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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="Create a new temporary file in the specified directory."><title>tempfile_in in tempfile - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../static.files/rustdoc-42caa33d.css"><meta name="rustdoc-vars" data-root-path="../" data-static-root-path="../static.files/" data-current-crate="tempfile" data-themes="" data-resource-suffix="" data-rustdoc-version="1.84.1 (e71f9a9a9 2025-01-27)" data-channel="1.84.1" data-search-js="search-92e6798f.js" data-settings-js="settings-0f613d39.js" ><script src="../static.files/storage-59e33391.js"></script><script defer src="sidebar-items.js"></script><script defer src="../static.files/main-5f194d8c.js"></script><noscript><link rel="stylesheet" href="../static.files/noscript-893ab5e7.css"></noscript><link rel="icon" href="https://www.rust-lang.org/favicon.ico"></head><body class="rustdoc fn"><!--[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><a class="logo-container" href="../tempfile/index.html"><img src="https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png" alt=""></a></nav><nav class="sidebar"><div class="sidebar-crate"><a class="logo-container" href="../tempfile/index.html"><img src="https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png" alt="logo"></a><h2><a href="../tempfile/index.html">tempfile</a><span class="version">3.14.0</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">tempfile_<wbr>in</a></h2><h3><a href="#">Sections</a></h3><ul class="block top-toc"><li><a href="#security" title="Security">Security</a></li><li><a href="#resource-leaking" title="Resource Leaking">Resource Leaking</a></li><li><a href="#errors" title="Errors">Errors</a></li><li><a href="#examples" title="Examples">Examples</a></li></ul></section><div id="rustdoc-modnav"><h2 class="in-crate"><a href="index.html">In crate tempfile</a></h2></div></div></nav><div class="sidebar-resizer"></div><main><div class="width-limiter"><rustdoc-search></rustdoc-search><section id="main-content" class="content"><div class="main-heading"><span class="rustdoc-breadcrumbs"><a href="index.html">tempfile</a></span><h1>Function <span class="fn">tempfile_in</span><button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../src/tempfile/file/mod.rs.html#83-85">Source</a> </span></div><pre class="rust item-decl"><code>pub fn tempfile_in&lt;P: <a class="trait" href="https://doc.rust-lang.org/1.84.1/core/convert/trait.AsRef.html" title="trait core::convert::AsRef">AsRef</a>&lt;<a class="struct" href="https://doc.rust-lang.org/1.84.1/std/path/struct.Path.html" title="struct std::path::Path">Path</a>&gt;&gt;(dir: P) -&gt; <a class="type" href="https://doc.rust-lang.org/1.84.1/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="struct" href="https://doc.rust-lang.org/1.84.1/std/fs/struct.File.html" title="struct std::fs::File">File</a>&gt;</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Create a new temporary file in the specified directory.</p>
<h2 id="security"><a class="doc-anchor" href="#security">§</a>Security</h2>
<p>This variant is secure/reliable in the presence of a pathological temporary file cleaner.
If the temporary file isnt created in <a href="env/fn.temp_dir.html" title="fn tempfile::env::temp_dir"><code>env::temp_dir()</code></a> then temporary file cleaners arent an issue.</p>
<h2 id="resource-leaking"><a class="doc-anchor" href="#resource-leaking">§</a>Resource Leaking</h2>
<p>The temporary file will be automatically removed by the OS when the last handle to it is closed.
This doesnt rely on Rust destructors being run, so will (almost) never fail to clean up the temporary file.</p>
<h2 id="errors"><a class="doc-anchor" href="#errors">§</a>Errors</h2>
<p>If the file can not be created, <code>Err</code> is returned.</p>
<h2 id="examples"><a class="doc-anchor" href="#examples">§</a>Examples</h2>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>tempfile::tempfile_in;
<span class="kw">use </span>std::io::Write;
<span class="comment">// Create a file inside of the current working directory
</span><span class="kw">let </span><span class="kw-2">mut </span>file = tempfile_in(<span class="string">"./"</span>)<span class="question-mark">?</span>;
<span class="macro">writeln!</span>(file, <span class="string">"Brian was here. Briefly."</span>)<span class="question-mark">?</span>;</code></pre></div>
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