<!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 `hard_link` fn in crate `std`."><meta name="keywords" content="rust, rustlang, rust-lang, hard_link"><title>std::fs::hard_link - 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><link rel="shortcut icon" href="https://doc.rust-lang.org/favicon.ico"></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='../../std/index.html'><img src='https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png' alt='logo' width='100'></a><div class="sidebar-elems"><p class='location'><a href='../index.html'>std</a>::<wbr><a href='index.html'>fs</a></p><script>window.sidebarCurrent = {name: 'hard_link', 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"><input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><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='in-band'>Function <a href='../index.html'>std</a>::<wbr><a href='index.html'>fs</a>::<wbr><a class="fn" href=''>hard_link</a></span><span class='out-of-band'><span class='since' title='Stable since Rust version 1.0.0'>1.0.0</span><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/std/fs.rs.html#1637-1639' title='goto source code'>[src]</a></span></h1><pre class='rust fn'>pub fn hard_link<P: <a class="trait" href="../../std/convert/trait.AsRef.html" title="trait std::convert::AsRef">AsRef</a><<a class="struct" href="../../std/path/struct.Path.html" title="struct std::path::Path">Path</a>>, Q: <a class="trait" href="../../std/convert/trait.AsRef.html" title="trait std::convert::AsRef">AsRef</a><<a class="struct" href="../../std/path/struct.Path.html" title="struct std::path::Path">Path</a>>>(src: P, dst: Q) -> <a class="type" href="../../std/io/type.Result.html" title="type std::io::Result">Result</a><<a class="primitive" href="../primitive.unit.html">()</a>></pre><div class='docblock'><p>Creates a new hard link on the filesystem.</p>
<p>The <code>dst</code> path will be a link pointing to the <code>src</code> path. Note that systems
often require these two paths to both be located on the same filesystem.</p>
<h1 id="platform-specific-behavior" class="section-header"><a href="#platform-specific-behavior">Platform-specific behavior</a></h1>
<p>This function currently corresponds to the <code>link</code> function on Unix
and the <code>CreateHardLink</code> function on Windows.
Note that, this <a href="../io/index.html#platform-specific-behavior">may change in the future</a>.</p>
<h1 id="errors" class="section-header"><a href="#errors">Errors</a></h1>
<p>This function will return an error in the following situations, but is not
limited to just these cases:</p>
<ul>
<li>The <code>src</code> path is not a file or doesn't exist.</li>
</ul>
<h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fs</span>;
<span class="kw">fn</span> <span class="ident">main</span>() <span class="op">-></span> <span class="ident">std</span>::<span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> {
<span class="ident">fs</span>::<span class="ident">hard_link</span>(<span class="string">"a.txt"</span>, <span class="string">"b.txt"</span>)<span class="question-mark">?</span>; <span class="comment">// Hard link a.txt to b.txt</span>
<span class="prelude-val">Ok</span>(())
}<a class="test-arrow" target="_blank" href="https://play.rust-lang.org/?code=%23!%5Ballow(unused)%5D%0Ause%20std%3A%3Afs%3B%0A%0Afn%20main()%20-%3E%20std%3A%3Aio%3A%3AResult%3C()%3E%20%7B%0A%20%20%20%20fs%3A%3Ahard_link(%22a.txt%22%2C%20%22b.txt%22)%3F%3B%20%2F%2F%20Hard%20link%20a.txt%20to%20b.txt%0A%20%20%20%20Ok(())%0A%7D">Run</a></pre>
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