| <!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/sys/signal.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>signal.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="1076">1076</span> |
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| <span id="1078">1078</span> |
| <span id="1079">1079</span> |
| <span id="1080">1080</span> |
| <span id="1081">1081</span> |
| <span id="1082">1082</span> |
| <span id="1083">1083</span> |
| <span id="1084">1084</span> |
| <span id="1085">1085</span> |
| <span id="1086">1086</span> |
| <span id="1087">1087</span> |
| <span id="1088">1088</span> |
| <span id="1089">1089</span> |
| <span id="1090">1090</span> |
| <span id="1091">1091</span> |
| <span id="1092">1092</span> |
| <span id="1093">1093</span> |
| <span id="1094">1094</span> |
| <span id="1095">1095</span> |
| <span id="1096">1096</span> |
| <span id="1097">1097</span> |
| <span id="1098">1098</span> |
| <span id="1099">1099</span> |
| <span id="1100">1100</span> |
| <span id="1101">1101</span> |
| <span id="1102">1102</span> |
| <span id="1103">1103</span> |
| <span id="1104">1104</span> |
| <span id="1105">1105</span> |
| <span id="1106">1106</span> |
| <span id="1107">1107</span> |
| <span id="1108">1108</span> |
| <span id="1109">1109</span> |
| <span id="1110">1110</span> |
| <span id="1111">1111</span> |
| <span id="1112">1112</span> |
| <span id="1113">1113</span> |
| <span id="1114">1114</span> |
| <span id="1115">1115</span> |
| <span id="1116">1116</span> |
| <span id="1117">1117</span> |
| <span id="1118">1118</span> |
| <span id="1119">1119</span> |
| <span id="1120">1120</span> |
| <span id="1121">1121</span> |
| <span id="1122">1122</span> |
| <span id="1123">1123</span> |
| <span id="1124">1124</span> |
| <span id="1125">1125</span> |
| <span id="1126">1126</span> |
| <span id="1127">1127</span> |
| <span id="1128">1128</span> |
| <span id="1129">1129</span> |
| <span id="1130">1130</span> |
| <span id="1131">1131</span> |
| <span id="1132">1132</span> |
| <span id="1133">1133</span> |
| <span id="1134">1134</span> |
| <span id="1135">1135</span> |
| <span id="1136">1136</span> |
| <span id="1137">1137</span> |
| <span id="1138">1138</span> |
| <span id="1139">1139</span> |
| <span id="1140">1140</span> |
| <span id="1141">1141</span> |
| <span id="1142">1142</span> |
| <span id="1143">1143</span> |
| <span id="1144">1144</span> |
| <span id="1145">1145</span> |
| <span id="1146">1146</span> |
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| <span id="1148">1148</span> |
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| <span id="1150">1150</span> |
| <span id="1151">1151</span> |
| <span id="1152">1152</span> |
| <span id="1153">1153</span> |
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| <span id="1155">1155</span> |
| <span id="1156">1156</span> |
| <span id="1157">1157</span> |
| <span id="1158">1158</span> |
| <span id="1159">1159</span> |
| <span id="1160">1160</span> |
| <span id="1161">1161</span> |
| <span id="1162">1162</span> |
| <span id="1163">1163</span> |
| <span id="1164">1164</span> |
| <span id="1165">1165</span> |
| <span id="1166">1166</span> |
| <span id="1167">1167</span> |
| <span id="1168">1168</span> |
| <span id="1169">1169</span> |
| <span id="1170">1170</span> |
| <span id="1171">1171</span> |
| <span id="1172">1172</span> |
| <span id="1173">1173</span> |
| <span id="1174">1174</span> |
| <span id="1175">1175</span> |
| <span id="1176">1176</span> |
| <span id="1177">1177</span> |
| <span id="1178">1178</span> |
| <span id="1179">1179</span> |
| <span id="1180">1180</span> |
| <span id="1181">1181</span> |
| <span id="1182">1182</span> |
| <span id="1183">1183</span> |
| <span id="1184">1184</span> |
| <span id="1185">1185</span> |
| <span id="1186">1186</span> |
| <span id="1187">1187</span> |
| <span id="1188">1188</span> |
| <span id="1189">1189</span> |
| <span id="1190">1190</span> |
| <span id="1191">1191</span> |
| <span id="1192">1192</span> |
| <span id="1193">1193</span> |
| <span id="1194">1194</span> |
| <span id="1195">1195</span> |
| <span id="1196">1196</span> |
| <span id="1197">1197</span> |
| <span id="1198">1198</span> |
| <span id="1199">1199</span> |
| <span id="1200">1200</span> |
| <span id="1201">1201</span> |
| <span id="1202">1202</span> |
| <span id="1203">1203</span> |
| <span id="1204">1204</span> |
| <span id="1205">1205</span> |
| <span id="1206">1206</span> |
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| <span id="1210">1210</span> |
| <span id="1211">1211</span> |
| <span id="1212">1212</span> |
| <span id="1213">1213</span> |
| <span id="1214">1214</span> |
| <span id="1215">1215</span> |
| <span id="1216">1216</span> |
| <span id="1217">1217</span> |
| <span id="1218">1218</span> |
| <span id="1219">1219</span> |
| <span id="1220">1220</span> |
| <span id="1221">1221</span> |
| <span id="1222">1222</span> |
| <span id="1223">1223</span> |
| <span id="1224">1224</span> |
| <span id="1225">1225</span> |
| <span id="1226">1226</span> |
| <span id="1227">1227</span> |
| <span id="1228">1228</span> |
| <span id="1229">1229</span> |
| <span id="1230">1230</span> |
| <span id="1231">1231</span> |
| <span id="1232">1232</span> |
| <span id="1233">1233</span> |
| <span id="1234">1234</span> |
| <span id="1235">1235</span> |
| <span id="1236">1236</span> |
| <span id="1237">1237</span> |
| <span id="1238">1238</span> |
| <span id="1239">1239</span> |
| <span id="1240">1240</span> |
| <span id="1241">1241</span> |
| <span id="1242">1242</span> |
| <span id="1243">1243</span> |
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| <span id="1298">1298</span> |
| <span id="1299">1299</span> |
| <span id="1300">1300</span> |
| <span id="1301">1301</span> |
| <span id="1302">1302</span> |
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| <span id="1339">1339</span> |
| <span id="1340">1340</span> |
| <span id="1341">1341</span> |
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| <span id="1343">1343</span> |
| <span id="1344">1344</span> |
| <span id="1345">1345</span> |
| <span id="1346">1346</span> |
| <span id="1347">1347</span> |
| <span id="1348">1348</span> |
| </pre><pre class="rust"><code><span class="comment">// Portions of this file are Copyright 2014 The Rust Project Developers. |
| // See https://www.rust-lang.org/policies/licenses. |
| |
| </span><span class="doccomment">//! Operating system signals. |
| |
| </span><span class="kw">use </span><span class="kw">crate</span>::errno::Errno; |
| <span class="kw">use crate</span>::{Error, <span class="prelude-ty">Result</span>}; |
| <span class="kw">use </span>cfg_if::cfg_if; |
| <span class="kw">use </span>std::fmt; |
| <span class="kw">use </span>std::mem; |
| <span class="attribute">#[cfg(any(target_os = <span class="string">"dragonfly"</span>, target_os = <span class="string">"freebsd"</span>))] |
| </span><span class="kw">use </span>std::os::unix::io::RawFd; |
| <span class="kw">use </span>std::ptr; |
| <span class="kw">use </span>std::str::FromStr; |
| |
| <span class="attribute">#[cfg(not(any(target_os = <span class="string">"openbsd"</span>, target_os = <span class="string">"redox"</span>)))] |
| #[cfg(any(feature = <span class="string">"aio"</span>, feature = <span class="string">"signal"</span>))] |
| </span><span class="kw">pub use </span><span class="self">self</span>::sigevent::<span class="kw-2">*</span>; |
| |
| <span class="attribute">#[cfg(any(feature = <span class="string">"aio"</span>, feature = <span class="string">"process"</span>, feature = <span class="string">"signal"</span>))] |
| </span><span class="macro">libc_enum! </span>{ |
| <span class="doccomment">/// Types of operating system signals |
| </span><span class="comment">// Currently there is only one definition of c_int in libc, as well as only one |
| // type for signal constants. |
| // We would prefer to use the libc::c_int alias in the repr attribute. Unfortunately |
| // this is not (yet) possible. |
| </span><span class="attribute">#[repr(i32)] |
| #[non_exhaustive] |
| #[cfg_attr(docsrs, doc(cfg(any(feature = <span class="string">"aio"</span>, feature = <span class="string">"signal"</span>))))] |
| </span><span class="kw">pub enum </span>Signal { |
| <span class="doccomment">/// Hangup |
| </span>SIGHUP, |
| <span class="doccomment">/// Interrupt |
| </span>SIGINT, |
| <span class="doccomment">/// Quit |
| </span>SIGQUIT, |
| <span class="doccomment">/// Illegal instruction (not reset when caught) |
| </span>SIGILL, |
| <span class="doccomment">/// Trace trap (not reset when caught) |
| </span>SIGTRAP, |
| <span class="doccomment">/// Abort |
| </span>SIGABRT, |
| <span class="doccomment">/// Bus error |
| </span>SIGBUS, |
| <span class="doccomment">/// Floating point exception |
| </span>SIGFPE, |
| <span class="doccomment">/// Kill (cannot be caught or ignored) |
| </span>SIGKILL, |
| <span class="doccomment">/// User defined signal 1 |
| </span>SIGUSR1, |
| <span class="doccomment">/// Segmentation violation |
| </span>SIGSEGV, |
| <span class="doccomment">/// User defined signal 2 |
| </span>SIGUSR2, |
| <span class="doccomment">/// Write on a pipe with no one to read it |
| </span>SIGPIPE, |
| <span class="doccomment">/// Alarm clock |
| </span>SIGALRM, |
| <span class="doccomment">/// Software termination signal from kill |
| </span>SIGTERM, |
| <span class="doccomment">/// Stack fault (obsolete) |
| </span><span class="attribute">#[cfg(all(any(target_os = <span class="string">"android"</span>, target_os = <span class="string">"emscripten"</span>, |
| target_os = <span class="string">"fuchsia"</span>, target_os = <span class="string">"linux"</span>), |
| not(any(target_arch = <span class="string">"mips"</span>, target_arch = <span class="string">"mips64"</span>, |
| target_arch = <span class="string">"sparc64"</span>))))] |
| </span>SIGSTKFLT, |
| <span class="doccomment">/// To parent on child stop or exit |
| </span>SIGCHLD, |
| <span class="doccomment">/// Continue a stopped process |
| </span>SIGCONT, |
| <span class="doccomment">/// Sendable stop signal not from tty |
| </span>SIGSTOP, |
| <span class="doccomment">/// Stop signal from tty |
| </span>SIGTSTP, |
| <span class="doccomment">/// To readers pgrp upon background tty read |
| </span>SIGTTIN, |
| <span class="doccomment">/// Like TTIN if (tp->t_local&LTOSTOP) |
| </span>SIGTTOU, |
| <span class="doccomment">/// Urgent condition on IO channel |
| </span>SIGURG, |
| <span class="doccomment">/// Exceeded CPU time limit |
| </span>SIGXCPU, |
| <span class="doccomment">/// Exceeded file size limit |
| </span>SIGXFSZ, |
| <span class="doccomment">/// Virtual time alarm |
| </span>SIGVTALRM, |
| <span class="doccomment">/// Profiling time alarm |
| </span>SIGPROF, |
| <span class="doccomment">/// Window size changes |
| </span>SIGWINCH, |
| <span class="doccomment">/// Input/output possible signal |
| </span><span class="attribute">#[cfg(not(target_os = <span class="string">"haiku"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>SIGIO, |
| <span class="attribute">#[cfg(any(target_os = <span class="string">"android"</span>, target_os = <span class="string">"emscripten"</span>, |
| target_os = <span class="string">"fuchsia"</span>, target_os = <span class="string">"linux"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// Power failure imminent. |
| </span>SIGPWR, |
| <span class="doccomment">/// Bad system call |
| </span>SIGSYS, |
| <span class="attribute">#[cfg(not(any(target_os = <span class="string">"android"</span>, target_os = <span class="string">"emscripten"</span>, |
| target_os = <span class="string">"fuchsia"</span>, target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// Emulator trap |
| </span>SIGEMT, |
| <span class="attribute">#[cfg(not(any(target_os = <span class="string">"android"</span>, target_os = <span class="string">"emscripten"</span>, |
| target_os = <span class="string">"fuchsia"</span>, target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"redox"</span>, target_os = <span class="string">"haiku"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="doccomment">/// Information request |
| </span>SIGINFO, |
| } |
| <span class="kw">impl </span>TryFrom<i32> |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"signal"</span>)] |
| </span><span class="kw">impl </span>FromStr <span class="kw">for </span>Signal { |
| <span class="kw">type </span><span class="prelude-val">Err </span>= Error; |
| <span class="kw">fn </span>from_str(s: <span class="kw-2">&</span>str) -> <span class="prelude-ty">Result</span><Signal> { |
| <span class="prelude-val">Ok</span>(<span class="kw">match </span>s { |
| <span class="string">"SIGHUP" </span>=> Signal::SIGHUP, |
| <span class="string">"SIGINT" </span>=> Signal::SIGINT, |
| <span class="string">"SIGQUIT" </span>=> Signal::SIGQUIT, |
| <span class="string">"SIGILL" </span>=> Signal::SIGILL, |
| <span class="string">"SIGTRAP" </span>=> Signal::SIGTRAP, |
| <span class="string">"SIGABRT" </span>=> Signal::SIGABRT, |
| <span class="string">"SIGBUS" </span>=> Signal::SIGBUS, |
| <span class="string">"SIGFPE" </span>=> Signal::SIGFPE, |
| <span class="string">"SIGKILL" </span>=> Signal::SIGKILL, |
| <span class="string">"SIGUSR1" </span>=> Signal::SIGUSR1, |
| <span class="string">"SIGSEGV" </span>=> Signal::SIGSEGV, |
| <span class="string">"SIGUSR2" </span>=> Signal::SIGUSR2, |
| <span class="string">"SIGPIPE" </span>=> Signal::SIGPIPE, |
| <span class="string">"SIGALRM" </span>=> Signal::SIGALRM, |
| <span class="string">"SIGTERM" </span>=> Signal::SIGTERM, |
| <span class="attribute">#[cfg(all( |
| any( |
| target_os = <span class="string">"android"</span>, |
| target_os = <span class="string">"emscripten"</span>, |
| target_os = <span class="string">"fuchsia"</span>, |
| target_os = <span class="string">"linux" |
| </span>), |
| not(any( |
| target_arch = <span class="string">"mips"</span>, |
| target_arch = <span class="string">"mips64"</span>, |
| target_arch = <span class="string">"sparc64" |
| </span>)) |
| ))] |
| </span><span class="string">"SIGSTKFLT" </span>=> Signal::SIGSTKFLT, |
| <span class="string">"SIGCHLD" </span>=> Signal::SIGCHLD, |
| <span class="string">"SIGCONT" </span>=> Signal::SIGCONT, |
| <span class="string">"SIGSTOP" </span>=> Signal::SIGSTOP, |
| <span class="string">"SIGTSTP" </span>=> Signal::SIGTSTP, |
| <span class="string">"SIGTTIN" </span>=> Signal::SIGTTIN, |
| <span class="string">"SIGTTOU" </span>=> Signal::SIGTTOU, |
| <span class="string">"SIGURG" </span>=> Signal::SIGURG, |
| <span class="string">"SIGXCPU" </span>=> Signal::SIGXCPU, |
| <span class="string">"SIGXFSZ" </span>=> Signal::SIGXFSZ, |
| <span class="string">"SIGVTALRM" </span>=> Signal::SIGVTALRM, |
| <span class="string">"SIGPROF" </span>=> Signal::SIGPROF, |
| <span class="string">"SIGWINCH" </span>=> Signal::SIGWINCH, |
| <span class="attribute">#[cfg(not(target_os = <span class="string">"haiku"</span>))] |
| </span><span class="string">"SIGIO" </span>=> Signal::SIGIO, |
| <span class="attribute">#[cfg(any( |
| target_os = <span class="string">"android"</span>, |
| target_os = <span class="string">"emscripten"</span>, |
| target_os = <span class="string">"fuchsia"</span>, |
| target_os = <span class="string">"linux" |
| </span>))] |
| </span><span class="string">"SIGPWR" </span>=> Signal::SIGPWR, |
| <span class="string">"SIGSYS" </span>=> Signal::SIGSYS, |
| <span class="attribute">#[cfg(not(any( |
| target_os = <span class="string">"android"</span>, |
| target_os = <span class="string">"emscripten"</span>, |
| target_os = <span class="string">"fuchsia"</span>, |
| target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"redox"</span>, |
| target_os = <span class="string">"haiku" |
| </span>)))] |
| </span><span class="string">"SIGEMT" </span>=> Signal::SIGEMT, |
| <span class="attribute">#[cfg(not(any( |
| target_os = <span class="string">"android"</span>, |
| target_os = <span class="string">"emscripten"</span>, |
| target_os = <span class="string">"fuchsia"</span>, |
| target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"redox"</span>, |
| target_os = <span class="string">"haiku" |
| </span>)))] |
| </span><span class="string">"SIGINFO" </span>=> Signal::SIGINFO, |
| <span class="kw">_ </span>=> <span class="kw">return </span><span class="prelude-val">Err</span>(Errno::EINVAL), |
| }) |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"signal"</span>)] |
| </span><span class="kw">impl </span>Signal { |
| <span class="doccomment">/// Returns name of signal. |
| /// |
| /// This function is equivalent to `<Signal as AsRef<str>>::as_ref()`, |
| /// with difference that returned string is `'static` |
| /// and not bound to `self`'s lifetime. |
| </span><span class="kw">pub const fn </span>as_str(<span class="self">self</span>) -> <span class="kw-2">&</span><span class="lifetime">'static </span>str { |
| <span class="kw">match </span><span class="self">self </span>{ |
| Signal::SIGHUP => <span class="string">"SIGHUP"</span>, |
| Signal::SIGINT => <span class="string">"SIGINT"</span>, |
| Signal::SIGQUIT => <span class="string">"SIGQUIT"</span>, |
| Signal::SIGILL => <span class="string">"SIGILL"</span>, |
| Signal::SIGTRAP => <span class="string">"SIGTRAP"</span>, |
| Signal::SIGABRT => <span class="string">"SIGABRT"</span>, |
| Signal::SIGBUS => <span class="string">"SIGBUS"</span>, |
| Signal::SIGFPE => <span class="string">"SIGFPE"</span>, |
| Signal::SIGKILL => <span class="string">"SIGKILL"</span>, |
| Signal::SIGUSR1 => <span class="string">"SIGUSR1"</span>, |
| Signal::SIGSEGV => <span class="string">"SIGSEGV"</span>, |
| Signal::SIGUSR2 => <span class="string">"SIGUSR2"</span>, |
| Signal::SIGPIPE => <span class="string">"SIGPIPE"</span>, |
| Signal::SIGALRM => <span class="string">"SIGALRM"</span>, |
| Signal::SIGTERM => <span class="string">"SIGTERM"</span>, |
| <span class="attribute">#[cfg(all( |
| any( |
| target_os = <span class="string">"android"</span>, |
| target_os = <span class="string">"emscripten"</span>, |
| target_os = <span class="string">"fuchsia"</span>, |
| target_os = <span class="string">"linux" |
| </span>), |
| not(any( |
| target_arch = <span class="string">"mips"</span>, |
| target_arch = <span class="string">"mips64"</span>, |
| target_arch = <span class="string">"sparc64" |
| </span>)) |
| ))] |
| </span>Signal::SIGSTKFLT => <span class="string">"SIGSTKFLT"</span>, |
| Signal::SIGCHLD => <span class="string">"SIGCHLD"</span>, |
| Signal::SIGCONT => <span class="string">"SIGCONT"</span>, |
| Signal::SIGSTOP => <span class="string">"SIGSTOP"</span>, |
| Signal::SIGTSTP => <span class="string">"SIGTSTP"</span>, |
| Signal::SIGTTIN => <span class="string">"SIGTTIN"</span>, |
| Signal::SIGTTOU => <span class="string">"SIGTTOU"</span>, |
| Signal::SIGURG => <span class="string">"SIGURG"</span>, |
| Signal::SIGXCPU => <span class="string">"SIGXCPU"</span>, |
| Signal::SIGXFSZ => <span class="string">"SIGXFSZ"</span>, |
| Signal::SIGVTALRM => <span class="string">"SIGVTALRM"</span>, |
| Signal::SIGPROF => <span class="string">"SIGPROF"</span>, |
| Signal::SIGWINCH => <span class="string">"SIGWINCH"</span>, |
| <span class="attribute">#[cfg(not(target_os = <span class="string">"haiku"</span>))] |
| </span>Signal::SIGIO => <span class="string">"SIGIO"</span>, |
| <span class="attribute">#[cfg(any( |
| target_os = <span class="string">"android"</span>, |
| target_os = <span class="string">"emscripten"</span>, |
| target_os = <span class="string">"fuchsia"</span>, |
| target_os = <span class="string">"linux" |
| </span>))] |
| </span>Signal::SIGPWR => <span class="string">"SIGPWR"</span>, |
| Signal::SIGSYS => <span class="string">"SIGSYS"</span>, |
| <span class="attribute">#[cfg(not(any( |
| target_os = <span class="string">"android"</span>, |
| target_os = <span class="string">"emscripten"</span>, |
| target_os = <span class="string">"fuchsia"</span>, |
| target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"redox"</span>, |
| target_os = <span class="string">"haiku" |
| </span>)))] |
| </span>Signal::SIGEMT => <span class="string">"SIGEMT"</span>, |
| <span class="attribute">#[cfg(not(any( |
| target_os = <span class="string">"android"</span>, |
| target_os = <span class="string">"emscripten"</span>, |
| target_os = <span class="string">"fuchsia"</span>, |
| target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"redox"</span>, |
| target_os = <span class="string">"haiku" |
| </span>)))] |
| </span>Signal::SIGINFO => <span class="string">"SIGINFO"</span>, |
| } |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"signal"</span>)] |
| </span><span class="kw">impl </span>AsRef<str> <span class="kw">for </span>Signal { |
| <span class="kw">fn </span>as_ref(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>str { |
| <span class="self">self</span>.as_str() |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"signal"</span>)] |
| </span><span class="kw">impl </span>fmt::Display <span class="kw">for </span>Signal { |
| <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 { |
| f.write_str(<span class="self">self</span>.as_ref()) |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"signal"</span>)] |
| </span><span class="kw">pub use </span><span class="self">self</span>::Signal::<span class="kw-2">*</span>; |
| |
| <span class="attribute">#[cfg(target_os = <span class="string">"redox"</span>)] |
| #[cfg(feature = <span class="string">"signal"</span>)] |
| </span><span class="kw">const </span>SIGNALS: [Signal; <span class="number">29</span>] = [ |
| SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGTRAP, SIGABRT, SIGBUS, SIGFPE, SIGKILL, |
| SIGUSR1, SIGSEGV, SIGUSR2, SIGPIPE, SIGALRM, SIGTERM, SIGCHLD, SIGCONT, |
| SIGSTOP, SIGTSTP, SIGTTIN, SIGTTOU, SIGURG, SIGXCPU, SIGXFSZ, SIGVTALRM, |
| SIGPROF, SIGWINCH, SIGIO, SIGSYS, |
| ]; |
| <span class="attribute">#[cfg(target_os = <span class="string">"haiku"</span>)] |
| #[cfg(feature = <span class="string">"signal"</span>)] |
| </span><span class="kw">const </span>SIGNALS: [Signal; <span class="number">28</span>] = [ |
| SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGTRAP, SIGABRT, SIGBUS, SIGFPE, SIGKILL, |
| SIGUSR1, SIGSEGV, SIGUSR2, SIGPIPE, SIGALRM, SIGTERM, SIGCHLD, SIGCONT, |
| SIGSTOP, SIGTSTP, SIGTTIN, SIGTTOU, SIGURG, SIGXCPU, SIGXFSZ, SIGVTALRM, |
| SIGPROF, SIGWINCH, SIGSYS, |
| ]; |
| <span class="attribute">#[cfg(all( |
| 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">"fuchsia" |
| </span>), |
| not(any( |
| target_arch = <span class="string">"mips"</span>, |
| target_arch = <span class="string">"mips64"</span>, |
| target_arch = <span class="string">"sparc64" |
| </span>)) |
| ))] |
| #[cfg(feature = <span class="string">"signal"</span>)] |
| </span><span class="kw">const </span>SIGNALS: [Signal; <span class="number">31</span>] = [ |
| SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGTRAP, SIGABRT, SIGBUS, SIGFPE, SIGKILL, |
| SIGUSR1, SIGSEGV, SIGUSR2, SIGPIPE, SIGALRM, SIGTERM, SIGSTKFLT, SIGCHLD, |
| SIGCONT, SIGSTOP, SIGTSTP, SIGTTIN, SIGTTOU, SIGURG, SIGXCPU, SIGXFSZ, |
| SIGVTALRM, SIGPROF, SIGWINCH, SIGIO, SIGPWR, SIGSYS, |
| ]; |
| <span class="attribute">#[cfg(all( |
| 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">"fuchsia" |
| </span>), |
| any(target_arch = <span class="string">"mips"</span>, target_arch = <span class="string">"mips64"</span>, target_arch = <span class="string">"sparc64"</span>) |
| ))] |
| #[cfg(feature = <span class="string">"signal"</span>)] |
| </span><span class="kw">const </span>SIGNALS: [Signal; <span class="number">30</span>] = [ |
| SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGTRAP, SIGABRT, SIGBUS, SIGFPE, SIGKILL, |
| SIGUSR1, SIGSEGV, SIGUSR2, SIGPIPE, SIGALRM, SIGTERM, SIGCHLD, SIGCONT, |
| SIGSTOP, SIGTSTP, SIGTTIN, SIGTTOU, SIGURG, SIGXCPU, SIGXFSZ, SIGVTALRM, |
| SIGPROF, SIGWINCH, SIGIO, SIGPWR, SIGSYS, |
| ]; |
| <span class="attribute">#[cfg(not(any( |
| target_os = <span class="string">"linux"</span>, |
| target_os = <span class="string">"android"</span>, |
| target_os = <span class="string">"fuchsia"</span>, |
| target_os = <span class="string">"emscripten"</span>, |
| target_os = <span class="string">"redox"</span>, |
| target_os = <span class="string">"haiku" |
| </span>)))] |
| #[cfg(feature = <span class="string">"signal"</span>)] |
| </span><span class="kw">const </span>SIGNALS: [Signal; <span class="number">31</span>] = [ |
| SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGTRAP, SIGABRT, SIGBUS, SIGFPE, SIGKILL, |
| SIGUSR1, SIGSEGV, SIGUSR2, SIGPIPE, SIGALRM, SIGTERM, SIGCHLD, SIGCONT, |
| SIGSTOP, SIGTSTP, SIGTTIN, SIGTTOU, SIGURG, SIGXCPU, SIGXFSZ, SIGVTALRM, |
| SIGPROF, SIGWINCH, SIGIO, SIGSYS, SIGEMT, SIGINFO, |
| ]; |
| |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![feature = <span class="string">"signal"</span>] |
| |
| #[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)] |
| </span><span class="doccomment">/// Iterate through all signals defined by this operating system |
| </span><span class="kw">pub struct </span>SignalIterator { |
| next: usize, |
| } |
| |
| <span class="kw">impl </span>Iterator <span class="kw">for </span>SignalIterator { |
| <span class="kw">type </span>Item = Signal; |
| |
| <span class="kw">fn </span>next(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><Signal> { |
| <span class="kw">if </span><span class="self">self</span>.next < SIGNALS.len() { |
| <span class="kw">let </span>next_signal = SIGNALS[<span class="self">self</span>.next]; |
| <span class="self">self</span>.next += <span class="number">1</span>; |
| <span class="prelude-val">Some</span>(next_signal) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">None |
| </span>} |
| } |
| } |
| |
| <span class="kw">impl </span>Signal { |
| <span class="doccomment">/// Iterate through all signals defined by this OS |
| </span><span class="kw">pub const fn </span>iterator() -> SignalIterator { |
| SignalIterator{next: <span class="number">0</span>} |
| } |
| } |
| |
| <span class="doccomment">/// Alias for [`SIGABRT`] |
| </span><span class="kw">pub const </span>SIGIOT : Signal = SIGABRT; |
| <span class="doccomment">/// Alias for [`SIGIO`] |
| </span><span class="attribute">#[cfg(not(target_os = <span class="string">"haiku"</span>))] |
| </span><span class="kw">pub const </span>SIGPOLL : Signal = SIGIO; |
| <span class="doccomment">/// Alias for [`SIGSYS`] |
| </span><span class="kw">pub const </span>SIGUNUSED : Signal = SIGSYS; |
| |
| <span class="macro">cfg_if! </span>{ |
| <span class="kw">if </span><span class="attribute">#[cfg(target_os = <span class="string">"redox"</span>)] </span>{ |
| <span class="kw">type </span>SaFlags_t = libc::c_ulong; |
| } <span class="kw">else if </span><span class="attribute">#[cfg(target_env = <span class="string">"uclibc"</span>)] </span>{ |
| <span class="kw">type </span>SaFlags_t = libc::c_ulong; |
| } <span class="kw">else </span>{ |
| <span class="kw">type </span>SaFlags_t = libc::c_int; |
| } |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"signal"</span>)] |
| </span><span class="macro">libc_bitflags! </span>{ |
| <span class="doccomment">/// Controls the behavior of a [`SigAction`] |
| </span><span class="attribute">#[cfg_attr(docsrs, doc(cfg(feature = <span class="string">"signal"</span>)))] |
| </span><span class="kw">pub struct </span>SaFlags: SaFlags_t { |
| <span class="doccomment">/// When catching a [`Signal::SIGCHLD`] signal, the signal will be |
| /// generated only when a child process exits, not when a child process |
| /// stops. |
| </span>SA_NOCLDSTOP; |
| <span class="doccomment">/// When catching a [`Signal::SIGCHLD`] signal, the system will not |
| /// create zombie processes when children of the calling process exit. |
| </span>SA_NOCLDWAIT; |
| <span class="doccomment">/// Further occurrences of the delivered signal are not masked during |
| /// the execution of the handler. |
| </span>SA_NODEFER; |
| <span class="doccomment">/// The system will deliver the signal to the process on a signal stack, |
| /// specified by each thread with sigaltstack(2). |
| </span>SA_ONSTACK; |
| <span class="doccomment">/// The handler is reset back to the default at the moment the signal is |
| /// delivered. |
| </span>SA_RESETHAND; |
| <span class="doccomment">/// Requests that certain system calls restart if interrupted by this |
| /// signal. See the man page for complete details. |
| </span>SA_RESTART; |
| <span class="doccomment">/// This flag is controlled internally by Nix. |
| </span>SA_SIGINFO; |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"signal"</span>)] |
| </span><span class="macro">libc_enum! </span>{ |
| <span class="doccomment">/// Specifies how certain functions should manipulate a signal mask |
| </span><span class="attribute">#[repr(i32)] |
| #[non_exhaustive] |
| #[cfg_attr(docsrs, doc(cfg(feature = <span class="string">"signal"</span>)))] |
| </span><span class="kw">pub enum </span>SigmaskHow { |
| <span class="doccomment">/// The new mask is the union of the current mask and the specified set. |
| </span>SIG_BLOCK, |
| <span class="doccomment">/// The new mask is the intersection of the current mask and the |
| /// complement of the specified set. |
| </span>SIG_UNBLOCK, |
| <span class="doccomment">/// The current mask is replaced by the specified set. |
| </span>SIG_SETMASK, |
| } |
| } |
| |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![feature = <span class="string">"signal"</span>] |
| |
| </span><span class="kw">use </span><span class="kw">crate</span>::unistd::Pid; |
| <span class="kw">use </span>std::iter::Extend; |
| <span class="kw">use </span>std::iter::FromIterator; |
| <span class="kw">use </span>std::iter::IntoIterator; |
| |
| <span class="doccomment">/// Specifies a set of [`Signal`]s that may be blocked, waited for, etc. |
| </span><span class="comment">// We are using `transparent` here to be super sure that `SigSet` |
| // is represented exactly like the `sigset_t` struct from C. |
| </span><span class="attribute">#[repr(transparent)] |
| #[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)] |
| </span><span class="kw">pub struct </span>SigSet { |
| sigset: libc::sigset_t |
| } |
| |
| <span class="kw">impl </span>SigSet { |
| <span class="doccomment">/// Initialize to include all signals. |
| </span><span class="attribute">#[doc(alias(<span class="string">"sigfillset"</span>))] |
| </span><span class="kw">pub fn </span>all() -> SigSet { |
| <span class="kw">let </span><span class="kw-2">mut </span>sigset = mem::MaybeUninit::uninit(); |
| <span class="kw">let _ </span>= <span class="kw">unsafe </span>{ libc::sigfillset(sigset.as_mut_ptr()) }; |
| |
| <span class="kw">unsafe</span>{ SigSet { sigset: sigset.assume_init() } } |
| } |
| |
| <span class="doccomment">/// Initialize to include nothing. |
| </span><span class="attribute">#[doc(alias(<span class="string">"sigemptyset"</span>))] |
| </span><span class="kw">pub fn </span>empty() -> SigSet { |
| <span class="kw">let </span><span class="kw-2">mut </span>sigset = mem::MaybeUninit::uninit(); |
| <span class="kw">let _ </span>= <span class="kw">unsafe </span>{ libc::sigemptyset(sigset.as_mut_ptr()) }; |
| |
| <span class="kw">unsafe</span>{ SigSet { sigset: sigset.assume_init() } } |
| } |
| |
| <span class="doccomment">/// Add the specified signal to the set. |
| </span><span class="attribute">#[doc(alias(<span class="string">"sigaddset"</span>))] |
| </span><span class="kw">pub fn </span>add(<span class="kw-2">&mut </span><span class="self">self</span>, signal: Signal) { |
| <span class="kw">unsafe </span>{ libc::sigaddset(<span class="kw-2">&mut </span><span class="self">self</span>.sigset <span class="kw">as </span><span class="kw-2">*mut </span>libc::sigset_t, signal <span class="kw">as </span>libc::c_int) }; |
| } |
| |
| <span class="doccomment">/// Remove all signals from this set. |
| </span><span class="attribute">#[doc(alias(<span class="string">"sigemptyset"</span>))] |
| </span><span class="kw">pub fn </span>clear(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="kw">unsafe </span>{ libc::sigemptyset(<span class="kw-2">&mut </span><span class="self">self</span>.sigset <span class="kw">as </span><span class="kw-2">*mut </span>libc::sigset_t) }; |
| } |
| |
| <span class="doccomment">/// Remove the specified signal from this set. |
| </span><span class="attribute">#[doc(alias(<span class="string">"sigdelset"</span>))] |
| </span><span class="kw">pub fn </span>remove(<span class="kw-2">&mut </span><span class="self">self</span>, signal: Signal) { |
| <span class="kw">unsafe </span>{ libc::sigdelset(<span class="kw-2">&mut </span><span class="self">self</span>.sigset <span class="kw">as </span><span class="kw-2">*mut </span>libc::sigset_t, signal <span class="kw">as </span>libc::c_int) }; |
| } |
| |
| <span class="doccomment">/// Return whether this set includes the specified signal. |
| </span><span class="attribute">#[doc(alias(<span class="string">"sigismember"</span>))] |
| </span><span class="kw">pub fn </span>contains(<span class="kw-2">&</span><span class="self">self</span>, signal: Signal) -> bool { |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::sigismember(<span class="kw-2">&</span><span class="self">self</span>.sigset <span class="kw">as </span><span class="kw-2">*const </span>libc::sigset_t, signal <span class="kw">as </span>libc::c_int) }; |
| |
| <span class="kw">match </span>res { |
| <span class="number">1 </span>=> <span class="bool-val">true</span>, |
| <span class="number">0 </span>=> <span class="bool-val">false</span>, |
| <span class="kw">_ </span>=> <span class="macro">unreachable!</span>(<span class="string">"unexpected value from sigismember"</span>), |
| } |
| } |
| |
| <span class="doccomment">/// Returns an iterator that yields the signals contained in this set. |
| </span><span class="kw">pub fn </span>iter(<span class="kw-2">&</span><span class="self">self</span>) -> SigSetIter<<span class="lifetime">'_</span>> { |
| <span class="self">self</span>.into_iter() |
| } |
| |
| <span class="doccomment">/// Gets the currently blocked (masked) set of signals for the calling thread. |
| </span><span class="kw">pub fn </span>thread_get_mask() -> <span class="prelude-ty">Result</span><SigSet> { |
| <span class="kw">let </span><span class="kw-2">mut </span>oldmask = mem::MaybeUninit::uninit(); |
| do_pthread_sigmask(SigmaskHow::SIG_SETMASK, <span class="prelude-val">None</span>, <span class="prelude-val">Some</span>(oldmask.as_mut_ptr()))<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(<span class="kw">unsafe</span>{ SigSet{sigset: oldmask.assume_init()}}) |
| } |
| |
| <span class="doccomment">/// Sets the set of signals as the signal mask for the calling thread. |
| </span><span class="kw">pub fn </span>thread_set_mask(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Result</span><()> { |
| pthread_sigmask(SigmaskHow::SIG_SETMASK, <span class="prelude-val">Some</span>(<span class="self">self</span>), <span class="prelude-val">None</span>) |
| } |
| |
| <span class="doccomment">/// Adds the set of signals to the signal mask for the calling thread. |
| </span><span class="kw">pub fn </span>thread_block(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Result</span><()> { |
| pthread_sigmask(SigmaskHow::SIG_BLOCK, <span class="prelude-val">Some</span>(<span class="self">self</span>), <span class="prelude-val">None</span>) |
| } |
| |
| <span class="doccomment">/// Removes the set of signals from the signal mask for the calling thread. |
| </span><span class="kw">pub fn </span>thread_unblock(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Result</span><()> { |
| pthread_sigmask(SigmaskHow::SIG_UNBLOCK, <span class="prelude-val">Some</span>(<span class="self">self</span>), <span class="prelude-val">None</span>) |
| } |
| |
| <span class="doccomment">/// Sets the set of signals as the signal mask, and returns the old mask. |
| </span><span class="kw">pub fn </span>thread_swap_mask(<span class="kw-2">&</span><span class="self">self</span>, how: SigmaskHow) -> <span class="prelude-ty">Result</span><SigSet> { |
| <span class="kw">let </span><span class="kw-2">mut </span>oldmask = mem::MaybeUninit::uninit(); |
| do_pthread_sigmask(how, <span class="prelude-val">Some</span>(<span class="self">self</span>), <span class="prelude-val">Some</span>(oldmask.as_mut_ptr()))<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(<span class="kw">unsafe</span>{ SigSet{sigset: oldmask.assume_init()}}) |
| } |
| |
| <span class="doccomment">/// Suspends execution of the calling thread until one of the signals in the |
| /// signal mask becomes pending, and returns the accepted signal. |
| </span><span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] </span><span class="comment">// RedoxFS does not yet support sigwait |
| </span><span class="attribute">#[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="kw">pub fn </span>wait(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Result</span><Signal> { |
| <span class="kw">use </span>std::convert::TryFrom; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>signum = mem::MaybeUninit::uninit(); |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::sigwait(<span class="kw-2">&</span><span class="self">self</span>.sigset <span class="kw">as </span><span class="kw-2">*const </span>libc::sigset_t, signum.as_mut_ptr()) }; |
| |
| Errno::result(res).map(|<span class="kw">_</span>| <span class="kw">unsafe </span>{ |
| Signal::try_from(signum.assume_init()).unwrap() |
| }) |
| } |
| |
| <span class="doccomment">/// Converts a `libc::sigset_t` object to a [`SigSet`] without checking whether the |
| /// `libc::sigset_t` is already initialized. |
| /// |
| /// # Safety |
| /// |
| /// The `sigset` passed in must be a valid an initialized `libc::sigset_t` by calling either |
| /// [`sigemptyset(3)`](https://man7.org/linux/man-pages/man3/sigemptyset.3p.html) or |
| /// [`sigfillset(3)`](https://man7.org/linux/man-pages/man3/sigfillset.3p.html). |
| /// Otherwise, the results are undefined. |
| </span><span class="kw">pub unsafe fn </span>from_sigset_t_unchecked(sigset: libc::sigset_t) -> SigSet { |
| SigSet { sigset } |
| } |
| } |
| |
| <span class="kw">impl </span>AsRef<libc::sigset_t> <span class="kw">for </span>SigSet { |
| <span class="kw">fn </span>as_ref(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>libc::sigset_t { |
| <span class="kw-2">&</span><span class="self">self</span>.sigset |
| } |
| } |
| |
| <span class="comment">// TODO: Consider specialization for the case where T is &SigSet and libc::sigorset is available. |
| </span><span class="kw">impl </span>Extend<Signal> <span class="kw">for </span>SigSet { |
| <span class="kw">fn </span>extend<T>(<span class="kw-2">&mut </span><span class="self">self</span>, iter: T) |
| <span class="kw">where </span>T: IntoIterator<Item = Signal> { |
| <span class="kw">for </span>signal <span class="kw">in </span>iter { |
| <span class="self">self</span>.add(signal); |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>FromIterator<Signal> <span class="kw">for </span>SigSet { |
| <span class="kw">fn </span>from_iter<T>(iter: T) -> <span class="self">Self |
| </span><span class="kw">where </span>T: IntoIterator<Item = Signal> { |
| <span class="kw">let </span><span class="kw-2">mut </span>sigset = SigSet::empty(); |
| sigset.extend(iter); |
| sigset |
| } |
| } |
| |
| <span class="doccomment">/// Iterator for a [`SigSet`]. |
| /// |
| /// Call [`SigSet::iter`] to create an iterator. |
| </span><span class="attribute">#[derive(Clone, Debug)] |
| </span><span class="kw">pub struct </span>SigSetIter<<span class="lifetime">'a</span>> { |
| sigset: <span class="kw-2">&</span><span class="lifetime">'a </span>SigSet, |
| inner: SignalIterator, |
| } |
| |
| <span class="kw">impl </span>Iterator <span class="kw">for </span>SigSetIter<<span class="lifetime">'_</span>> { |
| <span class="kw">type </span>Item = Signal; |
| <span class="kw">fn </span>next(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><Signal> { |
| <span class="kw">loop </span>{ |
| <span class="kw">match </span><span class="self">self</span>.inner.next() { |
| <span class="prelude-val">None </span>=> <span class="kw">return </span><span class="prelude-val">None</span>, |
| <span class="prelude-val">Some</span>(signal) <span class="kw">if </span><span class="self">self</span>.sigset.contains(signal) => <span class="kw">return </span><span class="prelude-val">Some</span>(signal), |
| <span class="prelude-val">Some</span>(_signal) => <span class="kw">continue</span>, |
| } |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>> IntoIterator <span class="kw">for </span><span class="kw-2">&</span><span class="lifetime">'a </span>SigSet { |
| <span class="kw">type </span>Item = Signal; |
| <span class="kw">type </span>IntoIter = SigSetIter<<span class="lifetime">'a</span>>; |
| <span class="kw">fn </span>into_iter(<span class="self">self</span>) -> <span class="self">Self</span>::IntoIter { |
| SigSetIter { sigset: <span class="self">self</span>, inner: Signal::iterator() } |
| } |
| } |
| |
| <span class="doccomment">/// A signal handler. |
| </span><span class="attribute">#[allow(unknown_lints)] |
| #[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)] |
| </span><span class="kw">pub enum </span>SigHandler { |
| <span class="doccomment">/// Default signal handling. |
| </span>SigDfl, |
| <span class="doccomment">/// Request that the signal be ignored. |
| </span>SigIgn, |
| <span class="doccomment">/// Use the given signal-catching function, which takes in the signal. |
| </span>Handler(<span class="kw">extern fn</span>(libc::c_int)), |
| <span class="doccomment">/// Use the given signal-catching function, which takes in the signal, information about how |
| /// the signal was generated, and a pointer to the threads `ucontext_t`. |
| </span><span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>SigAction(<span class="kw">extern fn</span>(libc::c_int, <span class="kw-2">*mut </span>libc::siginfo_t, <span class="kw-2">*mut </span>libc::c_void)) |
| } |
| |
| <span class="doccomment">/// Action to take on receipt of a signal. Corresponds to `sigaction`. |
| </span><span class="attribute">#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)] |
| </span><span class="kw">pub struct </span>SigAction { |
| sigaction: libc::sigaction |
| } |
| |
| <span class="kw">impl </span>SigAction { |
| <span class="doccomment">/// Creates a new action. |
| /// |
| /// The `SA_SIGINFO` bit in the `flags` argument is ignored (it will be set only if `handler` |
| /// is the `SigAction` variant). `mask` specifies other signals to block during execution of |
| /// the signal-catching function. |
| </span><span class="kw">pub fn </span>new(handler: SigHandler, flags: SaFlags, mask: SigSet) -> SigAction { |
| <span class="kw">unsafe fn </span>install_sig(p: <span class="kw-2">*mut </span>libc::sigaction, handler: SigHandler) { |
| (<span class="kw-2">*</span>p).sa_sigaction = <span class="kw">match </span>handler { |
| SigHandler::SigDfl => libc::SIG_DFL, |
| SigHandler::SigIgn => libc::SIG_IGN, |
| SigHandler::Handler(f) => f <span class="kw">as </span><span class="kw-2">*const </span><span class="kw">extern fn</span>(libc::c_int) <span class="kw">as </span>usize, |
| <span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| </span>SigHandler::SigAction(f) => f <span class="kw">as </span><span class="kw-2">*const </span><span class="kw">extern fn</span>(libc::c_int, <span class="kw-2">*mut </span>libc::siginfo_t, <span class="kw-2">*mut </span>libc::c_void) <span class="kw">as </span>usize, |
| }; |
| } |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>s = mem::MaybeUninit::<libc::sigaction>::uninit(); |
| <span class="kw">unsafe </span>{ |
| <span class="kw">let </span>p = s.as_mut_ptr(); |
| install_sig(p, handler); |
| (<span class="kw-2">*</span>p).sa_flags = <span class="kw">match </span>handler { |
| <span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| </span>SigHandler::SigAction(<span class="kw">_</span>) => (flags | SaFlags::SA_SIGINFO).bits(), |
| <span class="kw">_ </span>=> (flags - SaFlags::SA_SIGINFO).bits(), |
| }; |
| (<span class="kw-2">*</span>p).sa_mask = mask.sigset; |
| |
| SigAction { sigaction: s.assume_init() } |
| } |
| } |
| |
| <span class="doccomment">/// Returns the flags set on the action. |
| </span><span class="kw">pub fn </span>flags(<span class="kw-2">&</span><span class="self">self</span>) -> SaFlags { |
| SaFlags::from_bits_truncate(<span class="self">self</span>.sigaction.sa_flags) |
| } |
| |
| <span class="doccomment">/// Returns the set of signals that are blocked during execution of the action's |
| /// signal-catching function. |
| </span><span class="kw">pub fn </span>mask(<span class="kw-2">&</span><span class="self">self</span>) -> SigSet { |
| SigSet { sigset: <span class="self">self</span>.sigaction.sa_mask } |
| } |
| |
| <span class="doccomment">/// Returns the action's handler. |
| </span><span class="kw">pub fn </span>handler(<span class="kw-2">&</span><span class="self">self</span>) -> SigHandler { |
| <span class="kw">match </span><span class="self">self</span>.sigaction.sa_sigaction { |
| libc::SIG_DFL => SigHandler::SigDfl, |
| libc::SIG_IGN => SigHandler::SigIgn, |
| <span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| </span>p <span class="kw">if </span><span class="self">self</span>.flags().contains(SaFlags::SA_SIGINFO) => |
| SigHandler::SigAction( |
| <span class="comment">// Safe for one of two reasons: |
| // * The SigHandler was created by SigHandler::new, in which |
| // case the pointer is correct, or |
| // * The SigHandler was created by signal or sigaction, which |
| // are unsafe functions, so the caller should've somehow |
| // ensured that it is correctly initialized. |
| </span><span class="kw">unsafe</span>{ |
| <span class="kw-2">*</span>(<span class="kw-2">&</span>p <span class="kw">as </span><span class="kw-2">*const </span>usize |
| <span class="kw">as </span><span class="kw-2">*const </span><span class="kw">extern fn</span>(<span class="kw">_</span>, <span class="kw">_</span>, <span class="kw">_</span>)) |
| } |
| <span class="kw">as extern fn</span>(<span class="kw">_</span>, <span class="kw">_</span>, <span class="kw">_</span>)), |
| p => SigHandler::Handler( |
| <span class="comment">// Safe for one of two reasons: |
| // * The SigHandler was created by SigHandler::new, in which |
| // case the pointer is correct, or |
| // * The SigHandler was created by signal or sigaction, which |
| // are unsafe functions, so the caller should've somehow |
| // ensured that it is correctly initialized. |
| </span><span class="kw">unsafe</span>{ |
| <span class="kw-2">*</span>(<span class="kw-2">&</span>p <span class="kw">as </span><span class="kw-2">*const </span>usize |
| <span class="kw">as </span><span class="kw-2">*const </span><span class="kw">extern fn</span>(libc::c_int)) |
| } |
| <span class="kw">as extern fn</span>(libc::c_int)), |
| } |
| } |
| } |
| |
| <span class="doccomment">/// Changes the action taken by a process on receipt of a specific signal. |
| /// |
| /// `signal` can be any signal except `SIGKILL` or `SIGSTOP`. On success, it returns the previous |
| /// action for the given signal. If `sigaction` fails, no new signal handler is installed. |
| /// |
| /// # Safety |
| /// |
| /// * Signal handlers may be called at any point during execution, which limits |
| /// what is safe to do in the body of the signal-catching function. Be certain |
| /// to only make syscalls that are explicitly marked safe for signal handlers |
| /// and only share global data using atomics. |
| /// |
| /// * There is also no guarantee that the old signal handler was installed |
| /// correctly. If it was installed by this crate, it will be. But if it was |
| /// installed by, for example, C code, then there is no guarantee its function |
| /// pointer is valid. In that case, this function effectively dereferences a |
| /// raw pointer of unknown provenance. |
| </span><span class="kw">pub unsafe fn </span>sigaction(signal: Signal, sigaction: <span class="kw-2">&</span>SigAction) -> <span class="prelude-ty">Result</span><SigAction> { |
| <span class="kw">let </span><span class="kw-2">mut </span>oldact = mem::MaybeUninit::<libc::sigaction>::uninit(); |
| |
| <span class="kw">let </span>res = libc::sigaction(signal <span class="kw">as </span>libc::c_int, |
| <span class="kw-2">&</span>sigaction.sigaction <span class="kw">as </span><span class="kw-2">*const </span>libc::sigaction, |
| oldact.as_mut_ptr()); |
| |
| Errno::result(res).map(|<span class="kw">_</span>| SigAction { sigaction: oldact.assume_init() }) |
| } |
| |
| <span class="doccomment">/// Signal management (see [signal(3p)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/signal.html)) |
| /// |
| /// Installs `handler` for the given `signal`, returning the previous signal |
| /// handler. `signal` should only be used following another call to `signal` or |
| /// if the current handler is the default. The return value of `signal` is |
| /// undefined after setting the handler with [`sigaction`][SigActionFn]. |
| /// |
| /// # Safety |
| /// |
| /// If the pointer to the previous signal handler is invalid, undefined |
| /// behavior could be invoked when casting it back to a [`SigAction`][SigActionStruct]. |
| /// |
| /// # Examples |
| /// |
| /// Ignore `SIGINT`: |
| /// |
| /// ```no_run |
| /// # use nix::sys::signal::{self, Signal, SigHandler}; |
| /// unsafe { signal::signal(Signal::SIGINT, SigHandler::SigIgn) }.unwrap(); |
| /// ``` |
| /// |
| /// Use a signal handler to set a flag variable: |
| /// |
| /// ```no_run |
| /// # #[macro_use] extern crate lazy_static; |
| /// # use std::convert::TryFrom; |
| /// # use std::sync::atomic::{AtomicBool, Ordering}; |
| /// # use nix::sys::signal::{self, Signal, SigHandler}; |
| /// lazy_static! { |
| /// static ref SIGNALED: AtomicBool = AtomicBool::new(false); |
| /// } |
| /// |
| /// extern fn handle_sigint(signal: libc::c_int) { |
| /// let signal = Signal::try_from(signal).unwrap(); |
| /// SIGNALED.store(signal == Signal::SIGINT, Ordering::Relaxed); |
| /// } |
| /// |
| /// fn main() { |
| /// let handler = SigHandler::Handler(handle_sigint); |
| /// unsafe { signal::signal(Signal::SIGINT, handler) }.unwrap(); |
| /// } |
| /// ``` |
| /// |
| /// # Errors |
| /// |
| /// Returns [`Error(Errno::EOPNOTSUPP)`] if `handler` is |
| /// [`SigAction`][SigActionStruct]. Use [`sigaction`][SigActionFn] instead. |
| /// |
| /// `signal` also returns any error from `libc::signal`, such as when an attempt |
| /// is made to catch a signal that cannot be caught or to ignore a signal that |
| /// cannot be ignored. |
| /// |
| /// [`Error::UnsupportedOperation`]: ../../enum.Error.html#variant.UnsupportedOperation |
| /// [SigActionStruct]: struct.SigAction.html |
| /// [sigactionFn]: fn.sigaction.html |
| </span><span class="kw">pub unsafe fn </span>signal(signal: Signal, handler: SigHandler) -> <span class="prelude-ty">Result</span><SigHandler> { |
| <span class="kw">let </span>signal = signal <span class="kw">as </span>libc::c_int; |
| <span class="kw">let </span>res = <span class="kw">match </span>handler { |
| SigHandler::SigDfl => libc::signal(signal, libc::SIG_DFL), |
| SigHandler::SigIgn => libc::signal(signal, libc::SIG_IGN), |
| SigHandler::Handler(handler) => libc::signal(signal, handler <span class="kw">as </span>libc::sighandler_t), |
| <span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| </span>SigHandler::SigAction(<span class="kw">_</span>) => <span class="kw">return </span><span class="prelude-val">Err</span>(Errno::ENOTSUP), |
| }; |
| Errno::result(res).map(|oldhandler| { |
| <span class="kw">match </span>oldhandler { |
| libc::SIG_DFL => SigHandler::SigDfl, |
| libc::SIG_IGN => SigHandler::SigIgn, |
| p => SigHandler::Handler( |
| <span class="kw-2">*</span>(<span class="kw-2">&</span>p <span class="kw">as </span><span class="kw-2">*const </span>usize |
| <span class="kw">as </span><span class="kw-2">*const </span><span class="kw">extern fn</span>(libc::c_int)) |
| <span class="kw">as extern fn</span>(libc::c_int)), |
| } |
| }) |
| } |
| |
| <span class="kw">fn </span>do_pthread_sigmask(how: SigmaskHow, |
| set: <span class="prelude-ty">Option</span><<span class="kw-2">&</span>SigSet>, |
| oldset: <span class="prelude-ty">Option</span><<span class="kw-2">*mut </span>libc::sigset_t>) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">if </span>set.is_none() && oldset.is_none() { |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ |
| <span class="comment">// if set or oldset is None, pass in null pointers instead |
| </span>libc::pthread_sigmask(how <span class="kw">as </span>libc::c_int, |
| set.map_or_else(ptr::null::<libc::sigset_t>, |
| |s| <span class="kw-2">&</span>s.sigset <span class="kw">as </span><span class="kw-2">*const </span>libc::sigset_t), |
| oldset.unwrap_or(ptr::null_mut()) |
| ) |
| }; |
| |
| Errno::result(res).map(drop) |
| } |
| |
| <span class="doccomment">/// Manages the signal mask (set of blocked signals) for the calling thread. |
| /// |
| /// If the `set` parameter is `Some(..)`, then the signal mask will be updated with the signal set. |
| /// The `how` flag decides the type of update. If `set` is `None`, `how` will be ignored, |
| /// and no modification will take place. |
| /// |
| /// If the 'oldset' parameter is `Some(..)` then the current signal mask will be written into it. |
| /// |
| /// If both `set` and `oldset` is `Some(..)`, the current signal mask will be written into oldset, |
| /// and then it will be updated with `set`. |
| /// |
| /// If both `set` and `oldset` is None, this function is a no-op. |
| /// |
| /// For more information, visit the [`pthread_sigmask`](https://pubs.opengroup.org/onlinepubs/9699919799/functions/pthread_sigmask.html), |
| /// or [`sigprocmask`](https://pubs.opengroup.org/onlinepubs/9699919799/functions/sigprocmask.html) man pages. |
| </span><span class="kw">pub fn </span>pthread_sigmask(how: SigmaskHow, |
| set: <span class="prelude-ty">Option</span><<span class="kw-2">&</span>SigSet>, |
| oldset: <span class="prelude-ty">Option</span><<span class="kw-2">&mut </span>SigSet>) -> <span class="prelude-ty">Result</span><()> |
| { |
| do_pthread_sigmask(how, set, oldset.map(|os| <span class="kw-2">&mut </span>os.sigset <span class="kw">as </span><span class="kw-2">*mut </span><span class="kw">_ </span>)) |
| } |
| |
| <span class="doccomment">/// Examine and change blocked signals. |
| /// |
| /// For more information see the [`sigprocmask` man |
| /// pages](https://pubs.opengroup.org/onlinepubs/9699919799/functions/sigprocmask.html). |
| </span><span class="kw">pub fn </span>sigprocmask(how: SigmaskHow, set: <span class="prelude-ty">Option</span><<span class="kw-2">&</span>SigSet>, oldset: <span class="prelude-ty">Option</span><<span class="kw-2">&mut </span>SigSet>) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">if </span>set.is_none() && oldset.is_none() { |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ |
| <span class="comment">// if set or oldset is None, pass in null pointers instead |
| </span>libc::sigprocmask(how <span class="kw">as </span>libc::c_int, |
| set.map_or_else(ptr::null::<libc::sigset_t>, |
| |s| <span class="kw-2">&</span>s.sigset <span class="kw">as </span><span class="kw-2">*const </span>libc::sigset_t), |
| oldset.map_or_else(ptr::null_mut::<libc::sigset_t>, |
| |os| <span class="kw-2">&mut </span>os.sigset <span class="kw">as </span><span class="kw-2">*mut </span>libc::sigset_t)) |
| }; |
| |
| Errno::result(res).map(drop) |
| } |
| |
| <span class="doccomment">/// Send a signal to a process |
| /// |
| /// # Arguments |
| /// |
| /// * `pid` - Specifies which processes should receive the signal. |
| /// - If positive, specifies an individual process. |
| /// - If zero, the signal will be sent to all processes whose group |
| /// ID is equal to the process group ID of the sender. This is a |
| </span><span class="attribute">#[cfg_attr(target_os = <span class="string">"fuchsia"</span>, doc = <span class="string">"variant of `killpg`."</span>)] |
| #[cfg_attr(not(target_os = <span class="string">"fuchsia"</span>), doc = <span class="string">"variant of [`killpg`]."</span>)] |
| </span><span class="doccomment">/// - If `-1` and the process has super-user privileges, the signal |
| /// is sent to all processes exclusing system processes. |
| /// - If less than `-1`, the signal is sent to all processes whose |
| /// process group ID is equal to the absolute value of `pid`. |
| /// * `signal` - Signal to send. If `None`, error checking is performed |
| /// but no signal is actually sent. |
| /// |
| /// See Also |
| /// [`kill(2)`](https://pubs.opengroup.org/onlinepubs/9699919799/functions/kill.html) |
| </span><span class="kw">pub fn </span>kill<T: Into<<span class="prelude-ty">Option</span><Signal>>>(pid: Pid, signal: T) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::kill(pid.into(), |
| <span class="kw">match </span>signal.into() { |
| <span class="prelude-val">Some</span>(s) => s <span class="kw">as </span>libc::c_int, |
| <span class="prelude-val">None </span>=> <span class="number">0</span>, |
| }) }; |
| |
| Errno::result(res).map(drop) |
| } |
| |
| <span class="doccomment">/// Send a signal to a process group |
| /// |
| /// # Arguments |
| /// |
| /// * `pgrp` - Process group to signal. If less then or equal 1, the behavior |
| /// is platform-specific. |
| /// * `signal` - Signal to send. If `None`, `killpg` will only preform error |
| /// checking and won't send any signal. |
| /// |
| /// See Also [killpg(3)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/killpg.html). |
| </span><span class="attribute">#[cfg(not(target_os = <span class="string">"fuchsia"</span>))] |
| </span><span class="kw">pub fn </span>killpg<T: Into<<span class="prelude-ty">Option</span><Signal>>>(pgrp: Pid, signal: T) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::killpg(pgrp.into(), |
| <span class="kw">match </span>signal.into() { |
| <span class="prelude-val">Some</span>(s) => s <span class="kw">as </span>libc::c_int, |
| <span class="prelude-val">None </span>=> <span class="number">0</span>, |
| }) }; |
| |
| Errno::result(res).map(drop) |
| } |
| |
| <span class="doccomment">/// Send a signal to the current thread |
| /// |
| /// See Also [raise(3)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/raise.html) |
| </span><span class="kw">pub fn </span>raise(signal: Signal) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>res = <span class="kw">unsafe </span>{ libc::raise(signal <span class="kw">as </span>libc::c_int) }; |
| |
| Errno::result(res).map(drop) |
| } |
| } |
| |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![any(feature = <span class="string">"aio"</span>, feature = <span class="string">"signal"</span>)] |
| |
| </span><span class="doccomment">/// Identifies a thread for [`SigevNotify::SigevThreadId`] |
| </span><span class="attribute">#[cfg(target_os = <span class="string">"freebsd"</span>)] |
| </span><span class="kw">pub type </span>type_of_thread_id = libc::lwpid_t; |
| <span class="doccomment">/// Identifies a thread for [`SigevNotify::SigevThreadId`] |
| </span><span class="attribute">#[cfg(target_os = <span class="string">"linux"</span>)] |
| </span><span class="kw">pub type </span>type_of_thread_id = libc::pid_t; |
| |
| <span class="doccomment">/// Specifies the notification method used by a [`SigEvent`] |
| </span><span class="comment">// sigval is actually a union of a int and a void*. But it's never really used |
| // as a pointer, because neither libc nor the kernel ever dereference it. nix |
| // therefore presents it as an intptr_t, which is how kevent uses it. |
| </span><span class="attribute">#[cfg(not(any(target_os = <span class="string">"openbsd"</span>, target_os = <span class="string">"redox"</span>)))] |
| #[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)] |
| </span><span class="kw">pub enum </span>SigevNotify { |
| <span class="doccomment">/// No notification will be delivered |
| </span>SigevNone, |
| <span class="doccomment">/// Notify by delivering a signal to the process. |
| </span>SigevSignal { |
| <span class="doccomment">/// Signal to deliver |
| </span>signal: Signal, |
| <span class="doccomment">/// Will be present in the `si_value` field of the [`libc::siginfo_t`] |
| /// structure of the queued signal. |
| </span>si_value: libc::intptr_t |
| }, |
| <span class="comment">// Note: SIGEV_THREAD is not implemented because libc::sigevent does not |
| // expose a way to set the union members needed by SIGEV_THREAD. |
| </span><span class="doccomment">/// Notify by delivering an event to a kqueue. |
| </span><span class="attribute">#[cfg(any(target_os = <span class="string">"dragonfly"</span>, target_os = <span class="string">"freebsd"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>SigevKevent { |
| <span class="doccomment">/// File descriptor of the kqueue to notify. |
| </span>kq: RawFd, |
| <span class="doccomment">/// Will be contained in the kevent's `udata` field. |
| </span>udata: libc::intptr_t |
| }, |
| <span class="doccomment">/// Notify by delivering a signal to a thread. |
| </span><span class="attribute">#[cfg(any(target_os = <span class="string">"freebsd"</span>, target_os = <span class="string">"linux"</span>))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span>SigevThreadId { |
| <span class="doccomment">/// Signal to send |
| </span>signal: Signal, |
| <span class="doccomment">/// LWP ID of the thread to notify |
| </span>thread_id: type_of_thread_id, |
| <span class="doccomment">/// Will be present in the `si_value` field of the [`libc::siginfo_t`] |
| /// structure of the queued signal. |
| </span>si_value: libc::intptr_t |
| }, |
| } |
| } |
| |
| <span class="attribute">#[cfg(not(any(target_os = <span class="string">"openbsd"</span>, target_os = <span class="string">"redox"</span>)))] |
| #[cfg_attr(docsrs, doc(cfg(all())))] |
| </span><span class="kw">mod </span>sigevent { |
| <span class="macro">feature! </span>{ |
| <span class="attribute">#![any(feature = <span class="string">"aio"</span>, feature = <span class="string">"signal"</span>)] |
| |
| </span><span class="kw">use </span>std::mem; |
| <span class="kw">use </span>std::ptr; |
| <span class="kw">use </span><span class="kw">super</span>::SigevNotify; |
| <span class="attribute">#[cfg(any(target_os = <span class="string">"freebsd"</span>, target_os = <span class="string">"linux"</span>))] |
| </span><span class="kw">use </span><span class="kw">super</span>::type_of_thread_id; |
| |
| <span class="doccomment">/// Used to request asynchronous notification of the completion of certain |
| /// events, such as POSIX AIO and timers. |
| </span><span class="attribute">#[repr(C)] |
| #[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)] |
| </span><span class="kw">pub struct </span>SigEvent { |
| sigevent: libc::sigevent |
| } |
| |
| <span class="kw">impl </span>SigEvent { |
| <span class="doccomment">/// **Note:** this constructor does not allow the user to set the |
| /// `sigev_notify_kevent_flags` field. That's considered ok because on FreeBSD |
| /// at least those flags don't do anything useful. That field is part of a |
| /// union that shares space with the more genuinely useful fields. |
| /// |
| /// **Note:** This constructor also doesn't allow the caller to set the |
| /// `sigev_notify_function` or `sigev_notify_attributes` fields, which are |
| /// required for `SIGEV_THREAD`. That's considered ok because on no operating |
| /// system is `SIGEV_THREAD` the most efficient way to deliver AIO |
| /// notification. FreeBSD and DragonFly BSD programs should prefer `SIGEV_KEVENT`. |
| /// Linux, Solaris, and portable programs should prefer `SIGEV_THREAD_ID` or |
| /// `SIGEV_SIGNAL`. That field is part of a union that shares space with the |
| /// more genuinely useful `sigev_notify_thread_id` |
| </span><span class="comment">// Allow invalid_value warning on Fuchsia only. |
| // See https://github.com/nix-rust/nix/issues/1441 |
| </span><span class="attribute">#[cfg_attr(target_os = <span class="string">"fuchsia"</span>, allow(invalid_value))] |
| </span><span class="kw">pub fn </span>new(sigev_notify: SigevNotify) -> SigEvent { |
| <span class="kw">let </span><span class="kw-2">mut </span>sev = <span class="kw">unsafe </span>{ mem::MaybeUninit::<libc::sigevent>::zeroed().assume_init() }; |
| sev.sigev_notify = <span class="kw">match </span>sigev_notify { |
| SigevNotify::SigevNone => libc::SIGEV_NONE, |
| SigevNotify::SigevSignal{..} => libc::SIGEV_SIGNAL, |
| <span class="attribute">#[cfg(any(target_os = <span class="string">"dragonfly"</span>, target_os = <span class="string">"freebsd"</span>))] |
| </span>SigevNotify::SigevKevent{..} => libc::SIGEV_KEVENT, |
| <span class="attribute">#[cfg(target_os = <span class="string">"freebsd"</span>)] |
| </span>SigevNotify::SigevThreadId{..} => libc::SIGEV_THREAD_ID, |
| <span class="attribute">#[cfg(all(target_os = <span class="string">"linux"</span>, target_env = <span class="string">"gnu"</span>, not(target_arch = <span class="string">"mips"</span>)))] |
| </span>SigevNotify::SigevThreadId{..} => libc::SIGEV_THREAD_ID, |
| <span class="attribute">#[cfg(all(target_os = <span class="string">"linux"</span>, target_env = <span class="string">"uclibc"</span>))] |
| </span>SigevNotify::SigevThreadId{..} => libc::SIGEV_THREAD_ID, |
| <span class="attribute">#[cfg(any(all(target_os = <span class="string">"linux"</span>, target_env = <span class="string">"musl"</span>), target_arch = <span class="string">"mips"</span>))] |
| </span>SigevNotify::SigevThreadId{..} => <span class="number">4 </span><span class="comment">// No SIGEV_THREAD_ID defined |
| </span>}; |
| sev.sigev_signo = <span class="kw">match </span>sigev_notify { |
| SigevNotify::SigevSignal{ signal, .. } => signal <span class="kw">as </span>libc::c_int, |
| <span class="attribute">#[cfg(any(target_os = <span class="string">"dragonfly"</span>, target_os = <span class="string">"freebsd"</span>))] |
| </span>SigevNotify::SigevKevent{ kq, ..} => kq, |
| <span class="attribute">#[cfg(any(target_os = <span class="string">"linux"</span>, target_os = <span class="string">"freebsd"</span>))] |
| </span>SigevNotify::SigevThreadId{ signal, .. } => signal <span class="kw">as </span>libc::c_int, |
| <span class="kw">_ </span>=> <span class="number">0 |
| </span>}; |
| sev.sigev_value.sival_ptr = <span class="kw">match </span>sigev_notify { |
| SigevNotify::SigevNone => ptr::null_mut::<libc::c_void>(), |
| SigevNotify::SigevSignal{ si_value, .. } => si_value <span class="kw">as </span><span class="kw-2">*mut </span>libc::c_void, |
| <span class="attribute">#[cfg(any(target_os = <span class="string">"dragonfly"</span>, target_os = <span class="string">"freebsd"</span>))] |
| </span>SigevNotify::SigevKevent{ udata, .. } => udata <span class="kw">as </span><span class="kw-2">*mut </span>libc::c_void, |
| <span class="attribute">#[cfg(any(target_os = <span class="string">"freebsd"</span>, target_os = <span class="string">"linux"</span>))] |
| </span>SigevNotify::SigevThreadId{ si_value, .. } => si_value <span class="kw">as </span><span class="kw-2">*mut </span>libc::c_void, |
| }; |
| SigEvent::set_tid(<span class="kw-2">&mut </span>sev, <span class="kw-2">&</span>sigev_notify); |
| SigEvent{sigevent: sev} |
| } |
| |
| <span class="attribute">#[cfg(any(target_os = <span class="string">"freebsd"</span>, target_os = <span class="string">"linux"</span>))] |
| </span><span class="kw">fn </span>set_tid(sev: <span class="kw-2">&mut </span>libc::sigevent, sigev_notify: <span class="kw-2">&</span>SigevNotify) { |
| sev.sigev_notify_thread_id = <span class="kw">match </span><span class="kw-2">*</span>sigev_notify { |
| SigevNotify::SigevThreadId { thread_id, .. } => thread_id, |
| <span class="kw">_ </span>=> <span class="number">0 </span><span class="kw">as </span>type_of_thread_id |
| }; |
| } |
| |
| <span class="attribute">#[cfg(not(any(target_os = <span class="string">"freebsd"</span>, target_os = <span class="string">"linux"</span>)))] |
| </span><span class="kw">fn </span>set_tid(_sev: <span class="kw-2">&mut </span>libc::sigevent, _sigev_notify: <span class="kw-2">&</span>SigevNotify) { |
| } |
| |
| <span class="doccomment">/// Return a copy of the inner structure |
| </span><span class="kw">pub fn </span>sigevent(<span class="kw-2">&</span><span class="self">self</span>) -> libc::sigevent { |
| <span class="self">self</span>.sigevent |
| } |
| |
| <span class="doccomment">/// Returns a mutable pointer to the `sigevent` wrapped by `self` |
| </span><span class="kw">pub fn </span>as_mut_ptr(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="kw-2">*mut </span>libc::sigevent { |
| <span class="kw-2">&mut </span><span class="self">self</span>.sigevent |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>> From<<span class="kw-2">&</span><span class="lifetime">'a </span>libc::sigevent> <span class="kw">for </span>SigEvent { |
| <span class="kw">fn </span>from(sigevent: <span class="kw-2">&</span>libc::sigevent) -> <span class="self">Self </span>{ |
| SigEvent{ sigevent: <span class="kw-2">*</span>sigevent } |
| } |
| } |
| } |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>tests { |
| <span class="kw">use super</span>::<span class="kw-2">*</span>; |
| <span class="attribute">#[cfg(not(target_os = <span class="string">"redox"</span>))] |
| </span><span class="kw">use </span>std::thread; |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_contains() { |
| <span class="kw">let </span><span class="kw-2">mut </span>mask = SigSet::empty(); |
| mask.add(SIGUSR1); |
| |
| <span class="macro">assert!</span>(mask.contains(SIGUSR1)); |
| <span class="macro">assert!</span>(!mask.contains(SIGUSR2)); |
| |
| <span class="kw">let </span>all = SigSet::all(); |
| <span class="macro">assert!</span>(all.contains(SIGUSR1)); |
| <span class="macro">assert!</span>(all.contains(SIGUSR2)); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_clear() { |
| <span class="kw">let </span><span class="kw-2">mut </span>set = SigSet::all(); |
| set.clear(); |
| <span class="kw">for </span>signal <span class="kw">in </span>Signal::iterator() { |
| <span class="macro">assert!</span>(!set.contains(signal)); |
| } |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_from_str_round_trips() { |
| <span class="kw">for </span>signal <span class="kw">in </span>Signal::iterator() { |
| <span class="macro">assert_eq!</span>(signal.as_ref().parse::<Signal>().unwrap(), signal); |
| <span class="macro">assert_eq!</span>(signal.to_string().parse::<Signal>().unwrap(), signal); |
| } |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_from_str_invalid_value() { |
| <span class="kw">let </span>errval = <span class="prelude-val">Err</span>(Errno::EINVAL); |
| <span class="macro">assert_eq!</span>(<span class="string">"NOSIGNAL"</span>.parse::<Signal>(), errval); |
| <span class="macro">assert_eq!</span>(<span class="string">"kill"</span>.parse::<Signal>(), errval); |
| <span class="macro">assert_eq!</span>(<span class="string">"9"</span>.parse::<Signal>(), errval); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_extend() { |
| <span class="kw">let </span><span class="kw-2">mut </span>one_signal = SigSet::empty(); |
| one_signal.add(SIGUSR1); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>two_signals = SigSet::empty(); |
| two_signals.add(SIGUSR2); |
| two_signals.extend(<span class="kw-2">&</span>one_signal); |
| |
| <span class="macro">assert!</span>(two_signals.contains(SIGUSR1)); |
| <span class="macro">assert!</span>(two_signals.contains(SIGUSR2)); |
| } |
| |
| <span class="attribute">#[test] |
| #[cfg(not(target_os = <span class="string">"redox"</span>))] |
| </span><span class="kw">fn </span>test_thread_signal_set_mask() { |
| thread::spawn(|| { |
| <span class="kw">let </span>prev_mask = SigSet::thread_get_mask() |
| .expect(<span class="string">"Failed to get existing signal mask!"</span>); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>test_mask = prev_mask; |
| test_mask.add(SIGUSR1); |
| |
| test_mask.thread_set_mask().expect(<span class="string">"assertion failed"</span>); |
| <span class="kw">let </span>new_mask = |
| SigSet::thread_get_mask().expect(<span class="string">"Failed to get new mask!"</span>); |
| |
| <span class="macro">assert!</span>(new_mask.contains(SIGUSR1)); |
| <span class="macro">assert!</span>(!new_mask.contains(SIGUSR2)); |
| |
| prev_mask |
| .thread_set_mask() |
| .expect(<span class="string">"Failed to revert signal mask!"</span>); |
| }) |
| .join() |
| .unwrap(); |
| } |
| |
| <span class="attribute">#[test] |
| #[cfg(not(target_os = <span class="string">"redox"</span>))] |
| </span><span class="kw">fn </span>test_thread_signal_block() { |
| thread::spawn(|| { |
| <span class="kw">let </span><span class="kw-2">mut </span>mask = SigSet::empty(); |
| mask.add(SIGUSR1); |
| |
| mask.thread_block().expect(<span class="string">"assertion failed"</span>); |
| |
| <span class="macro">assert!</span>(SigSet::thread_get_mask().unwrap().contains(SIGUSR1)); |
| }) |
| .join() |
| .unwrap(); |
| } |
| |
| <span class="attribute">#[test] |
| #[cfg(not(target_os = <span class="string">"redox"</span>))] |
| </span><span class="kw">fn </span>test_thread_signal_unblock() { |
| thread::spawn(|| { |
| <span class="kw">let </span><span class="kw-2">mut </span>mask = SigSet::empty(); |
| mask.add(SIGUSR1); |
| |
| mask.thread_unblock().expect(<span class="string">"assertion failed"</span>); |
| |
| <span class="macro">assert!</span>(!SigSet::thread_get_mask().unwrap().contains(SIGUSR1)); |
| }) |
| .join() |
| .unwrap(); |
| } |
| |
| <span class="attribute">#[test] |
| #[cfg(not(target_os = <span class="string">"redox"</span>))] |
| </span><span class="kw">fn </span>test_thread_signal_swap() { |
| thread::spawn(|| { |
| <span class="kw">let </span><span class="kw-2">mut </span>mask = SigSet::empty(); |
| mask.add(SIGUSR1); |
| mask.thread_block().unwrap(); |
| |
| <span class="macro">assert!</span>(SigSet::thread_get_mask().unwrap().contains(SIGUSR1)); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>mask2 = SigSet::empty(); |
| mask2.add(SIGUSR2); |
| |
| <span class="kw">let </span>oldmask = |
| mask2.thread_swap_mask(SigmaskHow::SIG_SETMASK).unwrap(); |
| |
| <span class="macro">assert!</span>(oldmask.contains(SIGUSR1)); |
| <span class="macro">assert!</span>(!oldmask.contains(SIGUSR2)); |
| |
| <span class="macro">assert!</span>(SigSet::thread_get_mask().unwrap().contains(SIGUSR2)); |
| }) |
| .join() |
| .unwrap(); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_from_and_into_iterator() { |
| <span class="kw">let </span>sigset = SigSet::from_iter(<span class="macro">vec!</span>[Signal::SIGUSR1, Signal::SIGUSR2]); |
| <span class="kw">let </span>signals = sigset.into_iter().collect::<Vec<Signal>>(); |
| <span class="macro">assert_eq!</span>(signals, [Signal::SIGUSR1, Signal::SIGUSR2]); |
| } |
| |
| <span class="attribute">#[test] |
| #[cfg(not(target_os = <span class="string">"redox"</span>))] |
| </span><span class="kw">fn </span>test_sigaction() { |
| thread::spawn(|| { |
| <span class="kw">extern </span><span class="string">"C" </span><span class="kw">fn </span>test_sigaction_handler(<span class="kw">_</span>: libc::c_int) {} |
| <span class="kw">extern </span><span class="string">"C" </span><span class="kw">fn </span>test_sigaction_action( |
| <span class="kw">_</span>: libc::c_int, |
| <span class="kw">_</span>: <span class="kw-2">*mut </span>libc::siginfo_t, |
| <span class="kw">_</span>: <span class="kw-2">*mut </span>libc::c_void, |
| ) { |
| } |
| |
| <span class="kw">let </span>handler_sig = SigHandler::Handler(test_sigaction_handler); |
| |
| <span class="kw">let </span>flags = |
| SaFlags::SA_ONSTACK | SaFlags::SA_RESTART | SaFlags::SA_SIGINFO; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>mask = SigSet::empty(); |
| mask.add(SIGUSR1); |
| |
| <span class="kw">let </span>action_sig = SigAction::new(handler_sig, flags, mask); |
| |
| <span class="macro">assert_eq!</span>( |
| action_sig.flags(), |
| SaFlags::SA_ONSTACK | SaFlags::SA_RESTART |
| ); |
| <span class="macro">assert_eq!</span>(action_sig.handler(), handler_sig); |
| |
| mask = action_sig.mask(); |
| <span class="macro">assert!</span>(mask.contains(SIGUSR1)); |
| <span class="macro">assert!</span>(!mask.contains(SIGUSR2)); |
| |
| <span class="kw">let </span>handler_act = SigHandler::SigAction(test_sigaction_action); |
| <span class="kw">let </span>action_act = SigAction::new(handler_act, flags, mask); |
| <span class="macro">assert_eq!</span>(action_act.handler(), handler_act); |
| |
| <span class="kw">let </span>action_dfl = SigAction::new(SigHandler::SigDfl, flags, mask); |
| <span class="macro">assert_eq!</span>(action_dfl.handler(), SigHandler::SigDfl); |
| |
| <span class="kw">let </span>action_ign = SigAction::new(SigHandler::SigIgn, flags, mask); |
| <span class="macro">assert_eq!</span>(action_ign.handler(), SigHandler::SigIgn); |
| }) |
| .join() |
| .unwrap(); |
| } |
| |
| <span class="attribute">#[test] |
| #[cfg(not(target_os = <span class="string">"redox"</span>))] |
| </span><span class="kw">fn </span>test_sigwait() { |
| thread::spawn(|| { |
| <span class="kw">let </span><span class="kw-2">mut </span>mask = SigSet::empty(); |
| mask.add(SIGUSR1); |
| mask.add(SIGUSR2); |
| mask.thread_block().unwrap(); |
| |
| raise(SIGUSR1).unwrap(); |
| <span class="macro">assert_eq!</span>(mask.wait().unwrap(), SIGUSR1); |
| }) |
| .join() |
| .unwrap(); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_from_sigset_t_unchecked() { |
| <span class="kw">let </span>src_set = SigSet::empty(); |
| <span class="kw">let </span>set = <span class="kw">unsafe </span>{ SigSet::from_sigset_t_unchecked(src_set.sigset) }; |
| |
| <span class="kw">for </span>signal <span class="kw">in </span>Signal::iterator() { |
| <span class="macro">assert!</span>(!set.contains(signal)); |
| } |
| |
| <span class="kw">let </span>src_set = SigSet::all(); |
| <span class="kw">let </span>set = <span class="kw">unsafe </span>{ SigSet::from_sigset_t_unchecked(src_set.sigset) }; |
| |
| <span class="kw">for </span>signal <span class="kw">in </span>Signal::iterator() { |
| <span class="macro">assert!</span>(set.contains(signal)); |
| } |
| } |
| } |
| </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> |
