<!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 `current_exe` fn in crate `std`."> <meta name="keywords" content="rust, rustlang, rust-lang, current_exe"> <title>std::env::current_exe - 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="../../main.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> <p class='location'><a href='../index.html'>std</a>::<wbr><a href='index.html'>env</a></p><script>window.sidebarCurrent = {name: 'current_exe', ty: 'fn', relpath: ''};</script><script defer src="sidebar-items.js"></script> </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"> </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'>env</a>::<wbr><a class="fn" href=''>current_exe</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/env.rs.html#636-638' title='goto source code'>[src]</a></span></h1> <pre class='rust fn'>pub fn current_exe() -> <a class="type" href="../../std/io/type.Result.html" title="type std::io::Result">Result</a><<a class="struct" href="../../std/path/struct.PathBuf.html" title="struct std::path::PathBuf">PathBuf</a>></pre><div class='docblock'><p>Returns the full filesystem path of the current running executable.</p> <h1 id="platform-specific-behavior" class="section-header"><a href="#platform-specific-behavior">Platform-specific behavior</a></h1> <p>If the executable was invoked through a symbolic link, some platforms will return the path of the symbolic link and other platforms will return the path of the symbolic link’s target.</p> <h1 id="errors" class="section-header"><a href="#errors">Errors</a></h1> <p>Acquiring the path of the current executable is a platform-specific operation that can fail for a good number of reasons. Some errors can include, but not be limited to, filesystem operations failing or general syscall failures.</p> <h1 id="security" class="section-header"><a href="#security">Security</a></h1> <p>The output of this function should not be used in anything that might have security implications. For example:</p> <pre class="rust rust-example-rendered"> <span class="kw">fn</span> <span class="ident">main</span>() { <span class="macro">println</span><span class="macro">!</span>(<span class="string">"{:?}"</span>, <span class="ident">std</span>::<span class="ident">env</span>::<span class="ident">current_exe</span>()); }<a class="test-arrow" target="_blank" href="https://play.rust-lang.org/?code=%23!%5Ballow(unused)%5D%0Afn%20main()%20%7B%0A%20%20%20%20println!(%22%7B%3A%3F%7D%22%2C%20std%3A%3Aenv%3A%3Acurrent_exe())%3B%0A%7D%0A">Run</a></pre> <p>On Linux systems, if this is compiled as <code>foo</code>:</p> <pre><code class="language-bash">$ rustc foo.rs $ ./foo Ok("/home/alex/foo") </code></pre> <p>And you make a hard link of the program:</p> <pre><code class="language-bash">$ ln foo bar </code></pre> <p>When you run it, you won’t get the path of the original executable, you’ll get the path of the hard link:</p> <pre><code class="language-bash">$ ./bar Ok("/home/alex/bar") </code></pre> <p>This sort of behavior has been known to <a href="https://securityvulns.com/Wdocument183.html">lead to privilege escalation</a> when used incorrectly.</p> <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">env</span>; <span class="kw">match</span> <span class="ident">env</span>::<span class="ident">current_exe</span>() { <span class="prelude-val">Ok</span>(<span class="ident">exe_path</span>) <span class="op">=></span> <span class="macro">println</span><span class="macro">!</span>(<span class="string">"Path of this executable is: {}"</span>, <span class="ident">exe_path</span>.<span class="ident">display</span>()), <span class="prelude-val">Err</span>(<span class="ident">e</span>) <span class="op">=></span> <span class="macro">println</span><span class="macro">!</span>(<span class="string">"failed to get current exe path: {}"</span>, <span class="ident">e</span>), };<a class="test-arrow" target="_blank" href="https://play.rust-lang.org/?code=%23!%5Ballow(unused)%5D%0Afn%20main()%20%7B%0Ause%20std%3A%3Aenv%3B%0A%0Amatch%20env%3A%3Acurrent_exe()%20%7B%0A%20%20%20%20Ok(exe_path)%20%3D%3E%20println!(%22Path%20of%20this%20executable%20is%3A%20%7B%7D%22%2C%0A%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20exe_path.display())%2C%0A%20%20%20%20Err(e)%20%3D%3E%20println!(%22failed%20to%20get%20current%20exe%20path%3A%20%7B%7D%22%2C%20e)%2C%0A%7D%3B%0A%7D">Run</a></pre> </div></section> <section id='search' class="content hidden"></section> <section class="footer"></section> <aside id="help" class="hidden"> <div> <h1 class="hidden">Help</h1> <div class="shortcuts"> <h2>Keyboard Shortcuts</h2> <dl> <dt><kbd>?</kbd></dt> <dd>Show this help dialog</dd> <dt><kbd>S</kbd></dt> <dd>Focus the search field</dd> <dt><kbd>↑</kbd></dt> <dd>Move up in search results</dd> <dt><kbd>↓</kbd></dt> <dd>Move down in search results</dd> <dt><kbd>↹</kbd></dt> <dd>Switch tab</dd> <dt><kbd>⏎</kbd></dt> <dd>Go to active search result</dd> <dt><kbd>+</kbd></dt> <dd>Expand all sections</dd> <dt><kbd>-</kbd></dt> <dd>Collapse all sections</dd> </dl> </div> <div class="infos"> <h2>Search Tricks</h2> <p> Prefix searches with a type followed by a colon (e.g. <code>fn:</code>) to restrict the search to a given type. </p> <p> Accepted types are: <code>fn</code>, <code>mod</code>, <code>struct</code>, <code>enum</code>, <code>trait</code>, <code>type</code>, <code>macro</code>, and <code>const</code>. </p> <p> Search functions by type signature (e.g. <code>vec -> usize</code> or <code>* -> vec</code>) </p> </div> </div> </aside> <script> window.rootPath = "../../"; window.currentCrate = "std"; </script> <script src="../../main.js"></script> <script defer src="../../search-index.js"></script> </body> </html>