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<p class='location'><a href='../../index.html'>bitflags</a>::<wbr><a href='../index.html'>__core</a>::<wbr><a href='index.html'>fs</a></p><script>window.sidebarCurrent = {name: 'copy', ty: 'fn', relpath: ''};</script><script defer src="sidebar-items.js"></script>
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<h1 class='fqn'><span class='in-band'>Function <a href='../../index.html'>bitflags</a>::<wbr><a href='../index.html'>__core</a>::<wbr><a href='index.html'>fs</a>::<wbr><a class='fn' href=''>copy</a></span><span class='out-of-band'><span id='render-detail'>
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<pre class='rust fn'>pub fn copy<P, Q>(from: P, to: Q) -> <a class='enum' href='../../../bitflags/__core/result/enum.Result.html' title='bitflags::__core::result::Result'>Result</a><<a class='primitive' href='https://doc.rust-lang.org/nightly/bitflags/primitive.u64.html'>u64</a>, <a class='struct' href='../../../bitflags/__core/io/struct.Error.html' title='bitflags::__core::io::Error'>Error</a>> <span class='where'>where P: <a class='trait' href='../../../bitflags/__core/convert/trait.AsRef.html' title='bitflags::__core::convert::AsRef'>AsRef</a><<a class='struct' href='../../../bitflags/__core/path/struct.Path.html' title='bitflags::__core::path::Path'>Path</a>>, Q: <a class='trait' href='../../../bitflags/__core/convert/trait.AsRef.html' title='bitflags::__core::convert::AsRef'>AsRef</a><<a class='struct' href='../../../bitflags/__core/path/struct.Path.html' title='bitflags::__core::path::Path'>Path</a>></span></pre><span class="since">1.0.0</span><div class='docblock'><p>Copies the contents of one file to another. This function will also
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copy the permission bits of the original file to the destination file.</p>
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<p>This function will <strong>overwrite</strong> the contents of <code>to</code>.</p>
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<p>Note that if <code>from</code> and <code>to</code> both point to the same file, then the file
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will likely get truncated by this operation.</p>
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<p>On success, the total number of bytes copied is returned.</p>
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<h1 id='platform-specific-behavior' class='section-header'><a href='#platform-specific-behavior'>Platform-specific behavior</a></h1>
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<p>This function currently corresponds to the <code>open</code> function in Unix
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with <code>O_RDONLY</code> for <code>from</code> and <code>O_WRONLY</code>, <code>O_CREAT</code>, and <code>O_TRUNC</code> for <code>to</code>.
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<code>O_CLOEXEC</code> is set for returned file descriptors.
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On Windows, this function currently corresponds to <code>CopyFileEx</code>.
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Note that, this <a href="../io/index.html#platform-specific-behavior">may change in the future</a>.</p>
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<h1 id='errors' class='section-header'><a href='#errors'>Errors</a></h1>
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<p>This function will return an error in the following situations, but is not
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limited to just these cases:</p>
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<ul>
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<li>The <code>from</code> path is not a file.</li>
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<li>The <code>from</code> file does not exist.</li>
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<li>The current process does not have the permission rights to access
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<code>from</code> or write <code>to</code>.</li>
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</ul>
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<h1 id='examples' class='section-header'><a href='#examples'>Examples</a></h1>
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<pre class='rust rust-example-rendered'>
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<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>fs</span>;
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<span class='macro'>try</span><span class='macro'>!</span>(<span class='ident'>fs</span>::<span class='ident'>copy</span>(<span class='string'>"foo.txt"</span>, <span class='string'>"bar.txt"</span>)); <span class='comment'>// Copy foo.txt to bar.txt</span></pre>
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