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| </pre><pre class="rust "> |
| <span class="doccomment">//! FFI for statvfs functions</span> |
| <span class="doccomment">//!</span> |
| <span class="doccomment">//! See the `vfs::Statvfs` struct for some rusty wrappers</span> |
| |
| <span class="kw">use</span> {<span class="ident">Errno</span>, <span class="prelude-ty">Result</span>, <span class="ident">NixPath</span>}; |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">os</span>::<span class="ident">unix</span>::<span class="ident">io</span>::<span class="ident">AsRawFd</span>; |
| |
| <span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">vfs</span> { |
| <span class="doccomment">//! Structs related to the `statvfs` and `fstatvfs` functions</span> |
| <span class="doccomment">//!</span> |
| <span class="doccomment">//! The `Statvfs` struct has some wrappers methods around the `statvfs` and</span> |
| <span class="doccomment">//! `fstatvfs` calls.</span> |
| |
| <span class="kw">use</span> <span class="ident">libc</span>::{<span class="ident">c_ulong</span>,<span class="ident">c_int</span>}; |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">os</span>::<span class="ident">unix</span>::<span class="ident">io</span>::<span class="ident">AsRawFd</span>; |
| <span class="kw">use</span> {<span class="prelude-ty">Result</span>, <span class="ident">NixPath</span>}; |
| |
| <span class="kw">use</span> <span class="kw">super</span>::{<span class="ident">statvfs</span>, <span class="ident">fstatvfs</span>}; |
| |
| <span class="macro">bitflags</span><span class="macro">!</span>( |
| <span class="doccomment">/// Mount Flags</span> |
| <span class="attribute">#[<span class="ident">repr</span>(<span class="ident">C</span>)]</span> |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Default</span>)]</span> |
| <span class="kw">pub</span> <span class="ident">flags</span> <span class="ident">FsFlags</span>: <span class="ident">c_ulong</span> { |
| <span class="doccomment">/// Read Only</span> |
| <span class="kw">const</span> <span class="ident">RDONLY</span> <span class="op">=</span> <span class="number">1</span>, |
| <span class="doccomment">/// Do not allow the set-uid bits to have an effect</span> |
| <span class="kw">const</span> <span class="ident">NOSUID</span> <span class="op">=</span> <span class="number">2</span>, |
| <span class="doccomment">/// Do not interpret character or block-special devices</span> |
| <span class="kw">const</span> <span class="ident">NODEV</span> <span class="op">=</span> <span class="number">4</span>, |
| <span class="doccomment">/// Do not allow execution of binaries on the filesystem</span> |
| <span class="kw">const</span> <span class="ident">NOEXEC</span> <span class="op">=</span> <span class="number">8</span>, |
| <span class="doccomment">/// All IO should be done synchronously</span> |
| <span class="kw">const</span> <span class="ident">SYNCHRONOUS</span> <span class="op">=</span> <span class="number">16</span>, |
| <span class="doccomment">/// Allow mandatory locks on the filesystem</span> |
| <span class="kw">const</span> <span class="ident">MANDLOCK</span> <span class="op">=</span> <span class="number">64</span>, |
| <span class="kw">const</span> <span class="ident">WRITE</span> <span class="op">=</span> <span class="number">128</span>, |
| <span class="kw">const</span> <span class="ident">APPEND</span> <span class="op">=</span> <span class="number">256</span>, |
| <span class="kw">const</span> <span class="ident">IMMUTABLE</span> <span class="op">=</span> <span class="number">512</span>, |
| <span class="doccomment">/// Do not update access times on files</span> |
| <span class="kw">const</span> <span class="ident">NOATIME</span> <span class="op">=</span> <span class="number">1024</span>, |
| <span class="doccomment">/// Do not update access times on files</span> |
| <span class="kw">const</span> <span class="ident">NODIRATIME</span> <span class="op">=</span> <span class="number">2048</span>, |
| <span class="doccomment">/// Update access time relative to modify/change time</span> |
| <span class="kw">const</span> <span class="ident">RELATIME</span> <span class="op">=</span> <span class="number">4096</span>, |
| } |
| ); |
| |
| <span class="doccomment">/// The posix statvfs struct</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// http://linux.die.net/man/2/statvfs</span> |
| <span class="attribute">#[<span class="ident">repr</span>(<span class="ident">C</span>)]</span> |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>,<span class="ident">Copy</span>,<span class="ident">Clone</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Statvfs</span> { |
| <span class="doccomment">/// Filesystem block size. This is the value that will lead to</span> |
| <span class="doccomment">/// most efficient use of the filesystem</span> |
| <span class="kw">pub</span> <span class="ident">f_bsize</span>: <span class="ident">c_ulong</span>, |
| <span class="doccomment">/// Fragment Size -- actual minimum unit of allocation on this</span> |
| <span class="doccomment">/// filesystem</span> |
| <span class="kw">pub</span> <span class="ident">f_frsize</span>: <span class="ident">c_ulong</span>, |
| <span class="doccomment">/// Total number of blocks on the filesystem</span> |
| <span class="kw">pub</span> <span class="ident">f_blocks</span>: <span class="ident">u64</span>, |
| <span class="doccomment">/// Number of unused blocks on the filesystem, including those</span> |
| <span class="doccomment">/// reserved for root</span> |
| <span class="kw">pub</span> <span class="ident">f_bfree</span>: <span class="ident">u64</span>, |
| <span class="doccomment">/// Number of blocks available to non-root users</span> |
| <span class="kw">pub</span> <span class="ident">f_bavail</span>: <span class="ident">u64</span>, |
| <span class="doccomment">/// Total number of inodes available on the filesystem</span> |
| <span class="kw">pub</span> <span class="ident">f_files</span>: <span class="ident">u64</span>, |
| <span class="doccomment">/// Number of inodes available on the filesystem</span> |
| <span class="kw">pub</span> <span class="ident">f_ffree</span>: <span class="ident">u64</span>, |
| <span class="doccomment">/// Number of inodes available to non-root users</span> |
| <span class="kw">pub</span> <span class="ident">f_favail</span>: <span class="ident">u64</span>, |
| <span class="doccomment">/// File System ID</span> |
| <span class="kw">pub</span> <span class="ident">f_fsid</span>: <span class="ident">c_ulong</span>, |
| <span class="doccomment">/// Mount Flags</span> |
| <span class="kw">pub</span> <span class="ident">f_flag</span>: <span class="ident">FsFlags</span>, |
| <span class="doccomment">/// Maximum filename length</span> |
| <span class="kw">pub</span> <span class="ident">f_namemax</span>: <span class="ident">c_ulong</span>, |
| <span class="doccomment">/// Reserved extra space, OS-dependent</span> |
| <span class="ident">f_spare</span>: [<span class="ident">c_int</span>; <span class="number">6</span>], |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Statvfs</span> { |
| <span class="doccomment">/// Create a new `Statvfs` object and fill it with information about</span> |
| <span class="doccomment">/// the mount that contains `path`</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">for_path</span><span class="op"><</span><span class="ident">P</span>: <span class="question-mark">?</span><span class="ident">Sized</span> <span class="op">+</span> <span class="ident">NixPath</span><span class="op">></span>(<span class="ident">path</span>: <span class="kw-2">&</span><span class="ident">P</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">Statvfs</span><span class="op">></span> { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">stat</span> <span class="op">=</span> <span class="ident">Statvfs</span>::<span class="ident">default</span>(); |
| <span class="kw">let</span> <span class="ident">res</span> <span class="op">=</span> <span class="ident">statvfs</span>(<span class="ident">path</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">stat</span>); |
| <span class="ident">res</span>.<span class="ident">map</span>(<span class="op">|</span>_<span class="op">|</span> <span class="ident">stat</span>) |
| } |
| |
| <span class="doccomment">/// Replace information in this struct with information about `path`</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">update_with_path</span><span class="op"><</span><span class="ident">P</span>: <span class="question-mark">?</span><span class="ident">Sized</span> <span class="op">+</span> <span class="ident">NixPath</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">path</span>: <span class="kw-2">&</span><span class="ident">P</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { |
| <span class="ident">statvfs</span>(<span class="ident">path</span>, <span class="self">self</span>) |
| } |
| |
| <span class="doccomment">/// Create a new `Statvfs` object and fill it with information from fd</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">for_fd</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">AsRawFd</span><span class="op">></span>(<span class="ident">fd</span>: <span class="kw-2">&</span><span class="ident">T</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">Statvfs</span><span class="op">></span> { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">stat</span> <span class="op">=</span> <span class="ident">Statvfs</span>::<span class="ident">default</span>(); |
| <span class="kw">let</span> <span class="ident">res</span> <span class="op">=</span> <span class="ident">fstatvfs</span>(<span class="ident">fd</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">stat</span>); |
| <span class="ident">res</span>.<span class="ident">map</span>(<span class="op">|</span>_<span class="op">|</span> <span class="ident">stat</span>) |
| } |
| |
| <span class="doccomment">/// Replace information in this struct with information about `fd`</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">update_with_fd</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">AsRawFd</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">fd</span>: <span class="kw-2">&</span><span class="ident">T</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { |
| <span class="ident">fstatvfs</span>(<span class="ident">fd</span>, <span class="self">self</span>) |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Default</span> <span class="kw">for</span> <span class="ident">Statvfs</span> { |
| <span class="doccomment">/// Create a statvfs object initialized to all zeros</span> |
| <span class="kw">fn</span> <span class="ident">default</span>() <span class="op">-></span> <span class="self">Self</span> { |
| <span class="ident">Statvfs</span> { |
| <span class="ident">f_bsize</span>: <span class="number">0</span>, |
| <span class="ident">f_frsize</span>: <span class="number">0</span>, |
| <span class="ident">f_blocks</span>: <span class="number">0</span>, |
| <span class="ident">f_bfree</span>: <span class="number">0</span>, |
| <span class="ident">f_bavail</span>: <span class="number">0</span>, |
| <span class="ident">f_files</span>: <span class="number">0</span>, |
| <span class="ident">f_ffree</span>: <span class="number">0</span>, |
| <span class="ident">f_favail</span>: <span class="number">0</span>, |
| <span class="ident">f_fsid</span>: <span class="number">0</span>, |
| <span class="ident">f_flag</span>: <span class="ident">FsFlags</span>::<span class="ident">default</span>(), |
| <span class="ident">f_namemax</span>: <span class="number">0</span>, |
| <span class="ident">f_spare</span>: [<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>], |
| } |
| } |
| } |
| } |
| |
| <span class="kw">mod</span> <span class="ident">ffi</span> { |
| <span class="kw">use</span> <span class="ident">libc</span>::{<span class="ident">c_char</span>, <span class="ident">c_int</span>}; |
| <span class="kw">use</span> <span class="ident">sys</span>::<span class="ident">statvfs</span>::<span class="ident">vfs</span>; |
| |
| <span class="kw">extern</span> { |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">statvfs</span>(<span class="ident">path</span>: <span class="op">*</span> <span class="kw">const</span> <span class="ident">c_char</span>, <span class="ident">buf</span>: <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">vfs</span>::<span class="ident">Statvfs</span>) <span class="op">-></span> <span class="ident">c_int</span>; |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">fstatvfs</span>(<span class="ident">fd</span>: <span class="ident">c_int</span>, <span class="ident">buf</span>: <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">vfs</span>::<span class="ident">Statvfs</span>) <span class="op">-></span> <span class="ident">c_int</span>; |
| } |
| } |
| |
| <span class="doccomment">/// Fill an existing `Statvfs` object with information about the `path`</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">statvfs</span><span class="op"><</span><span class="ident">P</span>: <span class="question-mark">?</span><span class="ident">Sized</span> <span class="op">+</span> <span class="ident">NixPath</span><span class="op">></span>(<span class="ident">path</span>: <span class="kw-2">&</span><span class="ident">P</span>, <span class="ident">stat</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">vfs</span>::<span class="ident">Statvfs</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { |
| <span class="kw">unsafe</span> { |
| <span class="ident">Errno</span>::<span class="ident">clear</span>(); |
| <span class="kw">let</span> <span class="ident">res</span> <span class="op">=</span> <span class="macro">try</span><span class="macro">!</span>( |
| <span class="ident">path</span>.<span class="ident">with_nix_path</span>(<span class="op">|</span><span class="ident">path</span><span class="op">|</span> <span class="ident">ffi</span>::<span class="ident">statvfs</span>(<span class="ident">path</span>.<span class="ident">as_ptr</span>(), <span class="ident">stat</span>)) |
| ); |
| |
| <span class="ident">Errno</span>::<span class="ident">result</span>(<span class="ident">res</span>).<span class="ident">map</span>(<span class="ident">drop</span>) |
| } |
| } |
| |
| <span class="doccomment">/// Fill an existing `Statvfs` object with information about `fd`</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">fstatvfs</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">AsRawFd</span><span class="op">></span>(<span class="ident">fd</span>: <span class="kw-2">&</span><span class="ident">T</span>, <span class="ident">stat</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">vfs</span>::<span class="ident">Statvfs</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { |
| <span class="kw">unsafe</span> { |
| <span class="ident">Errno</span>::<span class="ident">clear</span>(); |
| <span class="ident">Errno</span>::<span class="ident">result</span>(<span class="ident">ffi</span>::<span class="ident">fstatvfs</span>(<span class="ident">fd</span>.<span class="ident">as_raw_fd</span>(), <span class="ident">stat</span>)).<span class="ident">map</span>(<span class="ident">drop</span>) |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">test</span>)]</span> |
| <span class="kw">mod</span> <span class="ident">test</span> { |
| <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">sys</span>::<span class="ident">statvfs</span>::<span class="kw-2">*</span>; |
| |
| <span class="attribute">#[<span class="ident">test</span>]</span> |
| <span class="kw">fn</span> <span class="ident">statvfs_call</span>() { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">stat</span> <span class="op">=</span> <span class="ident">vfs</span>::<span class="ident">Statvfs</span>::<span class="ident">default</span>(); |
| <span class="ident">statvfs</span>(<span class="string">"/"</span>.<span class="ident">as_bytes</span>(), <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">stat</span>).<span class="ident">unwrap</span>() |
| } |
| |
| <span class="attribute">#[<span class="ident">test</span>]</span> |
| <span class="kw">fn</span> <span class="ident">fstatvfs_call</span>() { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">stat</span> <span class="op">=</span> <span class="ident">vfs</span>::<span class="ident">Statvfs</span>::<span class="ident">default</span>(); |
| <span class="kw">let</span> <span class="ident">root</span> <span class="op">=</span> <span class="ident">File</span>::<span class="ident">open</span>(<span class="string">"/"</span>).<span class="ident">unwrap</span>(); |
| <span class="ident">fstatvfs</span>(<span class="kw-2">&</span><span class="ident">root</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">stat</span>).<span class="ident">unwrap</span>() |
| } |
| } |
| </pre> |
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