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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source to the Rust file `libstd/sys/unix/stdio.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>stdio.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="../../../../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 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">&#9776;</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"><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"><pre class="line-numbers"><span id="1"> 1</span>
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<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 &lt;LICENSE-APACHE or</span>
<span class="comment">// http://www.apache.org/licenses/LICENSE-2.0&gt; or the MIT license</span>
<span class="comment">// &lt;LICENSE-MIT or http://opensource.org/licenses/MIT&gt;, 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="kw">use</span> <span class="ident">io</span>;
<span class="kw">use</span> <span class="ident">libc</span>;
<span class="kw">use</span> <span class="ident">sys</span>::<span class="ident">fd</span>::<span class="ident">FileDesc</span>;

<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Stdin</span>(());
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Stdout</span>(());
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Stderr</span>(());

<span class="kw">impl</span> <span class="ident">Stdin</span> {
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>() <span class="op">-&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">Stdin</span><span class="op">&gt;</span> { <span class="prelude-val">Ok</span>(<span class="ident">Stdin</span>(())) }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">read</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">data</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> [<span class="ident">u8</span>]) <span class="op">-&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">usize</span><span class="op">&gt;</span> {
        <span class="kw">let</span> <span class="ident">fd</span> <span class="op">=</span> <span class="ident">FileDesc</span>::<span class="ident">new</span>(<span class="ident">libc</span>::<span class="ident">STDIN_FILENO</span>);
        <span class="kw">let</span> <span class="ident">ret</span> <span class="op">=</span> <span class="ident">fd</span>.<span class="ident">read</span>(<span class="ident">data</span>);
        <span class="ident">fd</span>.<span class="ident">into_raw</span>();
        <span class="ident">ret</span>
    }
}

<span class="kw">impl</span> <span class="ident">Stdout</span> {
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>() <span class="op">-&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">Stdout</span><span class="op">&gt;</span> { <span class="prelude-val">Ok</span>(<span class="ident">Stdout</span>(())) }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">write</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">data</span>: <span class="kw-2">&amp;</span>[<span class="ident">u8</span>]) <span class="op">-&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">usize</span><span class="op">&gt;</span> {
        <span class="kw">let</span> <span class="ident">fd</span> <span class="op">=</span> <span class="ident">FileDesc</span>::<span class="ident">new</span>(<span class="ident">libc</span>::<span class="ident">STDOUT_FILENO</span>);
        <span class="kw">let</span> <span class="ident">ret</span> <span class="op">=</span> <span class="ident">fd</span>.<span class="ident">write</span>(<span class="ident">data</span>);
        <span class="ident">fd</span>.<span class="ident">into_raw</span>();
        <span class="ident">ret</span>
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">flush</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
        <span class="prelude-val">Ok</span>(())
    }
}

<span class="kw">impl</span> <span class="ident">Stderr</span> {
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>() <span class="op">-&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">Stderr</span><span class="op">&gt;</span> { <span class="prelude-val">Ok</span>(<span class="ident">Stderr</span>(())) }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">write</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">data</span>: <span class="kw-2">&amp;</span>[<span class="ident">u8</span>]) <span class="op">-&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">usize</span><span class="op">&gt;</span> {
        <span class="kw">let</span> <span class="ident">fd</span> <span class="op">=</span> <span class="ident">FileDesc</span>::<span class="ident">new</span>(<span class="ident">libc</span>::<span class="ident">STDERR_FILENO</span>);
        <span class="kw">let</span> <span class="ident">ret</span> <span class="op">=</span> <span class="ident">fd</span>.<span class="ident">write</span>(<span class="ident">data</span>);
        <span class="ident">fd</span>.<span class="ident">into_raw</span>();
        <span class="ident">ret</span>
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">flush</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
        <span class="prelude-val">Ok</span>(())
    }
}

<span class="comment">// FIXME: right now this raw stderr handle is used in a few places because</span>
<span class="comment">//        std::io::stderr_raw isn&#39;t exposed, but once that&#39;s exposed this impl</span>
<span class="comment">//        should go away</span>
<span class="kw">impl</span> <span class="ident">io</span>::<span class="ident">Write</span> <span class="kw">for</span> <span class="ident">Stderr</span> {
    <span class="kw">fn</span> <span class="ident">write</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">data</span>: <span class="kw-2">&amp;</span>[<span class="ident">u8</span>]) <span class="op">-&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">usize</span><span class="op">&gt;</span> {
        <span class="ident">Stderr</span>::<span class="ident">write</span>(<span class="self">self</span>, <span class="ident">data</span>)
    }

    <span class="kw">fn</span> <span class="ident">flush</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-&gt;</span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
        <span class="ident">Stderr</span>::<span class="ident">flush</span>(<span class="self">self</span>)
    }
}

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_ebadf</span>(<span class="ident">err</span>: <span class="kw-2">&amp;</span><span class="ident">io</span>::<span class="ident">Error</span>) <span class="op">-&gt;</span> <span class="ident">bool</span> {
    <span class="ident">err</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">EBADF</span> <span class="kw">as</span> <span class="ident">i32</span>)
}

<span class="kw">pub</span> <span class="kw">const</span> <span class="ident">STDIN_BUF_SIZE</span>: <span class="ident">usize</span> <span class="op">=</span> ::<span class="ident">sys_common</span>::<span class="ident">io</span>::<span class="ident">DEFAULT_BUF_SIZE</span>;

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">stderr_prints_nothing</span>() <span class="op">-&gt;</span> <span class="ident">bool</span> {
    <span class="bool-val">false</span>
}
</pre>
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