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<!DOCTYPE html><htmllang="en"><head><metacharset="utf-8"><metaname="viewport"content="width=device-width, initial-scale=1.0"><metaname="generator"content="rustdoc"><metaname="description"content="API documentation for the Rust `signalfd` fn in crate `nix`."><metaname="keywords"content="rust, rustlang, rust-lang, signalfd"><title>nix::sys::signalfd::signalfd - Rust</title><linkrel="stylesheet"type="text/css"href="../../../normalize.css"><linkrel="stylesheet"type="text/css"href="../../../rustdoc.css"id="mainThemeStyle"><linkrel="stylesheet"type="text/css"href="../../../dark.css"><linkrel="stylesheet"type="text/css"href="../../../light.css"id="themeStyle"><scriptsrc="../../../storage.js"></script><noscript><linkrel="stylesheet"href="../../../noscript.css"></noscript><linkrel="shortcut icon"href="../../../favicon.ico"><styletype="text/css">#crate-search{background-image:url("../../../down-arrow.svg");}</style></head><bodyclass="rustdoc fn"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><navclass="sidebar"><divclass="sidebar-menu">☰</div><ahref='../../../nix/index.html'><divclass='logo-container'><imgsrc='../../../rust-logo.png'alt='logo'></div></a><divclass="sidebar-elems"><pclass='location'><ahref='../../index.html'>nix</a>::<wbr><ahref='../index.html'>sys</a>::<wbr><ahref='index.html'>signalfd</a></p><script>window.sidebarCurrent={name:'signalfd',ty:'fn',relpath:''};</script><scriptdefersrc="sidebar-items.js"></script></div></nav><divclass="theme-picker"><buttonid="theme-picker"aria-label="Pick another theme!"><imgsrc="../../../brush.svg"width="18"alt="Pick another theme!"></button><divid="theme-choices"></div></div><scriptsrc="../../../theme.js"></script><navclass="sub"><formclass="search-form js-only"><divclass="search-container"><div><selectid="crate-search"><optionvalue="All crates">All crates</option></select><inputclass="search-input"name="search"autocomplete="off"spellcheck="false"placeholder="Click or press ‘S’ to search, ‘?’ for more options…"type="search"></div><aid="settings-menu"href="../../../settings.html"><imgsrc="../../../wheel.svg"width="18"alt="Change settings"></a></div></form></nav><sectionid="main"class="content"><h1class='fqn'><spanclass='out-of-band'><spanid='render-detail'><aid="toggle-all-docs"href="javascript:void(0)"title="collapse all docs">[<spanclass='inner'>−</span>]</a></span><aclass='srclink'href='../../../src/nix/sys/signalfd.rs.html#50-54'title='goto source code'>[src]</a></span><spanclass='in-band'>Function <ahref='../../index.html'>nix</a>::<wbr><ahref='../index.html'>sys</a>::<wbr><ahref='index.html'>signalfd</a>::<wbr><aclass="fn"href=''>signalfd</a></span></h1><preclass='rust fn'>pub fn signalfd(fd: <aclass="type"href="https://doc.rust-lang.org/nightly/std/sys/unix/ext/io/type.RawFd.html"title="type std::sys::unix::ext::io::RawFd">RawFd</a>, mask: &<aclass="struct"href="../../../nix/sys/signal/struct.SigSet.html"title="struct nix::sys::signal::SigSet">SigSet</a>, flags: <aclass="struct"href="../../../nix/sys/signalfd/struct.SfdFlags.html"title="struct nix::sys::signalfd::SfdFlags">SfdFlags</a>) -><aclass="type"href="../../../nix/type.Result.html"title="type nix::Result">Result</a><<aclass="type"href="https://doc.rust-lang.org/nightly/std/sys/unix/ext/io/type.RawFd.html"title="type std::sys::unix::ext::io::RawFd">RawFd</a>></pre><divclass='docblock'><p>Creates a new file descriptor for reading signals.</p>
<p><strong>Important:</strong> please read the module level documentation about signal discarding before using
this function!</p>
<p>The <code>mask</code> parameter specifies the set of signals that can be accepted via this file descriptor.</p>
<p>A signal must be blocked on every thread in a process, otherwise it won't be visible from
signalfd (the default handler will be invoked instead).</p>
<p>See <ahref="http://man7.org/linux/man-pages/man2/signalfd.2.html">the signalfd man page for more information</a></p>
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