) -> <span class="prelude-ty">Result</span><Infallible> { |
| <span class="kw">let </span>args_p = to_exec_array(args); |
| <span class="kw">let </span>env_p = to_exec_array(env); |
| |
| <span class="kw">unsafe </span>{ |
| libc::execvpe(filename.as_ptr(), args_p.as_ptr(), env_p.as_ptr()) |
| }; |
| |
| <span class="prelude-val">Err</span>(Errno::last()) |
| } |
| |
| <span class="doccomment">/// Replace the current process image with a new one (see |
| /// [fexecve(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/fexecve.html)). |
| /// |
| /// The `fexecve` function allows for another process to be "called" which will |
| /// replace the current process image. That is, this process becomes the new |
| /// command that is run. On success, this function will not return. Instead, |
| /// the new program will run until it exits. |
| /// |
| /// This function is similar to `execve`, except that the program to be executed |
| /// is referenced as a file descriptor instead of a path. |
| </span><span class="attribute">#[cfg(any(target_os = <span class="string">"android"</span>, |
| target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"dragonfly"</span>, |
| target_os = <span class="string">"freebsd"</span>))] |
| #[inline] |
| </span><span class="kw">pub fn </span>fexecve<SA: AsRef<CStr> ,SE: AsRef<CStr>>(fd: RawFd, args: <span class="kw-2">&</span>[SA], env: <span class="kw-2">&</span>[SE]) -> <span class="prelude-ty">Result</span><Infallible> { |
| <span class="kw">let </span>args_p = to_exec_array(args); |
| <span class="kw">let </span>env_p = to_exec_array(env); |
| |
| <span class="kw">unsafe </span>{ |
| libc::fexecve(fd, args_p.as_ptr(), env_p.as_ptr()) |
| }; |
| |
| <span class="prelude-val">Err</span>(Errno::last()) |
| } |
| |
| <span class="doccomment">/// Execute program relative to a directory file descriptor (see |
| /// [execveat(2)](https://man7.org/linux/man-pages/man2/execveat.2.html)). |
| /// |
| /// The `execveat` function allows for another process to be "called" which will |
| /// replace the current process image. That is, this process becomes the new |
| /// command that is run. On success, this function will not return. Instead, |
| /// the new program will run until it exits. |
| /// |
| /// This function is similar to `execve`, except that the program to be executed |
| /// is referenced as a file descriptor to the base directory plus a path. |
| </span><span class="attribute">#[cfg(any(target_os = <span class="string">"android"</span>, target_os = <span class="string">"linux"</span>))] |
| #[inline] |
| </span><span class="kw">pub fn </span>execveat<SA: AsRef<CStr>,SE: AsRef<CStr>>(dirfd: RawFd, pathname: <span class="kw-2">&</span>CStr, args: <span class="kw-2">&</span>[SA], |
| env: <span class="kw-2">&</span>[SE], flags: <span class="kw">super</span>::fcntl::AtFlags) -> <span class="prelude-ty">Result</span><Infallible> { |
| <span class="kw">let </span>args_p = to_exec_array(args); |
| <span class="kw">let </span>env_p = to_exec_array(env); |
| |
| <span class="kw">unsafe </span>{ |
| libc::syscall(libc::SYS_execveat, dirfd, pathname.as_ptr(), |
| args_p.as_ptr(), env_p.as_ptr(), flags); |
| }; |
| |
| <span class="prelude-val">Err</span>(Errno::last()) |
| } |
| |
| <span class="doccomment">/// Daemonize this process by detaching from the controlling terminal (see |
| /// [daemon(3)](https://man7.org/linux/man-pages/man3/daemon.3.html)). |
| /// |
| /// When a process is launched it is typically associated with a parent and it, |
| /// in turn, by its controlling terminal/process. In order for a process to run |
| /// in the "background" it must daemonize itself by detaching itself. Under |
| /// posix, this is done by doing the following: |
| /// |
| /// 1. Parent process (this one) forks |
| /// 2. Parent process exits |
| /// 3. Child process continues to run. |
| /// |
| /// `nochdir`: |
| /// |
| /// * `nochdir = true`: The current working directory after daemonizing will |
| /// be the current working directory. |
| /// * `nochdir = false`: The current working directory after daemonizing will |
| /// be the root direcory, `/`. |
| /// |
| /// `noclose`: |
| /// |
| /// * `noclose = true`: The process' current stdin, stdout, and stderr file |
| /// descriptors will remain identical after daemonizing. |
| /// * `noclose = false`: The process' stdin, stdout, and stderr will point to |
| /// `/dev/null` after daemonizing. |
| </span><span class="attribute">#[cfg(any(target_os = <span class="string">"android"</span>, |
| target_os = <span class="string">"dragonfly"</span>, |
| target_os = <span class="string">"freebsd"</span>, |
| target_os = <span class="string">"illumos"</span>, |
| target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"netbsd"</span>, |
| target_os = <span class="string">"openbsd"</span>, |
| target_os = <span class="string">"solaris"</span>))] |
| </span><span class="kw">pub fn </span>daemon(nochdir: bool, noclose: bool) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::daemon(nochdir <span class="kw">as </span>c_int, noclose <span class="kw">as </span>c_int) }; |
| Errno::result(res).map(drop) |
| } |
| } |
| |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![feature = <span class="string">"hostname"</span>] |
| |
| </span><span class="doccomment">/// Set the system host name (see |
| /// [sethostname(2)](https://man7.org/linux/man-pages/man2/gethostname.2.html)). |
| /// |
| /// Given a name, attempt to update the system host name to the given string. |
| /// On some systems, the host name is limited to as few as 64 bytes. An error |
| /// will be returned if the name is not valid or the current process does not |
| /// have permissions to update the host name. |
| </span><span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| </span><span class="kw">pub fn </span>sethostname<S: AsRef<OsStr>>(name: S) -> <span class="prelude-ty">Result</span><()> { |
| <span class="comment">// Handle some differences in type of the len arg across platforms. |
| </span><span class="macro">cfg_if! </span>{ |
| <span class="kw">if </span><span class="attribute">#[cfg(any(target_os = <span class="string">"dragonfly"</span>, |
| target_os = <span class="string">"freebsd"</span>, |
| target_os = <span class="string">"illumos"</span>, |
| target_os = <span class="string">"ios"</span>, |
| target_os = <span class="string">"macos"</span>, |
| target_os = <span class="string">"solaris"</span>, ))] </span>{ |
| <span class="kw">type </span>sethostname_len_t = c_int; |
| } <span class="kw">else </span>{ |
| <span class="kw">type </span>sethostname_len_t = size_t; |
| } |
| } |
| <span class="kw">let </span>ptr = name.as_ref().as_bytes().as_ptr() <span class="kw">as </span><span class="kw-2">*const </span>c_char; |
| <span class="kw">let </span>len = name.as_ref().len() <span class="kw">as </span>sethostname_len_t; |
| |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::sethostname(ptr, len) }; |
| Errno::result(res).map(drop) |
| } |
| |
| <span class="doccomment">/// Get the host name and store it in an internally allocated buffer, returning an |
| /// `OsString` on success (see |
| /// [gethostname(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/gethostname.html)). |
| /// |
| /// This function call attempts to get the host name for the running system and |
| /// store it in an internal buffer, returning it as an `OsString` if successful. |
| /// |
| /// ```no_run |
| /// use nix::unistd; |
| /// |
| /// let hostname = unistd::gethostname().expect("Failed getting hostname"); |
| /// let hostname = hostname.into_string().expect("Hostname wasn't valid UTF-8"); |
| /// println!("Hostname: {}", hostname); |
| /// ``` |
| </span><span class="kw">pub fn </span>gethostname() -> <span class="prelude-ty">Result</span><OsString> { |
| <span class="comment">// The capacity is the max length of a hostname plus the NUL terminator. |
| </span><span class="kw">let </span><span class="kw-2">mut </span>buffer: Vec<u8> = Vec::with_capacity(<span class="number">256</span>); |
| <span class="kw">let </span>ptr = buffer.as_mut_ptr() <span class="kw">as </span><span class="kw-2">*mut </span>c_char; |
| <span class="kw">let </span>len = buffer.capacity() <span class="kw">as </span>size_t; |
| |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::gethostname(ptr, len) }; |
| Errno::result(res).map(|<span class="kw">_</span>| { |
| <span class="kw">unsafe </span>{ |
| buffer.as_mut_ptr().wrapping_add(len - <span class="number">1</span>).write(<span class="number">0</span>); <span class="comment">// ensure always null-terminated |
| </span><span class="kw">let </span>len = CStr::from_ptr(buffer.as_ptr() <span class="kw">as </span><span class="kw-2">*const </span>c_char).len(); |
| buffer.set_len(len); |
| } |
| OsString::from_vec(buffer) |
| }) |
| } |
| } |
| |
| <span class="doccomment">/// Close a raw file descriptor |
| /// |
| /// Be aware that many Rust types implicitly close-on-drop, including |
| /// `std::fs::File`. Explicitly closing them with this method too can result in |
| /// a double-close condition, which can cause confusing `EBADF` errors in |
| /// seemingly unrelated code. Caveat programmer. See also |
| /// [close(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/close.html). |
| /// |
| /// # Examples |
| /// |
| /// ```no_run |
| /// use std::os::unix::io::AsRawFd; |
| /// use nix::unistd::close; |
| /// |
| /// let f = tempfile::tempfile().unwrap(); |
| /// close(f.as_raw_fd()).unwrap(); // Bad! f will also close on drop! |
| /// ``` |
| /// |
| /// ```rust |
| /// use std::os::unix::io::IntoRawFd; |
| /// use nix::unistd::close; |
| /// |
| /// let f = tempfile::tempfile().unwrap(); |
| /// close(f.into_raw_fd()).unwrap(); // Good. into_raw_fd consumes f |
| /// ``` |
| </span><span class="kw">pub fn </span>close(fd: RawFd) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::close(fd) }; |
| Errno::result(res).map(drop) |
| } |
| |
| <span class="doccomment">/// Read from a raw file descriptor. |
| /// |
| /// See also [read(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/read.html) |
| </span><span class="kw">pub fn </span>read(fd: RawFd, buf: <span class="kw-2">&mut </span>[u8]) -> <span class="prelude-ty">Result</span><usize> { |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ |
| libc::read(fd, buf.as_mut_ptr() <span class="kw">as </span><span class="kw-2">*mut </span>c_void, buf.len() <span class="kw">as </span>size_t) |
| }; |
| |
| Errno::result(res).map(|r| r <span class="kw">as </span>usize) |
| } |
| |
| <span class="doccomment">/// Write to a raw file descriptor. |
| /// |
| /// See also [write(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/write.html) |
| </span><span class="kw">pub fn </span>write(fd: RawFd, buf: <span class="kw-2">&</span>[u8]) -> <span class="prelude-ty">Result</span><usize> { |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ |
| libc::write(fd, buf.as_ptr() <span class="kw">as </span><span class="kw-2">*const </span>c_void, buf.len() <span class="kw">as </span>size_t) |
| }; |
| |
| Errno::result(res).map(|r| r <span class="kw">as </span>usize) |
| } |
| |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![feature = <span class="string">"fs"</span>] |
| |
| </span><span class="doccomment">/// Directive that tells [`lseek`] and [`lseek64`] what the offset is relative to. |
| /// |
| /// [`lseek`]: ./fn.lseek.html |
| /// [`lseek64`]: ./fn.lseek64.html |
| </span><span class="attribute">#[repr(i32)] |
| #[derive(Clone, Copy, Debug)] |
| </span><span class="kw">pub enum </span>Whence { |
| <span class="doccomment">/// Specify an offset relative to the start of the file. |
| </span>SeekSet = libc::SEEK_SET, |
| <span class="doccomment">/// Specify an offset relative to the current file location. |
| </span>SeekCur = libc::SEEK_CUR, |
| <span class="doccomment">/// Specify an offset relative to the end of the file. |
| </span>SeekEnd = libc::SEEK_END, |
| <span class="doccomment">/// Specify an offset relative to the next location in the file greater than or |
| /// equal to offset that contains some data. If offset points to |
| /// some data, then the file offset is set to offset. |
| </span><span class="attribute">#[cfg(any(target_os = <span class="string">"dragonfly"</span>, |
| target_os = <span class="string">"freebsd"</span>, |
| target_os = <span class="string">"illumos"</span>, |
| target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"solaris"</span>))] |
| </span>SeekData = libc::SEEK_DATA, |
| <span class="doccomment">/// Specify an offset relative to the next hole in the file greater than |
| /// or equal to offset. If offset points into the middle of a hole, then |
| /// the file offset should be set to offset. If there is no hole past offset, |
| /// then the file offset should be adjusted to the end of the file (i.e., there |
| /// is an implicit hole at the end of any file). |
| </span><span class="attribute">#[cfg(any(target_os = <span class="string">"dragonfly"</span>, |
| target_os = <span class="string">"freebsd"</span>, |
| target_os = <span class="string">"illumos"</span>, |
| target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"solaris"</span>))] |
| </span>SeekHole = libc::SEEK_HOLE |
| } |
| |
| <span class="doccomment">/// Move the read/write file offset. |
| /// |
| /// See also [lseek(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/lseek.html) |
| </span><span class="kw">pub fn </span>lseek(fd: RawFd, offset: off_t, whence: Whence) -> <span class="prelude-ty">Result</span><off_t> { |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::lseek(fd, offset, whence <span class="kw">as </span>i32) }; |
| |
| Errno::result(res).map(|r| r <span class="kw">as </span>off_t) |
| } |
| |
| <span class="attribute">#[cfg(any(target_os = <span class="string">"linux"</span>, target_os = <span class="string">"android"</span>))] |
| </span><span class="kw">pub fn </span>lseek64(fd: RawFd, offset: libc::off64_t, whence: Whence) -> <span class="prelude-ty">Result</span><libc::off64_t> { |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::lseek64(fd, offset, whence <span class="kw">as </span>i32) }; |
| |
| Errno::result(res).map(|r| r <span class="kw">as </span>libc::off64_t) |
| } |
| } |
| |
| <span class="doccomment">/// Create an interprocess channel. |
| /// |
| /// See also [pipe(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/pipe.html) |
| </span><span class="kw">pub fn </span>pipe() -> std::result::Result<(RawFd, RawFd), Error> { |
| <span class="kw">let </span><span class="kw-2">mut </span>fds = mem::MaybeUninit::<[c_int; <span class="number">2</span>]>::uninit(); |
| |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::pipe(fds.as_mut_ptr() <span class="kw">as </span><span class="kw-2">*mut </span>c_int) }; |
| |
| Error::result(res)<span class="question-mark">?</span>; |
| |
| <span class="kw">unsafe </span>{ <span class="prelude-val">Ok</span>((fds.assume_init()[<span class="number">0</span>], fds.assume_init()[<span class="number">1</span>])) } |
| } |
| |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![feature = <span class="string">"fs"</span>] |
| </span><span class="doccomment">/// Like `pipe`, but allows setting certain file descriptor flags. |
| /// |
| /// The following flags are supported, and will be set atomically as the pipe is |
| /// created: |
| /// |
| /// - `O_CLOEXEC`: Set the close-on-exec flag for the new file descriptors. |
| </span><span class="attribute">#[cfg_attr(target_os = <span class="string">"linux"</span>, doc = <span class="string">"- `O_DIRECT`: Create a pipe that performs I/O in \"packet\" mode."</span>)] |
| #[cfg_attr(target_os = <span class="string">"netbsd"</span>, doc = <span class="string">"- `O_NOSIGPIPE`: Return `EPIPE` instead of raising `SIGPIPE`."</span>)] |
| </span><span class="doccomment">/// - `O_NONBLOCK`: Set the non-blocking flag for the ends of the pipe. |
| /// |
| /// See also [pipe(2)](https://man7.org/linux/man-pages/man2/pipe.2.html) |
| </span><span class="attribute">#[cfg(any(target_os = <span class="string">"android"</span>, |
| target_os = <span class="string">"dragonfly"</span>, |
| target_os = <span class="string">"emscripten"</span>, |
| target_os = <span class="string">"freebsd"</span>, |
| target_os = <span class="string">"illumos"</span>, |
| target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"redox"</span>, |
| target_os = <span class="string">"netbsd"</span>, |
| target_os = <span class="string">"openbsd"</span>, |
| target_os = <span class="string">"solaris"</span>))] |
| </span><span class="kw">pub fn </span>pipe2(flags: OFlag) -> <span class="prelude-ty">Result</span><(RawFd, RawFd)> { |
| <span class="kw">let </span><span class="kw-2">mut </span>fds = mem::MaybeUninit::<[c_int; <span class="number">2</span>]>::uninit(); |
| |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ |
| libc::pipe2(fds.as_mut_ptr() <span class="kw">as </span><span class="kw-2">*mut </span>c_int, flags.bits()) |
| }; |
| |
| Errno::result(res)<span class="question-mark">?</span>; |
| |
| <span class="kw">unsafe </span>{ <span class="prelude-val">Ok</span>((fds.assume_init()[<span class="number">0</span>], fds.assume_init()[<span class="number">1</span>])) } |
| } |
| |
| <span class="doccomment">/// Truncate a file to a specified length |
| /// |
| /// See also |
| /// [truncate(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/truncate.html) |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"fuchsia"</span>)))] |
| </span><span class="kw">pub fn </span>truncate<P: <span class="question-mark">?</span>Sized + NixPath>(path: <span class="kw-2">&</span>P, len: off_t) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = path.with_nix_path(|cstr| { |
| <span class="kw">unsafe </span>{ |
| libc::truncate(cstr.as_ptr(), len) |
| } |
| })<span class="question-mark">?</span>; |
| |
| Errno::result(res).map(drop) |
| } |
| |
| <span class="doccomment">/// Truncate a file to a specified length |
| /// |
| /// See also |
| /// [ftruncate(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/ftruncate.html) |
| </span><span class="kw">pub fn </span>ftruncate(fd: RawFd, len: off_t) -> <span class="prelude-ty">Result</span><()> { |
| Errno::result(<span class="kw">unsafe </span>{ libc::ftruncate(fd, len) }).map(drop) |
| } |
| |
| <span class="kw">pub fn </span>isatty(fd: RawFd) -> <span class="prelude-ty">Result</span><bool> { |
| <span class="kw">unsafe </span>{ |
| <span class="comment">// ENOTTY means `fd` is a valid file descriptor, but not a TTY, so |
| // we return `Ok(false)` |
| </span><span class="kw">if </span>libc::isatty(fd) == <span class="number">1 </span>{ |
| <span class="prelude-val">Ok</span>(<span class="bool-val">true</span>) |
| } <span class="kw">else </span>{ |
| <span class="kw">match </span>Errno::last() { |
| Errno::ENOTTY => <span class="prelude-val">Ok</span>(<span class="bool-val">false</span>), |
| err => <span class="prelude-val">Err</span>(err), |
| } |
| } |
| } |
| } |
| |
| <span class="doccomment">/// Flags for `linkat` function. |
| </span><span class="attribute">#[derive(Clone, Copy, Debug)] |
| </span><span class="kw">pub enum </span>LinkatFlags { |
| SymlinkFollow, |
| NoSymlinkFollow, |
| } |
| |
| <span class="doccomment">/// Link one file to another file |
| /// |
| /// Creates a new link (directory entry) at `newpath` for the existing file at `oldpath`. In the |
| /// case of a relative `oldpath`, the path is interpreted relative to the directory associated |
| /// with file descriptor `olddirfd` instead of the current working directory and similiarly for |
| /// `newpath` and file descriptor `newdirfd`. In case `flag` is LinkatFlags::SymlinkFollow and |
| /// `oldpath` names a symoblic link, a new link for the target of the symbolic link is created. |
| /// If either `olddirfd` or `newdirfd` is `None`, `AT_FDCWD` is used respectively where `oldpath` |
| /// and/or `newpath` is then interpreted relative to the current working directory of the calling |
| /// process. If either `oldpath` or `newpath` is absolute, then `dirfd` is ignored. |
| /// |
| /// # References |
| /// See also [linkat(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/linkat.html) |
| </span><span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] </span><span class="comment">// RedoxFS does not support symlinks yet |
| </span><span class="kw">pub fn </span>linkat<P: <span class="question-mark">?</span>Sized + NixPath>( |
| olddirfd: <span class="prelude-ty">Option</span><RawFd>, |
| oldpath: <span class="kw-2">&</span>P, |
| newdirfd: <span class="prelude-ty">Option</span><RawFd>, |
| newpath: <span class="kw-2">&</span>P, |
| flag: LinkatFlags, |
| ) -> <span class="prelude-ty">Result</span><()> { |
| |
| <span class="kw">let </span>atflag = |
| <span class="kw">match </span>flag { |
| LinkatFlags::SymlinkFollow => AtFlags::AT_SYMLINK_FOLLOW, |
| LinkatFlags::NoSymlinkFollow => AtFlags::empty(), |
| }; |
| |
| <span class="kw">let </span>res = |
| oldpath.with_nix_path(|oldcstr| { |
| newpath.with_nix_path(|newcstr| { |
| <span class="kw">unsafe </span>{ |
| libc::linkat( |
| at_rawfd(olddirfd), |
| oldcstr.as_ptr(), |
| at_rawfd(newdirfd), |
| newcstr.as_ptr(), |
| atflag.bits() <span class="kw">as </span>libc::c_int |
| ) |
| } |
| }) |
| })<span class="question-mark">??</span>; |
| Errno::result(res).map(drop) |
| } |
| |
| |
| <span class="doccomment">/// Remove a directory entry |
| /// |
| /// See also [unlink(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/unlink.html) |
| </span><span class="kw">pub fn </span>unlink<P: <span class="question-mark">?</span>Sized + NixPath>(path: <span class="kw-2">&</span>P) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = path.with_nix_path(|cstr| { |
| <span class="kw">unsafe </span>{ |
| libc::unlink(cstr.as_ptr()) |
| } |
| })<span class="question-mark">?</span>; |
| Errno::result(res).map(drop) |
| } |
| |
| <span class="doccomment">/// Flags for `unlinkat` function. |
| </span><span class="attribute">#[derive(Clone, Copy, Debug)] |
| </span><span class="kw">pub enum </span>UnlinkatFlags { |
| RemoveDir, |
| NoRemoveDir, |
| } |
| |
| <span class="doccomment">/// Remove a directory entry |
| /// |
| /// In the case of a relative path, the directory entry to be removed is determined relative to |
| /// the directory associated with the file descriptor `dirfd` or the current working directory |
| /// if `dirfd` is `None`. In the case of an absolute `path` `dirfd` is ignored. If `flag` is |
| /// `UnlinkatFlags::RemoveDir` then removal of the directory entry specified by `dirfd` and `path` |
| /// is performed. |
| /// |
| /// # References |
| /// See also [unlinkat(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/unlinkat.html) |
| </span><span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| </span><span class="kw">pub fn </span>unlinkat<P: <span class="question-mark">?</span>Sized + NixPath>( |
| dirfd: <span class="prelude-ty">Option</span><RawFd>, |
| path: <span class="kw-2">&</span>P, |
| flag: UnlinkatFlags, |
| ) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>atflag = |
| <span class="kw">match </span>flag { |
| UnlinkatFlags::RemoveDir => AtFlags::AT_REMOVEDIR, |
| UnlinkatFlags::NoRemoveDir => AtFlags::empty(), |
| }; |
| <span class="kw">let </span>res = path.with_nix_path(|cstr| { |
| <span class="kw">unsafe </span>{ |
| libc::unlinkat(at_rawfd(dirfd), cstr.as_ptr(), atflag.bits() <span class="kw">as </span>libc::c_int) |
| } |
| })<span class="question-mark">?</span>; |
| Errno::result(res).map(drop) |
| } |
| |
| |
| <span class="attribute">#[inline] |
| #[cfg(not(target_os = <span class="string">"fuchsia"</span>))] |
| </span><span class="kw">pub fn </span>chroot<P: <span class="question-mark">?</span>Sized + NixPath>(path: <span class="kw-2">&</span>P) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = path.with_nix_path(|cstr| { |
| <span class="kw">unsafe </span>{ libc::chroot(cstr.as_ptr()) } |
| })<span class="question-mark">?</span>; |
| |
| Errno::result(res).map(drop) |
| } |
| |
| <span class="doccomment">/// Commit filesystem caches to disk |
| /// |
| /// See also [sync(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/sync.html) |
| </span><span class="attribute">#[cfg(any( |
| target_os = <span class="string">"dragonfly"</span>, |
| target_os = <span class="string">"freebsd"</span>, |
| target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"netbsd"</span>, |
| target_os = <span class="string">"openbsd" |
| </span>))] |
| </span><span class="kw">pub fn </span>sync() { |
| <span class="kw">unsafe </span>{ libc::sync() }; |
| } |
| |
| <span class="doccomment">/// Commit filesystem caches containing file referred to by the open file |
| /// descriptor `fd` to disk |
| /// |
| /// See also [syncfs(2)](https://man7.org/linux/man-pages/man2/sync.2.html) |
| </span><span class="attribute">#[cfg(target_os = <span class="string">"linux"</span>)] |
| </span><span class="kw">pub fn </span>syncfs(fd: RawFd) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::syncfs(fd) }; |
| |
| Errno::result(res).map(drop) |
| } |
| |
| <span class="doccomment">/// Synchronize changes to a file |
| /// |
| /// See also [fsync(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/fsync.html) |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>fsync(fd: RawFd) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::fsync(fd) }; |
| |
| Errno::result(res).map(drop) |
| } |
| |
| <span class="doccomment">/// Synchronize the data of a file |
| /// |
| /// See also |
| /// [fdatasync(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/fdatasync.html) |
| </span><span class="attribute">#[cfg(any(target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"android"</span>, |
| target_os = <span class="string">"emscripten"</span>, |
| target_os = <span class="string">"freebsd"</span>, |
| target_os = <span class="string">"fuchsia"</span>, |
| target_os = <span class="string">"netbsd"</span>, |
| target_os = <span class="string">"openbsd"</span>, |
| target_os = <span class="string">"illumos"</span>, |
| target_os = <span class="string">"solaris"</span>))] |
| #[inline] |
| </span><span class="kw">pub fn </span>fdatasync(fd: RawFd) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::fdatasync(fd) }; |
| |
| Errno::result(res).map(drop) |
| } |
| } |
| |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![feature = <span class="string">"user"</span>] |
| |
| </span><span class="doccomment">/// Get a real user ID |
| /// |
| /// See also [getuid(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/getuid.html) |
| </span><span class="comment">// POSIX requires that getuid is always successful, so no need to check return |
| // value or errno. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>getuid() -> Uid { |
| Uid(<span class="kw">unsafe </span>{ libc::getuid() }) |
| } |
| |
| <span class="doccomment">/// Get the effective user ID |
| /// |
| /// See also [geteuid(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/geteuid.html) |
| </span><span class="comment">// POSIX requires that geteuid is always successful, so no need to check return |
| // value or errno. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>geteuid() -> Uid { |
| Uid(<span class="kw">unsafe </span>{ libc::geteuid() }) |
| } |
| |
| <span class="doccomment">/// Get the real group ID |
| /// |
| /// See also [getgid(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/getgid.html) |
| </span><span class="comment">// POSIX requires that getgid is always successful, so no need to check return |
| // value or errno. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>getgid() -> Gid { |
| Gid(<span class="kw">unsafe </span>{ libc::getgid() }) |
| } |
| |
| <span class="doccomment">/// Get the effective group ID |
| /// |
| /// See also [getegid(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/getegid.html) |
| </span><span class="comment">// POSIX requires that getegid is always successful, so no need to check return |
| // value or errno. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>getegid() -> Gid { |
| Gid(<span class="kw">unsafe </span>{ libc::getegid() }) |
| } |
| |
| <span class="doccomment">/// Set the effective user ID |
| /// |
| /// See also [seteuid(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/seteuid.html) |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>seteuid(euid: Uid) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::seteuid(euid.into()) }; |
| |
| Errno::result(res).map(drop) |
| } |
| |
| <span class="doccomment">/// Set the effective group ID |
| /// |
| /// See also [setegid(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/setegid.html) |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>setegid(egid: Gid) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::setegid(egid.into()) }; |
| |
| Errno::result(res).map(drop) |
| } |
| |
| <span class="doccomment">/// Set the user ID |
| /// |
| /// See also [setuid(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/setuid.html) |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>setuid(uid: Uid) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::setuid(uid.into()) }; |
| |
| Errno::result(res).map(drop) |
| } |
| |
| <span class="doccomment">/// Set the group ID |
| /// |
| /// See also [setgid(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/setgid.html) |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>setgid(gid: Gid) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::setgid(gid.into()) }; |
| |
| Errno::result(res).map(drop) |
| } |
| } |
| |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![all(feature = <span class="string">"fs"</span>, feature = <span class="string">"user"</span>)] |
| </span><span class="doccomment">/// Set the user identity used for filesystem checks per-thread. |
| /// On both success and failure, this call returns the previous filesystem user |
| /// ID of the caller. |
| /// |
| /// See also [setfsuid(2)](https://man7.org/linux/man-pages/man2/setfsuid.2.html) |
| </span><span class="attribute">#[cfg(any(target_os = <span class="string">"linux"</span>, target_os = <span class="string">"android"</span>))] |
| </span><span class="kw">pub fn </span>setfsuid(uid: Uid) -> Uid { |
| <span class="kw">let </span>prev_fsuid = <span class="kw">unsafe </span>{ libc::setfsuid(uid.into()) }; |
| Uid::from_raw(prev_fsuid <span class="kw">as </span>uid_t) |
| } |
| |
| <span class="doccomment">/// Set the group identity used for filesystem checks per-thread. |
| /// On both success and failure, this call returns the previous filesystem group |
| /// ID of the caller. |
| /// |
| /// See also [setfsgid(2)](https://man7.org/linux/man-pages/man2/setfsgid.2.html) |
| </span><span class="attribute">#[cfg(any(target_os = <span class="string">"linux"</span>, target_os = <span class="string">"android"</span>))] |
| </span><span class="kw">pub fn </span>setfsgid(gid: Gid) -> Gid { |
| <span class="kw">let </span>prev_fsgid = <span class="kw">unsafe </span>{ libc::setfsgid(gid.into()) }; |
| Gid::from_raw(prev_fsgid <span class="kw">as </span>gid_t) |
| } |
| } |
| |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![feature = <span class="string">"user"</span>] |
| |
| </span><span class="doccomment">/// Get the list of supplementary group IDs of the calling process. |
| /// |
| /// [Further reading](https://pubs.opengroup.org/onlinepubs/009695399/functions/getgroups.html) |
| /// |
| /// **Note:** This function is not available for Apple platforms. On those |
| /// platforms, checking group membership should be achieved via communication |
| /// with the `opendirectoryd` service. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"ios"</span>, target_os = <span class="string">"macos"</span>)))] |
| </span><span class="kw">pub fn </span>getgroups() -> <span class="prelude-ty">Result</span><Vec<Gid>> { |
| <span class="comment">// First get the maximum number of groups. The value returned |
| // shall always be greater than or equal to one and less than or |
| // equal to the value of {NGROUPS_MAX} + 1. |
| </span><span class="kw">let </span>ngroups_max = <span class="kw">match </span>sysconf(SysconfVar::NGROUPS_MAX) { |
| <span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>(n)) => (n + <span class="number">1</span>) <span class="kw">as </span>usize, |
| <span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>) | <span class="prelude-val">Err</span>(<span class="kw">_</span>) => <usize>::max_value(), |
| }; |
| |
| <span class="comment">// Next, get the number of groups so we can size our Vec |
| </span><span class="kw">let </span>ngroups = <span class="kw">unsafe </span>{ libc::getgroups(<span class="number">0</span>, ptr::null_mut()) }; |
| |
| <span class="comment">// If there are no supplementary groups, return early. |
| // This prevents a potential buffer over-read if the number of groups |
| // increases from zero before the next call. It would return the total |
| // number of groups beyond the capacity of the buffer. |
| </span><span class="kw">if </span>ngroups == <span class="number">0 </span>{ |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(Vec::new()); |
| } |
| |
| <span class="comment">// Now actually get the groups. We try multiple times in case the number of |
| // groups has changed since the first call to getgroups() and the buffer is |
| // now too small. |
| </span><span class="kw">let </span><span class="kw-2">mut </span>groups = Vec::<Gid>::with_capacity(Errno::result(ngroups)<span class="question-mark">? </span><span class="kw">as </span>usize); |
| <span class="kw">loop </span>{ |
| <span class="comment">// FIXME: On the platforms we currently support, the `Gid` struct has |
| // the same representation in memory as a bare `gid_t`. This is not |
| // necessarily the case on all Rust platforms, though. See RFC 1785. |
| </span><span class="kw">let </span>ngroups = <span class="kw">unsafe </span>{ |
| libc::getgroups(groups.capacity() <span class="kw">as </span>c_int, groups.as_mut_ptr() <span class="kw">as </span><span class="kw-2">*mut </span>gid_t) |
| }; |
| |
| <span class="kw">match </span>Errno::result(ngroups) { |
| <span class="prelude-val">Ok</span>(s) => { |
| <span class="kw">unsafe </span>{ groups.set_len(s <span class="kw">as </span>usize) }; |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(groups); |
| }, |
| <span class="prelude-val">Err</span>(Errno::EINVAL) => { |
| <span class="comment">// EINVAL indicates that the buffer size was too |
| // small, resize it up to ngroups_max as limit. |
| </span>reserve_double_buffer_size(<span class="kw-2">&mut </span>groups, ngroups_max) |
| .or(<span class="prelude-val">Err</span>(Errno::EINVAL))<span class="question-mark">?</span>; |
| }, |
| <span class="prelude-val">Err</span>(e) => <span class="kw">return </span><span class="prelude-val">Err</span>(e) |
| } |
| } |
| } |
| |
| <span class="doccomment">/// Set the list of supplementary group IDs for the calling process. |
| /// |
| /// [Further reading](https://man7.org/linux/man-pages/man2/getgroups.2.html) |
| /// |
| /// **Note:** This function is not available for Apple platforms. On those |
| /// platforms, group membership management should be achieved via communication |
| /// with the `opendirectoryd` service. |
| /// |
| /// # Examples |
| /// |
| /// `setgroups` can be used when dropping privileges from the root user to a |
| /// specific user and group. For example, given the user `www-data` with UID |
| /// `33` and the group `backup` with the GID `34`, one could switch the user as |
| /// follows: |
| /// |
| /// ```rust,no_run |
| /// # use std::error::Error; |
| /// # use nix::unistd::*; |
| /// # |
| /// # fn try_main() -> Result<(), Box<dyn Error>> { |
| /// let uid = Uid::from_raw(33); |
| /// let gid = Gid::from_raw(34); |
| /// setgroups(&[gid])?; |
| /// setgid(gid)?; |
| /// setuid(uid)?; |
| /// # |
| /// # Ok(()) |
| /// # } |
| /// # |
| /// # try_main().unwrap(); |
| /// ``` |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"ios"</span>, target_os = <span class="string">"macos"</span>, target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| </span><span class="kw">pub fn </span>setgroups(groups: <span class="kw-2">&</span>[Gid]) -> <span class="prelude-ty">Result</span><()> { |
| <span class="macro">cfg_if! </span>{ |
| <span class="kw">if </span><span class="attribute">#[cfg(any(target_os = <span class="string">"dragonfly"</span>, |
| target_os = <span class="string">"freebsd"</span>, |
| target_os = <span class="string">"illumos"</span>, |
| target_os = <span class="string">"ios"</span>, |
| target_os = <span class="string">"macos"</span>, |
| target_os = <span class="string">"netbsd"</span>, |
| target_os = <span class="string">"illumos"</span>, |
| target_os = <span class="string">"openbsd"</span>))] </span>{ |
| <span class="kw">type </span>setgroups_ngroups_t = c_int; |
| } <span class="kw">else </span>{ |
| <span class="kw">type </span>setgroups_ngroups_t = size_t; |
| } |
| } |
| <span class="comment">// FIXME: On the platforms we currently support, the `Gid` struct has the |
| // same representation in memory as a bare `gid_t`. This is not necessarily |
| // the case on all Rust platforms, though. See RFC 1785. |
| </span><span class="kw">let </span>res = <span class="kw">unsafe </span>{ |
| libc::setgroups(groups.len() <span class="kw">as </span>setgroups_ngroups_t, groups.as_ptr() <span class="kw">as </span><span class="kw-2">*const </span>gid_t) |
| }; |
| |
| Errno::result(res).map(drop) |
| } |
| |
| <span class="doccomment">/// Calculate the supplementary group access list. |
| /// |
| /// Gets the group IDs of all groups that `user` is a member of. The additional |
| /// group `group` is also added to the list. |
| /// |
| /// [Further reading](https://man7.org/linux/man-pages/man3/getgrouplist.3.html) |
| /// |
| /// **Note:** This function is not available for Apple platforms. On those |
| /// platforms, checking group membership should be achieved via communication |
| /// with the `opendirectoryd` service. |
| /// |
| /// # Errors |
| /// |
| /// Although the `getgrouplist()` call does not return any specific |
| /// errors on any known platforms, this implementation will return a system |
| /// error of `EINVAL` if the number of groups to be fetched exceeds the |
| /// `NGROUPS_MAX` sysconf value. This mimics the behaviour of `getgroups()` |
| /// and `setgroups()`. Additionally, while some implementations will return a |
| /// partial list of groups when `NGROUPS_MAX` is exceeded, this implementation |
| /// will only ever return the complete list or else an error. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"illumos"</span>, |
| target_os = <span class="string">"ios"</span>, |
| target_os = <span class="string">"macos"</span>, |
| target_os = <span class="string">"redox"</span>)))] |
| </span><span class="kw">pub fn </span>getgrouplist(user: <span class="kw-2">&</span>CStr, group: Gid) -> <span class="prelude-ty">Result</span><Vec<Gid>> { |
| <span class="kw">let </span>ngroups_max = <span class="kw">match </span>sysconf(SysconfVar::NGROUPS_MAX) { |
| <span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>(n)) => n <span class="kw">as </span>c_int, |
| <span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>) | <span class="prelude-val">Err</span>(<span class="kw">_</span>) => <c_int>::max_value(), |
| }; |
| <span class="kw">use </span>std::cmp::min; |
| <span class="kw">let </span><span class="kw-2">mut </span>groups = Vec::<Gid>::with_capacity(min(ngroups_max, <span class="number">8</span>) <span class="kw">as </span>usize); |
| <span class="macro">cfg_if! </span>{ |
| <span class="kw">if </span><span class="attribute">#[cfg(any(target_os = <span class="string">"ios"</span>, target_os = <span class="string">"macos"</span>))] </span>{ |
| <span class="kw">type </span>getgrouplist_group_t = c_int; |
| } <span class="kw">else </span>{ |
| <span class="kw">type </span>getgrouplist_group_t = gid_t; |
| } |
| } |
| <span class="kw">let </span>gid: gid_t = group.into(); |
| <span class="kw">loop </span>{ |
| <span class="kw">let </span><span class="kw-2">mut </span>ngroups = groups.capacity() <span class="kw">as </span>i32; |
| <span class="kw">let </span>ret = <span class="kw">unsafe </span>{ |
| libc::getgrouplist(user.as_ptr(), |
| gid <span class="kw">as </span>getgrouplist_group_t, |
| groups.as_mut_ptr() <span class="kw">as </span><span class="kw-2">*mut </span>getgrouplist_group_t, |
| <span class="kw-2">&mut </span>ngroups) |
| }; |
| |
| <span class="comment">// BSD systems only return 0 or -1, Linux returns ngroups on success. |
| </span><span class="kw">if </span>ret >= <span class="number">0 </span>{ |
| <span class="kw">unsafe </span>{ groups.set_len(ngroups <span class="kw">as </span>usize) }; |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(groups); |
| } <span class="kw">else if </span>ret == -<span class="number">1 </span>{ |
| <span class="comment">// Returns -1 if ngroups is too small, but does not set errno. |
| // BSD systems will still fill the groups buffer with as many |
| // groups as possible, but Linux manpages do not mention this |
| // behavior. |
| </span>reserve_double_buffer_size(<span class="kw-2">&mut </span>groups, ngroups_max <span class="kw">as </span>usize) |
| .map_err(|<span class="kw">_</span>| Errno::EINVAL)<span class="question-mark">?</span>; |
| } |
| } |
| } |
| |
| <span class="doccomment">/// Initialize the supplementary group access list. |
| /// |
| /// Sets the supplementary group IDs for the calling process using all groups |
| /// that `user` is a member of. The additional group `group` is also added to |
| /// the list. |
| /// |
| /// [Further reading](https://man7.org/linux/man-pages/man3/initgroups.3.html) |
| /// |
| /// **Note:** This function is not available for Apple platforms. On those |
| /// platforms, group membership management should be achieved via communication |
| /// with the `opendirectoryd` service. |
| /// |
| /// # Examples |
| /// |
| /// `initgroups` can be used when dropping privileges from the root user to |
| /// another user. For example, given the user `www-data`, we could look up the |
| /// UID and GID for the user in the system's password database (usually found |
| /// in `/etc/passwd`). If the `www-data` user's UID and GID were `33` and `33`, |
| /// respectively, one could switch the user as follows: |
| /// |
| /// ```rust,no_run |
| /// # use std::error::Error; |
| /// # use std::ffi::CString; |
| /// # use nix::unistd::*; |
| /// # |
| /// # fn try_main() -> Result<(), Box<dyn Error>> { |
| /// let user = CString::new("www-data").unwrap(); |
| /// let uid = Uid::from_raw(33); |
| /// let gid = Gid::from_raw(33); |
| /// initgroups(&user, gid)?; |
| /// setgid(gid)?; |
| /// setuid(uid)?; |
| /// # |
| /// # Ok(()) |
| /// # } |
| /// # |
| /// # try_main().unwrap(); |
| /// ``` |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"ios"</span>, target_os = <span class="string">"macos"</span>, target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| </span><span class="kw">pub fn </span>initgroups(user: <span class="kw-2">&</span>CStr, group: Gid) -> <span class="prelude-ty">Result</span><()> { |
| <span class="macro">cfg_if! </span>{ |
| <span class="kw">if </span><span class="attribute">#[cfg(any(target_os = <span class="string">"ios"</span>, target_os = <span class="string">"macos"</span>))] </span>{ |
| <span class="kw">type </span>initgroups_group_t = c_int; |
| } <span class="kw">else </span>{ |
| <span class="kw">type </span>initgroups_group_t = gid_t; |
| } |
| } |
| <span class="kw">let </span>gid: gid_t = group.into(); |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::initgroups(user.as_ptr(), gid <span class="kw">as </span>initgroups_group_t) }; |
| |
| Errno::result(res).map(drop) |
| } |
| } |
| |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![feature = <span class="string">"signal"</span>] |
| |
| </span><span class="doccomment">/// Suspend the thread until a signal is received. |
| /// |
| /// See also [pause(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/pause.html). |
| </span><span class="attribute">#[inline] |
| #[cfg(not(target_os = <span class="string">"redox"</span>))] |
| </span><span class="kw">pub fn </span>pause() { |
| <span class="kw">unsafe </span>{ libc::pause() }; |
| } |
| |
| <span class="kw">pub mod </span>alarm { |
| <span class="doccomment">//! Alarm signal scheduling. |
| //! |
| //! Scheduling an alarm will trigger a `SIGALRM` signal when the time has |
| //! elapsed, which has to be caught, because the default action for the |
| //! signal is to terminate the program. This signal also can't be ignored |
| //! because the system calls like `pause` will not be interrupted, see the |
| //! second example below. |
| //! |
| //! # Examples |
| //! |
| //! Canceling an alarm: |
| //! |
| //! ``` |
| //! use nix::unistd::alarm; |
| //! |
| //! // Set an alarm for 60 seconds from now. |
| //! alarm::set(60); |
| //! |
| //! // Cancel the above set alarm, which returns the number of seconds left |
| //! // of the previously set alarm. |
| //! assert_eq!(alarm::cancel(), Some(60)); |
| //! ``` |
| //! |
| //! Scheduling an alarm and waiting for the signal: |
| //! |
| </span><span class="attribute">#![cfg_attr(target_os = <span class="string">"redox"</span>, doc = <span class="string">" ```rust,ignore"</span>)] |
| #![cfg_attr(not(target_os = <span class="string">"redox"</span>), doc = <span class="string">" ```rust"</span>)] |
| </span><span class="doccomment">//! use std::time::{Duration, Instant}; |
| //! |
| //! use nix::unistd::{alarm, pause}; |
| //! use nix::sys::signal::*; |
| //! |
| //! // We need to setup an empty signal handler to catch the alarm signal, |
| //! // otherwise the program will be terminated once the signal is delivered. |
| //! extern fn signal_handler(_: nix::libc::c_int) { } |
| //! let sa = SigAction::new( |
| //! SigHandler::Handler(signal_handler), |
| //! SaFlags::SA_RESTART, |
| //! SigSet::empty() |
| //! ); |
| //! unsafe { |
| //! sigaction(Signal::SIGALRM, &sa); |
| //! } |
| //! |
| //! let start = Instant::now(); |
| //! |
| //! // Set an alarm for 1 second from now. |
| //! alarm::set(1); |
| //! |
| //! // Pause the process until the alarm signal is received. |
| //! let mut sigset = SigSet::empty(); |
| //! sigset.add(Signal::SIGALRM); |
| //! sigset.wait(); |
| //! |
| //! assert!(start.elapsed() >= Duration::from_secs(1)); |
| //! ``` |
| //! |
| //! # References |
| //! |
| //! See also [alarm(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/alarm.html). |
| |
| /// Schedule an alarm signal. |
| /// |
| /// This will cause the system to generate a `SIGALRM` signal for the |
| /// process after the specified number of seconds have elapsed. |
| /// |
| /// Returns the leftover time of a previously set alarm if there was one. |
| </span><span class="kw">pub fn </span>set(secs: libc::c_uint) -> <span class="prelude-ty">Option</span><libc::c_uint> { |
| <span class="macro">assert!</span>(secs != <span class="number">0</span>, <span class="string">"passing 0 to `alarm::set` is not allowed, to cancel an alarm use `alarm::cancel`"</span>); |
| alarm(secs) |
| } |
| |
| <span class="doccomment">/// Cancel an previously set alarm signal. |
| /// |
| /// Returns the leftover time of a previously set alarm if there was one. |
| </span><span class="kw">pub fn </span>cancel() -> <span class="prelude-ty">Option</span><libc::c_uint> { |
| alarm(<span class="number">0</span>) |
| } |
| |
| <span class="kw">fn </span>alarm(secs: libc::c_uint) -> <span class="prelude-ty">Option</span><libc::c_uint> { |
| <span class="kw">match unsafe </span>{ libc::alarm(secs) } { |
| <span class="number">0 </span>=> <span class="prelude-val">None</span>, |
| secs => <span class="prelude-val">Some</span>(secs), |
| } |
| } |
| } |
| } |
| |
| <span class="doccomment">/// Suspend execution for an interval of time |
| /// |
| /// See also [sleep(2)](https://pubs.opengroup.org/onlinepubs/009695399/functions/sleep.html#tag_03_705_05) |
| </span><span class="comment">// Per POSIX, does not fail |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>sleep(seconds: c_uint) -> c_uint { |
| <span class="kw">unsafe </span>{ libc::sleep(seconds) } |
| } |
| |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![feature = <span class="string">"acct"</span>] |
| |
| #[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| </span><span class="kw">pub mod </span>acct { |
| <span class="kw">use crate</span>::{<span class="prelude-ty">Result</span>, NixPath}; |
| <span class="kw">use </span><span class="kw">crate</span>::errno::Errno; |
| <span class="kw">use </span>std::ptr; |
| |
| <span class="doccomment">/// Enable process accounting |
| /// |
| /// See also [acct(2)](https://linux.die.net/man/2/acct) |
| </span><span class="kw">pub fn </span>enable<P: <span class="question-mark">?</span>Sized + NixPath>(filename: <span class="kw-2">&</span>P) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = filename.with_nix_path(|cstr| { |
| <span class="kw">unsafe </span>{ libc::acct(cstr.as_ptr()) } |
| })<span class="question-mark">?</span>; |
| |
| Errno::result(res).map(drop) |
| } |
| |
| <span class="doccomment">/// Disable process accounting |
| </span><span class="kw">pub fn </span>disable() -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::acct(ptr::null()) }; |
| |
| Errno::result(res).map(drop) |
| } |
| } |
| } |
| |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![feature = <span class="string">"fs"</span>] |
| </span><span class="doccomment">/// Creates a regular file which persists even after process termination |
| /// |
| /// * `template`: a path whose 6 rightmost characters must be X, e.g. `/tmp/tmpfile_XXXXXX` |
| /// * returns: tuple of file descriptor and filename |
| /// |
| /// Err is returned either if no temporary filename could be created or the template doesn't |
| /// end with XXXXXX |
| /// |
| /// See also [mkstemp(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/mkstemp.html) |
| /// |
| /// # Example |
| /// |
| /// ```rust |
| /// use nix::unistd; |
| /// |
| /// let _ = match unistd::mkstemp("/tmp/tempfile_XXXXXX") { |
| /// Ok((fd, path)) => { |
| /// unistd::unlink(path.as_path()).unwrap(); // flag file to be deleted at app termination |
| /// fd |
| /// } |
| /// Err(e) => panic!("mkstemp failed: {}", e) |
| /// }; |
| /// // do something with fd |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>mkstemp<P: <span class="question-mark">?</span>Sized + NixPath>(template: <span class="kw-2">&</span>P) -> <span class="prelude-ty">Result</span><(RawFd, PathBuf)> { |
| <span class="kw">let </span><span class="kw-2">mut </span>path = template.with_nix_path(|path| {path.to_bytes_with_nul().to_owned()})<span class="question-mark">?</span>; |
| <span class="kw">let </span>p = path.as_mut_ptr() <span class="kw">as </span><span class="kw-2">*mut </span><span class="kw">_</span>; |
| <span class="kw">let </span>fd = <span class="kw">unsafe </span>{ libc::mkstemp(p) }; |
| <span class="kw">let </span>last = path.pop(); <span class="comment">// drop the trailing nul |
| </span><span class="macro">debug_assert!</span>(last == <span class="prelude-val">Some</span>(<span class="string">b'\0'</span>)); |
| <span class="kw">let </span>pathname = OsString::from_vec(path); |
| Errno::result(fd)<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>((fd, PathBuf::from(pathname))) |
| } |
| } |
| |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![all(feature = <span class="string">"fs"</span>, feature = <span class="string">"feature"</span>)] |
| |
| </span><span class="doccomment">/// Variable names for `pathconf` |
| /// |
| /// Nix uses the same naming convention for these variables as the |
| /// [getconf(1)](https://pubs.opengroup.org/onlinepubs/9699919799/utilities/getconf.html) utility. |
| /// That is, `PathconfVar` variables have the same name as the abstract |
| /// variables shown in the `pathconf(2)` man page. Usually, it's the same as |
| /// the C variable name without the leading `_PC_`. |
| /// |
| /// POSIX 1003.1-2008 standardizes all of these variables, but some OSes choose |
| /// not to implement variables that cannot change at runtime. |
| /// |
| /// # References |
| /// |
| /// - [pathconf(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/pathconf.html) |
| /// - [limits.h](https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/limits.h.html) |
| /// - [unistd.h](https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/unistd.h.html) |
| </span><span class="attribute">#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)] |
| #[repr(i32)] |
| #[non_exhaustive] |
| </span><span class="kw">pub enum </span>PathconfVar { |
| <span class="attribute">#[cfg(any(target_os = <span class="string">"dragonfly"</span>, target_os = <span class="string">"freebsd"</span>, target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"netbsd"</span>, target_os = <span class="string">"openbsd"</span>, target_os = <span class="string">"redox"</span>))] |
| </span><span class="doccomment">/// Minimum number of bits needed to represent, as a signed integer value, |
| /// the maximum size of a regular file allowed in the specified directory. |
| </span><span class="attribute">#[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>FILESIZEBITS = libc::_PC_FILESIZEBITS, |
| <span class="doccomment">/// Maximum number of links to a single file. |
| </span>LINK_MAX = libc::_PC_LINK_MAX, |
| <span class="doccomment">/// Maximum number of bytes in a terminal canonical input line. |
| </span>MAX_CANON = libc::_PC_MAX_CANON, |
| <span class="doccomment">/// Minimum number of bytes for which space is available in a terminal input |
| /// queue; therefore, the maximum number of bytes a conforming application |
| /// may require to be typed as input before reading them. |
| </span>MAX_INPUT = libc::_PC_MAX_INPUT, |
| <span class="doccomment">/// Maximum number of bytes in a filename (not including the terminating |
| /// null of a filename string). |
| </span>NAME_MAX = libc::_PC_NAME_MAX, |
| <span class="doccomment">/// Maximum number of bytes the implementation will store as a pathname in a |
| /// user-supplied buffer of unspecified size, including the terminating null |
| /// character. Minimum number the implementation will accept as the maximum |
| /// number of bytes in a pathname. |
| </span>PATH_MAX = libc::_PC_PATH_MAX, |
| <span class="doccomment">/// Maximum number of bytes that is guaranteed to be atomic when writing to |
| /// a pipe. |
| </span>PIPE_BUF = libc::_PC_PIPE_BUF, |
| <span class="attribute">#[cfg(any(target_os = <span class="string">"android"</span>, target_os = <span class="string">"dragonfly"</span>, target_os = <span class="string">"illumos"</span>, |
| target_os = <span class="string">"linux"</span>, target_os = <span class="string">"netbsd"</span>, target_os = <span class="string">"openbsd"</span>, |
| target_os = <span class="string">"redox"</span>, target_os = <span class="string">"solaris"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// Symbolic links can be created. |
| </span>POSIX2_SYMLINKS = libc::_PC_2_SYMLINKS, |
| <span class="attribute">#[cfg(any(target_os = <span class="string">"android"</span>, target_os = <span class="string">"dragonfly"</span>, target_os = <span class="string">"freebsd"</span>, |
| target_os = <span class="string">"linux"</span>, target_os = <span class="string">"openbsd"</span>, target_os = <span class="string">"redox"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// Minimum number of bytes of storage actually allocated for any portion of |
| /// a file. |
| </span>POSIX_ALLOC_SIZE_MIN = libc::_PC_ALLOC_SIZE_MIN, |
| <span class="attribute">#[cfg(any(target_os = <span class="string">"android"</span>, target_os = <span class="string">"dragonfly"</span>, target_os = <span class="string">"freebsd"</span>, |
| target_os = <span class="string">"linux"</span>, target_os = <span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// Recommended increment for file transfer sizes between the |
| /// `POSIX_REC_MIN_XFER_SIZE` and `POSIX_REC_MAX_XFER_SIZE` values. |
| </span>POSIX_REC_INCR_XFER_SIZE = libc::_PC_REC_INCR_XFER_SIZE, |
| <span class="attribute">#[cfg(any(target_os = <span class="string">"android"</span>, target_os = <span class="string">"dragonfly"</span>, target_os = <span class="string">"freebsd"</span>, |
| target_os = <span class="string">"linux"</span>, target_os = <span class="string">"openbsd"</span>, target_os = <span class="string">"redox"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// Maximum recommended file transfer size. |
| </span>POSIX_REC_MAX_XFER_SIZE = libc::_PC_REC_MAX_XFER_SIZE, |
| <span class="attribute">#[cfg(any(target_os = <span class="string">"android"</span>, target_os = <span class="string">"dragonfly"</span>, target_os = <span class="string">"freebsd"</span>, |
| target_os = <span class="string">"linux"</span>, target_os = <span class="string">"openbsd"</span>, target_os = <span class="string">"redox"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// Minimum recommended file transfer size. |
| </span>POSIX_REC_MIN_XFER_SIZE = libc::_PC_REC_MIN_XFER_SIZE, |
| <span class="attribute">#[cfg(any(target_os = <span class="string">"android"</span>, target_os = <span class="string">"dragonfly"</span>, target_os = <span class="string">"freebsd"</span>, |
| target_os = <span class="string">"linux"</span>, target_os = <span class="string">"openbsd"</span>, target_os = <span class="string">"redox"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// Recommended file transfer buffer alignment. |
| </span>POSIX_REC_XFER_ALIGN = libc::_PC_REC_XFER_ALIGN, |
| <span class="attribute">#[cfg(any(target_os = <span class="string">"android"</span>, target_os = <span class="string">"dragonfly"</span>, target_os = <span class="string">"freebsd"</span>, |
| target_os = <span class="string">"illumos"</span>, target_os = <span class="string">"linux"</span>, target_os = <span class="string">"netbsd"</span>, |
| target_os = <span class="string">"openbsd"</span>, target_os = <span class="string">"redox"</span>, target_os = <span class="string">"solaris"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// Maximum number of bytes in a symbolic link. |
| </span>SYMLINK_MAX = libc::_PC_SYMLINK_MAX, |
| <span class="doccomment">/// The use of `chown` and `fchown` is restricted to a process with |
| /// appropriate privileges, and to changing the group ID of a file only to |
| /// the effective group ID of the process or to one of its supplementary |
| /// group IDs. |
| </span>_POSIX_CHOWN_RESTRICTED = libc::_PC_CHOWN_RESTRICTED, |
| <span class="doccomment">/// Pathname components longer than {NAME_MAX} generate an error. |
| </span>_POSIX_NO_TRUNC = libc::_PC_NO_TRUNC, |
| <span class="doccomment">/// This symbol shall be defined to be the value of a character that shall |
| /// disable terminal special character handling. |
| </span>_POSIX_VDISABLE = libc::_PC_VDISABLE, |
| <span class="attribute">#[cfg(any(target_os = <span class="string">"android"</span>, target_os = <span class="string">"dragonfly"</span>, target_os = <span class="string">"freebsd"</span>, |
| target_os = <span class="string">"illumos"</span>, target_os = <span class="string">"linux"</span>, target_os = <span class="string">"openbsd"</span>, |
| target_os = <span class="string">"redox"</span>, target_os = <span class="string">"solaris"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// Asynchronous input or output operations may be performed for the |
| /// associated file. |
| </span>_POSIX_ASYNC_IO = libc::_PC_ASYNC_IO, |
| <span class="attribute">#[cfg(any(target_os = <span class="string">"android"</span>, target_os = <span class="string">"dragonfly"</span>, target_os = <span class="string">"freebsd"</span>, |
| target_os = <span class="string">"illumos"</span>, target_os = <span class="string">"linux"</span>, target_os = <span class="string">"openbsd"</span>, |
| target_os = <span class="string">"redox"</span>, target_os = <span class="string">"solaris"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// Prioritized input or output operations may be performed for the |
| /// associated file. |
| </span>_POSIX_PRIO_IO = libc::_PC_PRIO_IO, |
| <span class="attribute">#[cfg(any(target_os = <span class="string">"android"</span>, target_os = <span class="string">"dragonfly"</span>, target_os = <span class="string">"freebsd"</span>, |
| target_os = <span class="string">"illumos"</span>, target_os = <span class="string">"linux"</span>, target_os = <span class="string">"netbsd"</span>, |
| target_os = <span class="string">"openbsd"</span>, target_os = <span class="string">"redox"</span>, target_os = <span class="string">"solaris"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// Synchronized input or output operations may be performed for the |
| /// associated file. |
| </span>_POSIX_SYNC_IO = libc::_PC_SYNC_IO, |
| <span class="attribute">#[cfg(any(target_os = <span class="string">"dragonfly"</span>, target_os = <span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The resolution in nanoseconds for all file timestamps. |
| </span>_POSIX_TIMESTAMP_RESOLUTION = libc::_PC_TIMESTAMP_RESOLUTION |
| } |
| |
| <span class="doccomment">/// Like `pathconf`, but works with file descriptors instead of paths (see |
| /// [fpathconf(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/pathconf.html)) |
| /// |
| /// # Parameters |
| /// |
| /// - `fd`: The file descriptor whose variable should be interrogated |
| /// - `var`: The pathconf variable to lookup |
| /// |
| /// # Returns |
| /// |
| /// - `Ok(Some(x))`: the variable's limit (for limit variables) or its |
| /// implementation level (for option variables). Implementation levels are |
| /// usually a decimal-coded date, such as 200112 for POSIX 2001.12 |
| /// - `Ok(None)`: the variable has no limit (for limit variables) or is |
| /// unsupported (for option variables) |
| /// - `Err(x)`: an error occurred |
| </span><span class="kw">pub fn </span>fpathconf(fd: RawFd, var: PathconfVar) -> <span class="prelude-ty">Result</span><<span class="prelude-ty">Option</span><c_long>> { |
| <span class="kw">let </span>raw = <span class="kw">unsafe </span>{ |
| Errno::clear(); |
| libc::fpathconf(fd, var <span class="kw">as </span>c_int) |
| }; |
| <span class="kw">if </span>raw == -<span class="number">1 </span>{ |
| <span class="kw">if </span>errno::errno() == <span class="number">0 </span>{ |
| <span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">Err</span>(Errno::last()) |
| } |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>(raw)) |
| } |
| } |
| |
| <span class="doccomment">/// Get path-dependent configurable system variables (see |
| /// [pathconf(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/pathconf.html)) |
| /// |
| /// Returns the value of a path-dependent configurable system variable. Most |
| /// supported variables also have associated compile-time constants, but POSIX |
| /// allows their values to change at runtime. There are generally two types of |
| /// `pathconf` variables: options and limits. See [pathconf(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/pathconf.html) for more details. |
| /// |
| /// # Parameters |
| /// |
| /// - `path`: Lookup the value of `var` for this file or directory |
| /// - `var`: The `pathconf` variable to lookup |
| /// |
| /// # Returns |
| /// |
| /// - `Ok(Some(x))`: the variable's limit (for limit variables) or its |
| /// implementation level (for option variables). Implementation levels are |
| /// usually a decimal-coded date, such as 200112 for POSIX 2001.12 |
| /// - `Ok(None)`: the variable has no limit (for limit variables) or is |
| /// unsupported (for option variables) |
| /// - `Err(x)`: an error occurred |
| </span><span class="kw">pub fn </span>pathconf<P: <span class="question-mark">?</span>Sized + NixPath>(path: <span class="kw-2">&</span>P, var: PathconfVar) -> <span class="prelude-ty">Result</span><<span class="prelude-ty">Option</span><c_long>> { |
| <span class="kw">let </span>raw = path.with_nix_path(|cstr| { |
| <span class="kw">unsafe </span>{ |
| Errno::clear(); |
| libc::pathconf(cstr.as_ptr(), var <span class="kw">as </span>c_int) |
| } |
| })<span class="question-mark">?</span>; |
| <span class="kw">if </span>raw == -<span class="number">1 </span>{ |
| <span class="kw">if </span>errno::errno() == <span class="number">0 </span>{ |
| <span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">Err</span>(Errno::last()) |
| } |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>(raw)) |
| } |
| } |
| } |
| |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![feature = <span class="string">"feature"</span>] |
| |
| </span><span class="doccomment">/// Variable names for `sysconf` |
| /// |
| /// Nix uses the same naming convention for these variables as the |
| /// [getconf(1)](https://pubs.opengroup.org/onlinepubs/9699919799/utilities/getconf.html) utility. |
| /// That is, `SysconfVar` variables have the same name as the abstract variables |
| /// shown in the `sysconf(3)` man page. Usually, it's the same as the C |
| /// variable name without the leading `_SC_`. |
| /// |
| /// All of these symbols are standardized by POSIX 1003.1-2008, but haven't been |
| /// implemented by all platforms. |
| /// |
| /// # References |
| /// |
| /// - [sysconf(3)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/sysconf.html) |
| /// - [unistd.h](https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/unistd.h.html) |
| /// - [limits.h](https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/limits.h.html) |
| </span><span class="attribute">#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)] |
| #[repr(i32)] |
| #[non_exhaustive] |
| </span><span class="kw">pub enum </span>SysconfVar { |
| <span class="doccomment">/// Maximum number of I/O operations in a single list I/O call supported by |
| /// the implementation. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>AIO_LISTIO_MAX = libc::_SC_AIO_LISTIO_MAX, |
| <span class="doccomment">/// Maximum number of outstanding asynchronous I/O operations supported by |
| /// the implementation. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>AIO_MAX = libc::_SC_AIO_MAX, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"android"</span>, target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, |
| target_os = <span class="string">"ios"</span>, target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, |
| target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The maximum amount by which a process can decrease its asynchronous I/O |
| /// priority level from its own scheduling priority. |
| </span>AIO_PRIO_DELTA_MAX = libc::_SC_AIO_PRIO_DELTA_MAX, |
| <span class="doccomment">/// Maximum length of argument to the exec functions including environment data. |
| </span>ARG_MAX = libc::_SC_ARG_MAX, |
| <span class="doccomment">/// Maximum number of functions that may be registered with `atexit`. |
| </span><span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>ATEXIT_MAX = libc::_SC_ATEXIT_MAX, |
| <span class="doccomment">/// Maximum obase values allowed by the bc utility. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>BC_BASE_MAX = libc::_SC_BC_BASE_MAX, |
| <span class="doccomment">/// Maximum number of elements permitted in an array by the bc utility. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>BC_DIM_MAX = libc::_SC_BC_DIM_MAX, |
| <span class="doccomment">/// Maximum scale value allowed by the bc utility. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>BC_SCALE_MAX = libc::_SC_BC_SCALE_MAX, |
| <span class="doccomment">/// Maximum length of a string constant accepted by the bc utility. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>BC_STRING_MAX = libc::_SC_BC_STRING_MAX, |
| <span class="doccomment">/// Maximum number of simultaneous processes per real user ID. |
| </span>CHILD_MAX = libc::_SC_CHILD_MAX, |
| <span class="comment">// The number of clock ticks per second. |
| </span>CLK_TCK = libc::_SC_CLK_TCK, |
| <span class="doccomment">/// Maximum number of weights that can be assigned to an entry of the |
| /// LC_COLLATE order keyword in the locale definition file |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>COLL_WEIGHTS_MAX = libc::_SC_COLL_WEIGHTS_MAX, |
| <span class="doccomment">/// Maximum number of timer expiration overruns. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>DELAYTIMER_MAX = libc::_SC_DELAYTIMER_MAX, |
| <span class="doccomment">/// Maximum number of expressions that can be nested within parentheses by |
| /// the expr utility. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>EXPR_NEST_MAX = libc::_SC_EXPR_NEST_MAX, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"illumos"</span>, |
| target_os = <span class="string">"ios"</span>, target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, |
| target_os=<span class="string">"netbsd"</span>, target_os=<span class="string">"openbsd"</span>, target_os = <span class="string">"solaris"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// Maximum length of a host name (not including the terminating null) as |
| /// returned from the `gethostname` function |
| </span>HOST_NAME_MAX = libc::_SC_HOST_NAME_MAX, |
| <span class="doccomment">/// Maximum number of iovec structures that one process has available for |
| /// use with `readv` or `writev`. |
| </span><span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>IOV_MAX = libc::_SC_IOV_MAX, |
| <span class="doccomment">/// Unless otherwise noted, the maximum length, in bytes, of a utility's |
| /// input line (either standard input or another file), when the utility is |
| /// described as processing text files. The length includes room for the |
| /// trailing newline. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>LINE_MAX = libc::_SC_LINE_MAX, |
| <span class="doccomment">/// Maximum length of a login name. |
| </span><span class="attribute">#[cfg(not(target_os = <span class="string">"haiku"</span>))] |
| </span>LOGIN_NAME_MAX = libc::_SC_LOGIN_NAME_MAX, |
| <span class="doccomment">/// Maximum number of simultaneous supplementary group IDs per process. |
| </span>NGROUPS_MAX = libc::_SC_NGROUPS_MAX, |
| <span class="doccomment">/// Initial size of `getgrgid_r` and `getgrnam_r` data buffers |
| </span><span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>GETGR_R_SIZE_MAX = libc::_SC_GETGR_R_SIZE_MAX, |
| <span class="doccomment">/// Initial size of `getpwuid_r` and `getpwnam_r` data buffers |
| </span><span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>GETPW_R_SIZE_MAX = libc::_SC_GETPW_R_SIZE_MAX, |
| <span class="doccomment">/// The maximum number of open message queue descriptors a process may hold. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>MQ_OPEN_MAX = libc::_SC_MQ_OPEN_MAX, |
| <span class="doccomment">/// The maximum number of message priorities supported by the implementation. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>MQ_PRIO_MAX = libc::_SC_MQ_PRIO_MAX, |
| <span class="doccomment">/// A value one greater than the maximum value that the system may assign to |
| /// a newly-created file descriptor. |
| </span>OPEN_MAX = libc::_SC_OPEN_MAX, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"ios"</span>, |
| target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports the Advisory Information option. |
| </span>_POSIX_ADVISORY_INFO = libc::_SC_ADVISORY_INFO, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"illumos"</span>, |
| target_os = <span class="string">"ios"</span>, target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, |
| target_os=<span class="string">"netbsd"</span>, target_os=<span class="string">"openbsd"</span>, target_os = <span class="string">"solaris"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports barriers. |
| </span>_POSIX_BARRIERS = libc::_SC_BARRIERS, |
| <span class="doccomment">/// The implementation supports asynchronous input and output. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX_ASYNCHRONOUS_IO = libc::_SC_ASYNCHRONOUS_IO, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"illumos"</span>, |
| target_os = <span class="string">"ios"</span>, target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, |
| target_os=<span class="string">"netbsd"</span>, target_os=<span class="string">"openbsd"</span>, target_os = <span class="string">"solaris"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports clock selection. |
| </span>_POSIX_CLOCK_SELECTION = libc::_SC_CLOCK_SELECTION, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"illumos"</span>, |
| target_os = <span class="string">"ios"</span>, target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, |
| target_os=<span class="string">"netbsd"</span>, target_os=<span class="string">"openbsd"</span>, target_os = <span class="string">"solaris"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports the Process CPU-Time Clocks option. |
| </span>_POSIX_CPUTIME = libc::_SC_CPUTIME, |
| <span class="doccomment">/// The implementation supports the File Synchronization option. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX_FSYNC = libc::_SC_FSYNC, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"illumos"</span>, |
| target_os = <span class="string">"ios"</span>, target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, |
| target_os=<span class="string">"openbsd"</span>, target_os = <span class="string">"solaris"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports the IPv6 option. |
| </span>_POSIX_IPV6 = libc::_SC_IPV6, |
| <span class="doccomment">/// The implementation supports job control. |
| </span><span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX_JOB_CONTROL = libc::_SC_JOB_CONTROL, |
| <span class="doccomment">/// The implementation supports memory mapped Files. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX_MAPPED_FILES = libc::_SC_MAPPED_FILES, |
| <span class="doccomment">/// The implementation supports the Process Memory Locking option. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX_MEMLOCK = libc::_SC_MEMLOCK, |
| <span class="doccomment">/// The implementation supports the Range Memory Locking option. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX_MEMLOCK_RANGE = libc::_SC_MEMLOCK_RANGE, |
| <span class="doccomment">/// The implementation supports memory protection. |
| </span><span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX_MEMORY_PROTECTION = libc::_SC_MEMORY_PROTECTION, |
| <span class="doccomment">/// The implementation supports the Message Passing option. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX_MESSAGE_PASSING = libc::_SC_MESSAGE_PASSING, |
| <span class="doccomment">/// The implementation supports the Monotonic Clock option. |
| </span><span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX_MONOTONIC_CLOCK = libc::_SC_MONOTONIC_CLOCK, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"android"</span>, target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, |
| target_os = <span class="string">"illumos"</span>, target_os = <span class="string">"ios"</span>, target_os=<span class="string">"linux"</span>, |
| target_os = <span class="string">"macos"</span>, target_os=<span class="string">"openbsd"</span>, target_os = <span class="string">"solaris"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports the Prioritized Input and Output option. |
| </span>_POSIX_PRIORITIZED_IO = libc::_SC_PRIORITIZED_IO, |
| <span class="doccomment">/// The implementation supports the Process Scheduling option. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX_PRIORITY_SCHEDULING = libc::_SC_PRIORITY_SCHEDULING, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"illumos"</span>, |
| target_os = <span class="string">"ios"</span>, target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, |
| target_os=<span class="string">"openbsd"</span>, target_os = <span class="string">"solaris"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports the Raw Sockets option. |
| </span>_POSIX_RAW_SOCKETS = libc::_SC_RAW_SOCKETS, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"illumos"</span>, |
| target_os = <span class="string">"ios"</span>, target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, |
| target_os=<span class="string">"netbsd"</span>, target_os=<span class="string">"openbsd"</span>, target_os = <span class="string">"solaris"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports read-write locks. |
| </span>_POSIX_READER_WRITER_LOCKS = libc::_SC_READER_WRITER_LOCKS, |
| <span class="attribute">#[cfg(any(target_os = <span class="string">"android"</span>, target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, |
| target_os = <span class="string">"ios"</span>, target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, |
| target_os = <span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports realtime signals. |
| </span>_POSIX_REALTIME_SIGNALS = libc::_SC_REALTIME_SIGNALS, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"illumos"</span>, |
| target_os = <span class="string">"ios"</span>, target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, |
| target_os=<span class="string">"netbsd"</span>, target_os=<span class="string">"openbsd"</span>, target_os = <span class="string">"solaris"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports the Regular Expression Handling option. |
| </span>_POSIX_REGEXP = libc::_SC_REGEXP, |
| <span class="doccomment">/// Each process has a saved set-user-ID and a saved set-group-ID. |
| </span><span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX_SAVED_IDS = libc::_SC_SAVED_IDS, |
| <span class="doccomment">/// The implementation supports semaphores. |
| </span><span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX_SEMAPHORES = libc::_SC_SEMAPHORES, |
| <span class="doccomment">/// The implementation supports the Shared Memory Objects option. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX_SHARED_MEMORY_OBJECTS = libc::_SC_SHARED_MEMORY_OBJECTS, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"ios"</span>, |
| target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, target_os=<span class="string">"netbsd"</span>, |
| target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports the POSIX shell. |
| </span>_POSIX_SHELL = libc::_SC_SHELL, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"ios"</span>, |
| target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, target_os=<span class="string">"netbsd"</span>, |
| target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports the Spawn option. |
| </span>_POSIX_SPAWN = libc::_SC_SPAWN, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"ios"</span>, |
| target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, target_os=<span class="string">"netbsd"</span>, |
| target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports spin locks. |
| </span>_POSIX_SPIN_LOCKS = libc::_SC_SPIN_LOCKS, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"ios"</span>, |
| target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports the Process Sporadic Server option. |
| </span>_POSIX_SPORADIC_SERVER = libc::_SC_SPORADIC_SERVER, |
| <span class="attribute">#[cfg(any(target_os = <span class="string">"ios"</span>, target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, |
| target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX_SS_REPL_MAX = libc::_SC_SS_REPL_MAX, |
| <span class="doccomment">/// The implementation supports the Synchronized Input and Output option. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX_SYNCHRONIZED_IO = libc::_SC_SYNCHRONIZED_IO, |
| <span class="doccomment">/// The implementation supports the Thread Stack Address Attribute option. |
| </span><span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX_THREAD_ATTR_STACKADDR = libc::_SC_THREAD_ATTR_STACKADDR, |
| <span class="doccomment">/// The implementation supports the Thread Stack Size Attribute option. |
| </span><span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX_THREAD_ATTR_STACKSIZE = libc::_SC_THREAD_ATTR_STACKSIZE, |
| <span class="attribute">#[cfg(any(target_os = <span class="string">"ios"</span>, target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, |
| target_os=<span class="string">"netbsd"</span>, target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports the Thread CPU-Time Clocks option. |
| </span>_POSIX_THREAD_CPUTIME = libc::_SC_THREAD_CPUTIME, |
| <span class="doccomment">/// The implementation supports the Non-Robust Mutex Priority Inheritance |
| /// option. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX_THREAD_PRIO_INHERIT = libc::_SC_THREAD_PRIO_INHERIT, |
| <span class="doccomment">/// The implementation supports the Non-Robust Mutex Priority Protection option. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX_THREAD_PRIO_PROTECT = libc::_SC_THREAD_PRIO_PROTECT, |
| <span class="doccomment">/// The implementation supports the Thread Execution Scheduling option. |
| </span><span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX_THREAD_PRIORITY_SCHEDULING = libc::_SC_THREAD_PRIORITY_SCHEDULING, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"ios"</span>, |
| target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, target_os=<span class="string">"netbsd"</span>, |
| target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports the Thread Process-Shared Synchronization |
| /// option. |
| </span>_POSIX_THREAD_PROCESS_SHARED = libc::_SC_THREAD_PROCESS_SHARED, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"linux"</span>, target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports the Robust Mutex Priority Inheritance option. |
| </span>_POSIX_THREAD_ROBUST_PRIO_INHERIT = libc::_SC_THREAD_ROBUST_PRIO_INHERIT, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"linux"</span>, target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports the Robust Mutex Priority Protection option. |
| </span>_POSIX_THREAD_ROBUST_PRIO_PROTECT = libc::_SC_THREAD_ROBUST_PRIO_PROTECT, |
| <span class="doccomment">/// The implementation supports thread-safe functions. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX_THREAD_SAFE_FUNCTIONS = libc::_SC_THREAD_SAFE_FUNCTIONS, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"ios"</span>, |
| target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports the Thread Sporadic Server option. |
| </span>_POSIX_THREAD_SPORADIC_SERVER = libc::_SC_THREAD_SPORADIC_SERVER, |
| <span class="doccomment">/// The implementation supports threads. |
| </span><span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX_THREADS = libc::_SC_THREADS, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"ios"</span>, |
| target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports timeouts. |
| </span>_POSIX_TIMEOUTS = libc::_SC_TIMEOUTS, |
| <span class="doccomment">/// The implementation supports timers. |
| </span><span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX_TIMERS = libc::_SC_TIMERS, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"ios"</span>, |
| target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports the Trace option. |
| </span>_POSIX_TRACE = libc::_SC_TRACE, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"ios"</span>, |
| target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports the Trace Event Filter option. |
| </span>_POSIX_TRACE_EVENT_FILTER = libc::_SC_TRACE_EVENT_FILTER, |
| <span class="attribute">#[cfg(any(target_os = <span class="string">"ios"</span>, target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, |
| target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX_TRACE_EVENT_NAME_MAX = libc::_SC_TRACE_EVENT_NAME_MAX, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"ios"</span>, |
| target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports the Trace Inherit option. |
| </span>_POSIX_TRACE_INHERIT = libc::_SC_TRACE_INHERIT, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"ios"</span>, |
| target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports the Trace Log option. |
| </span>_POSIX_TRACE_LOG = libc::_SC_TRACE_LOG, |
| <span class="attribute">#[cfg(any(target_os = <span class="string">"ios"</span>, target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, |
| target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX_TRACE_NAME_MAX = libc::_SC_TRACE_NAME_MAX, |
| <span class="attribute">#[cfg(any(target_os = <span class="string">"ios"</span>, target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, |
| target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX_TRACE_SYS_MAX = libc::_SC_TRACE_SYS_MAX, |
| <span class="attribute">#[cfg(any(target_os = <span class="string">"ios"</span>, target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, |
| target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX_TRACE_USER_EVENT_MAX = libc::_SC_TRACE_USER_EVENT_MAX, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"ios"</span>, |
| target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports the Typed Memory Objects option. |
| </span>_POSIX_TYPED_MEMORY_OBJECTS = libc::_SC_TYPED_MEMORY_OBJECTS, |
| <span class="doccomment">/// Integer value indicating version of this standard (C-language binding) |
| /// to which the implementation conforms. For implementations conforming to |
| /// POSIX.1-2008, the value shall be 200809L. |
| </span>_POSIX_VERSION = libc::_SC_VERSION, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"ios"</span>, |
| target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, target_os=<span class="string">"netbsd"</span>, |
| target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation provides a C-language compilation environment with |
| /// 32-bit `int`, `long`, `pointer`, and `off_t` types. |
| </span>_POSIX_V6_ILP32_OFF32 = libc::_SC_V6_ILP32_OFF32, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"ios"</span>, |
| target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, target_os=<span class="string">"netbsd"</span>, |
| target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation provides a C-language compilation environment with |
| /// 32-bit `int`, `long`, and pointer types and an `off_t` type using at |
| /// least 64 bits. |
| </span>_POSIX_V6_ILP32_OFFBIG = libc::_SC_V6_ILP32_OFFBIG, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"ios"</span>, |
| target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, target_os=<span class="string">"netbsd"</span>, |
| target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation provides a C-language compilation environment with |
| /// 32-bit `int` and 64-bit `long`, `pointer`, and `off_t` types. |
| </span>_POSIX_V6_LP64_OFF64 = libc::_SC_V6_LP64_OFF64, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"ios"</span>, |
| target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, target_os=<span class="string">"netbsd"</span>, |
| target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation provides a C-language compilation environment with an |
| /// `int` type using at least 32 bits and `long`, pointer, and `off_t` types |
| /// using at least 64 bits. |
| </span>_POSIX_V6_LPBIG_OFFBIG = libc::_SC_V6_LPBIG_OFFBIG, |
| <span class="doccomment">/// The implementation supports the C-Language Binding option. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX2_C_BIND = libc::_SC_2_C_BIND, |
| <span class="doccomment">/// The implementation supports the C-Language Development Utilities option. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX2_C_DEV = libc::_SC_2_C_DEV, |
| <span class="doccomment">/// The implementation supports the Terminal Characteristics option. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX2_CHAR_TERM = libc::_SC_2_CHAR_TERM, |
| <span class="doccomment">/// The implementation supports the FORTRAN Development Utilities option. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX2_FORT_DEV = libc::_SC_2_FORT_DEV, |
| <span class="doccomment">/// The implementation supports the FORTRAN Runtime Utilities option. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX2_FORT_RUN = libc::_SC_2_FORT_RUN, |
| <span class="doccomment">/// The implementation supports the creation of locales by the localedef |
| /// utility. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX2_LOCALEDEF = libc::_SC_2_LOCALEDEF, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"ios"</span>, |
| target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, target_os=<span class="string">"netbsd"</span>, |
| target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports the Batch Environment Services and Utilities |
| /// option. |
| </span>_POSIX2_PBS = libc::_SC_2_PBS, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"ios"</span>, |
| target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, target_os=<span class="string">"netbsd"</span>, |
| target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports the Batch Accounting option. |
| </span>_POSIX2_PBS_ACCOUNTING = libc::_SC_2_PBS_ACCOUNTING, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"ios"</span>, |
| target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, target_os=<span class="string">"netbsd"</span>, |
| target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports the Batch Checkpoint/Restart option. |
| </span>_POSIX2_PBS_CHECKPOINT = libc::_SC_2_PBS_CHECKPOINT, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"ios"</span>, |
| target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, target_os=<span class="string">"netbsd"</span>, |
| target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports the Locate Batch Job Request option. |
| </span>_POSIX2_PBS_LOCATE = libc::_SC_2_PBS_LOCATE, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"ios"</span>, |
| target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, target_os=<span class="string">"netbsd"</span>, |
| target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports the Batch Job Message Request option. |
| </span>_POSIX2_PBS_MESSAGE = libc::_SC_2_PBS_MESSAGE, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"ios"</span>, |
| target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, target_os=<span class="string">"netbsd"</span>, |
| target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports the Track Batch Job Request option. |
| </span>_POSIX2_PBS_TRACK = libc::_SC_2_PBS_TRACK, |
| <span class="doccomment">/// The implementation supports the Software Development Utilities option. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX2_SW_DEV = libc::_SC_2_SW_DEV, |
| <span class="doccomment">/// The implementation supports the User Portability Utilities option. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX2_UPE = libc::_SC_2_UPE, |
| <span class="doccomment">/// Integer value indicating version of the Shell and Utilities volume of |
| /// POSIX.1 to which the implementation conforms. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_POSIX2_VERSION = libc::_SC_2_VERSION, |
| <span class="doccomment">/// The size of a system page in bytes. |
| /// |
| /// POSIX also defines an alias named `PAGESIZE`, but Rust does not allow two |
| /// enum constants to have the same value, so nix omits `PAGESIZE`. |
| </span>PAGE_SIZE = libc::_SC_PAGE_SIZE, |
| <span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>PTHREAD_DESTRUCTOR_ITERATIONS = libc::_SC_THREAD_DESTRUCTOR_ITERATIONS, |
| <span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>PTHREAD_KEYS_MAX = libc::_SC_THREAD_KEYS_MAX, |
| <span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>PTHREAD_STACK_MIN = libc::_SC_THREAD_STACK_MIN, |
| <span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>PTHREAD_THREADS_MAX = libc::_SC_THREAD_THREADS_MAX, |
| <span class="attribute">#[cfg(not(target_os = <span class="string">"haiku"</span>))] |
| </span>RE_DUP_MAX = libc::_SC_RE_DUP_MAX, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"android"</span>, target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, |
| target_os = <span class="string">"ios"</span>, target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, |
| target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>RTSIG_MAX = libc::_SC_RTSIG_MAX, |
| <span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>SEM_NSEMS_MAX = libc::_SC_SEM_NSEMS_MAX, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"android"</span>, target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, |
| target_os = <span class="string">"ios"</span>, target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, |
| target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>SEM_VALUE_MAX = libc::_SC_SEM_VALUE_MAX, |
| <span class="attribute">#[cfg(any(target_os = <span class="string">"android"</span>, target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, |
| target_os = <span class="string">"ios"</span>, target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, |
| target_os = <span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>SIGQUEUE_MAX = libc::_SC_SIGQUEUE_MAX, |
| STREAM_MAX = libc::_SC_STREAM_MAX, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"ios"</span>, |
| target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, target_os=<span class="string">"netbsd"</span>, |
| target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>SYMLOOP_MAX = libc::_SC_SYMLOOP_MAX, |
| <span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>TIMER_MAX = libc::_SC_TIMER_MAX, |
| TTY_NAME_MAX = libc::_SC_TTY_NAME_MAX, |
| TZNAME_MAX = libc::_SC_TZNAME_MAX, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"android"</span>, target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, |
| target_os = <span class="string">"ios"</span>, target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, |
| target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports the X/Open Encryption Option Group. |
| </span>_XOPEN_CRYPT = libc::_SC_XOPEN_CRYPT, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"android"</span>, target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, |
| target_os = <span class="string">"ios"</span>, target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, |
| target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports the Issue 4, Version 2 Enhanced |
| /// Internationalization Option Group. |
| </span>_XOPEN_ENH_I18N = libc::_SC_XOPEN_ENH_I18N, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"android"</span>, target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, |
| target_os = <span class="string">"ios"</span>, target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, |
| target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_XOPEN_LEGACY = libc::_SC_XOPEN_LEGACY, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"android"</span>, target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, |
| target_os = <span class="string">"ios"</span>, target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, |
| target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports the X/Open Realtime Option Group. |
| </span>_XOPEN_REALTIME = libc::_SC_XOPEN_REALTIME, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"android"</span>, target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, |
| target_os = <span class="string">"ios"</span>, target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, |
| target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports the X/Open Realtime Threads Option Group. |
| </span>_XOPEN_REALTIME_THREADS = libc::_SC_XOPEN_REALTIME_THREADS, |
| <span class="doccomment">/// The implementation supports the Issue 4, Version 2 Shared Memory Option |
| /// Group. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>_XOPEN_SHM = libc::_SC_XOPEN_SHM, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, target_os = <span class="string">"ios"</span>, |
| target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports the XSI STREAMS Option Group. |
| </span>_XOPEN_STREAMS = libc::_SC_XOPEN_STREAMS, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"android"</span>, target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, |
| target_os = <span class="string">"ios"</span>, target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, |
| target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// The implementation supports the XSI option |
| </span>_XOPEN_UNIX = libc::_SC_XOPEN_UNIX, |
| <span class="attribute">#[cfg(any(target_os=<span class="string">"android"</span>, target_os=<span class="string">"dragonfly"</span>, target_os=<span class="string">"freebsd"</span>, |
| target_os = <span class="string">"ios"</span>, target_os=<span class="string">"linux"</span>, target_os = <span class="string">"macos"</span>, |
| target_os=<span class="string">"openbsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// Integer value indicating version of the X/Open Portability Guide to |
| /// which the implementation conforms. |
| </span>_XOPEN_VERSION = libc::_SC_XOPEN_VERSION, |
| <span class="doccomment">/// The number of pages of physical memory. Note that it is possible for |
| /// the product of this value to overflow. |
| </span><span class="attribute">#[cfg(any(target_os=<span class="string">"android"</span>, target_os=<span class="string">"linux"</span>))] |
| </span>_PHYS_PAGES = libc::_SC_PHYS_PAGES, |
| <span class="doccomment">/// The number of currently available pages of physical memory. |
| </span><span class="attribute">#[cfg(any(target_os=<span class="string">"android"</span>, target_os=<span class="string">"linux"</span>))] |
| </span>_AVPHYS_PAGES = libc::_SC_AVPHYS_PAGES, |
| <span class="doccomment">/// The number of processors configured. |
| </span><span class="attribute">#[cfg(any(target_os=<span class="string">"android"</span>, target_os=<span class="string">"linux"</span>))] |
| </span>_NPROCESSORS_CONF = libc::_SC_NPROCESSORS_CONF, |
| <span class="doccomment">/// The number of processors currently online (available). |
| </span><span class="attribute">#[cfg(any(target_os=<span class="string">"android"</span>, target_os=<span class="string">"linux"</span>))] |
| </span>_NPROCESSORS_ONLN = libc::_SC_NPROCESSORS_ONLN, |
| } |
| |
| <span class="doccomment">/// Get configurable system variables (see |
| /// [sysconf(3)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/sysconf.html)) |
| /// |
| /// Returns the value of a configurable system variable. Most supported |
| /// variables also have associated compile-time constants, but POSIX |
| /// allows their values to change at runtime. There are generally two types of |
| /// sysconf variables: options and limits. See sysconf(3) for more details. |
| /// |
| /// # Returns |
| /// |
| /// - `Ok(Some(x))`: the variable's limit (for limit variables) or its |
| /// implementation level (for option variables). Implementation levels are |
| /// usually a decimal-coded date, such as 200112 for POSIX 2001.12 |
| /// - `Ok(None)`: the variable has no limit (for limit variables) or is |
| /// unsupported (for option variables) |
| /// - `Err(x)`: an error occurred |
| </span><span class="kw">pub fn </span>sysconf(var: SysconfVar) -> <span class="prelude-ty">Result</span><<span class="prelude-ty">Option</span><c_long>> { |
| <span class="kw">let </span>raw = <span class="kw">unsafe </span>{ |
| Errno::clear(); |
| libc::sysconf(var <span class="kw">as </span>c_int) |
| }; |
| <span class="kw">if </span>raw == -<span class="number">1 </span>{ |
| <span class="kw">if </span>errno::errno() == <span class="number">0 </span>{ |
| <span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">Err</span>(Errno::last()) |
| } |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>(raw)) |
| } |
| } |
| } |
| |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![feature = <span class="string">"fs"</span>] |
| |
| #[cfg(any(target_os = <span class="string">"android"</span>, target_os = <span class="string">"linux"</span>))] |
| </span><span class="kw">mod </span>pivot_root { |
| <span class="kw">use crate</span>::{<span class="prelude-ty">Result</span>, NixPath}; |
| <span class="kw">use </span><span class="kw">crate</span>::errno::Errno; |
| |
| <span class="kw">pub fn </span>pivot_root<P1: <span class="question-mark">?</span>Sized + NixPath, P2: <span class="question-mark">?</span>Sized + NixPath>( |
| new_root: <span class="kw-2">&</span>P1, put_old: <span class="kw-2">&</span>P2) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = new_root.with_nix_path(|new_root| { |
| put_old.with_nix_path(|put_old| { |
| <span class="kw">unsafe </span>{ |
| libc::syscall(libc::SYS_pivot_root, new_root.as_ptr(), put_old.as_ptr()) |
| } |
| }) |
| })<span class="question-mark">??</span>; |
| |
| Errno::result(res).map(drop) |
| } |
| } |
| } |
| |
| <span class="attribute">#[cfg(any( |
| target_os = <span class="string">"android"</span>, |
| target_os = <span class="string">"dragonfly"</span>, |
| target_os = <span class="string">"freebsd"</span>, |
| target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"openbsd" |
| </span>))] |
| </span><span class="kw">mod </span>setres { |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![feature = <span class="string">"user"</span>] |
| |
| </span><span class="kw">use </span><span class="kw">crate</span>::Result; |
| <span class="kw">use </span><span class="kw">crate</span>::errno::Errno; |
| <span class="kw">use super</span>::{Uid, Gid}; |
| |
| <span class="doccomment">/// Sets the real, effective, and saved uid. |
| /// ([see setresuid(2)](https://man7.org/linux/man-pages/man2/setresuid.2.html)) |
| /// |
| /// * `ruid`: real user id |
| /// * `euid`: effective user id |
| /// * `suid`: saved user id |
| /// * returns: Ok or libc error code. |
| /// |
| /// Err is returned if the user doesn't have permission to set this UID. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>setresuid(ruid: Uid, euid: Uid, suid: Uid) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::setresuid(ruid.into(), euid.into(), suid.into()) }; |
| |
| Errno::result(res).map(drop) |
| } |
| |
| <span class="doccomment">/// Sets the real, effective, and saved gid. |
| /// ([see setresuid(2)](https://man7.org/linux/man-pages/man2/setresuid.2.html)) |
| /// |
| /// * `rgid`: real group id |
| /// * `egid`: effective group id |
| /// * `sgid`: saved group id |
| /// * returns: Ok or libc error code. |
| /// |
| /// Err is returned if the user doesn't have permission to set this GID. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>setresgid(rgid: Gid, egid: Gid, sgid: Gid) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::setresgid(rgid.into(), egid.into(), sgid.into()) }; |
| |
| Errno::result(res).map(drop) |
| } |
| } |
| } |
| |
| <span class="attribute">#[cfg(any( |
| target_os = <span class="string">"android"</span>, |
| target_os = <span class="string">"dragonfly"</span>, |
| target_os = <span class="string">"freebsd"</span>, |
| target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"openbsd" |
| </span>))] |
| </span><span class="kw">mod </span>getres { |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![feature = <span class="string">"user"</span>] |
| |
| </span><span class="kw">use </span><span class="kw">crate</span>::Result; |
| <span class="kw">use </span><span class="kw">crate</span>::errno::Errno; |
| <span class="kw">use super</span>::{Uid, Gid}; |
| |
| <span class="doccomment">/// Real, effective and saved user IDs. |
| </span><span class="attribute">#[derive(Debug, Copy, Clone, Eq, PartialEq)] |
| </span><span class="kw">pub struct </span>ResUid { |
| <span class="kw">pub </span>real: Uid, |
| <span class="kw">pub </span>effective: Uid, |
| <span class="kw">pub </span>saved: Uid |
| } |
| |
| <span class="doccomment">/// Real, effective and saved group IDs. |
| </span><span class="attribute">#[derive(Debug, Copy, Clone, Eq, PartialEq)] |
| </span><span class="kw">pub struct </span>ResGid { |
| <span class="kw">pub </span>real: Gid, |
| <span class="kw">pub </span>effective: Gid, |
| <span class="kw">pub </span>saved: Gid |
| } |
| |
| <span class="doccomment">/// Gets the real, effective, and saved user IDs. |
| /// |
| /// ([see getresuid(2)](http://man7.org/linux/man-pages/man2/getresuid.2.html)) |
| /// |
| /// #Returns |
| /// |
| /// - `Ok((Uid, Uid, Uid))`: tuple of real, effective and saved uids on success. |
| /// - `Err(x)`: libc error code on failure. |
| /// |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>getresuid() -> <span class="prelude-ty">Result</span><ResUid> { |
| <span class="kw">let </span><span class="kw-2">mut </span>ruid = libc::uid_t::max_value(); |
| <span class="kw">let </span><span class="kw-2">mut </span>euid = libc::uid_t::max_value(); |
| <span class="kw">let </span><span class="kw-2">mut </span>suid = libc::uid_t::max_value(); |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::getresuid(<span class="kw-2">&mut </span>ruid, <span class="kw-2">&mut </span>euid, <span class="kw-2">&mut </span>suid) }; |
| |
| Errno::result(res).map(|<span class="kw">_</span>| ResUid{ real: Uid(ruid), effective: Uid(euid), saved: Uid(suid) }) |
| } |
| |
| <span class="doccomment">/// Gets the real, effective, and saved group IDs. |
| /// |
| /// ([see getresgid(2)](http://man7.org/linux/man-pages/man2/getresgid.2.html)) |
| /// |
| /// #Returns |
| /// |
| /// - `Ok((Gid, Gid, Gid))`: tuple of real, effective and saved gids on success. |
| /// - `Err(x)`: libc error code on failure. |
| /// |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>getresgid() -> <span class="prelude-ty">Result</span><ResGid> { |
| <span class="kw">let </span><span class="kw-2">mut </span>rgid = libc::gid_t::max_value(); |
| <span class="kw">let </span><span class="kw-2">mut </span>egid = libc::gid_t::max_value(); |
| <span class="kw">let </span><span class="kw-2">mut </span>sgid = libc::gid_t::max_value(); |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::getresgid(<span class="kw-2">&mut </span>rgid, <span class="kw-2">&mut </span>egid, <span class="kw-2">&mut </span>sgid) }; |
| |
| Errno::result(res).map(|<span class="kw">_</span>| ResGid { real: Gid(rgid), effective: Gid(egid), saved: Gid(sgid) } ) |
| } |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"fs"</span>)] |
| </span><span class="macro">libc_bitflags! </span>{ |
| <span class="doccomment">/// Options for access() |
| </span><span class="attribute">#[cfg_attr(docsrs, doc(cfg(feature = <span class="string">"fs"</span>)))] |
| </span><span class="kw">pub struct </span>AccessFlags : c_int { |
| <span class="doccomment">/// Test for existence of file. |
| </span>F_OK; |
| <span class="doccomment">/// Test for read permission. |
| </span>R_OK; |
| <span class="doccomment">/// Test for write permission. |
| </span>W_OK; |
| <span class="doccomment">/// Test for execute (search) permission. |
| </span>X_OK; |
| } |
| } |
| |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![feature = <span class="string">"fs"</span>] |
| |
| </span><span class="doccomment">/// Checks the file named by `path` for accessibility according to the flags given by `amode` |
| /// See [access(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/access.html) |
| </span><span class="kw">pub fn </span>access<P: <span class="question-mark">?</span>Sized + NixPath>(path: <span class="kw-2">&</span>P, amode: AccessFlags) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = path.with_nix_path(|cstr| { |
| <span class="kw">unsafe </span>{ |
| libc::access(cstr.as_ptr(), amode.bits) |
| } |
| })<span class="question-mark">?</span>; |
| Errno::result(res).map(drop) |
| } |
| |
| <span class="doccomment">/// Checks the file named by `path` for accessibility according to the flags given by `mode` |
| /// |
| /// If `dirfd` has a value, then `path` is relative to directory associated with the file descriptor. |
| /// |
| /// If `dirfd` is `None`, then `path` is relative to the current working directory. |
| /// |
| /// # References |
| /// |
| /// [faccessat(2)](http://pubs.opengroup.org/onlinepubs/9699919799/functions/faccessat.html) |
| </span><span class="comment">// redox: does not appear to support the *at family of syscalls. |
| </span><span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| </span><span class="kw">pub fn </span>faccessat<P: <span class="question-mark">?</span>Sized + NixPath>(dirfd: <span class="prelude-ty">Option</span><RawFd>, path: <span class="kw-2">&</span>P, mode: AccessFlags, flags: AtFlags) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = path.with_nix_path(|cstr| { |
| <span class="kw">unsafe </span>{ |
| libc::faccessat(at_rawfd(dirfd), cstr.as_ptr(), mode.bits(), flags.bits()) |
| } |
| })<span class="question-mark">?</span>; |
| Errno::result(res).map(drop) |
| } |
| |
| <span class="doccomment">/// Checks the file named by `path` for accessibility according to the flags given |
| /// by `mode` using effective UID, effective GID and supplementary group lists. |
| /// |
| /// # References |
| /// |
| /// * [FreeBSD man page](https://www.freebsd.org/cgi/man.cgi?query=eaccess&sektion=2&n=1) |
| /// * [Linux man page](https://man7.org/linux/man-pages/man3/euidaccess.3.html) |
| </span><span class="attribute">#[cfg(any( |
| all(target_os = <span class="string">"linux"</span>, not(target_env = <span class="string">"uclibc"</span>)), |
| target_os = <span class="string">"freebsd"</span>, |
| target_os = <span class="string">"dragonfly" |
| </span>))] |
| </span><span class="kw">pub fn </span>eaccess<P: <span class="question-mark">?</span>Sized + NixPath>(path: <span class="kw-2">&</span>P, mode: AccessFlags) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = path.with_nix_path(|cstr| { |
| <span class="kw">unsafe </span>{ |
| libc::eaccess(cstr.as_ptr(), mode.bits) |
| } |
| })<span class="question-mark">?</span>; |
| Errno::result(res).map(drop) |
| } |
| } |
| |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![feature = <span class="string">"user"</span>] |
| |
| </span><span class="doccomment">/// Representation of a User, based on `libc::passwd` |
| /// |
| /// The reason some fields in this struct are `String` and others are `CString` is because some |
| /// fields are based on the user's locale, which could be non-UTF8, while other fields are |
| /// guaranteed to conform to [`NAME_REGEX`](https://serverfault.com/a/73101/407341), which only |
| /// contains ASCII. |
| </span><span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] </span><span class="comment">// RedoxFS does not support passwd |
| </span><span class="attribute">#[derive(Debug, Clone, Eq, PartialEq)] |
| </span><span class="kw">pub struct </span>User { |
| <span class="doccomment">/// Username |
| </span><span class="kw">pub </span>name: String, |
| <span class="doccomment">/// User password (probably hashed) |
| </span><span class="kw">pub </span>passwd: CString, |
| <span class="doccomment">/// User ID |
| </span><span class="kw">pub </span>uid: Uid, |
| <span class="doccomment">/// Group ID |
| </span><span class="kw">pub </span>gid: Gid, |
| <span class="doccomment">/// User information |
| </span><span class="attribute">#[cfg(not(all(target_os = <span class="string">"android"</span>, target_pointer_width = <span class="string">"32"</span>)))] |
| </span><span class="kw">pub </span>gecos: CString, |
| <span class="doccomment">/// Home directory |
| </span><span class="kw">pub </span>dir: PathBuf, |
| <span class="doccomment">/// Path to shell |
| </span><span class="kw">pub </span>shell: PathBuf, |
| <span class="doccomment">/// Login class |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"android"</span>, |
| target_os = <span class="string">"fuchsia"</span>, |
| target_os = <span class="string">"haiku"</span>, |
| target_os = <span class="string">"illumos"</span>, |
| target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"solaris"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="kw">pub </span>class: CString, |
| <span class="doccomment">/// Last password change |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"android"</span>, |
| target_os = <span class="string">"fuchsia"</span>, |
| target_os = <span class="string">"haiku"</span>, |
| target_os = <span class="string">"illumos"</span>, |
| target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"solaris"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="kw">pub </span>change: libc::time_t, |
| <span class="doccomment">/// Expiration time of account |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"android"</span>, |
| target_os = <span class="string">"fuchsia"</span>, |
| target_os = <span class="string">"haiku"</span>, |
| target_os = <span class="string">"illumos"</span>, |
| target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"solaris"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="kw">pub </span>expire: libc::time_t |
| } |
| |
| <span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] </span><span class="comment">//RedoxFS does not support passwd |
| </span><span class="kw">impl </span>From<<span class="kw-2">&</span>libc::passwd> <span class="kw">for </span>User { |
| <span class="kw">fn </span>from(pw: <span class="kw-2">&</span>libc::passwd) -> User { |
| <span class="kw">unsafe </span>{ |
| User { |
| name: <span class="kw">if </span>pw.pw_name.is_null() { Default::default() } <span class="kw">else </span>{ CStr::from_ptr(pw.pw_name).to_string_lossy().into_owned() }, |
| passwd: <span class="kw">if </span>pw.pw_passwd.is_null() { Default::default() } <span class="kw">else </span>{ CString::new(CStr::from_ptr(pw.pw_passwd).to_bytes()).unwrap() }, |
| <span class="attribute">#[cfg(not(all(target_os = <span class="string">"android"</span>, target_pointer_width = <span class="string">"32"</span>)))] |
| </span>gecos: <span class="kw">if </span>pw.pw_gecos.is_null() { Default::default() } <span class="kw">else </span>{ CString::new(CStr::from_ptr(pw.pw_gecos).to_bytes()).unwrap() }, |
| dir: <span class="kw">if </span>pw.pw_dir.is_null() { Default::default() } <span class="kw">else </span>{ PathBuf::from(OsStr::from_bytes(CStr::from_ptr(pw.pw_dir).to_bytes())) }, |
| shell: <span class="kw">if </span>pw.pw_shell.is_null() { Default::default() } <span class="kw">else </span>{ PathBuf::from(OsStr::from_bytes(CStr::from_ptr(pw.pw_shell).to_bytes())) }, |
| uid: Uid::from_raw(pw.pw_uid), |
| gid: Gid::from_raw(pw.pw_gid), |
| <span class="attribute">#[cfg(not(any(target_os = <span class="string">"android"</span>, |
| target_os = <span class="string">"fuchsia"</span>, |
| target_os = <span class="string">"haiku"</span>, |
| target_os = <span class="string">"illumos"</span>, |
| target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"solaris"</span>)))] |
| </span>class: CString::new(CStr::from_ptr(pw.pw_class).to_bytes()).unwrap(), |
| <span class="attribute">#[cfg(not(any(target_os = <span class="string">"android"</span>, |
| target_os = <span class="string">"fuchsia"</span>, |
| target_os = <span class="string">"haiku"</span>, |
| target_os = <span class="string">"illumos"</span>, |
| target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"solaris"</span>)))] |
| </span>change: pw.pw_change, |
| <span class="attribute">#[cfg(not(any(target_os = <span class="string">"android"</span>, |
| target_os = <span class="string">"fuchsia"</span>, |
| target_os = <span class="string">"haiku"</span>, |
| target_os = <span class="string">"illumos"</span>, |
| target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"solaris"</span>)))] |
| </span>expire: pw.pw_expire |
| } |
| } |
| } |
| } |
| |
| <span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] </span><span class="comment">// RedoxFS does not support passwd |
| </span><span class="kw">impl </span>From<User> <span class="kw">for </span>libc::passwd { |
| <span class="kw">fn </span>from(u: User) -> <span class="self">Self </span>{ |
| <span class="kw">let </span>name = <span class="kw">match </span>CString::new(u.name) { |
| <span class="prelude-val">Ok</span>(n) => n.into_raw(), |
| <span class="prelude-val">Err</span>(<span class="kw">_</span>) => CString::new(<span class="string">""</span>).unwrap().into_raw(), |
| }; |
| <span class="kw">let </span>dir = <span class="kw">match </span>u.dir.into_os_string().into_string() { |
| <span class="prelude-val">Ok</span>(s) => CString::new(s.as_str()).unwrap().into_raw(), |
| <span class="prelude-val">Err</span>(<span class="kw">_</span>) => CString::new(<span class="string">""</span>).unwrap().into_raw(), |
| }; |
| <span class="kw">let </span>shell = <span class="kw">match </span>u.shell.into_os_string().into_string() { |
| <span class="prelude-val">Ok</span>(s) => CString::new(s.as_str()).unwrap().into_raw(), |
| <span class="prelude-val">Err</span>(<span class="kw">_</span>) => CString::new(<span class="string">""</span>).unwrap().into_raw(), |
| }; |
| <span class="self">Self </span>{ |
| pw_name: name, |
| pw_passwd: u.passwd.into_raw(), |
| <span class="attribute">#[cfg(not(all(target_os = <span class="string">"android"</span>, target_pointer_width = <span class="string">"32"</span>)))] |
| </span>pw_gecos: u.gecos.into_raw(), |
| pw_dir: dir, |
| pw_shell: shell, |
| pw_uid: u.uid.<span class="number">0</span>, |
| pw_gid: u.gid.<span class="number">0</span>, |
| <span class="attribute">#[cfg(not(any(target_os = <span class="string">"android"</span>, |
| target_os = <span class="string">"fuchsia"</span>, |
| target_os = <span class="string">"haiku"</span>, |
| target_os = <span class="string">"illumos"</span>, |
| target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"solaris"</span>)))] |
| </span>pw_class: u.class.into_raw(), |
| <span class="attribute">#[cfg(not(any(target_os = <span class="string">"android"</span>, |
| target_os = <span class="string">"fuchsia"</span>, |
| target_os = <span class="string">"haiku"</span>, |
| target_os = <span class="string">"illumos"</span>, |
| target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"solaris"</span>)))] |
| </span>pw_change: u.change, |
| <span class="attribute">#[cfg(not(any(target_os = <span class="string">"android"</span>, |
| target_os = <span class="string">"fuchsia"</span>, |
| target_os = <span class="string">"haiku"</span>, |
| target_os = <span class="string">"illumos"</span>, |
| target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"solaris"</span>)))] |
| </span>pw_expire: u.expire, |
| <span class="attribute">#[cfg(target_os = <span class="string">"illumos"</span>)] |
| </span>pw_age: CString::new(<span class="string">""</span>).unwrap().into_raw(), |
| <span class="attribute">#[cfg(target_os = <span class="string">"illumos"</span>)] |
| </span>pw_comment: CString::new(<span class="string">""</span>).unwrap().into_raw(), |
| <span class="attribute">#[cfg(any(target_os = <span class="string">"dragonfly"</span>, target_os = <span class="string">"freebsd"</span>))] |
| </span>pw_fields: <span class="number">0</span>, |
| } |
| } |
| } |
| |
| <span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] </span><span class="comment">// RedoxFS does not support passwd |
| </span><span class="kw">impl </span>User { |
| <span class="kw">fn </span>from_anything<F>(f: F) -> <span class="prelude-ty">Result</span><<span class="prelude-ty">Option</span><<span class="self">Self</span>>> |
| <span class="kw">where |
| </span>F: Fn(<span class="kw-2">*mut </span>libc::passwd, |
| <span class="kw-2">*mut </span>c_char, |
| libc::size_t, |
| <span class="kw-2">*mut *mut </span>libc::passwd) -> libc::c_int |
| { |
| <span class="kw">let </span>buflimit = <span class="number">1048576</span>; |
| <span class="kw">let </span>bufsize = <span class="kw">match </span>sysconf(SysconfVar::GETPW_R_SIZE_MAX) { |
| <span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>(n)) => n <span class="kw">as </span>usize, |
| <span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>) | <span class="prelude-val">Err</span>(<span class="kw">_</span>) => <span class="number">16384</span>, |
| }; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>cbuf = Vec::with_capacity(bufsize); |
| <span class="kw">let </span><span class="kw-2">mut </span>pwd = mem::MaybeUninit::<libc::passwd>::uninit(); |
| <span class="kw">let </span><span class="kw-2">mut </span>res = ptr::null_mut(); |
| |
| <span class="kw">loop </span>{ |
| <span class="kw">let </span>error = f(pwd.as_mut_ptr(), cbuf.as_mut_ptr(), cbuf.capacity(), <span class="kw-2">&mut </span>res); |
| <span class="kw">if </span>error == <span class="number">0 </span>{ |
| <span class="kw">if </span>res.is_null() { |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>); |
| } <span class="kw">else </span>{ |
| <span class="kw">let </span>pwd = <span class="kw">unsafe </span>{ pwd.assume_init() }; |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>(User::from(<span class="kw-2">&</span>pwd))); |
| } |
| } <span class="kw">else if </span>Errno::last() == Errno::ERANGE { |
| <span class="comment">// Trigger the internal buffer resizing logic. |
| </span>reserve_double_buffer_size(<span class="kw-2">&mut </span>cbuf, buflimit)<span class="question-mark">?</span>; |
| } <span class="kw">else </span>{ |
| <span class="kw">return </span><span class="prelude-val">Err</span>(Errno::last()); |
| } |
| } |
| } |
| |
| <span class="doccomment">/// Get a user by UID. |
| /// |
| /// Internally, this function calls |
| /// [getpwuid_r(3)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/getpwuid_r.html) |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use nix::unistd::{Uid, User}; |
| /// // Returns an Result<Option<User>>, thus the double unwrap. |
| /// let res = User::from_uid(Uid::from_raw(0)).unwrap().unwrap(); |
| /// assert_eq!(res.name, "root"); |
| /// ``` |
| </span><span class="kw">pub fn </span>from_uid(uid: Uid) -> <span class="prelude-ty">Result</span><<span class="prelude-ty">Option</span><<span class="self">Self</span>>> { |
| User::from_anything(|pwd, cbuf, cap, res| { |
| <span class="kw">unsafe </span>{ libc::getpwuid_r(uid.<span class="number">0</span>, pwd, cbuf, cap, res) } |
| }) |
| } |
| |
| <span class="doccomment">/// Get a user by name. |
| /// |
| /// Internally, this function calls |
| /// [getpwnam_r(3)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/getpwuid_r.html) |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use nix::unistd::User; |
| /// // Returns an Result<Option<User>>, thus the double unwrap. |
| /// let res = User::from_name("root").unwrap().unwrap(); |
| /// assert_eq!(res.name, "root"); |
| /// ``` |
| </span><span class="kw">pub fn </span>from_name(name: <span class="kw-2">&</span>str) -> <span class="prelude-ty">Result</span><<span class="prelude-ty">Option</span><<span class="self">Self</span>>> { |
| <span class="kw">let </span>name = <span class="kw">match </span>CString::new(name) { |
| <span class="prelude-val">Ok</span>(c_str) => c_str, |
| <span class="prelude-val">Err</span>(_nul_error) => <span class="kw">return </span><span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>), |
| }; |
| User::from_anything(|pwd, cbuf, cap, res| { |
| <span class="kw">unsafe </span>{ libc::getpwnam_r(name.as_ptr(), pwd, cbuf, cap, res) } |
| }) |
| } |
| } |
| |
| <span class="doccomment">/// Representation of a Group, based on `libc::group` |
| </span><span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] </span><span class="comment">// RedoxFS does not support passwd |
| </span><span class="attribute">#[derive(Debug, Clone, Eq, PartialEq)] |
| </span><span class="kw">pub struct </span>Group { |
| <span class="doccomment">/// Group name |
| </span><span class="kw">pub </span>name: String, |
| <span class="doccomment">/// Group password |
| </span><span class="kw">pub </span>passwd: CString, |
| <span class="doccomment">/// Group ID |
| </span><span class="kw">pub </span>gid: Gid, |
| <span class="doccomment">/// List of Group members |
| </span><span class="kw">pub </span>mem: Vec<String> |
| } |
| |
| <span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] </span><span class="comment">// RedoxFS does not support passwd |
| </span><span class="kw">impl </span>From<<span class="kw-2">&</span>libc::group> <span class="kw">for </span>Group { |
| <span class="kw">fn </span>from(gr: <span class="kw-2">&</span>libc::group) -> Group { |
| <span class="kw">unsafe </span>{ |
| Group { |
| name: CStr::from_ptr(gr.gr_name).to_string_lossy().into_owned(), |
| passwd: CString::new(CStr::from_ptr(gr.gr_passwd).to_bytes()).unwrap(), |
| gid: Gid::from_raw(gr.gr_gid), |
| mem: Group::members(gr.gr_mem) |
| } |
| } |
| } |
| } |
| |
| <span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] </span><span class="comment">// RedoxFS does not support passwd |
| </span><span class="kw">impl </span>Group { |
| <span class="kw">unsafe fn </span>members(mem: <span class="kw-2">*mut *mut </span>c_char) -> Vec<String> { |
| <span class="kw">let </span><span class="kw-2">mut </span>ret = Vec::new(); |
| |
| <span class="kw">for </span>i <span class="kw">in </span><span class="number">0</span>.. { |
| <span class="kw">let </span>u = mem.offset(i); |
| <span class="kw">if </span>(<span class="kw-2">*</span>u).is_null() { |
| <span class="kw">break</span>; |
| } <span class="kw">else </span>{ |
| <span class="kw">let </span>s = CStr::from_ptr(<span class="kw-2">*</span>u).to_string_lossy().into_owned(); |
| ret.push(s); |
| } |
| } |
| |
| ret |
| } |
| |
| <span class="kw">fn </span>from_anything<F>(f: F) -> <span class="prelude-ty">Result</span><<span class="prelude-ty">Option</span><<span class="self">Self</span>>> |
| <span class="kw">where |
| </span>F: Fn(<span class="kw-2">*mut </span>libc::group, |
| <span class="kw-2">*mut </span>c_char, |
| libc::size_t, |
| <span class="kw-2">*mut *mut </span>libc::group) -> libc::c_int |
| { |
| <span class="kw">let </span>buflimit = <span class="number">1048576</span>; |
| <span class="kw">let </span>bufsize = <span class="kw">match </span>sysconf(SysconfVar::GETGR_R_SIZE_MAX) { |
| <span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>(n)) => n <span class="kw">as </span>usize, |
| <span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>) | <span class="prelude-val">Err</span>(<span class="kw">_</span>) => <span class="number">16384</span>, |
| }; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>cbuf = Vec::with_capacity(bufsize); |
| <span class="kw">let </span><span class="kw-2">mut </span>grp = mem::MaybeUninit::<libc::group>::uninit(); |
| <span class="kw">let </span><span class="kw-2">mut </span>res = ptr::null_mut(); |
| |
| <span class="kw">loop </span>{ |
| <span class="kw">let </span>error = f(grp.as_mut_ptr(), cbuf.as_mut_ptr(), cbuf.capacity(), <span class="kw-2">&mut </span>res); |
| <span class="kw">if </span>error == <span class="number">0 </span>{ |
| <span class="kw">if </span>res.is_null() { |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>); |
| } <span class="kw">else </span>{ |
| <span class="kw">let </span>grp = <span class="kw">unsafe </span>{ grp.assume_init() }; |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>(Group::from(<span class="kw-2">&</span>grp))); |
| } |
| } <span class="kw">else if </span>Errno::last() == Errno::ERANGE { |
| <span class="comment">// Trigger the internal buffer resizing logic. |
| </span>reserve_double_buffer_size(<span class="kw-2">&mut </span>cbuf, buflimit)<span class="question-mark">?</span>; |
| } <span class="kw">else </span>{ |
| <span class="kw">return </span><span class="prelude-val">Err</span>(Errno::last()); |
| } |
| } |
| } |
| |
| <span class="doccomment">/// Get a group by GID. |
| /// |
| /// Internally, this function calls |
| /// [getgrgid_r(3)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/getpwuid_r.html) |
| /// |
| /// # Examples |
| /// |
| </span><span class="comment">// Disable this test on all OS except Linux as root group may not exist. |
| </span><span class="attribute">#[cfg_attr(not(target_os = <span class="string">"linux"</span>), doc = <span class="string">" ```no_run"</span>)] |
| #[cfg_attr(target_os = <span class="string">"linux"</span>, doc = <span class="string">" ```"</span>)] |
| </span><span class="doccomment">/// use nix::unistd::{Gid, Group}; |
| /// // Returns an Result<Option<Group>>, thus the double unwrap. |
| /// let res = Group::from_gid(Gid::from_raw(0)).unwrap().unwrap(); |
| /// assert!(res.name == "root"); |
| /// ``` |
| </span><span class="kw">pub fn </span>from_gid(gid: Gid) -> <span class="prelude-ty">Result</span><<span class="prelude-ty">Option</span><<span class="self">Self</span>>> { |
| Group::from_anything(|grp, cbuf, cap, res| { |
| <span class="kw">unsafe </span>{ libc::getgrgid_r(gid.<span class="number">0</span>, grp, cbuf, cap, res) } |
| }) |
| } |
| |
| <span class="doccomment">/// Get a group by name. |
| /// |
| /// Internally, this function calls |
| /// [getgrnam_r(3)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/getpwuid_r.html) |
| /// |
| /// # Examples |
| /// |
| </span><span class="comment">// Disable this test on all OS except Linux as root group may not exist. |
| </span><span class="attribute">#[cfg_attr(not(target_os = <span class="string">"linux"</span>), doc = <span class="string">" ```no_run"</span>)] |
| #[cfg_attr(target_os = <span class="string">"linux"</span>, doc = <span class="string">" ```"</span>)] |
| </span><span class="doccomment">/// use nix::unistd::Group; |
| /// // Returns an Result<Option<Group>>, thus the double unwrap. |
| /// let res = Group::from_name("root").unwrap().unwrap(); |
| /// assert!(res.name == "root"); |
| /// ``` |
| </span><span class="kw">pub fn </span>from_name(name: <span class="kw-2">&</span>str) -> <span class="prelude-ty">Result</span><<span class="prelude-ty">Option</span><<span class="self">Self</span>>> { |
| <span class="kw">let </span>name = <span class="kw">match </span>CString::new(name) { |
| <span class="prelude-val">Ok</span>(c_str) => c_str, |
| <span class="prelude-val">Err</span>(_nul_error) => <span class="kw">return </span><span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>), |
| }; |
| Group::from_anything(|grp, cbuf, cap, res| { |
| <span class="kw">unsafe </span>{ libc::getgrnam_r(name.as_ptr(), grp, cbuf, cap, res) } |
| }) |
| } |
| } |
| } |
| |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![feature = <span class="string">"term"</span>] |
| |
| </span><span class="doccomment">/// Get the name of the terminal device that is open on file descriptor fd |
| /// (see [`ttyname(3)`](https://man7.org/linux/man-pages/man3/ttyname.3.html)). |
| </span><span class="attribute">#[cfg(not(target_os = <span class="string">"fuchsia"</span>))] |
| </span><span class="kw">pub fn </span>ttyname(fd: RawFd) -> <span class="prelude-ty">Result</span><PathBuf> { |
| <span class="kw">const </span>PATH_MAX: usize = libc::PATH_MAX <span class="kw">as </span>usize; |
| <span class="kw">let </span><span class="kw-2">mut </span>buf = <span class="macro">vec!</span>[<span class="number">0_u8</span>; PATH_MAX]; |
| <span class="kw">let </span>c_buf = buf.as_mut_ptr() <span class="kw">as </span><span class="kw-2">*mut </span>libc::c_char; |
| |
| <span class="kw">let </span>ret = <span class="kw">unsafe </span>{ libc::ttyname_r(fd, c_buf, buf.len()) }; |
| <span class="kw">if </span>ret != <span class="number">0 </span>{ |
| <span class="kw">return </span><span class="prelude-val">Err</span>(Errno::from_i32(ret)); |
| } |
| |
| <span class="kw">let </span>nul = buf.iter().position(|c| <span class="kw-2">*</span>c == <span class="string">b'\0'</span>).unwrap(); |
| buf.truncate(nul); |
| <span class="prelude-val">Ok</span>(OsString::from_vec(buf).into()) |
| } |
| } |
| |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![all(feature = <span class="string">"socket"</span>, feature = <span class="string">"user"</span>)] |
| |
| </span><span class="doccomment">/// Get the effective user ID and group ID associated with a Unix domain socket. |
| /// |
| /// See also [getpeereid(3)](https://www.freebsd.org/cgi/man.cgi?query=getpeereid) |
| </span><span class="attribute">#[cfg(any( |
| target_os = <span class="string">"macos"</span>, |
| target_os = <span class="string">"ios"</span>, |
| target_os = <span class="string">"freebsd"</span>, |
| target_os = <span class="string">"openbsd"</span>, |
| target_os = <span class="string">"netbsd"</span>, |
| target_os = <span class="string">"dragonfly"</span>, |
| ))] |
| </span><span class="kw">pub fn </span>getpeereid(fd: RawFd) -> <span class="prelude-ty">Result</span><(Uid, Gid)> { |
| <span class="kw">let </span><span class="kw-2">mut </span>uid = <span class="number">1</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>gid = <span class="number">1</span>; |
| |
| <span class="kw">let </span>ret = <span class="kw">unsafe </span>{ libc::getpeereid(fd, <span class="kw-2">&mut </span>uid, <span class="kw-2">&mut </span>gid) }; |
| |
| Errno::result(ret).map(|<span class="kw">_</span>| (Uid(uid), Gid(gid))) |
| } |
| } |
| |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![all(feature = <span class="string">"fs"</span>)] |
| |
| </span><span class="doccomment">/// Set the file flags. |
| /// |
| /// See also [chflags(2)](https://www.freebsd.org/cgi/man.cgi?query=chflags&sektion=2) |
| </span><span class="attribute">#[cfg(any( |
| target_os = <span class="string">"openbsd"</span>, |
| target_os = <span class="string">"netbsd"</span>, |
| target_os = <span class="string">"freebsd"</span>, |
| target_os = <span class="string">"dragonfly"</span>, |
| target_os = <span class="string">"macos"</span>, |
| target_os = <span class="string">"ios" |
| </span>))] |
| </span><span class="kw">pub fn </span>chflags<P: <span class="question-mark">?</span>Sized + NixPath>(path: <span class="kw-2">&</span>P, flags: FileFlag) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = path.with_nix_path(|cstr| <span class="kw">unsafe </span>{ |
| libc::chflags(cstr.as_ptr(), flags.bits()) |
| })<span class="question-mark">?</span>; |
| |
| Errno::result(res).map(drop) |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="nix" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
