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| <h1 class='fqn'><span class='in-band'>Function <a href='../index.html'>nix</a>::<wbr><a href='index.html'>unistd</a>::<wbr><a class="fn" href=''>gethostname</a></span><span class='out-of-band'><span id='render-detail'> |
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| <pre class='rust fn'>pub fn gethostname<'a>(buffer: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&'a 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>) -> <a class="type" href="../../nix/type.Result.html" title="type nix::Result">Result</a><&'a <a class="struct" href="https://doc.rust-lang.org/nightly/std/ffi/c_str/struct.CStr.html" title="struct std::ffi::c_str::CStr">CStr</a>></pre><div class='docblock'><p>Get the host name and store it in the provided buffer, returning a pointer |
| the CStr in that buffer on success (see |
| <a href="http://man7.org/linux/man-pages/man2/gethostname.2.html">gethostname(2)</a>).</p> |
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| <p>This function call attempts to get the host name for the running system and |
| store it in a provided buffer. The buffer will be populated with bytes up |
| to the length of the provided slice including a NUL terminating byte. If |
| the hostname is longer than the length provided, no error will be provided. |
| The posix specification does not specify whether implementations will |
| null-terminate in this case, but the nix implementation will ensure that the |
| buffer is null terminated in this case.</p> |
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| <pre class="rust rust-example-rendered"> |
| <span class="kw">use</span> <span class="ident">nix</span>::<span class="ident">unistd</span>; |
| |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span> <span class="op">=</span> [<span class="number">0u8</span>; <span class="number">64</span>]; |
| <span class="kw">let</span> <span class="ident">hostname_cstr</span> <span class="op">=</span> <span class="ident">unistd</span>::<span class="ident">gethostname</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">buf</span>).<span class="ident">expect</span>(<span class="string">"Failed getting hostname"</span>); |
| <span class="kw">let</span> <span class="ident">hostname</span> <span class="op">=</span> <span class="ident">hostname_cstr</span>.<span class="ident">to_str</span>().<span class="ident">expect</span>(<span class="string">"Hostname wasn't valid UTF-8"</span>); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"Hostname: {}"</span>, <span class="ident">hostname</span>);</pre> |
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