| <!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 of the Rust file `/home/runner/.cargo/registry/src/github.com-1ecc6299db9ec823/getrandom-0.2.3/src/linux_android.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>linux_android.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Semibold.ttf.woff2"><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="../../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../../dark.css" disabled><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script src="../../crates.js"></script><script defer src="../../main.js"></script><script defer src="../../source-script.js"></script><script defer src="../../source-files.js"></script> |
| <noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="shortcut icon" href="https://www.rust-lang.org/favicon.ico"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu" role="button">☰</div><a class="sidebar-logo" href="../../getrandom/index.html"><div class="logo-container"><img src="https://www.rust-lang.org/logos/rust-logo-128x128-blk.png" alt="logo"></div> |
| </a></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../../getrandom/index.html"><img src="https://www.rust-lang.org/logos/rust-logo-128x128-blk.png" alt="logo"></a><nav class="sub"><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu" title="themes"><img width="18" height="18" alt="Pick another theme!" src="../../brush.svg"></button><div id="theme-choices" role="menu"></div></div><form class="search-form"><div class="search-container"><div> |
| <input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><button type="button" id="help-button" title="help">?</button><a id="settings-menu" href="../../settings.html" title="settings"><img width="18" height="18" alt="Change settings" src="../../wheel.svg"></a></div></form></nav></div><section id="main-content" class="content"><div class="example-wrap"><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 id="12">12</span> |
| <span id="13">13</span> |
| <span id="14">14</span> |
| <span id="15">15</span> |
| <span id="16">16</span> |
| <span id="17">17</span> |
| <span id="18">18</span> |
| <span id="19">19</span> |
| <span id="20">20</span> |
| <span id="21">21</span> |
| <span id="22">22</span> |
| <span id="23">23</span> |
| <span id="24">24</span> |
| <span id="25">25</span> |
| <span id="26">26</span> |
| <span id="27">27</span> |
| <span id="28">28</span> |
| <span id="29">29</span> |
| <span id="30">30</span> |
| <span id="31">31</span> |
| <span id="32">32</span> |
| <span id="33">33</span> |
| <span id="34">34</span> |
| <span id="35">35</span> |
| <span id="36">36</span> |
| <span id="37">37</span> |
| <span id="38">38</span> |
| <span id="39">39</span> |
| <span id="40">40</span> |
| <span id="41">41</span> |
| <span id="42">42</span> |
| <span id="43">43</span> |
| <span id="44">44</span> |
| <span id="45">45</span> |
| <span id="46">46</span> |
| </pre><pre class="rust"><code><span class="comment">// Copyright 2018 Developers of the Rand project.</span> |
| <span class="comment">//</span> |
| <span class="comment">// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or</span> |
| <span class="comment">// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license</span> |
| <span class="comment">// <LICENSE-MIT or https://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 for Linux / Android</span> |
| <span class="kw">use</span> <span class="kw">crate</span>::{ |
| <span class="ident">util::LazyBool</span>, |
| <span class="ident">util_libc</span>::{<span class="ident">last_os_error</span>, <span class="ident">sys_fill_exact</span>}, |
| {<span class="ident">use_file</span>, <span class="ident">Error</span>}, |
| }; |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">getrandom_inner</span>(<span class="ident">dest</span>: <span class="kw-2">&mut</span> [<span class="ident">u8</span>]) -> <span class="prelude-ty">Result</span><span class="op"><</span>(), <span class="ident">Error</span><span class="op">></span> { |
| <span class="kw">static</span> <span class="ident">HAS_GETRANDOM</span>: <span class="ident">LazyBool</span> <span class="op">=</span> <span class="ident">LazyBool::new</span>(); |
| <span class="kw">if</span> <span class="ident">HAS_GETRANDOM</span>.<span class="ident">unsync_init</span>(<span class="ident">is_getrandom_available</span>) { |
| <span class="ident">sys_fill_exact</span>(<span class="ident">dest</span>, <span class="op">|</span><span class="ident">buf</span><span class="op">|</span> <span class="kw">unsafe</span> { |
| <span class="ident">getrandom</span>(<span class="ident">buf</span>.<span class="ident">as_mut_ptr</span>() <span class="kw">as</span> <span class="kw-2">*mut</span> <span class="ident">libc::c_void</span>, <span class="ident">buf</span>.<span class="ident">len</span>(), <span class="number">0</span>) |
| }) |
| } <span class="kw">else</span> { |
| <span class="ident">use_file::getrandom_inner</span>(<span class="ident">dest</span>) |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">is_getrandom_available</span>() -> <span class="ident">bool</span> { |
| <span class="kw">let</span> <span class="ident">res</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">getrandom</span>(<span class="ident">core::ptr::null_mut</span>(), <span class="number">0</span>, <span class="ident">libc::GRND_NONBLOCK</span>) }; |
| <span class="kw">if</span> <span class="ident">res</span> <span class="op"><</span> <span class="number">0</span> { |
| <span class="kw">match</span> <span class="ident">last_os_error</span>().<span class="ident">raw_os_error</span>() { |
| <span class="prelude-val">Some</span>(<span class="ident">libc::ENOSYS</span>) => <span class="bool-val">false</span>, <span class="comment">// No kernel support</span> |
| <span class="prelude-val">Some</span>(<span class="ident">libc::EPERM</span>) => <span class="bool-val">false</span>, <span class="comment">// Blocked by seccomp</span> |
| <span class="kw">_</span> => <span class="bool-val">true</span>, |
| } |
| } <span class="kw">else</span> { |
| <span class="bool-val">true</span> |
| } |
| } |
| |
| <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">getrandom</span>( |
| <span class="ident">buf</span>: <span class="kw-2">*mut</span> <span class="ident">libc::c_void</span>, |
| <span class="ident">buflen</span>: <span class="ident">libc::size_t</span>, |
| <span class="ident">flags</span>: <span class="ident">libc::c_uint</span>, |
| ) -> <span class="ident">libc::ssize_t</span> { |
| <span class="ident">libc::syscall</span>(<span class="ident">libc::SYS_getrandom</span>, <span class="ident">buf</span>, <span class="ident">buflen</span>, <span class="ident">flags</span>) <span class="kw">as</span> <span class="ident">libc::ssize_t</span> |
| } |
| </code></pre></div> |
| </section><section id="search" class="content hidden"></section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="getrandom" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.60.0-nightly (1bd4fdc94 2022-01-12)" ></div> |
| </body></html> |
