rCore-Tutorial-v3/main/os/fs/trait.File.html

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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="API documentation for the Rust `File` trait in crate `os`."><title>File in os::fs - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceSerif4-Regular-46f98efaafac5295.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><link rel="stylesheet" href="../../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../../static.files/rustdoc-4e54bb2b497cc83f.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="os" data-themes="" data-resource-suffix="" data-rustdoc-version="1.77.0-nightly (6ae4cfbbb 2024-01-17)" data-channel="nightly" data-search-js="search-dd67cee4cfa65049.js" data-settings-js="settings-4313503d2e1961c2.js" ><script src="../../static.files/storage-f2adc0d6ca4d09fb.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-0b2e2def73e61cbe.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-04d5337699b92874.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-16x16-8b506e7a72182f1c.png"><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-422f7d1d52889060.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-2c020d218678b618.svg"></head><body class="rustdoc trait"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle" title="show sidebar"></button></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../os/index.html">os</a><span class="version">0.1.0</span></h2></div><h2 class="location"><a href="#">File</a></h2><div class="sidebar-elems"><section><h3><a href="#required-methods">Required Methods</a></h3><ul class="block"><li><a href="#tymethod.read">read</a></li><li><a href="#tymethod.readable">readable</a></li><li><a href="#tymethod.writable">writable</a></li><li><a href="#tymethod.write">write</a></li></ul><h3><a href="#implementors">Implementors</a></h3></section><h2><a href="index.html">In os::fs</a></h2></div></nav><div class="sidebar-resizer"></div>
<main><div class="width-limiter"><nav class="sub"><form class="search-form"><span></span><div id="sidebar-button" tabindex="-1"><a href="../../os/all.html" title="show sidebar"></a></div><input class="search-input" name="search" aria-label="Run search in the documentation" autocomplete="off" spellcheck="false" placeholder="Click or press S to search, ? for more options…" type="search"><div id="help-button" tabindex="-1"><a href="../../help.html" title="help">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../static.files/wheel-7b819b6101059cd0.svg"></a></div></form></nav><section id="main-content" class="content"><div class="main-heading"><h1>Trait <a href="../index.html">os</a>::<wbr><a href="index.html">fs</a>::<wbr><a class="trait" href="#">File</a><button id="copy-path" title="Copy item path to clipboard"><img src="../../static.files/clipboard-7571035ce49a181d.svg" width="19" height="18" alt="Copy item path"></button></h1><span class="out-of-band"><a class="src" href="../../src/os/fs/mod.rs.html#7-12">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>&#x2212;</span>]</button></span></div><pre class="rust item-decl"><code>pub trait File: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> {
// Required methods
fn <a href="#tymethod.readable" class="fn">readable</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.bool.html">bool</a>;
<span class="item-spacer"></span> fn <a href="#tymethod.writable" class="fn">writable</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.bool.html">bool</a>;
<span class="item-spacer"></span> fn <a href="#tymethod.read" class="fn">read</a>(&amp;self, buf: <a class="struct" href="../mm/page_table/struct.UserBuffer.html" title="struct os::mm::page_table::UserBuffer">UserBuffer</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.usize.html">usize</a>;
<span class="item-spacer"></span> fn <a href="#tymethod.write" class="fn">write</a>(&amp;self, buf: <a class="struct" href="../mm/page_table/struct.UserBuffer.html" title="struct os::mm::page_table::UserBuffer">UserBuffer</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.usize.html">usize</a>;
}</code></pre><h2 id="required-methods" class="section-header">Required Methods<a href="#required-methods" class="anchor">§</a></h2><div class="methods"><section id="tymethod.readable" class="method"><a class="src rightside" href="../../src/os/fs/mod.rs.html#8">source</a><h4 class="code-header">fn <a href="#tymethod.readable" class="fn">readable</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.bool.html">bool</a></h4></section><section id="tymethod.writable" class="method"><a class="src rightside" href="../../src/os/fs/mod.rs.html#9">source</a><h4 class="code-header">fn <a href="#tymethod.writable" class="fn">writable</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.bool.html">bool</a></h4></section><section id="tymethod.read" class="method"><a class="src rightside" href="../../src/os/fs/mod.rs.html#10">source</a><h4 class="code-header">fn <a href="#tymethod.read" class="fn">read</a>(&amp;self, buf: <a class="struct" href="../mm/page_table/struct.UserBuffer.html" title="struct os::mm::page_table::UserBuffer">UserBuffer</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.usize.html">usize</a></h4></section><section id="tymethod.write" class="method"><a class="src rightside" href="../../src/os/fs/mod.rs.html#11">source</a><h4 class="code-header">fn <a href="#tymethod.write" class="fn">write</a>(&amp;self, buf: <a class="struct" href="../mm/page_table/struct.UserBuffer.html" title="struct os::mm::page_table::UserBuffer">UserBuffer</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/core/primitive.usize.html">usize</a></h4></section></div><h2 id="implementors" class="section-header">Implementors<a href="#implementors" class="anchor">§</a></h2><div id="implementors-list"><section id="impl-File-for-PortFd" class="impl"><a class="src rightside" href="../../src/os/net/port_table.rs.html#125-141">source</a><a href="#impl-File-for-PortFd" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.File.html" title="trait os::fs::File">File</a> for <a class="struct" href="../net/port_table/struct.PortFd.html" title="struct os::net::port_table::PortFd">PortFd</a></h3></section><section id="impl-File-for-TCP" class="impl"><a class="src rightside" href="../../src/os/net/tcp.rs.html#41-107">source</a><a href="#impl-File-for-TCP" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.File.html" title="trait os::fs::File">File</a> for <a class="struct" href="../net/tcp/struct.TCP.html" title="struct os::net::tcp::TCP">TCP</a></h3></section><section id="impl-File-for-UDP" class="impl"><a class="src rightside" href="../../src/os/net/udp.rs.html#31-89">source</a><a href="#impl-File-for-UDP" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.File.html" title="trait os::fs::File">File</a> for <a class="struct" href="../net/udp/struct.UDP.html" title="struct os::net::udp::UDP">UDP</a></h3></section><section id="impl-File-for-OSInode" class="impl"><a class="src rightside" href="../../src/os/fs/inode.rs.html#108-139">source</a><a href="#impl-File-for-OSInode" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.File.html" title="trait os::fs::File">File</a> for <a class="struct" href="inode/struct.OSInode.html" title="struct os::fs::inode::OSInode">OSInode</a></h3></section><section id="impl-File-for-Pipe" class="impl"><a class="src rightside" href="../../src/os/fs/pipe.rs.html#108-173">source</a><a href="#impl-File-for-Pipe" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.File.html" title="trait os::fs::File">File</a> for <a class="struct" href="pipe/struct.Pipe.html" title="struct os::fs::pipe::Pipe">Pipe</a></h3></section><section id="impl-File-for-Stdin" class="impl"><a class="src rightside" href="../../src/os/fs/stdio.rs.html#9-28">source</a><a href="#impl-File-for-Stdin" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="trait.File.html" tit