<!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="Source to the Rust file `libstd/sys/unix/os.rs`."> <meta name="keywords" content="rust, rustlang, rust-lang"> <title>os.rs.html -- source</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 source"> <!--[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> </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"><pre class="line-numbers"><span id="1"> 1</span> <span id="2"> 2</span> <span id="3"> 3</span> <span id="4"> 4</span> <span id="5"> 5</span> <span id="6"> 6</span> <span id="7"> 7</span> <span id="8"> 8</span> <span id="9"> 9</span> <span id="10"> 10</span> <span id="11"> 11</span> <span 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class="rust "> <span class="comment">// Copyright 2015 The Rust Project Developers. See the COPYRIGHT</span> <span class="comment">// file at the top-level directory of this distribution and at</span> <span class="comment">// http://rust-lang.org/COPYRIGHT.</span> <span class="comment">//</span> <span class="comment">// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or</span> <span class="comment">// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license</span> <span class="comment">// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your</span> <span class="comment">// option. This file may not be copied, modified, or distributed</span> <span class="comment">// except according to those terms.</span> <span class="doccomment">//! Implementation of `std::os` functionality for unix systems</span> <span class="attribute">#![<span class="ident">allow</span>(<span class="ident">unused_imports</span>)]</span> <span class="comment">// lots of cfg code here</span> <span class="kw">use</span> <span class="ident">os</span>::<span class="ident">unix</span>::<span class="ident">prelude</span>::<span class="kw-2">*</span>; <span class="kw">use</span> <span class="ident">error</span>::<span class="ident">Error</span> <span class="kw">as</span> <span class="ident">StdError</span>; <span class="kw">use</span> <span class="ident">ffi</span>::{<span class="ident">CString</span>, <span class="ident">CStr</span>, <span class="ident">OsString</span>, <span class="ident">OsStr</span>}; <span class="kw">use</span> <span class="ident">fmt</span>; <span class="kw">use</span> <span class="ident">io</span>; <span class="kw">use</span> <span class="ident">iter</span>; <span class="kw">use</span> <span class="ident">libc</span>::{<span class="self">self</span>, <span class="ident">c_int</span>, <span class="ident">c_char</span>, <span class="ident">c_void</span>}; <span class="kw">use</span> <span class="ident">marker</span>::<span class="ident">PhantomData</span>; <span class="kw">use</span> <span class="ident">mem</span>; <span class="kw">use</span> <span class="ident">memchr</span>; <span class="kw">use</span> <span class="ident">path</span>::{<span class="self">self</span>, <span class="ident">PathBuf</span>}; <span class="kw">use</span> <span class="ident">ptr</span>; <span class="kw">use</span> <span class="ident">slice</span>; <span class="kw">use</span> <span class="ident">str</span>; <span class="kw">use</span> <span class="ident">sys_common</span>::<span class="ident">mutex</span>::<span class="ident">Mutex</span>; <span class="kw">use</span> <span class="ident">sys</span>::<span class="ident">cvt</span>; <span class="kw">use</span> <span class="ident">sys</span>::<span class="ident">fd</span>; <span class="kw">use</span> <span class="ident">vec</span>; <span class="kw">const</span> <span class="ident">TMPBUF_SZ</span>: <span class="ident">usize</span> <span class="op">=</span> <span class="number">128</span>; <span class="kw">static</span> <span class="ident">ENV_LOCK</span>: <span class="ident">Mutex</span> <span class="op">=</span> <span class="ident">Mutex</span>::<span class="ident">new</span>(); <span class="kw">extern</span> { <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"dragonfly"</span>))]</span> <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">any</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"linux"</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"emscripten"</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"fuchsia"</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"l4re"</span>), <span class="ident">link_name</span> <span class="op">=</span> <span class="string">"__errno_location"</span>)]</span> <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">any</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"bitrig"</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"netbsd"</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"openbsd"</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"android"</span>, <span class="ident">target_env</span> <span class="op">=</span> <span class="string">"newlib"</span>), <span class="ident">link_name</span> <span class="op">=</span> <span class="string">"__errno"</span>)]</span> <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"solaris"</span>, <span class="ident">link_name</span> <span class="op">=</span> <span class="string">"___errno"</span>)]</span> <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">any</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"macos"</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"ios"</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"freebsd"</span>), <span class="ident">link_name</span> <span class="op">=</span> <span class="string">"__error"</span>)]</span> <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"haiku"</span>, <span class="ident">link_name</span> <span class="op">=</span> <span class="string">"_errnop"</span>)]</span> <span class="kw">fn</span> <span class="ident">errno_location</span>() <span class="op">-></span> <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">c_int</span>; } <span class="doccomment">/// Returns the platform-specific value of errno</span> <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"dragonfly"</span>))]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">errno</span>() <span class="op">-></span> <span class="ident">i32</span> { <span class="kw">unsafe</span> { (<span class="kw-2">*</span><span class="ident">errno_location</span>()) <span class="kw">as</span> <span class="ident">i32</span> } } <span class="doccomment">/// Sets the platform-specific value of errno</span> <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"solaris"</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"fuchsia"</span>))]</span> <span class="comment">// only needed for readdir so far</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_errno</span>(<span class="ident">e</span>: <span class="ident">i32</span>) { <span class="kw">unsafe</span> { <span class="kw-2">*</span><span class="ident">errno_location</span>() <span class="op">=</span> <span class="ident">e</span> <span class="kw">as</span> <span class="ident">c_int</span> } } <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"dragonfly"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">errno</span>() <span class="op">-></span> <span class="ident">i32</span> { <span class="kw">extern</span> { <span class="attribute">#[<span class="ident">thread_local</span>]</span> <span class="kw">static</span> <span class="ident">errno</span>: <span class="ident">c_int</span>; } <span class="kw">unsafe</span> { <span class="ident">errno</span> <span class="kw">as</span> <span class="ident">i32</span> } } <span class="doccomment">/// Gets a detailed string description for the given error number.</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">error_string</span>(<span class="ident">errno</span>: <span class="ident">i32</span>) <span class="op">-></span> <span class="ident">String</span> { <span class="kw">extern</span> { <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">any</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"linux"</span>, <span class="ident">target_env</span> <span class="op">=</span> <span class="string">"newlib"</span>), <span class="ident">link_name</span> <span class="op">=</span> <span class="string">"__xpg_strerror_r"</span>)]</span> <span class="kw">fn</span> <span class="ident">strerror_r</span>(<span class="ident">errnum</span>: <span class="ident">c_int</span>, <span class="ident">buf</span>: <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">c_char</span>, <span class="ident">buflen</span>: <span class="ident">libc</span>::<span class="ident">size_t</span>) <span class="op">-></span> <span class="ident">c_int</span>; } <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> [<span class="number">0</span> <span class="kw">as</span> <span class="ident">c_char</span>; <span class="ident">TMPBUF_SZ</span>]; <span class="kw">let</span> <span class="ident">p</span> <span class="op">=</span> <span class="ident">buf</span>.<span class="ident">as_mut_ptr</span>(); <span class="kw">unsafe</span> { <span class="kw">if</span> <span class="ident">strerror_r</span>(<span class="ident">errno</span> <span class="kw">as</span> <span class="ident">c_int</span>, <span class="ident">p</span>, <span class="ident">buf</span>.<span class="ident">len</span>()) <span class="op"><</span> <span class="number">0</span> { <span class="macro">panic</span><span class="macro">!</span>(<span class="string">"strerror_r failure"</span>); } <span class="kw">let</span> <span class="ident">p</span> <span class="op">=</span> <span class="ident">p</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> _; <span class="ident">str</span>::<span class="ident">from_utf8</span>(<span class="ident">CStr</span>::<span class="ident">from_ptr</span>(<span class="ident">p</span>).<span class="ident">to_bytes</span>()).<span class="ident">unwrap</span>().<span class="ident">to_owned</span>() } } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">getcwd</span>() <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">PathBuf</span><span class="op">></span> { <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">with_capacity</span>(<span class="number">512</span>); <span class="kw">loop</span> { <span class="kw">unsafe</span> { <span class="kw">let</span> <span class="ident">ptr</span> <span class="op">=</span> <span class="ident">buf</span>.<span class="ident">as_mut_ptr</span>() <span class="kw">as</span> <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">libc</span>::<span class="ident">c_char</span>; <span class="kw">if</span> <span class="op">!</span><span class="ident">libc</span>::<span class="ident">getcwd</span>(<span class="ident">ptr</span>, <span class="ident">buf</span>.<span class="ident">capacity</span>()).<span class="ident">is_null</span>() { <span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="ident">CStr</span>::<span class="ident">from_ptr</span>(<span class="ident">buf</span>.<span class="ident">as_ptr</span>() <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">libc</span>::<span class="ident">c_char</span>).<span class="ident">to_bytes</span>().<span class="ident">len</span>(); <span class="ident">buf</span>.<span class="ident">set_len</span>(<span class="ident">len</span>); <span class="ident">buf</span>.<span class="ident">shrink_to_fit</span>(); <span class="kw">return</span> <span class="prelude-val">Ok</span>(<span class="ident">PathBuf</span>::<span class="ident">from</span>(<span class="ident">OsString</span>::<span class="ident">from_vec</span>(<span class="ident">buf</span>))); } <span class="kw">else</span> { <span class="kw">let</span> <span class="ident">error</span> <span class="op">=</span> <span class="ident">io</span>::<span class="ident">Error</span>::<span class="ident">last_os_error</span>(); <span class="kw">if</span> <span class="ident">error</span>.<span class="ident">raw_os_error</span>() <span class="op">!=</span> <span class="prelude-val">Some</span>(<span class="ident">libc</span>::<span class="ident">ERANGE</span>) { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">error</span>); } } <span class="comment">// Trigger the internal buffer resizing logic of `Vec` by requiring</span> <span class="comment">// more space than the current capacity.</span> <span class="kw">let</span> <span class="ident">cap</span> <span class="op">=</span> <span class="ident">buf</span>.<span class="ident">capacity</span>(); <span class="ident">buf</span>.<span class="ident">set_len</span>(<span class="ident">cap</span>); <span class="ident">buf</span>.<span class="ident">reserve</span>(<span class="number">1</span>); } } } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">chdir</span>(<span class="ident">p</span>: <span class="kw-2">&</span><span class="ident">path</span>::<span class="ident">Path</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { <span class="kw">let</span> <span class="ident">p</span>: <span class="kw-2">&</span><span class="ident">OsStr</span> <span class="op">=</span> <span class="ident">p</span>.<span class="ident">as_ref</span>(); <span class="kw">let</span> <span class="ident">p</span> <span class="op">=</span> <span class="ident">CString</span>::<span class="ident">new</span>(<span class="ident">p</span>.<span class="ident">as_bytes</span>())<span class="question-mark">?</span>; <span class="kw">unsafe</span> { <span class="kw">match</span> <span class="ident">libc</span>::<span class="ident">chdir</span>(<span class="ident">p</span>.<span class="ident">as_ptr</span>()) <span class="op">==</span> (<span class="number">0</span> <span class="kw">as</span> <span class="ident">c_int</span>) { <span class="bool-val">true</span> <span class="op">=></span> <span class="prelude-val">Ok</span>(()), <span class="bool-val">false</span> <span class="op">=></span> <span class="prelude-val">Err</span>(<span class="ident">io</span>::<span class="ident">Error</span>::<span class="ident">last_os_error</span>()), } } } <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">SplitPaths</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> { <span class="ident">iter</span>: <span class="ident">iter</span>::<span class="ident">Map</span><span class="op"><</span><span class="ident">slice</span>::<span class="ident">Split</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">u8</span>, <span class="kw">fn</span>(<span class="kw-2">&</span><span class="ident">u8</span>) <span class="op">-></span> <span class="ident">bool</span><span class="op">></span>, <span class="kw">fn</span>(<span class="kw-2">&</span><span class="lifetime">'a</span> [<span class="ident">u8</span>]) <span class="op">-></span> <span class="ident">PathBuf</span><span class="op">></span>, } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">split_paths</span>(<span class="ident">unparsed</span>: <span class="kw-2">&</span><span class="ident">OsStr</span>) <span class="op">-></span> <span class="ident">SplitPaths</span> { <span class="kw">fn</span> <span class="ident">bytes_to_path</span>(<span class="ident">b</span>: <span class="kw-2">&</span>[<span class="ident">u8</span>]) <span class="op">-></span> <span class="ident">PathBuf</span> { <span class="ident">PathBuf</span>::<span class="ident">from</span>(<span class="op"><</span><span class="ident">OsStr</span> <span class="kw">as</span> <span class="ident">OsStrExt</span><span class="op">></span>::<span class="ident">from_bytes</span>(<span class="ident">b</span>)) } <span class="kw">fn</span> <span class="ident">is_colon</span>(<span class="ident">b</span>: <span class="kw-2">&</span><span class="ident">u8</span>) <span class="op">-></span> <span class="ident">bool</span> { <span class="kw-2">*</span><span class="ident">b</span> <span class="op">==</span> <span class="string">b':'</span> } <span class="kw">let</span> <span class="ident">unparsed</span> <span class="op">=</span> <span class="ident">unparsed</span>.<span class="ident">as_bytes</span>(); <span class="ident">SplitPaths</span> { <span class="ident">iter</span>: <span class="ident">unparsed</span>.<span class="ident">split</span>(<span class="ident">is_colon</span> <span class="kw">as</span> <span class="kw">fn</span>(<span class="kw-2">&</span><span class="ident">u8</span>) <span class="op">-></span> <span class="ident">bool</span>) .<span class="ident">map</span>(<span class="ident">bytes_to_path</span> <span class="kw">as</span> <span class="kw">fn</span>(<span class="kw-2">&</span>[<span class="ident">u8</span>]) <span class="op">-></span> <span class="ident">PathBuf</span>) } } <span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">SplitPaths</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> { <span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="ident">PathBuf</span>; <span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">PathBuf</span><span class="op">></span> { <span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">next</span>() } <span class="kw">fn</span> <span class="ident">size_hint</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> (<span class="ident">usize</span>, <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>) { <span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">size_hint</span>() } } <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>)]</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">JoinPathsError</span>; <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">join_paths</span><span class="op"><</span><span class="ident">I</span>, <span class="ident">T</span><span class="op">></span>(<span class="ident">paths</span>: <span class="ident">I</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">OsString</span>, <span class="ident">JoinPathsError</span><span class="op">></span> <span class="kw">where</span> <span class="ident">I</span>: <span class="ident">Iterator</span><span class="op"><</span><span class="ident">Item</span><span class="op">=</span><span class="ident">T</span><span class="op">></span>, <span class="ident">T</span>: <span class="ident">AsRef</span><span class="op"><</span><span class="ident">OsStr</span><span class="op">></span> { <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">joined</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">new</span>(); <span class="kw">let</span> <span class="ident">sep</span> <span class="op">=</span> <span class="string">b':'</span>; <span class="kw">for</span> (<span class="ident">i</span>, <span class="ident">path</span>) <span class="kw">in</span> <span class="ident">paths</span>.<span class="ident">enumerate</span>() { <span class="kw">let</span> <span class="ident">path</span> <span class="op">=</span> <span class="ident">path</span>.<span class="ident">as_ref</span>().<span class="ident">as_bytes</span>(); <span class="kw">if</span> <span class="ident">i</span> <span class="op">></span> <span class="number">0</span> { <span class="ident">joined</span>.<span class="ident">push</span>(<span class="ident">sep</span>) } <span class="kw">if</span> <span class="ident">path</span>.<span class="ident">contains</span>(<span class="kw-2">&</span><span class="ident">sep</span>) { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">JoinPathsError</span>) } <span class="ident">joined</span>.<span class="ident">extend_from_slice</span>(<span class="ident">path</span>); } <span class="prelude-val">Ok</span>(<span class="ident">OsStringExt</span>::<span class="ident">from_vec</span>(<span class="ident">joined</span>)) } <span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Display</span> <span class="kw">for</span> <span class="ident">JoinPathsError</span> { <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> { <span class="string">"path segment contains separator `:`"</span>.<span class="ident">fmt</span>(<span class="ident">f</span>) } } <span class="kw">impl</span> <span class="ident">StdError</span> <span class="kw">for</span> <span class="ident">JoinPathsError</span> { <span class="kw">fn</span> <span class="ident">description</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="ident">str</span> { <span class="string">"failed to join paths"</span> } } <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"freebsd"</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"dragonfly"</span>))]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">current_exe</span>() <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">PathBuf</span><span class="op">></span> { <span class="kw">unsafe</span> { <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">mib</span> <span class="op">=</span> [<span class="ident">libc</span>::<span class="ident">CTL_KERN</span> <span class="kw">as</span> <span class="ident">c_int</span>, <span class="ident">libc</span>::<span class="ident">KERN_PROC</span> <span class="kw">as</span> <span class="ident">c_int</span>, <span class="ident">libc</span>::<span class="ident">KERN_PROC_PATHNAME</span> <span class="kw">as</span> <span class="ident">c_int</span>, <span class="op">-</span><span class="number">1</span> <span class="kw">as</span> <span class="ident">c_int</span>]; <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">sz</span> <span class="op">=</span> <span class="number">0</span>; <span class="ident">cvt</span>(<span class="ident">libc</span>::<span class="ident">sysctl</span>(<span class="ident">mib</span>.<span class="ident">as_mut_ptr</span>(), <span class="ident">mib</span>.<span class="ident">len</span>() <span class="kw">as</span> ::<span class="ident">libc</span>::<span class="ident">c_uint</span>, <span class="ident">ptr</span>::<span class="ident">null_mut</span>(), <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">sz</span>, <span class="ident">ptr</span>::<span class="ident">null_mut</span>(), <span class="number">0</span>))<span class="question-mark">?</span>; <span class="kw">if</span> <span class="ident">sz</span> <span class="op">==</span> <span class="number">0</span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">io</span>::<span class="ident">Error</span>::<span class="ident">last_os_error</span>()) } <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">v</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">u8</span><span class="op">></span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">with_capacity</span>(<span class="ident">sz</span>); <span class="ident">cvt</span>(<span class="ident">libc</span>::<span class="ident">sysctl</span>(<span class="ident">mib</span>.<span class="ident">as_mut_ptr</span>(), <span class="ident">mib</span>.<span class="ident">len</span>() <span class="kw">as</span> ::<span class="ident">libc</span>::<span class="ident">c_uint</span>, <span class="ident">v</span>.<span class="ident">as_mut_ptr</span>() <span class="kw">as</span> <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">libc</span>::<span class="ident">c_void</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">sz</span>, <span class="ident">ptr</span>::<span class="ident">null_mut</span>(), <span class="number">0</span>))<span class="question-mark">?</span>; <span class="kw">if</span> <span class="ident">sz</span> <span class="op">==</span> <span class="number">0</span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">io</span>::<span class="ident">Error</span>::<span class="ident">last_os_error</span>()); } <span class="ident">v</span>.<span class="ident">set_len</span>(<span class="ident">sz</span> <span class="op">-</span> <span class="number">1</span>); <span class="comment">// chop off trailing NUL</span> <span class="prelude-val">Ok</span>(<span class="ident">PathBuf</span>::<span class="ident">from</span>(<span class="ident">OsString</span>::<span class="ident">from_vec</span>(<span class="ident">v</span>))) } } <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"netbsd"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">current_exe</span>() <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">PathBuf</span><span class="op">></span> { <span class="kw">fn</span> <span class="ident">sysctl</span>() <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">PathBuf</span><span class="op">></span> { <span class="kw">unsafe</span> { <span class="kw">let</span> <span class="ident">mib</span> <span class="op">=</span> [<span class="ident">libc</span>::<span class="ident">CTL_KERN</span>, <span class="ident">libc</span>::<span class="ident">KERN_PROC_ARGS</span>, <span class="op">-</span><span class="number">1</span>, <span class="ident">libc</span>::<span class="ident">KERN_PROC_PATHNAME</span>]; <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">path_len</span>: <span class="ident">usize</span> <span class="op">=</span> <span class="number">0</span>; <span class="ident">cvt</span>(<span class="ident">libc</span>::<span class="ident">sysctl</span>(<span class="ident">mib</span>.<span class="ident">as_ptr</span>(), <span class="ident">mib</span>.<span class="ident">len</span>() <span class="kw">as</span> ::<span class="ident">libc</span>::<span class="ident">c_uint</span>, <span class="ident">ptr</span>::<span class="ident">null_mut</span>(), <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">path_len</span>, <span class="ident">ptr</span>::<span class="ident">null</span>(), <span class="number">0</span>))<span class="question-mark">?</span>; <span class="kw">if</span> <span class="ident">path_len</span> <span class="op"><=</span> <span class="number">1</span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">io</span>::<span class="ident">Error</span>::<span class="ident">new</span>(<span class="ident">io</span>::<span class="ident">ErrorKind</span>::<span class="ident">Other</span>, <span class="string">"KERN_PROC_PATHNAME sysctl returned zero-length string"</span>)) } <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">path</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">u8</span><span class="op">></span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">with_capacity</span>(<span class="ident">path_len</span>); <span class="ident">cvt</span>(<span class="ident">libc</span>::<span class="ident">sysctl</span>(<span class="ident">mib</span>.<span class="ident">as_ptr</span>(), <span class="ident">mib</span>.<span class="ident">len</span>() <span class="kw">as</span> ::<span class="ident">libc</span>::<span class="ident">c_uint</span>, <span class="ident">path</span>.<span class="ident">as_ptr</span>() <span class="kw">as</span> <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">libc</span>::<span class="ident">c_void</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">path_len</span>, <span class="ident">ptr</span>::<span class="ident">null</span>(), <span class="number">0</span>))<span class="question-mark">?</span>; <span class="ident">path</span>.<span class="ident">set_len</span>(<span class="ident">path_len</span> <span class="op">-</span> <span class="number">1</span>); <span class="comment">// chop off NUL</span> <span class="prelude-val">Ok</span>(<span class="ident">PathBuf</span>::<span class="ident">from</span>(<span class="ident">OsString</span>::<span class="ident">from_vec</span>(<span class="ident">path</span>))) } } <span class="kw">fn</span> <span class="ident">procfs</span>() <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">PathBuf</span><span class="op">></span> { <span class="kw">let</span> <span class="ident">curproc_exe</span> <span class="op">=</span> <span class="ident">path</span>::<span class="ident">Path</span>::<span class="ident">new</span>(<span class="string">"/proc/curproc/exe"</span>); <span class="kw">if</span> <span class="ident">curproc_exe</span>.<span class="ident">is_file</span>() { <span class="kw">return</span> ::<span class="ident">fs</span>::<span class="ident">read_link</span>(<span class="ident">curproc_exe</span>); } <span class="prelude-val">Err</span>(<span class="ident">io</span>::<span class="ident">Error</span>::<span class="ident">new</span>(<span class="ident">io</span>::<span class="ident">ErrorKind</span>::<span class="ident">Other</span>, <span class="string">"/proc/curproc/exe doesn't point to regular file."</span>)) } <span class="ident">sysctl</span>().<span class="ident">or_else</span>(<span class="op">|</span>_<span class="op">|</span> <span class="ident">procfs</span>()) } <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"bitrig"</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"openbsd"</span>))]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">current_exe</span>() <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">PathBuf</span><span class="op">></span> { <span class="kw">unsafe</span> { <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">mib</span> <span class="op">=</span> [<span class="ident">libc</span>::<span class="ident">CTL_KERN</span>, <span class="ident">libc</span>::<span class="ident">KERN_PROC_ARGS</span>, <span class="ident">libc</span>::<span class="ident">getpid</span>(), <span class="ident">libc</span>::<span class="ident">KERN_PROC_ARGV</span>]; <span class="kw">let</span> <span class="ident">mib</span> <span class="op">=</span> <span class="ident">mib</span>.<span class="ident">as_mut_ptr</span>(); <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">argv_len</span> <span class="op">=</span> <span class="number">0</span>; <span class="ident">cvt</span>(<span class="ident">libc</span>::<span class="ident">sysctl</span>(<span class="ident">mib</span>, <span class="number">4</span>, <span class="ident">ptr</span>::<span class="ident">null_mut</span>(), <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">argv_len</span>, <span class="ident">ptr</span>::<span class="ident">null_mut</span>(), <span class="number">0</span>))<span class="question-mark">?</span>; <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">argv</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="op"><</span><span class="kw-2">*</span><span class="kw">const</span> <span class="ident">libc</span>::<span class="ident">c_char</span><span class="op">></span>::<span class="ident">with_capacity</span>(<span class="ident">argv_len</span> <span class="kw">as</span> <span class="ident">usize</span>); <span class="ident">cvt</span>(<span class="ident">libc</span>::<span class="ident">sysctl</span>(<span class="ident">mib</span>, <span class="number">4</span>, <span class="ident">argv</span>.<span class="ident">as_mut_ptr</span>() <span class="kw">as</span> <span class="kw-2">*</span><span class="kw-2">mut</span> _, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">argv_len</span>, <span class="ident">ptr</span>::<span class="ident">null_mut</span>(), <span class="number">0</span>))<span class="question-mark">?</span>; <span class="ident">argv</span>.<span class="ident">set_len</span>(<span class="ident">argv_len</span> <span class="kw">as</span> <span class="ident">usize</span>); <span class="kw">if</span> <span class="ident">argv</span>[<span class="number">0</span>].<span class="ident">is_null</span>() { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">io</span>::<span class="ident">Error</span>::<span class="ident">new</span>(<span class="ident">io</span>::<span class="ident">ErrorKind</span>::<span class="ident">Other</span>, <span class="string">"no current exe available"</span>)) } <span class="kw">let</span> <span class="ident">argv0</span> <span class="op">=</span> <span class="ident">CStr</span>::<span class="ident">from_ptr</span>(<span class="ident">argv</span>[<span class="number">0</span>]).<span class="ident">to_bytes</span>(); <span class="kw">if</span> <span class="ident">argv0</span>[<span class="number">0</span>] <span class="op">==</span> <span class="string">b'.'</span> <span class="op">||</span> <span class="ident">argv0</span>.<span class="ident">iter</span>().<span class="ident">any</span>(<span class="op">|</span><span class="ident">b</span><span class="op">|</span> <span class="kw-2">*</span><span class="ident">b</span> <span class="op">==</span> <span class="string">b'/'</span>) { ::<span class="ident">fs</span>::<span class="ident">canonicalize</span>(<span class="ident">OsStr</span>::<span class="ident">from_bytes</span>(<span class="ident">argv0</span>)) } <span class="kw">else</span> { <span class="prelude-val">Ok</span>(<span class="ident">PathBuf</span>::<span class="ident">from</span>(<span class="ident">OsStr</span>::<span class="ident">from_bytes</span>(<span class="ident">argv0</span>))) } } } <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"linux"</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"android"</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"emscripten"</span>))]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">current_exe</span>() <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">PathBuf</span><span class="op">></span> { <span class="kw">let</span> <span class="ident">selfexe</span> <span class="op">=</span> <span class="ident">PathBuf</span>::<span class="ident">from</span>(<span class="string">"/proc/self/exe"</span>); <span class="kw">if</span> <span class="ident">selfexe</span>.<span class="ident">exists</span>() { ::<span class="ident">fs</span>::<span class="ident">read_link</span>(<span class="ident">selfexe</span>) } <span class="kw">else</span> { <span class="prelude-val">Err</span>(<span class="ident">io</span>::<span class="ident">Error</span>::<span class="ident">new</span>(<span class="ident">io</span>::<span class="ident">ErrorKind</span>::<span class="ident">Other</span>, <span class="string">"no /proc/self/exe available. Is /proc mounted?"</span>)) } } <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"macos"</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"ios"</span>))]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">current_exe</span>() <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">PathBuf</span><span class="op">></span> { <span class="kw">extern</span> { <span class="kw">fn</span> <span class="ident">_NSGetExecutablePath</span>(<span class="ident">buf</span>: <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">libc</span>::<span class="ident">c_char</span>, <span class="ident">bufsize</span>: <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">u32</span>) <span class="op">-></span> <span class="ident">libc</span>::<span class="ident">c_int</span>; } <span class="kw">unsafe</span> { <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">sz</span>: <span class="ident">u32</span> <span class="op">=</span> <span class="number">0</span>; <span class="ident">_NSGetExecutablePath</span>(<span class="ident">ptr</span>::<span class="ident">null_mut</span>(), <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">sz</span>); <span class="kw">if</span> <span class="ident">sz</span> <span class="op">==</span> <span class="number">0</span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">io</span>::<span class="ident">Error</span>::<span class="ident">last_os_error</span>()); } <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">v</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">u8</span><span class="op">></span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">with_capacity</span>(<span class="ident">sz</span> <span class="kw">as</span> <span class="ident">usize</span>); <span class="kw">let</span> <span class="ident">err</span> <span class="op">=</span> <span class="ident">_NSGetExecutablePath</span>(<span class="ident">v</span>.<span class="ident">as_mut_ptr</span>() <span class="kw">as</span> <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">i8</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">sz</span>); <span class="kw">if</span> <span class="ident">err</span> <span class="op">!=</span> <span class="number">0</span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">io</span>::<span class="ident">Error</span>::<span class="ident">last_os_error</span>()); } <span class="ident">v</span>.<span class="ident">set_len</span>(<span class="ident">sz</span> <span class="kw">as</span> <span class="ident">usize</span> <span class="op">-</span> <span class="number">1</span>); <span class="comment">// chop off trailing NUL</span> <span class="prelude-val">Ok</span>(<span class="ident">PathBuf</span>::<span class="ident">from</span>(<span class="ident">OsString</span>::<span class="ident">from_vec</span>(<span class="ident">v</span>))) } } <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"solaris"</span>))]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">current_exe</span>() <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">PathBuf</span><span class="op">></span> { <span class="kw">extern</span> { <span class="kw">fn</span> <span class="ident">getexecname</span>() <span class="op">-></span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">c_char</span>; } <span class="kw">unsafe</span> { <span class="kw">let</span> <span class="ident">path</span> <span class="op">=</span> <span class="ident">getexecname</span>(); <span class="kw">if</span> <span class="ident">path</span>.<span class="ident">is_null</span>() { <span class="prelude-val">Err</span>(<span class="ident">io</span>::<span class="ident">Error</span>::<span class="ident">last_os_error</span>()) } <span class="kw">else</span> { <span class="kw">let</span> <span class="ident">filename</span> <span class="op">=</span> <span class="ident">CStr</span>::<span class="ident">from_ptr</span>(<span class="ident">path</span>).<span class="ident">to_bytes</span>(); <span class="kw">let</span> <span class="ident">path</span> <span class="op">=</span> <span class="ident">PathBuf</span>::<span class="ident">from</span>(<span class="op"><</span><span class="ident">OsStr</span> <span class="kw">as</span> <span class="ident">OsStrExt</span><span class="op">></span>::<span class="ident">from_bytes</span>(<span class="ident">filename</span>)); <span class="comment">// Prepend a current working directory to the path if</span> <span class="comment">// it doesn't contain an absolute pathname.</span> <span class="kw">if</span> <span class="ident">filename</span>[<span class="number">0</span>] <span class="op">==</span> <span class="string">b'/'</span> { <span class="prelude-val">Ok</span>(<span class="ident">path</span>) } <span class="kw">else</span> { <span class="ident">getcwd</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">cwd</span><span class="op">|</span> <span class="ident">cwd</span>.<span class="ident">join</span>(<span class="ident">path</span>)) } } } } <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"haiku"</span>)]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">current_exe</span>() <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">PathBuf</span><span class="op">></span> { <span class="comment">// Use Haiku's image info functions</span> <span class="attribute">#[<span class="ident">repr</span>(<span class="ident">C</span>)]</span> <span class="kw">struct</span> <span class="ident">image_info</span> { <span class="ident">id</span>: <span class="ident">i32</span>, <span class="ident">type_</span>: <span class="ident">i32</span>, <span class="ident">sequence</span>: <span class="ident">i32</span>, <span class="ident">init_order</span>: <span class="ident">i32</span>, <span class="ident">init_routine</span>: <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">libc</span>::<span class="ident">c_void</span>, <span class="comment">// function pointer</span> <span class="ident">term_routine</span>: <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">libc</span>::<span class="ident">c_void</span>, <span class="comment">// function pointer</span> <span class="ident">device</span>: <span class="ident">libc</span>::<span class="ident">dev_t</span>, <span class="ident">node</span>: <span class="ident">libc</span>::<span class="ident">ino_t</span>, <span class="ident">name</span>: [<span class="ident">libc</span>::<span class="ident">c_char</span>; <span class="number">1024</span>], <span class="comment">// MAXPATHLEN</span> <span class="ident">text</span>: <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">libc</span>::<span class="ident">c_void</span>, <span class="ident">data</span>: <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">libc</span>::<span class="ident">c_void</span>, <span class="ident">text_size</span>: <span class="ident">i32</span>, <span class="ident">data_size</span>: <span class="ident">i32</span>, <span class="ident">api_version</span>: <span class="ident">i32</span>, <span class="ident">abi</span>: <span class="ident">i32</span>, } <span class="kw">unsafe</span> { <span class="kw">extern</span> { <span class="kw">fn</span> <span class="ident">_get_next_image_info</span>(<span class="ident">team_id</span>: <span class="ident">i32</span>, <span class="ident">cookie</span>: <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">i32</span>, <span class="ident">info</span>: <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">image_info</span>, <span class="ident">size</span>: <span class="ident">i32</span>) <span class="op">-></span> <span class="ident">i32</span>; } <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">info</span>: <span class="ident">image_info</span> <span class="op">=</span> <span class="ident">mem</span>::<span class="ident">zeroed</span>(); <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">cookie</span>: <span class="ident">i32</span> <span class="op">=</span> <span class="number">0</span>; <span class="comment">// the executable can be found at team id 0</span> <span class="kw">let</span> <span class="ident">result</span> <span class="op">=</span> <span class="ident">_get_next_image_info</span>(<span class="number">0</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">cookie</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">info</span>, <span class="ident">mem</span>::<span class="ident">size_of</span>::<span class="op"><</span><span class="ident">image_info</span><span class="op">></span>() <span class="kw">as</span> <span class="ident">i32</span>); <span class="kw">if</span> <span class="ident">result</span> <span class="op">!=</span> <span class="number">0</span> { <span class="kw">use</span> <span class="ident">io</span>::<span class="ident">ErrorKind</span>; <span class="prelude-val">Err</span>(<span class="ident">io</span>::<span class="ident">Error</span>::<span class="ident">new</span>(<span class="ident">ErrorKind</span>::<span class="ident">Other</span>, <span class="string">"Error getting executable path"</span>)) } <span class="kw">else</span> { <span class="kw">let</span> <span class="ident">name</span> <span class="op">=</span> <span class="ident">CStr</span>::<span class="ident">from_ptr</span>(<span class="ident">info</span>.<span class="ident">name</span>.<span class="ident">as_ptr</span>()).<span class="ident">to_bytes</span>(); <span class="prelude-val">Ok</span>(<span class="ident">PathBuf</span>::<span class="ident">from</span>(<span class="ident">OsStr</span>::<span class="ident">from_bytes</span>(<span class="ident">name</span>))) } } } <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"fuchsia"</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"l4re"</span>))]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">current_exe</span>() <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">PathBuf</span><span class="op">></span> { <span class="kw">use</span> <span class="ident">io</span>::<span class="ident">ErrorKind</span>; <span class="prelude-val">Err</span>(<span class="ident">io</span>::<span class="ident">Error</span>::<span class="ident">new</span>(<span class="ident">ErrorKind</span>::<span class="ident">Other</span>, <span class="string">"Not yet implemented!"</span>)) } <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Env</span> { <span class="ident">iter</span>: <span class="ident">vec</span>::<span class="ident">IntoIter</span><span class="op"><</span>(<span class="ident">OsString</span>, <span class="ident">OsString</span>)<span class="op">></span>, <span class="ident">_dont_send_or_sync_me</span>: <span class="ident">PhantomData</span><span class="op"><</span><span class="kw-2">*</span><span class="kw-2">mut</span> ()<span class="op">></span>, } <span class="kw">impl</span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">Env</span> { <span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> (<span class="ident">OsString</span>, <span class="ident">OsString</span>); <span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span>(<span class="ident">OsString</span>, <span class="ident">OsString</span>)<span class="op">></span> { <span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">next</span>() } <span class="kw">fn</span> <span class="ident">size_hint</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> (<span class="ident">usize</span>, <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>) { <span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">size_hint</span>() } } <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"macos"</span>)]</span> <span class="kw">pub</span> <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">environ</span>() <span class="op">-></span> <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">c_char</span> { <span class="kw">extern</span> { <span class="kw">fn</span> <span class="ident">_NSGetEnviron</span>() <span class="op">-></span> <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">c_char</span>; } <span class="ident">_NSGetEnviron</span>() } <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"macos"</span>))]</span> <span class="kw">pub</span> <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">environ</span>() <span class="op">-></span> <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">c_char</span> { <span class="kw">extern</span> { <span class="kw">static</span> <span class="kw-2">mut</span> <span class="ident">environ</span>: <span class="kw-2">*</span><span class="kw">const</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">c_char</span>; } <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">environ</span> } <span class="doccomment">/// Returns a vector of (variable, value) byte-vector pairs for all the</span> <span class="doccomment">/// environment variables of the current process.</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">env</span>() <span class="op">-></span> <span class="ident">Env</span> { <span class="kw">unsafe</span> { <span class="ident">ENV_LOCK</span>.<span class="ident">lock</span>(); <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">environ</span> <span class="op">=</span> <span class="kw-2">*</span><span class="ident">environ</span>(); <span class="kw">if</span> <span class="ident">environ</span> <span class="op">==</span> <span class="ident">ptr</span>::<span class="ident">null</span>() { <span class="ident">ENV_LOCK</span>.<span class="ident">unlock</span>(); <span class="macro">panic</span><span class="macro">!</span>(<span class="string">"os::env() failure getting env string from OS: {}"</span>, <span class="ident">io</span>::<span class="ident">Error</span>::<span class="ident">last_os_error</span>()); } <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">result</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">new</span>(); <span class="kw">while</span> <span class="kw-2">*</span><span class="ident">environ</span> <span class="op">!=</span> <span class="ident">ptr</span>::<span class="ident">null</span>() { <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">key_value</span>) <span class="op">=</span> <span class="ident">parse</span>(<span class="ident">CStr</span>::<span class="ident">from_ptr</span>(<span class="kw-2">*</span><span class="ident">environ</span>).<span class="ident">to_bytes</span>()) { <span class="ident">result</span>.<span class="ident">push</span>(<span class="ident">key_value</span>); } <span class="ident">environ</span> <span class="op">=</span> <span class="ident">environ</span>.<span class="ident">offset</span>(<span class="number">1</span>); } <span class="kw">let</span> <span class="ident">ret</span> <span class="op">=</span> <span class="ident">Env</span> { <span class="ident">iter</span>: <span class="ident">result</span>.<span class="ident">into_iter</span>(), <span class="ident">_dont_send_or_sync_me</span>: <span class="ident">PhantomData</span>, }; <span class="ident">ENV_LOCK</span>.<span class="ident">unlock</span>(); <span class="kw">return</span> <span class="ident">ret</span> } <span class="kw">fn</span> <span class="ident">parse</span>(<span class="ident">input</span>: <span class="kw-2">&</span>[<span class="ident">u8</span>]) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span>(<span class="ident">OsString</span>, <span class="ident">OsString</span>)<span class="op">></span> { <span class="comment">// Strategy (copied from glibc): Variable name and value are separated</span> <span class="comment">// by an ASCII equals sign '='. Since a variable name must not be</span> <span class="comment">// empty, allow variable names starting with an equals sign. Skip all</span> <span class="comment">// malformed lines.</span> <span class="kw">if</span> <span class="ident">input</span>.<span class="ident">is_empty</span>() { <span class="kw">return</span> <span class="prelude-val">None</span>; } <span class="kw">let</span> <span class="ident">pos</span> <span class="op">=</span> <span class="ident">memchr</span>::<span class="ident">memchr</span>(<span class="string">b'='</span>, <span class="kw-2">&</span><span class="ident">input</span>[<span class="number">1</span>..]).<span class="ident">map</span>(<span class="op">|</span><span class="ident">p</span><span class="op">|</span> <span class="ident">p</span> <span class="op">+</span> <span class="number">1</span>); <span class="ident">pos</span>.<span class="ident">map</span>(<span class="op">|</span><span class="ident">p</span><span class="op">|</span> ( <span class="ident">OsStringExt</span>::<span class="ident">from_vec</span>(<span class="ident">input</span>[..<span class="ident">p</span>].<span class="ident">to_vec</span>()), <span class="ident">OsStringExt</span>::<span class="ident">from_vec</span>(<span class="ident">input</span>[<span class="ident">p</span><span class="op">+</span><span class="number">1</span>..].<span class="ident">to_vec</span>()), )) } } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">getenv</span>(<span class="ident">k</span>: <span class="kw-2">&</span><span class="ident">OsStr</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">OsString</span><span class="op">>></span> { <span class="comment">// environment variables with a nul byte can't be set, so their value is</span> <span class="comment">// always None as well</span> <span class="kw">let</span> <span class="ident">k</span> <span class="op">=</span> <span class="ident">CString</span>::<span class="ident">new</span>(<span class="ident">k</span>.<span class="ident">as_bytes</span>())<span class="question-mark">?</span>; <span class="kw">unsafe</span> { <span class="ident">ENV_LOCK</span>.<span class="ident">lock</span>(); <span class="kw">let</span> <span class="ident">s</span> <span class="op">=</span> <span class="ident">libc</span>::<span class="ident">getenv</span>(<span class="ident">k</span>.<span class="ident">as_ptr</span>()) <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">libc</span>::<span class="ident">c_char</span>; <span class="kw">let</span> <span class="ident">ret</span> <span class="op">=</span> <span class="kw">if</span> <span class="ident">s</span>.<span class="ident">is_null</span>() { <span class="prelude-val">None</span> } <span class="kw">else</span> { <span class="prelude-val">Some</span>(<span class="ident">OsStringExt</span>::<span class="ident">from_vec</span>(<span class="ident">CStr</span>::<span class="ident">from_ptr</span>(<span class="ident">s</span>).<span class="ident">to_bytes</span>().<span class="ident">to_vec</span>())) }; <span class="ident">ENV_LOCK</span>.<span class="ident">unlock</span>(); <span class="kw">return</span> <span class="prelude-val">Ok</span>(<span class="ident">ret</span>) } } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">setenv</span>(<span class="ident">k</span>: <span class="kw-2">&</span><span class="ident">OsStr</span>, <span class="ident">v</span>: <span class="kw-2">&</span><span class="ident">OsStr</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { <span class="kw">let</span> <span class="ident">k</span> <span class="op">=</span> <span class="ident">CString</span>::<span class="ident">new</span>(<span class="ident">k</span>.<span class="ident">as_bytes</span>())<span class="question-mark">?</span>; <span class="kw">let</span> <span class="ident">v</span> <span class="op">=</span> <span class="ident">CString</span>::<span class="ident">new</span>(<span class="ident">v</span>.<span class="ident">as_bytes</span>())<span class="question-mark">?</span>; <span class="kw">unsafe</span> { <span class="ident">ENV_LOCK</span>.<span class="ident">lock</span>(); <span class="kw">let</span> <span class="ident">ret</span> <span class="op">=</span> <span class="ident">cvt</span>(<span class="ident">libc</span>::<span class="ident">setenv</span>(<span class="ident">k</span>.<span class="ident">as_ptr</span>(), <span class="ident">v</span>.<span class="ident">as_ptr</span>(), <span class="number">1</span>)).<span class="ident">map</span>(<span class="op">|</span>_<span class="op">|</span> ()); <span class="ident">ENV_LOCK</span>.<span class="ident">unlock</span>(); <span class="kw">return</span> <span class="ident">ret</span> } } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">unsetenv</span>(<span class="ident">n</span>: <span class="kw-2">&</span><span class="ident">OsStr</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { <span class="kw">let</span> <span class="ident">nbuf</span> <span class="op">=</span> <span class="ident">CString</span>::<span class="ident">new</span>(<span class="ident">n</span>.<span class="ident">as_bytes</span>())<span class="question-mark">?</span>; <span class="kw">unsafe</span> { <span class="ident">ENV_LOCK</span>.<span class="ident">lock</span>(); <span class="kw">let</span> <span class="ident">ret</span> <span class="op">=</span> <span class="ident">cvt</span>(<span class="ident">libc</span>::<span class="ident">unsetenv</span>(<span class="ident">nbuf</span>.<span class="ident">as_ptr</span>())).<span class="ident">map</span>(<span class="op">|</span>_<span class="op">|</span> ()); <span class="ident">ENV_LOCK</span>.<span class="ident">unlock</span>(); <span class="kw">return</span> <span class="ident">ret</span> } } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">page_size</span>() <span class="op">-></span> <span class="ident">usize</span> { <span class="kw">unsafe</span> { <span class="ident">libc</span>::<span class="ident">sysconf</span>(<span class="ident">libc</span>::<span class="ident">_SC_PAGESIZE</span>) <span class="kw">as</span> <span class="ident">usize</span> } } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">temp_dir</span>() <span class="op">-></span> <span class="ident">PathBuf</span> { ::<span class="ident">env</span>::<span class="ident">var_os</span>(<span class="string">"TMPDIR"</span>).<span class="ident">map</span>(<span class="ident">PathBuf</span>::<span class="ident">from</span>).<span class="ident">unwrap_or_else</span>(<span class="op">||</span> { <span class="kw">if</span> <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"android"</span>) { <span class="ident">PathBuf</span>::<span class="ident">from</span>(<span class="string">"/data/local/tmp"</span>) } <span class="kw">else</span> { <span class="ident">PathBuf</span>::<span class="ident">from</span>(<span class="string">"/tmp"</span>) } }) } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">home_dir</span>() <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">PathBuf</span><span class="op">></span> { <span class="kw">return</span> ::<span class="ident">env</span>::<span class="ident">var_os</span>(<span class="string">"HOME"</span>).<span class="ident">or_else</span>(<span class="op">||</span> <span class="kw">unsafe</span> { <span class="ident">fallback</span>() }).<span class="ident">map</span>(<span class="ident">PathBuf</span>::<span class="ident">from</span>); <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"android"</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"ios"</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"emscripten"</span>))]</span> <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">fallback</span>() <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">OsString</span><span class="op">></span> { <span class="prelude-val">None</span> } <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">any</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"android"</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"ios"</span>, <span class="ident">target_os</span> <span class="op">=</span> <span class="string">"emscripten"</span>)))]</span> <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">fallback</span>() <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">OsString</span><span class="op">></span> { <span class="kw">let</span> <span class="ident">amt</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">libc</span>::<span class="ident">sysconf</span>(<span class="ident">libc</span>::<span class="ident">_SC_GETPW_R_SIZE_MAX</span>) { <span class="ident">n</span> <span class="kw">if</span> <span class="ident">n</span> <span class="op"><</span> <span class="number">0</span> <span class="op">=></span> <span class="number">512</span> <span class="kw">as</span> <span class="ident">usize</span>, <span class="ident">n</span> <span class="op">=></span> <span class="ident">n</span> <span class="kw">as</span> <span class="ident">usize</span>, }; <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">with_capacity</span>(<span class="ident">amt</span>); <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">passwd</span>: <span class="ident">libc</span>::<span class="ident">passwd</span> <span class="op">=</span> <span class="ident">mem</span>::<span class="ident">zeroed</span>(); <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">result</span> <span class="op">=</span> <span class="ident">ptr</span>::<span class="ident">null_mut</span>(); <span class="kw">match</span> <span class="ident">libc</span>::<span class="ident">getpwuid_r</span>(<span class="ident">libc</span>::<span class="ident">getuid</span>(), <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">passwd</span>, <span class="ident">buf</span>.<span class="ident">as_mut_ptr</span>(), <span class="ident">buf</span>.<span class="ident">capacity</span>(), <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">result</span>) { <span class="number">0</span> <span class="kw">if</span> <span class="op">!</span><span class="ident">result</span>.<span class="ident">is_null</span>() <span class="op">=></span> { <span class="kw">let</span> <span class="ident">ptr</span> <span class="op">=</span> <span class="ident">passwd</span>.<span class="ident">pw_dir</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> _; <span class="kw">let</span> <span class="ident">bytes</span> <span class="op">=</span> <span class="ident">CStr</span>::<span class="ident">from_ptr</span>(<span class="ident">ptr</span>).<span class="ident">to_bytes</span>().<span class="ident">to_vec</span>(); <span class="prelude-val">Some</span>(<span class="ident">OsStringExt</span>::<span class="ident">from_vec</span>(<span class="ident">bytes</span>)) }, _ <span class="op">=></span> <span class="prelude-val">None</span>, } } } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">exit</span>(<span class="ident">code</span>: <span class="ident">i32</span>) <span class="op">-></span> <span class="op">!</span> { <span class="kw">unsafe</span> { <span class="ident">libc</span>::<span class="ident">exit</span>(<span class="ident">code</span> <span class="kw">as</span> <span class="ident">c_int</span>) } } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">getpid</span>() <span class="op">-></span> <span class="ident">u32</span> { <span class="kw">unsafe</span> { <span class="ident">libc</span>::<span class="ident">getpid</span>() <span class="kw">as</span> <span class="ident">u32</span> } } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">getppid</span>() <span class="op">-></span> <span class="ident">u32</span> { <span class="kw">unsafe</span> { <span class="ident">libc</span>::<span class="ident">getppid</span>() <span class="kw">as</span> <span class="ident">u32</span> } } </pre> </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 = "../../../../"; 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