| // Copyright (C) 2017-2018 Baidu, Inc. All Rights Reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions |
| // are met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above copyright |
| // notice, this list of conditions and the following disclaimer in |
| // the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Baidu, Inc., nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| use untrusted::fs; |
| use io; |
| use path::Path; |
| use path::PathBuf; |
| |
| pub trait PathEx { |
| fn metadata(&self) -> io::Result<fs::Metadata>; |
| fn symlink_metadata(&self) -> io::Result<fs::Metadata>; |
| fn canonicalize(&self) -> io::Result<PathBuf>; |
| fn read_link(&self) -> io::Result<PathBuf>; |
| fn exists(&self) -> bool; |
| fn is_file(&self) -> bool; |
| fn is_dir(&self) -> bool; |
| } |
| |
| impl PathEx for Path { |
| /// Queries the file system to get information about a file, directory, etc. |
| /// |
| /// This function will traverse symbolic links to query information about the |
| /// destination file. |
| /// |
| /// This is an alias to [`fs::metadata`]. |
| /// |
| /// [`fs::metadata`]: ../fs/fn.metadata.html |
| /// |
| fn metadata(&self) -> io::Result<fs::Metadata> { |
| fs::metadata(self) |
| } |
| |
| /// Queries the metadata about a file without following symlinks. |
| /// |
| /// This is an alias to [`fs::symlink_metadata`]. |
| /// |
| /// [`fs::symlink_metadata`]: ../fs/fn.symlink_metadata.html |
| /// |
| fn symlink_metadata(&self) -> io::Result<fs::Metadata> { |
| fs::symlink_metadata(self) |
| } |
| |
| /// Returns the canonical form of the path with all intermediate components |
| /// normalized and symbolic links resolved. |
| /// |
| /// This is an alias to [`fs::canonicalize`]. |
| /// |
| /// [`fs::canonicalize`]: ../fs/fn.canonicalize.html |
| /// |
| fn canonicalize(&self) -> io::Result<PathBuf> { |
| fs::canonicalize(self) |
| } |
| |
| /// Reads a symbolic link, returning the file that the link points to. |
| /// |
| /// This is an alias to [`fs::read_link`]. |
| /// |
| /// [`fs::read_link`]: ../fs/fn.read_link.html |
| /// |
| fn read_link(&self) -> io::Result<PathBuf> { |
| fs::read_link(self) |
| } |
| |
| /// Returns whether the path points at an existing entity. |
| /// |
| /// This function will traverse symbolic links to query information about the |
| /// destination file. In case of broken symbolic links this will return `false`. |
| /// |
| /// If you cannot access the directory containing the file, e.g. because of a |
| /// permission error, this will return `false`. |
| /// |
| fn exists(&self) -> bool { |
| fs::metadata(self).is_ok() |
| } |
| |
| /// Returns whether the path exists on disk and is pointing at a regular file. |
| /// |
| /// This function will traverse symbolic links to query information about the |
| /// destination file. In case of broken symbolic links this will return `false`. |
| /// |
| /// If you cannot access the directory containing the file, e.g. because of a |
| /// permission error, this will return `false`. |
| /// |
| fn is_file(&self) -> bool { |
| fs::metadata(self).map(|m| m.is_file()).unwrap_or(false) |
| } |
| |
| /// Returns whether the path exists on disk and is pointing at a directory. |
| /// |
| /// This function will traverse symbolic links to query information about the |
| /// destination file. In case of broken symbolic links this will return `false`. |
| /// |
| /// If you cannot access the directory containing the file, e.g. because of a |
| /// permission error, this will return `false`. |
| /// |
| fn is_dir(&self) -> bool { |
| fs::metadata(self).map(|m| m.is_dir()).unwrap_or(false) |
| } |
| } |