| <!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="Change the file permission bits."><meta name="keywords" content="rust, rustlang, rust-lang, fchmodat"><title>fchmodat in nix::sys::stat - Rust</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="sidebar-items.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 fn"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">☰</button><a class="sidebar-logo" href="../../../nix/index.html"><div class="logo-container"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></div></a><h2></h2></nav><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><div class="sidebar-elems"><h2><a href="index.html">In nix::sys::stat</a></h2></div></nav><main><div class="width-limiter"><nav class="sub"><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="main-heading"><h1 class="fqn">Function <a href="../../index.html">nix</a>::<wbr><a href="../index.html">sys</a>::<wbr><a href="index.html">stat</a>::<wbr><a class="fn" href="#">fchmodat</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../../../clipboard.svg" width="19" height="18" alt="Copy item path"></button></h1><span class="out-of-band"><a class="srclink" href="../../../src/nix/sys/stat.rs.html#328-348">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="item-decl"><pre class="rust fn"><code>pub fn fchmodat<P: ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="../../trait.NixPath.html" title="trait nix::NixPath">NixPath</a>>(<br> dirfd: <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="type" href="https://doc.rust-lang.org/nightly/std/os/fd/raw/type.RawFd.html" title="type std::os::fd::raw::RawFd">RawFd</a>>,<br> path: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>P,<br> mode: <a class="struct" href="struct.Mode.html" title="struct nix::sys::stat::Mode">Mode</a>,<br> flag: <a class="enum" href="enum.FchmodatFlags.html" title="enum nix::sys::stat::FchmodatFlags">FchmodatFlags</a><br>) -> <a class="type" href="../../type.Result.html" title="type nix::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>></code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Change the file permission bits.</p> |
| <p>The file to be changed is determined relative to the directory associated |
| with the file descriptor <code>dirfd</code> or the current working directory |
| if <code>dirfd</code> is <code>None</code>.</p> |
| <p>If <code>flag</code> is <code>FchmodatFlags::NoFollowSymlink</code> and <code>path</code> names a symbolic link, |
| then the mode of the symbolic link is changed.</p> |
| <p><code>fchmodat(None, path, mode, FchmodatFlags::FollowSymlink)</code> is identical to |
| a call <code>libc::chmod(path, mode)</code>. That’s why <code>chmod</code> is unimplemented |
| in the <code>nix</code> crate.</p> |
| <h2 id="references"><a href="#references">References</a></h2> |
| <p><a href="https://pubs.opengroup.org/onlinepubs/9699919799/functions/fchmodat.html">fchmodat(2)</a>.</p> |
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