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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="API documentation for the Rust `fchownat` fn in crate `nix`."><meta name="keywords" content="rust, rustlang, rust-lang, fchownat"><title>nix::unistd::fchownat - Rust</title><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css"><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script src="../../storage.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="shortcut icon" href="../../favicon.ico"><style type="text/css">#crate-search{background-image:url("../../down-arrow.svg");}</style></head><body class="rustdoc fn"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../../nix/index.html'><div class='logo-container'><img src='../../rust-logo.png' alt='logo'></div></a><div class="sidebar-elems"><p class='location'><a href='../index.html'>nix</a>::<wbr><a href='index.html'>unistd</a></p><script>window.sidebarCurrent = {name: 'fchownat', ty: 'fn', relpath: ''};</script><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class='fqn'><span class='out-of-band'><span id='render-detail'><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class='inner'>−</span>]</a></span><a class='srclink' href='../../src/nix/unistd.rs.html#643-662' title='goto source code'>[src]</a></span><span class='in-band'>Function <a href='../index.html'>nix</a>::<wbr><a href='index.html'>unistd</a>::<wbr><a class="fn" href=''>fchownat</a></span></h1><pre class='rust fn'>pub fn fchownat<P: ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a> + <a class="trait" href="../../nix/trait.NixPath.html" title="trait nix::NixPath">NixPath</a>>(<br> dirfd: <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="type" href="https://doc.rust-lang.org/nightly/std/sys/unix/ext/io/type.RawFd.html" title="type std::sys::unix::ext::io::RawFd">RawFd</a>>, <br> path: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>P, <br> owner: <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="struct" href="../../nix/unistd/struct.Uid.html" title="struct nix::unistd::Uid">Uid</a>>, <br> group: <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="struct" href="../../nix/unistd/struct.Gid.html" title="struct nix::unistd::Gid">Gid</a>>, <br> flag: <a class="enum" href="../../nix/unistd/enum.FchownatFlags.html" title="enum ni
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<code>owner</code> (user) and <code>group</code>.</p>
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<p>The owner/group for the provided path name will not be modified if <code>None</code> is
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provided for that argument. Ownership change will be attempted for the path
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only if <code>Some</code> owner/group is provided.</p>
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<p>The file to be changed is determined relative to the directory associated
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with the file descriptor <code>dirfd</code> or the current working directory
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if <code>dirfd</code> is <code>None</code>.</p>
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<p>If <code>flag</code> is <code>FchownatFlags::NoFollowSymlink</code> and <code>path</code> names a symbolic link,
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then the mode of the symbolic link is changed.</p>
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<p><code>fchownat(None, path, mode, FchownatFlags::NoFollowSymlink)</code> is identical to
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a call <code>libc::lchown(path, mode)</code>. That's why <code>lchmod</code> is unimplemented in
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the <code>nix</code> crate.</p>
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<h1 id="references" class="section-header"><a href="#references">References</a></h1>
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<p><a href="http://pubs.opengroup.org/onlinepubs/9699919799/functions/fchownat.html">fchownat(2)</a>.</p>
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