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<!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="Asynchronous signal handling for Tokio."><title>tokio::signal - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-42caa33d.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="tokio" data-themes="" data-resource-suffix="" data-rustdoc-version="1.84.1 (e71f9a9a9 2025-01-27)" data-channel="1.84.1" data-search-js="search-92e6798f.js" data-settings-js="settings-0f613d39.js" ><script src="../../static.files/storage-59e33391.js"></script><script defer src="../sidebar-items.js"></script><script defer src="../../static.files/main-5f194d8c.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-893ab5e7.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-6580c154.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc mod"><!--[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" title="show sidebar"></button></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../tokio/index.html">tokio</a><span class="version">1.42.0</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">Module signal</a></h2><h3><a href="#">Sections</a></h3><ul class="block top-toc"><li><a href="#examples" title="Examples">Examples</a></li></ul><h3><a href="#modules">Module Items</a></h3><ul class="block"><li><a href="#modules" title="Modules">Modules</a></li><li><a href="#functions" title="Functions">Functions</a></li></ul></section><div id="rustdoc-modnav"><h2 class="in-crate"><a href="../index.html">In crate tokio</a></h2></div></div></nav><div class="sidebar-resizer"></div><main><div class="width-limiter"><rustdoc-search></rustdoc-search><section id="main-content" class="content"><div class="main-heading"><span class="rustdoc-breadcrumbs"><a href="../index.html">tokio</a></span><h1>Module <span>signal</span><button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../../src/tokio/signal/mod.rs.html#1-100">Source</a> </span></div><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Asynchronous signal handling for Tokio.</p>
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<p>Note that signal handling is in general a very tricky topic and should be
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used with great care. This crate attempts to implement ‘best practice’ for
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signal handling, but it should be evaluated for your own applications’ needs
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to see if it’s suitable.</p>
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<p>There are some fundamental limitations of this crate documented on the OS
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specific structures, as well.</p>
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<h2 id="examples"><a class="doc-anchor" href="#examples">§</a>Examples</h2>
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<p>Print on “ctrl-c” notification.</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>tokio::signal;
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<span class="attr">#[tokio::main]
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</span><span class="kw">async fn </span>main() -> <span class="prelude-ty">Result</span><(), Box<<span class="kw">dyn </span>std::error::Error>> {
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signal::ctrl_c().<span class="kw">await</span><span class="question-mark">?</span>;
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<span class="macro">println!</span>(<span class="string">"ctrl-c received!"</span>);
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<span class="prelude-val">Ok</span>(())
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}</code></pre></div>
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<p>Wait for <code>SIGHUP</code> on Unix</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>tokio::signal::unix::{signal, SignalKind};
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<span class="attr">#[tokio::main]
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</span><span class="kw">async fn </span>main() -> <span class="prelude-ty">Result</span><(), Box<<span class="kw">dyn </span>std::error::Error>> {
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<span class="comment">// An infinite stream of hangup signals.
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</span><span class="kw">let </span><span class="kw-2">mut </span>stream = signal(SignalKind::hangup())<span class="question-mark">?</span>;
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<span class="comment">// Print whenever a HUP signal is received
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</span><span class="kw">loop </span>{
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stream.recv().<span class="kw">await</span>;
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<span class="macro">println!</span>(<span class="string">"got signal HUP"</span>);
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}
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}</code></pre></div>
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</div></details><h2 id="modules" class="section-header">Modules<a href="#modules" class="anchor">§</a></h2><ul class="item-table"><li><div class="item-name"><a class="mod" href="unix/index.html" title="mod tokio::signal::unix">unix</a></div><div class="desc docblock-short">Unix-specific types for signal handling.</div></li></ul><h2 id="functions" class="section-header">Functions<a href="#functions" class="anchor">§</a></h2><ul class="item-table"><li><div class="item-name"><a class="fn" href="fn.ctrl_c.html" title="fn tokio::signal::ctrl_c">ctrl_c</a></div><div class="desc docblock-short">Completes when a “ctrl-c” notification is sent to the process.</div></li></ul></section></div></main></body></html> |