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<p class='location'>Struct NamedTempFile</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#methods">Methods</a><div class="sidebar-links"><a href="#method.new">new</a><a href="#method.new_in">new_in</a><a href="#method.path">path</a><a href="#method.close">close</a><a href="#method.persist">persist</a></div><a class="sidebar-title" href="#deref-methods">Methods from Deref&lt;Target=File&gt;</a><div class="sidebar-links"><a href="#method.sync_all">sync_all</a><a href="#method.sync_data">sync_data</a><a href="#method.set_len">set_len</a><a href="#method.metadata">metadata</a><a href="#method.try_clone">try_clone</a><a href="#method.set_permissions">set_permissions</a></div><a class="sidebar-title" href="#implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-Debug">Debug</a><a href="#impl-Deref">Deref</a><a href="#impl-DerefMut">DerefMut</a><a href="#impl-Drop">Drop</a><a href="#impl-Read">Read</a><a href="#impl-Write">Write</a><a href="#impl-Seek">Seek</a><a href="#impl-AsRawFd">AsRawFd</a></div><a class="sidebar-title" href="#synthetic-implementations">Auto Trait Implementations</a><div class="sidebar-links"><a href="#impl-Send">Send</a><a href="#impl-Sync">Sync</a></div></div><p class='location'><a href='index.html'>tempfile</a></p><script>window.sidebarCurrent = {name: 'NamedTempFile', ty: 'struct', relpath: ''};</script><script defer src="sidebar-items.js"></script></div>
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<section id='main' class="content"><h1 class='fqn'><span class='in-band'>Struct <a href='index.html'>tempfile</a>::<wbr><a class="struct" href=''>NamedTempFile</a></span><span class='out-of-band'><span id='render-detail'>
<a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">
[<span class='inner'>&#x2212;</span>]
</a>
</span><a class='srclink' href='../src/tempfile/named.rs.html#23' title='goto source code'>[src]</a></span></h1><div class="docblock type-decl"><pre class='rust struct'>pub struct NamedTempFile(_);</pre></div><div class='docblock'><p>A named temporary file.</p>
<p>This variant is <em>NOT</em> secure/reliable in the presence of a pathological temporary file cleaner.</p>
<p>NamedTempFiles are deleted on drop. As rust doesn't guarantee that a struct will ever be
dropped, these temporary files will not be deleted on abort, resource leak, early exit, etc.</p>
<p>Please use TempFile unless you absolutely need a named file.</p>
</div>
<h2 id='methods' class='small-section-header'>
Methods<a href='#methods' class='anchor'></a>
</h2>
<h3 id='impl' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="struct" href="../tempfile/struct.NamedTempFile.html" title="struct tempfile::NamedTempFile">NamedTempFile</a></code><a href='#impl' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tempfile/named.rs.html#82-166' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.new' class="method"><span id='new.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.new' class='fnname'>new</a>() -&gt; <a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="struct" href="../tempfile/struct.NamedTempFile.html" title="struct tempfile::NamedTempFile">NamedTempFile</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tempfile/named.rs.html#113-115' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Create a new temporary file.</p>
<p><em>SECURITY WARNING:</em> This will create a temporary file in the default temporary file
directory (platform dependent). These directories are often patrolled by temporary file
cleaners so only use this method if you're <em>positive</em> that the temporary file cleaner won't
delete your file.</p>
<p>Reasons to use this method:</p>
<ol>
<li>The file has a short lifetime and your temporary file cleaner is sane (doesn't delete
recently accessed files).</li>
<li>You trust every user on your system (i.e. you are the only user).</li>
<li>You have disabled your system's temporary file cleaner or verified that your system
doesn't have a temporary file cleaner.</li>
</ol>
<p>Reasons not to use this method:</p>
<ol>
<li>You'll fix it later. No you won't.</li>
<li>You don't care about the security of the temporary file. If none of the &quot;reasons to
use this method&quot; apply, referring to a temporary file by name may allow an attacker
to create/overwrite your non-temporary files. There are exceptions but if you don't
already know them, don't use this method.</li>
</ol>
</div><h4 id='method.new_in' class="method"><span id='new_in.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.new_in' class='fnname'>new_in</a>&lt;P:&nbsp;<a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.AsRef.html" title="trait core::convert::AsRef">AsRef</a>&lt;<a class="struct" href="https://doc.rust-lang.org/nightly/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/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="struct" href="../tempfile/struct.NamedTempFile.html" title="struct tempfile::NamedTempFile">NamedTempFile</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tempfile/named.rs.html#118-129' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Create a new temporary file in the specified directory.</p>
</div><h4 id='method.path' class="method"><span id='path.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.path' class='fnname'>path</a>(&amp;self) -&gt; &amp;<a class="struct" href="https://doc.rust-lang.org/nightly/std/path/struct.Path.html" title="struct std::path::Path">Path</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tempfile/named.rs.html#137-139' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Get the temporary file's path.</p>
<p><em>SECURITY WARNING:</em> Only use this method if you're positive that a temporary file cleaner
won't have deleted your file. Otherwise, the path returned by this method may refer to an
attacker controlled file.</p>
</div><h4 id='method.close' class="method"><span id='close.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.close' class='fnname'>close</a>(self) -&gt; <a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tempfile/named.rs.html#144-148' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Close and remove the temporary file.</p>
<p>Use this if you want to detect errors in deleting the file.</p>
</div><h4 id='method.persist' class="method"><span id='persist.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.persist' class='fnname'>persist</a>&lt;P:&nbsp;<a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.AsRef.html" title="trait core::convert::AsRef">AsRef</a>&lt;<a class="struct" href="https://doc.rust-lang.org/nightly/std/path/struct.Path.html" title="struct std::path::Path">Path</a>&gt;&gt;(self, new_path: P) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="struct" href="https://doc.rust-lang.org/nightly/std/fs/struct.File.html" title="struct std::fs::File">File</a>, PersistError&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tempfile/named.rs.html#160-165' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Persist the temporary file at the target path.</p>
<p>If a file exists at the target path, persist will atomically replace it. If this method
fails, it will return <code>self</code> in the resulting PersistError.</p>
<p>Note: Temporary files cannot be persisted across filesystems.</p>
<p><em>SECURITY WARNING:</em> Only use this method if you're positive that a temporary file cleaner
won't have deleted your file. Otherwise, you might end up persisting an attacker controlled
file.</p>
</div></div>
<h2 id='deref-methods' class='small-section-header'>
Methods from <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/deref/trait.Deref.html" title="trait core::ops::deref::Deref">Deref</a>&lt;Target = <a class="struct" href="https://doc.rust-lang.org/nightly/std/fs/struct.File.html" title="struct std::fs::File">File</a>&gt;<a href='#deref-methods' class='anchor'></a>
</h2>
<div class='impl-items'><h4 id='method.sync_all' class="method"><span id='sync_all.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.sync_all' class='fnname'>sync_all</a>(&amp;self) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/error/struct.Error.html" title="struct std::io::error::Error">Error</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/fs.rs.html#409-411' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Attempts to sync all OS-internal metadata to disk.</p>
<p>This function will attempt to ensure that all in-core data reaches the
filesystem before returning.</p>
<h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fs</span>::<span class="ident">File</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">io</span>::<span class="ident">prelude</span>::<span class="kw-2">*</span>;
<span class="kw">fn</span> <span class="ident">main</span>() <span class="op">-&gt;</span> <span class="ident">std</span>::<span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">f</span> <span class="op">=</span> <span class="ident">File</span>::<span class="ident">create</span>(<span class="string">&quot;foo.txt&quot;</span>)<span class="question-mark">?</span>;
<span class="ident">f</span>.<span class="ident">write_all</span>(<span class="string">b&quot;Hello, world!&quot;</span>)<span class="question-mark">?</span>;
<span class="ident">f</span>.<span class="ident">sync_all</span>()<span class="question-mark">?</span>;
<span class="prelude-val">Ok</span>(())
}</pre>
</div><h4 id='method.sync_data' class="method"><span id='sync_data.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.sync_data' class='fnname'>sync_data</a>(&amp;self) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/error/struct.Error.html" title="struct std::io::error::Error">Error</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/fs.rs.html#440-442' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>This function is similar to <a href="struct.File.html#method.sync_all"><code>sync_all</code></a>, except that it may not
synchronize file metadata to the filesystem.</p>
<p>This is intended for use cases that must synchronize content, but don't
need the metadata on disk. The goal of this method is to reduce disk
operations.</p>
<p>Note that some platforms may simply implement this in terms of
<a href="struct.File.html#method.sync_all"><code>sync_all</code></a>.</p>
<h1 id="examples-1" class="section-header"><a href="#examples-1">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fs</span>::<span class="ident">File</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">io</span>::<span class="ident">prelude</span>::<span class="kw-2">*</span>;
<span class="kw">fn</span> <span class="ident">main</span>() <span class="op">-&gt;</span> <span class="ident">std</span>::<span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">f</span> <span class="op">=</span> <span class="ident">File</span>::<span class="ident">create</span>(<span class="string">&quot;foo.txt&quot;</span>)<span class="question-mark">?</span>;
<span class="ident">f</span>.<span class="ident">write_all</span>(<span class="string">b&quot;Hello, world!&quot;</span>)<span class="question-mark">?</span>;
<span class="ident">f</span>.<span class="ident">sync_data</span>()<span class="question-mark">?</span>;
<span class="prelude-val">Ok</span>(())
}</pre>
</div><h4 id='method.set_len' class="method"><span id='set_len.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.set_len' class='fnname'>set_len</a>(&amp;self, size: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u64.html">u64</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/error/struct.Error.html" title="struct std::io::error::Error">Error</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/fs.rs.html#475-477' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Truncates or extends the underlying file, updating the size of
this file to become <code>size</code>.</p>
<p>If the <code>size</code> is less than the current file's size, then the file will
be shrunk. If it is greater than the current file's size, then the file
will be extended to <code>size</code> and have all of the intermediate data filled
in with 0s.</p>
<p>The file's cursor isn't changed. In particular, if the cursor was at the
end and the file is shrunk using this operation, the cursor will now be
past the end.</p>
<h1 id="errors" class="section-header"><a href="#errors">Errors</a></h1>
<p>This function will return an error if the file is not opened for writing.</p>
<h1 id="examples-2" class="section-header"><a href="#examples-2">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fs</span>::<span class="ident">File</span>;
<span class="kw">fn</span> <span class="ident">main</span>() <span class="op">-&gt;</span> <span class="ident">std</span>::<span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">f</span> <span class="op">=</span> <span class="ident">File</span>::<span class="ident">create</span>(<span class="string">&quot;foo.txt&quot;</span>)<span class="question-mark">?</span>;
<span class="ident">f</span>.<span class="ident">set_len</span>(<span class="number">10</span>)<span class="question-mark">?</span>;
<span class="prelude-val">Ok</span>(())
}</pre>
<p>Note that this method alters the content of the underlying file, even
though it takes <code>&amp;self</code> rather than <code>&amp;mut self</code>.</p>
</div><h4 id='method.metadata' class="method"><span id='metadata.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.metadata' class='fnname'>metadata</a>(&amp;self) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="struct" href="https://doc.rust-lang.org/nightly/std/fs/struct.Metadata.html" title="struct std::fs::Metadata">Metadata</a>, <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/error/struct.Error.html" title="struct std::io::error::Error">Error</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/fs.rs.html#493-495' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Queries metadata about the underlying file.</p>
<h1 id="examples-3" class="section-header"><a href="#examples-3">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fs</span>::<span class="ident">File</span>;
<span class="kw">fn</span> <span class="ident">main</span>() <span class="op">-&gt;</span> <span class="ident">std</span>::<span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">f</span> <span class="op">=</span> <span class="ident">File</span>::<span class="ident">open</span>(<span class="string">&quot;foo.txt&quot;</span>)<span class="question-mark">?</span>;
<span class="kw">let</span> <span class="ident">metadata</span> <span class="op">=</span> <span class="ident">f</span>.<span class="ident">metadata</span>()<span class="question-mark">?</span>;
<span class="prelude-val">Ok</span>(())
}</pre>
</div><h4 id='method.try_clone' class="method"><span id='try_clone.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.try_clone' class='fnname'>try_clone</a>(&amp;self) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="struct" href="https://doc.rust-lang.org/nightly/std/fs/struct.File.html" title="struct std::fs::File">File</a>, <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/error/struct.Error.html" title="struct std::io::error::Error">Error</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.9.0'>1.9.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/fs.rs.html#537-541' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Create a new <code>File</code> instance that shares the same underlying file handle
as the existing <code>File</code> instance. Reads, writes, and seeks will affect
both <code>File</code> instances simultaneously.</p>
<h1 id="examples-4" class="section-header"><a href="#examples-4">Examples</a></h1>
<p>Create two handles for a file named <code>foo.txt</code>:</p>
<pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fs</span>::<span class="ident">File</span>;
<span class="kw">fn</span> <span class="ident">main</span>() <span class="op">-&gt;</span> <span class="ident">std</span>::<span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">file</span> <span class="op">=</span> <span class="ident">File</span>::<span class="ident">open</span>(<span class="string">&quot;foo.txt&quot;</span>)<span class="question-mark">?</span>;
<span class="kw">let</span> <span class="ident">file_copy</span> <span class="op">=</span> <span class="ident">file</span>.<span class="ident">try_clone</span>()<span class="question-mark">?</span>;
<span class="prelude-val">Ok</span>(())
}</pre>
<p>Assuming there’s a file named <code>foo.txt</code> with contents <code>abcdef\n</code>, create
two handles, seek one of them, and read the remaining bytes from the
other handle:</p>
<pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fs</span>::<span class="ident">File</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">io</span>::<span class="ident">SeekFrom</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">io</span>::<span class="ident">prelude</span>::<span class="kw-2">*</span>;
<span class="kw">fn</span> <span class="ident">main</span>() <span class="op">-&gt;</span> <span class="ident">std</span>::<span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">file</span> <span class="op">=</span> <span class="ident">File</span>::<span class="ident">open</span>(<span class="string">&quot;foo.txt&quot;</span>)<span class="question-mark">?</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">file_copy</span> <span class="op">=</span> <span class="ident">file</span>.<span class="ident">try_clone</span>()<span class="question-mark">?</span>;
<span class="ident">file</span>.<span class="ident">seek</span>(<span class="ident">SeekFrom</span>::<span class="ident">Start</span>(<span class="number">3</span>))<span class="question-mark">?</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">contents</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[];
<span class="ident">file_copy</span>.<span class="ident">read_to_end</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">contents</span>)<span class="question-mark">?</span>;
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">contents</span>, <span class="string">b&quot;def\n&quot;</span>);
<span class="prelude-val">Ok</span>(())
}</pre>
</div><h4 id='method.set_permissions' class="method"><span id='set_permissions.v' class='invisible'><table class='table-display'><tbody><tr><td><code>pub fn <a href='#method.set_permissions' class='fnname'>set_permissions</a>(&amp;self, perm: <a class="struct" href="https://doc.rust-lang.org/nightly/std/fs/struct.Permissions.html" title="struct std::fs::Permissions">Permissions</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/error/struct.Error.html" title="struct std::io::error::Error">Error</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.16.0'>1.16.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/fs.rs.html#576-578' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Changes the permissions on the underlying file.</p>
<h1 id="platform-specific-behavior" class="section-header"><a href="#platform-specific-behavior">Platform-specific behavior</a></h1>
<p>This function currently corresponds to the <code>fchmod</code> function on Unix and
the <code>SetFileInformationByHandle</code> function on Windows. Note that, this
<a href="../io/index.html#platform-specific-behavior">may change in the future</a>.</p>
<h1 id="errors-1" class="section-header"><a href="#errors-1">Errors</a></h1>
<p>This function will return an error if the user lacks permission change
attributes on the underlying file. It may also return an error in other
os-specific unspecified cases.</p>
<h1 id="examples-5" class="section-header"><a href="#examples-5">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">fn</span> <span class="ident">main</span>() <span class="op">-&gt;</span> <span class="ident">std</span>::<span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fs</span>::<span class="ident">File</span>;
<span class="kw">let</span> <span class="ident">file</span> <span class="op">=</span> <span class="ident">File</span>::<span class="ident">open</span>(<span class="string">&quot;foo.txt&quot;</span>)<span class="question-mark">?</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">perms</span> <span class="op">=</span> <span class="ident">file</span>.<span class="ident">metadata</span>()<span class="question-mark">?</span>.<span class="ident">permissions</span>();
<span class="ident">perms</span>.<span class="ident">set_readonly</span>(<span class="bool-val">true</span>);
<span class="ident">file</span>.<span class="ident">set_permissions</span>(<span class="ident">perms</span>)<span class="question-mark">?</span>;
<span class="prelude-val">Ok</span>(())
}</pre>
<p>Note that this method alters the permissions of the underlying file,
even though it takes <code>&amp;self</code> rather than <code>&amp;mut self</code>.</p>
</div></div>
<h2 id='implementations' class='small-section-header'>
Trait Implementations<a href='#implementations' class='anchor'></a>
</h2>
<div id='implementations-list'>
<h3 id='impl-Debug' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="../tempfile/struct.NamedTempFile.html" title="struct tempfile::NamedTempFile">NamedTempFile</a></code><a href='#impl-Debug' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tempfile/named.rs.html#30-34' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.fmt' class="method"><span id='fmt.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt' class='fnname'>fmt</a>(&amp;self, f: &amp;mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tempfile/named.rs.html#31-33' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></p>
</div></div><h3 id='impl-Deref' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/deref/trait.Deref.html" title="trait core::ops::deref::Deref">Deref</a> for <a class="struct" href="../tempfile/struct.NamedTempFile.html" title="struct tempfile::NamedTempFile">NamedTempFile</a></code><a href='#impl-Deref' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tempfile/named.rs.html#36-42' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='associatedtype.Target' class="type"><span id='Target.t' class='invisible'><code>type <a href='https://doc.rust-lang.org/nightly/core/ops/deref/trait.Deref.html#associatedtype.Target' class="type">Target</a> = <a class="struct" href="https://doc.rust-lang.org/nightly/std/fs/struct.File.html" title="struct std::fs::File">File</a></code></span></h4>
<div class='docblock'><p>The resulting type after dereferencing.</p>
</div><h4 id='method.deref' class="method"><div class="important-traits"><div class='tooltip'>ⓘ<span class='tooltiptext'>Important traits for &amp;'a <a class="struct" href="https://doc.rust-lang.org/nightly/std/fs/struct.File.html" title="struct std::fs::File">File</a></span></div><div class="content hidden"><h3 class="important">Important traits for &amp;'a <a class="struct" href="https://doc.rust-lang.org/nightly/std/fs/struct.File.html" title="struct std::fs::File">File</a></h3><code class="content"><span class="where fmt-newline">impl&lt;'a&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html" title="trait std::io::Read">Read</a> for &amp;'a <a class="struct" href="https://doc.rust-lang.org/nightly/std/fs/struct.File.html" title="struct std::fs::File">File</a></span><span class="where fmt-newline">impl <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html" title="trait std::io::Read">Read</a> for <a class="struct" href="https://doc.rust-lang.org/nightly/std/fs/struct.File.html" title="struct std::fs::File">File</a></span><span class="where fmt-newline">impl&lt;'a&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Write.html" title="trait std::io::Write">Write</a> for &amp;'a <a class="struct" href="https://doc.rust-lang.org/nightly/std/fs/struct.File.html" title="struct std::fs::File">File</a></span><span class="where fmt-newline">impl <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Write.html" title="trait std::io::Write">Write</a> for <a class="struct" href="https://doc.rust-lang.org/nightly/std/fs/struct.File.html" title="struct std::fs::File">File</a></span></code></div></div><span id='deref.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/core/ops/deref/trait.Deref.html#tymethod.deref' class='fnname'>deref</a>(&amp;self) -&gt; &amp;<a class="struct" href="https://doc.rust-lang.org/nightly/std/fs/struct.File.html" title="struct std::fs::File">File</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tempfile/named.rs.html#39-41' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Dereferences the value.</p>
</div></div><h3 id='impl-DerefMut' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/deref/trait.DerefMut.html" title="trait core::ops::deref::DerefMut">DerefMut</a> for <a class="struct" href="../tempfile/struct.NamedTempFile.html" title="struct tempfile::NamedTempFile">NamedTempFile</a></code><a href='#impl-DerefMut' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tempfile/named.rs.html#44-49' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.deref_mut' class="method"><div class="important-traits"><div class='tooltip'>ⓘ<span class='tooltiptext'>Important traits for &amp;'a <a class="struct" href="https://doc.rust-lang.org/nightly/std/fs/struct.File.html" title="struct std::fs::File">File</a></span></div><div class="content hidden"><h3 class="important">Important traits for &amp;'a <a class="struct" href="https://doc.rust-lang.org/nightly/std/fs/struct.File.html" title="struct std::fs::File">File</a></h3><code class="content"><span class="where fmt-newline">impl&lt;'a&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html" title="trait std::io::Read">Read</a> for &amp;'a <a class="struct" href="https://doc.rust-lang.org/nightly/std/fs/struct.File.html" title="struct std::fs::File">File</a></span><span class="where fmt-newline">impl <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html" title="trait std::io::Read">Read</a> for <a class="struct" href="https://doc.rust-lang.org/nightly/std/fs/struct.File.html" title="struct std::fs::File">File</a></span><span class="where fmt-newline">impl&lt;'a&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Write.html" title="trait std::io::Write">Write</a> for &amp;'a <a class="struct" href="https://doc.rust-lang.org/nightly/std/fs/struct.File.html" title="struct std::fs::File">File</a></span><span class="where fmt-newline">impl <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Write.html" title="trait std::io::Write">Write</a> for <a class="struct" href="https://doc.rust-lang.org/nightly/std/fs/struct.File.html" title="struct std::fs::File">File</a></span></code></div></div><span id='deref_mut.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/core/ops/deref/trait.DerefMut.html#tymethod.deref_mut' class='fnname'>deref_mut</a>(&amp;mut self) -&gt; &amp;mut <a class="struct" href="https://doc.rust-lang.org/nightly/std/fs/struct.File.html" title="struct std::fs::File">File</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tempfile/named.rs.html#46-48' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Mutably dereferences the value.</p>
</div></div><h3 id='impl-Drop' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/drop/trait.Drop.html" title="trait core::ops::drop::Drop">Drop</a> for <a class="struct" href="../tempfile/struct.NamedTempFile.html" title="struct tempfile::NamedTempFile">NamedTempFile</a></code><a href='#impl-Drop' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tempfile/named.rs.html#168-175' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.drop' class="method"><span id='drop.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/core/ops/drop/trait.Drop.html#tymethod.drop' class='fnname'>drop</a>(&amp;mut self)</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tempfile/named.rs.html#169-174' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Executes the destructor for this type. <a href="https://doc.rust-lang.org/nightly/core/ops/drop/trait.Drop.html#tymethod.drop">Read more</a></p>
</div></div><h3 id='impl-Read' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html" title="trait std::io::Read">Read</a> for <a class="struct" href="../tempfile/struct.NamedTempFile.html" title="struct tempfile::NamedTempFile">NamedTempFile</a></code><a href='#impl-Read' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tempfile/named.rs.html#177-181' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.read' class="method"><span id='read.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Read.html#tymethod.read' class='fnname'>read</a>(&amp;mut self, buf: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;mut [</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tempfile/named.rs.html#178-180' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Pull some bytes from this source into the specified buffer, returning how many bytes were read. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html#tymethod.read">Read more</a></p>
</div><h4 id='method.initializer' class="method"><span id='initializer.v' class='invisible'><table class='table-display'><tbody><tr><td><code>unsafe fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.initializer' class='fnname'>initializer</a>(&amp;self) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/struct.Initializer.html" title="struct std::io::Initializer">Initializer</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/io/mod.rs.html#552-554' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='stability'><div class='stab unstable'><span class=microscope>🔬</span> This is a nightly-only experimental API. (<code>read_initializer</code>)</div></div><div class='docblock'><p>Determines if this <code>Read</code>er can work with buffers of uninitialized memory. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.initializer">Read more</a></p>
</div><h4 id='method.read_to_end' class="method"><span id='read_to_end.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end' class='fnname'>read_to_end</a>(&amp;mut self, buf: &amp;mut <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/vec/struct.Vec.html" title="struct alloc::vec::Vec">Vec</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>&gt;) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/error/struct.Error.html" title="struct std::io::error::Error">Error</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/io/mod.rs.html#599-601' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Read all bytes until EOF in this source, placing them into <code>buf</code>. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_end">Read more</a></p>
</div><h4 id='method.read_to_string' class="method"><span id='read_to_string.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_string' class='fnname'>read_to_string</a>(&amp;mut self, buf: &amp;mut <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/string/struct.String.html" title="struct alloc::string::String">String</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/error/struct.Error.html" title="struct std::io::error::Error">Error</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/io/mod.rs.html#637-648' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Read all bytes until EOF in this source, appending them to <code>buf</code>. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_to_string">Read more</a></p>
</div><h4 id='method.read_exact' class="method"><span id='read_exact.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact' class='fnname'>read_exact</a>(&amp;mut self, buf: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;mut [</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/error/struct.Error.html" title="struct std::io::error::Error">Error</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.6.0'>1.6.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/io/mod.rs.html#700-715' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Read the exact number of bytes required to fill <code>buf</code>. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.read_exact">Read more</a></p>
</div><h4 id='method.by_ref' class="method"><div class="important-traits"><div class='tooltip'>ⓘ<span class='tooltiptext'>Important traits for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;'a mut </a>R</span></div><div class="content hidden"><h3 class="important">Important traits for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;'a mut </a>R</h3><code class="content"><span class="where fmt-newline">impl&lt;'a, R&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html" title="trait std::io::Read">Read</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;'a mut </a>R <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;R: <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html" title="trait std::io::Read">Read</a> + ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,&nbsp;</span></span><span class="where fmt-newline">impl&lt;'a, W&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Write.html" title="trait std::io::Write">Write</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;'a mut </a>W <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;W: <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Write.html" title="trait std::io::Write">Write</a> + ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,&nbsp;</span></span><span class="where fmt-newline">impl&lt;'a, I&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html" title="trait core::iter::iterator::Iterator">Iterator</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;'a mut </a>I <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;I: <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html" title="trait core::iter::iterator::Iterator">Iterator</a> + ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,&nbsp;</span></span><span class="where fmt-newline"> type <a href='https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item' class="type">Item</a> = &lt;I as <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html" title="trait core::iter::iterator::Iterator">Iterator</a>&gt;::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>;</span></code></div></div><span id='by_ref.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.by_ref' class='fnname'>by_ref</a>(&amp;mut self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut </a>Self</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/io/mod.rs.html#752' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Creates a &quot;by reference&quot; adaptor for this instance of <code>Read</code>. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.by_ref">Read more</a></p>
</div><h4 id='method.bytes' class="method"><div class="important-traits"><div class='tooltip'>ⓘ<span class='tooltiptext'>Important traits for <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/struct.Bytes.html" title="struct std::io::Bytes">Bytes</a>&lt;R&gt;</span></div><div class="content hidden"><h3 class="important">Important traits for <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/struct.Bytes.html" title="struct std::io::Bytes">Bytes</a>&lt;R&gt;</h3><code class="content"><span class="where fmt-newline">impl&lt;R&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html" title="trait core::iter::iterator::Iterator">Iterator</a> for <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/struct.Bytes.html" title="struct std::io::Bytes">Bytes</a>&lt;R&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;R: <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html" title="trait std::io::Read">Read</a>,&nbsp;</span></span><span class="where fmt-newline"> type <a href='https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item' class="type">Item</a> = <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>, <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/error/struct.Error.html" title="struct std::io::error::Error">Error</a>&gt;;</span></code></div></div><span id='bytes.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.bytes' class='fnname'>bytes</a>(self) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/struct.Bytes.html" title="struct std::io::Bytes">Bytes</a>&lt;Self&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/io/mod.rs.html#789-791' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Transforms this <code>Read</code> instance to an [<code>Iterator</code>] over its bytes. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.bytes">Read more</a></p>
</div><h4 id='method.chars' class="method"><div class="important-traits"><div class='tooltip'>ⓘ<span class='tooltiptext'>Important traits for <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/struct.Chars.html" title="struct std::io::Chars">Chars</a>&lt;R&gt;</span></div><div class="content hidden"><h3 class="important">Important traits for <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/struct.Chars.html" title="struct std::io::Chars">Chars</a>&lt;R&gt;</h3><code class="content"><span class="where fmt-newline">impl&lt;R&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html" title="trait core::iter::iterator::Iterator">Iterator</a> for <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/struct.Chars.html" title="struct std::io::Chars">Chars</a>&lt;R&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;R: <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html" title="trait std::io::Read">Read</a>,&nbsp;</span></span><span class="where fmt-newline"> type <a href='https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item' class="type">Item</a> = <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.char.html">char</a>, <a class="enum" href="https://doc.rust-lang.org/nightly/std/io/enum.CharsError.html" title="enum std::io::CharsError">CharsError</a>&gt;;</span></code></div></div><span id='chars.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.chars' class='fnname'>chars</a>(self) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/struct.Chars.html" title="struct std::io::Chars">Chars</a>&lt;Self&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/io/mod.rs.html#833-835' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='stability'><div class='stab unstable'><details><summary><span class=microscope>🔬</span> This is a nightly-only experimental API. (<code>io</code>)</summary><p>the semantics of a partial read/write of where errors happen is currently unclear and may change</p>
</details></div></div><div class='docblock'><p>Transforms this <code>Read</code> instance to an [<code>Iterator</code>] over [<code>char</code>]s. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.chars">Read more</a></p>
</div><h4 id='method.chain' class="method"><div class="important-traits"><div class='tooltip'>ⓘ<span class='tooltiptext'>Important traits for <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/struct.Chain.html" title="struct std::io::Chain">Chain</a>&lt;T, U&gt;</span></div><div class="content hidden"><h3 class="important">Important traits for <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/struct.Chain.html" title="struct std::io::Chain">Chain</a>&lt;T, U&gt;</h3><code class="content"><span class="where fmt-newline">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html" title="trait std::io::Read">Read</a> for <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/struct.Chain.html" title="struct std::io::Chain">Chain</a>&lt;T, U&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html" title="trait std::io::Read">Read</a>,<br>&nbsp;&nbsp;&nbsp;&nbsp;U: <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html" title="trait std::io::Read">Read</a>,&nbsp;</span></span></code></div></div><span id='chain.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.chain' class='fnname'>chain</a>&lt;R&gt;(self, next: R) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/struct.Chain.html" title="struct std::io::Chain">Chain</a>&lt;Self, R&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;R: <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html" title="trait std::io::Read">Read</a>,&nbsp;</span></code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/io/mod.rs.html#868-870' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Creates an adaptor which will chain this stream with another. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.chain">Read more</a></p>
</div><h4 id='method.take' class="method"><div class="important-traits"><div class='tooltip'>ⓘ<span class='tooltiptext'>Important traits for <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/struct.Take.html" title="struct std::io::Take">Take</a>&lt;T&gt;</span></div><div class="content hidden"><h3 class="important">Important traits for <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/struct.Take.html" title="struct std::io::Take">Take</a>&lt;T&gt;</h3><code class="content"><span class="where fmt-newline">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html" title="trait std::io::Read">Read</a> for <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/struct.Take.html" title="struct std::io::Take">Take</a>&lt;T&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html" title="trait std::io::Read">Read</a>,&nbsp;</span></span></code></div></div><span id='take.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.take' class='fnname'>take</a>(self, limit: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u64.html">u64</a>) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/struct.Take.html" title="struct std::io::Take">Take</a>&lt;Self&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/io/mod.rs.html#904-906' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Creates an adaptor which will read at most <code>limit</code> bytes from it. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html#method.take">Read more</a></p>
</div></div><h3 id='impl-Write' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Write.html" title="trait std::io::Write">Write</a> for <a class="struct" href="../tempfile/struct.NamedTempFile.html" title="struct tempfile::NamedTempFile">NamedTempFile</a></code><a href='#impl-Write' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tempfile/named.rs.html#183-191' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.write' class="method"><span id='write.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Write.html#tymethod.write' class='fnname'>write</a>(&amp;mut self, buf: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tempfile/named.rs.html#184-186' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Write a buffer into this object, returning how many bytes were written. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Write.html#tymethod.write">Read more</a></p>
</div><h4 id='method.flush' class="method"><span id='flush.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Write.html#tymethod.flush' class='fnname'>flush</a>(&amp;mut self) -&gt; <a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tempfile/named.rs.html#188-190' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Flush this output stream, ensuring that all intermediately buffered contents reach their destination. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Write.html#tymethod.flush">Read more</a></p>
</div><h4 id='method.write_all' class="method"><span id='write_all.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Write.html#method.write_all' class='fnname'>write_all</a>(&amp;mut self, buf: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&amp;[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/error/struct.Error.html" title="struct std::io::error::Error">Error</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/io/mod.rs.html#1096-1107' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Attempts to write an entire buffer into this write. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Write.html#method.write_all">Read more</a></p>
</div><h4 id='method.write_fmt' class="method"><span id='write_fmt.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Write.html#method.write_fmt' class='fnname'>write_fmt</a>(&amp;mut self, fmt: <a class="struct" href="https://doc.rust-lang.org/nightly/core/fmt/struct.Arguments.html" title="struct core::fmt::Arguments">Arguments</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="struct" href="https://doc.rust-lang.org/nightly/std/io/error/struct.Error.html" title="struct std::io::error::Error">Error</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/io/mod.rs.html#1148-1180' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Writes a formatted string into this writer, returning any error encountered. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Write.html#method.write_fmt">Read more</a></p>
</div><h4 id='method.by_ref-1' class="method"><div class="important-traits"><div class='tooltip'>ⓘ<span class='tooltiptext'>Important traits for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;'a mut </a>R</span></div><div class="content hidden"><h3 class="important">Important traits for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;'a mut </a>R</h3><code class="content"><span class="where fmt-newline">impl&lt;'a, R&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html" title="trait std::io::Read">Read</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;'a mut </a>R <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;R: <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html" title="trait std::io::Read">Read</a> + ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,&nbsp;</span></span><span class="where fmt-newline">impl&lt;'a, W&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Write.html" title="trait std::io::Write">Write</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;'a mut </a>W <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;W: <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Write.html" title="trait std::io::Write">Write</a> + ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,&nbsp;</span></span><span class="where fmt-newline">impl&lt;'a, I&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html" title="trait core::iter::iterator::Iterator">Iterator</a> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;'a mut </a>I <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;I: <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html" title="trait core::iter::iterator::Iterator">Iterator</a> + ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,&nbsp;</span></span><span class="where fmt-newline"> type <a href='https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item' class="type">Item</a> = &lt;I as <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html" title="trait core::iter::iterator::Iterator">Iterator</a>&gt;::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>;</span></code></div></div><span id='by_ref.v-1' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Write.html#method.by_ref' class='fnname'>by_ref</a>(&amp;mut self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut </a>Self</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/io/mod.rs.html#1204' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Creates a &quot;by reference&quot; adaptor for this instance of <code>Write</code>. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Write.html#method.by_ref">Read more</a></p>
</div></div><h3 id='impl-Seek' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Seek.html" title="trait std::io::Seek">Seek</a> for <a class="struct" href="../tempfile/struct.NamedTempFile.html" title="struct tempfile::NamedTempFile">NamedTempFile</a></code><a href='#impl-Seek' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tempfile/named.rs.html#193-197' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.seek' class="method"><span id='seek.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/std/io/trait.Seek.html#tymethod.seek' class='fnname'>seek</a>(&amp;mut self, pos: <a class="enum" href="https://doc.rust-lang.org/nightly/std/io/enum.SeekFrom.html" title="enum std::io::SeekFrom">SeekFrom</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u64.html">u64</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tempfile/named.rs.html#194-196' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Seek to an offset, in bytes, in a stream. <a href="https://doc.rust-lang.org/nightly/std/io/trait.Seek.html#tymethod.seek">Read more</a></p>
</div></div><h3 id='impl-AsRawFd' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/std/sys/unix/ext/io/trait.AsRawFd.html" title="trait std::sys::unix::ext::io::AsRawFd">AsRawFd</a> for <a class="struct" href="../tempfile/struct.NamedTempFile.html" title="struct tempfile::NamedTempFile">NamedTempFile</a></code><a href='#impl-AsRawFd' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tempfile/named.rs.html#200-205' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.as_raw_fd' class="method"><span id='as_raw_fd.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/std/sys/unix/ext/io/trait.AsRawFd.html#tymethod.as_raw_fd' class='fnname'>as_raw_fd</a>(&amp;self) -&gt; <a class="type" href="https://doc.rust-lang.org/nightly/std/sys/unix/ext/io/type.RawFd.html" title="type std::sys::unix::ext::io::RawFd">RawFd</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/tempfile/named.rs.html#202-204' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Extracts the raw file descriptor. <a href="https://doc.rust-lang.org/nightly/std/sys/unix/ext/io/trait.AsRawFd.html#tymethod.as_raw_fd">Read more</a></p>
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<h3 id='impl-Send' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="../tempfile/struct.NamedTempFile.html" title="struct tempfile::NamedTempFile">NamedTempFile</a></code><a href='#impl-Send' class='anchor'></a></span></td><td><span class='out-of-band'></span></td></tr></tbody></table></h3><div class='impl-items'></div><h3 id='impl-Sync' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="../tempfile/struct.NamedTempFile.html" title="struct tempfile::NamedTempFile">NamedTempFile</a></code><a href='#impl-Sync' class='anchor'></a></span></td><td><span class='out-of-band'></span></td></tr></tbody></table></h3><div class='impl-items'></div></div></section>
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