/src/libstd/fs/mod.rs
Rust | 1563 lines | 983 code | 170 blank | 410 comment | 30 complexity | 1ba7921bf3552a51752b0639901de52b MD5 | raw file
Possible License(s): AGPL-1.0, BSD-2-Clause, 0BSD, Apache-2.0, MIT, LGPL-2.0
Large files files are truncated, but you can click here to view the full file
- // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
- // file at the top-level directory of this distribution and at
- // http://rust-lang.org/COPYRIGHT.
- //
- // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
- // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
- // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
- // option. This file may not be copied, modified, or distributed
- // except according to those terms.
- //! Filesystem manipulation operations
- //!
- //! This module contains basic methods to manipulate the contents of the local
- //! filesystem. All methods in this module represent cross-platform filesystem
- //! operations. Extra platform-specific functionality can be found in the
- //! extension traits of `std::os::$platform`.
- #![stable(feature = "rust1", since = "1.0.0")]
- use core::prelude::*;
- use io::{self, Error, ErrorKind, SeekFrom, Seek, Read, Write};
- use path::{AsPath, Path, PathBuf};
- use sys::fs2 as fs_imp;
- use sys_common::{AsInnerMut, FromInner, AsInner};
- use vec::Vec;
- #[allow(deprecated)]
- pub use self::tempdir::TempDir;
- mod tempdir;
- /// A reference to an open file on the filesystem.
- ///
- /// An instance of a `File` can be read and/or written depending on what options
- /// it was opened with. Files also implement `Seek` to alter the logical cursor
- /// that the file contains internally.
- ///
- /// # Examples
- ///
- /// ```no_run
- /// use std::io::prelude::*;
- /// use std::fs::File;
- ///
- /// # fn foo() -> std::io::Result<()> {
- /// let mut f = try!(File::create("foo.txt"));
- /// try!(f.write_all(b"Hello, world!"));
- ///
- /// let mut f = try!(File::open("foo.txt"));
- /// let mut s = String::new();
- /// try!(f.read_to_string(&mut s));
- /// assert_eq!(s, "Hello, world!");
- /// # Ok(())
- /// # }
- /// ```
- #[stable(feature = "rust1", since = "1.0.0")]
- pub struct File {
- inner: fs_imp::File,
- path: PathBuf,
- }
- /// Metadata information about a file.
- ///
- /// This structure is returned from the `metadata` function or method and
- /// represents known metadata about a file such as its permissions, size,
- /// modification times, etc.
- #[stable(feature = "rust1", since = "1.0.0")]
- pub struct Metadata(fs_imp::FileAttr);
- /// Iterator over the entries in a directory.
- ///
- /// This iterator is returned from the `read_dir` function of this module and
- /// will yield instances of `io::Result<DirEntry>`. Through a `DirEntry`
- /// information like the entry's path and possibly other metadata can be
- /// learned.
- #[stable(feature = "rust1", since = "1.0.0")]
- pub struct ReadDir(fs_imp::ReadDir);
- /// Entries returned by the `ReadDir` iterator.
- ///
- /// An instance of `DirEntry` represents an entry inside of a directory on the
- /// filesystem. Each entry can be inspected via methods to learn about the full
- /// path or possibly other metadata through per-platform extension traits.
- #[stable(feature = "rust1", since = "1.0.0")]
- pub struct DirEntry(fs_imp::DirEntry);
- /// An iterator that recursively walks over the contents of a directory.
- #[unstable(feature = "fs_walk",
- reason = "the precise semantics and defaults for a recursive walk \
- may change and this may end up accounting for files such \
- as symlinks differently")]
- pub struct WalkDir {
- cur: Option<ReadDir>,
- stack: Vec<io::Result<ReadDir>>,
- }
- /// Options and flags which can be used to configure how a file is opened.
- ///
- /// This builder exposes the ability to configure how a `File` is opened and
- /// what operations are permitted on the open file. The `File::open` and
- /// `File::create` methods are aliases for commonly used options using this
- /// builder.
- #[derive(Clone)]
- #[stable(feature = "rust1", since = "1.0.0")]
- pub struct OpenOptions(fs_imp::OpenOptions);
- /// Representation of the various permissions on a file.
- ///
- /// This module only currently provides one bit of information, `readonly`,
- /// which is exposed on all currently supported platforms. Unix-specific
- /// functionality, such as mode bits, is available through the
- /// `os::unix::PermissionsExt` trait.
- #[derive(Clone, PartialEq, Eq, Debug)]
- #[stable(feature = "rust1", since = "1.0.0")]
- pub struct Permissions(fs_imp::FilePermissions);
- impl File {
- /// Attempts to open a file in read-only mode.
- ///
- /// See the `OpenOptions::open` method for more details.
- ///
- /// # Errors
- ///
- /// This function will return an error if `path` does not already exist.
- /// Other errors may also be returned according to `OpenOptions::open`.
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn open<P: AsPath>(path: P) -> io::Result<File> {
- OpenOptions::new().read(true).open(path)
- }
- /// Open a file in write-only mode.
- ///
- /// This function will create a file if it does not exist,
- /// and will truncate it if it does.
- ///
- /// See the `OpenOptions::open` function for more details.
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn create<P: AsPath>(path: P) -> io::Result<File> {
- OpenOptions::new().write(true).create(true).truncate(true).open(path)
- }
- /// Returns the original path that was used to open this file.
- #[unstable(feature = "file_path",
- reason = "this abstraction is imposed by this library instead \
- of the underlying OS and may be removed")]
- pub fn path(&self) -> Option<&Path> {
- Some(&self.path)
- }
- /// Attempt to sync all OS-internal metadata to disk.
- ///
- /// This function will attempt to ensure that all in-core data reaches the
- /// filesystem before returning.
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn sync_all(&self) -> io::Result<()> {
- self.inner.fsync()
- }
- /// This function is similar to `sync_all`, except that it may not
- /// synchronize file metadata to the filesystem.
- ///
- /// 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.
- ///
- /// Note that some platforms may simply implement this in terms of
- /// `sync_all`.
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn sync_data(&self) -> io::Result<()> {
- self.inner.datasync()
- }
- /// Truncates or extends the underlying file, updating the size of
- /// this file to become `size`.
- ///
- /// If the `size` 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 `size` and have all of the intermediate data filled
- /// in with 0s.
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn set_len(&self, size: u64) -> io::Result<()> {
- self.inner.truncate(size)
- }
- /// Queries metadata about the underlying file.
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn metadata(&self) -> io::Result<Metadata> {
- self.inner.file_attr().map(Metadata)
- }
- }
- impl AsInner<fs_imp::File> for File {
- fn as_inner(&self) -> &fs_imp::File { &self.inner }
- }
- #[stable(feature = "rust1", since = "1.0.0")]
- impl Read for File {
- fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
- self.inner.read(buf)
- }
- }
- #[stable(feature = "rust1", since = "1.0.0")]
- impl Write for File {
- fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
- self.inner.write(buf)
- }
- fn flush(&mut self) -> io::Result<()> { self.inner.flush() }
- }
- #[stable(feature = "rust1", since = "1.0.0")]
- impl Seek for File {
- fn seek(&mut self, pos: SeekFrom) -> io::Result<u64> {
- self.inner.seek(pos)
- }
- }
- #[stable(feature = "rust1", since = "1.0.0")]
- impl<'a> Read for &'a File {
- fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
- self.inner.read(buf)
- }
- }
- #[stable(feature = "rust1", since = "1.0.0")]
- impl<'a> Write for &'a File {
- fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
- self.inner.write(buf)
- }
- fn flush(&mut self) -> io::Result<()> { self.inner.flush() }
- }
- #[stable(feature = "rust1", since = "1.0.0")]
- impl<'a> Seek for &'a File {
- fn seek(&mut self, pos: SeekFrom) -> io::Result<u64> {
- self.inner.seek(pos)
- }
- }
- impl OpenOptions {
- /// Creates a blank net set of options ready for configuration.
- ///
- /// All options are initially set to `false`.
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn new() -> OpenOptions {
- OpenOptions(fs_imp::OpenOptions::new())
- }
- /// Set the option for read access.
- ///
- /// This option, when true, will indicate that the file should be
- /// `read`-able if opened.
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn read(&mut self, read: bool) -> &mut OpenOptions {
- self.0.read(read); self
- }
- /// Set the option for write access.
- ///
- /// This option, when true, will indicate that the file should be
- /// `write`-able if opened.
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn write(&mut self, write: bool) -> &mut OpenOptions {
- self.0.write(write); self
- }
- /// Set the option for the append mode.
- ///
- /// This option, when true, means that writes will append to a file instead
- /// of overwriting previous contents.
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn append(&mut self, append: bool) -> &mut OpenOptions {
- self.0.append(append); self
- }
- /// Set the option for truncating a previous file.
- ///
- /// If a file is successfully opened with this option set it will truncate
- /// the file to 0 length if it already exists.
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn truncate(&mut self, truncate: bool) -> &mut OpenOptions {
- self.0.truncate(truncate); self
- }
- /// Set the option for creating a new file.
- ///
- /// This option indicates whether a new file will be created if the file
- /// does not yet already exist.
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn create(&mut self, create: bool) -> &mut OpenOptions {
- self.0.create(create); self
- }
- /// Open a file at `path` with the options specified by `self`.
- ///
- /// # Errors
- ///
- /// This function will return an error under a number of different
- /// circumstances, to include but not limited to:
- ///
- /// * Opening a file that does not exist with read access.
- /// * Attempting to open a file with access that the user lacks
- /// permissions for
- /// * Filesystem-level errors (full disk, etc)
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn open<P: AsPath>(&self, path: P) -> io::Result<File> {
- let path = path.as_path();
- let inner = try!(fs_imp::File::open(path, &self.0));
- Ok(File { path: path.to_path_buf(), inner: inner })
- }
- }
- impl AsInnerMut<fs_imp::OpenOptions> for OpenOptions {
- fn as_inner_mut(&mut self) -> &mut fs_imp::OpenOptions { &mut self.0 }
- }
- impl Metadata {
- /// Returns whether this metadata is for a directory.
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn is_dir(&self) -> bool { self.0.is_dir() }
- /// Returns whether this metadata is for a regular file.
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn is_file(&self) -> bool { self.0.is_file() }
- /// Returns the size of the file, in bytes, this metadata is for.
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn len(&self) -> u64 { self.0.size() }
- /// Returns the permissions of the file this metadata is for.
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn permissions(&self) -> Permissions {
- Permissions(self.0.perm())
- }
- /// Returns the most recent access time for a file.
- ///
- /// The return value is in milliseconds since the epoch.
- #[unstable(feature = "fs_time",
- reason = "the return type of u64 is not quite appropriate for \
- this method and may change if the standard library \
- gains a type to represent a moment in time")]
- pub fn accessed(&self) -> u64 { self.0.accessed() }
- /// Returns the most recent modification time for a file.
- ///
- /// The return value is in milliseconds since the epoch.
- #[unstable(feature = "fs_time",
- reason = "the return type of u64 is not quite appropriate for \
- this method and may change if the standard library \
- gains a type to represent a moment in time")]
- pub fn modified(&self) -> u64 { self.0.modified() }
- }
- impl Permissions {
- /// Returns whether these permissions describe a readonly file.
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn readonly(&self) -> bool { self.0.readonly() }
- /// Modify the readonly flag for this set of permissions.
- ///
- /// This operation does **not** modify the filesystem. To modify the
- /// filesystem use the `fs::set_permissions` function.
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn set_readonly(&mut self, readonly: bool) {
- self.0.set_readonly(readonly)
- }
- }
- impl FromInner<fs_imp::FilePermissions> for Permissions {
- fn from_inner(f: fs_imp::FilePermissions) -> Permissions {
- Permissions(f)
- }
- }
- impl AsInner<fs_imp::FilePermissions> for Permissions {
- fn as_inner(&self) -> &fs_imp::FilePermissions { &self.0 }
- }
- #[stable(feature = "rust1", since = "1.0.0")]
- impl Iterator for ReadDir {
- type Item = io::Result<DirEntry>;
- fn next(&mut self) -> Option<io::Result<DirEntry>> {
- self.0.next().map(|entry| entry.map(DirEntry))
- }
- }
- #[stable(feature = "rust1", since = "1.0.0")]
- impl DirEntry {
- /// Returns the full path to the file that this entry represents.
- ///
- /// The full path is created by joining the original path to `read_dir` or
- /// `walk_dir` with the filename of this entry.
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn path(&self) -> PathBuf { self.0.path() }
- }
- /// Remove a file from the underlying filesystem.
- ///
- /// # Examples
- ///
- /// ```rust,no_run
- /// use std::fs;
- ///
- /// fs::remove_file("/some/file/path.txt");
- /// ```
- ///
- /// Note that, just because an unlink call was successful, it is not
- /// guaranteed that a file is immediately deleted (e.g. depending on
- /// platform, other open file descriptors may prevent immediate removal).
- ///
- /// # Errors
- ///
- /// This function will return an error if `path` points to a directory, if the
- /// user lacks permissions to remove the file, or if some other filesystem-level
- /// error occurs.
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn remove_file<P: AsPath>(path: P) -> io::Result<()> {
- fs_imp::unlink(path.as_path())
- }
- /// Given a path, query the file system to get information about a file,
- /// directory, etc.
- ///
- /// This function will traverse soft links to query information about the
- /// destination file.
- ///
- /// # Examples
- ///
- /// ```rust,no_run
- /// # fn foo() -> std::io::Result<()> {
- /// use std::fs;
- ///
- /// let attr = try!(fs::metadata("/some/file/path.txt"));
- /// // inspect attr ...
- /// # Ok(())
- /// # }
- /// ```
- ///
- /// # Errors
- ///
- /// This function will return an error if the user lacks the requisite
- /// permissions to perform a `metadata` call on the given `path` or if there
- /// is no entry in the filesystem at the provided path.
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn metadata<P: AsPath>(path: P) -> io::Result<Metadata> {
- fs_imp::stat(path.as_path()).map(Metadata)
- }
- /// Rename a file or directory to a new name.
- ///
- /// # Examples
- ///
- /// ```rust,no_run
- /// use std::fs;
- ///
- /// fs::rename("foo", "bar");
- /// ```
- ///
- /// # Errors
- ///
- /// This function will return an error if the provided `from` doesn't exist, if
- /// the process lacks permissions to view the contents, if `from` and `to`
- /// reside on separate filesystems, or if some other intermittent I/O error
- /// occurs.
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn rename<P: AsPath, Q: AsPath>(from: P, to: Q) -> io::Result<()> {
- fs_imp::rename(from.as_path(), to.as_path())
- }
- /// Copies the contents of one file to another. This function will also
- /// copy the permission bits of the original file to the destination file.
- ///
- /// This function will **overwrite** the contents of `to`.
- ///
- /// Note that if `from` and `to` both point to the same file, then the file
- /// will likely get truncated by this operation.
- ///
- /// # Examples
- ///
- /// ```
- /// use std::fs;
- ///
- /// fs::copy("foo.txt", "bar.txt");
- /// ```
- ///
- /// # Errors
- ///
- /// This function will return an error in the following situations, but is not
- /// limited to just these cases:
- ///
- /// * The `from` path is not a file
- /// * The `from` file does not exist
- /// * The current process does not have the permission rights to access
- /// `from` or write `to`
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn copy<P: AsPath, Q: AsPath>(from: P, to: Q) -> io::Result<u64> {
- let from = from.as_path();
- let to = to.as_path();
- if !from.is_file() {
- return Err(Error::new(ErrorKind::MismatchedFileTypeForOperation,
- "the source path is not an existing file",
- None))
- }
- let mut reader = try!(File::open(from));
- let mut writer = try!(File::create(to));
- let perm = try!(reader.metadata()).permissions();
- let ret = try!(io::copy(&mut reader, &mut writer));
- try!(set_permissions(to, perm));
- Ok(ret)
- }
- /// Creates a new hard link on the filesystem.
- ///
- /// The `dst` path will be a link pointing to the `src` path. Note that systems
- /// often require these two paths to both be located on the same filesystem.
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn hard_link<P: AsPath, Q: AsPath>(src: P, dst: Q) -> io::Result<()> {
- fs_imp::link(src.as_path(), dst.as_path())
- }
- /// Creates a new soft link on the filesystem.
- ///
- /// The `dst` path will be a soft link pointing to the `src` path.
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn soft_link<P: AsPath, Q: AsPath>(src: P, dst: Q) -> io::Result<()> {
- fs_imp::symlink(src.as_path(), dst.as_path())
- }
- /// Reads a soft link, returning the file that the link points to.
- ///
- /// # Errors
- ///
- /// This function will return an error on failure. Failure conditions include
- /// reading a file that does not exist or reading a file that is not a soft
- /// link.
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn read_link<P: AsPath>(path: P) -> io::Result<PathBuf> {
- fs_imp::readlink(path.as_path())
- }
- /// Create a new, empty directory at the provided path
- ///
- /// # Examples
- ///
- /// ```
- /// use std::fs;
- ///
- /// fs::create_dir("/some/dir");
- /// ```
- ///
- /// # Errors
- ///
- /// This function will return an error if the user lacks permissions to make a
- /// new directory at the provided `path`, or if the directory already exists.
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn create_dir<P: AsPath>(path: P) -> io::Result<()> {
- fs_imp::mkdir(path.as_path())
- }
- /// Recursively create a directory and all of its parent components if they
- /// are missing.
- ///
- /// # Errors
- ///
- /// This function will fail if any directory in the path specified by `path`
- /// does not already exist and it could not be created otherwise. The specific
- /// error conditions for when a directory is being created (after it is
- /// determined to not exist) are outlined by `fs::create_dir`.
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn create_dir_all<P: AsPath>(path: P) -> io::Result<()> {
- let path = path.as_path();
- if path.is_dir() { return Ok(()) }
- if let Some(p) = path.parent() { try!(create_dir_all(p)) }
- create_dir(path)
- }
- /// Remove an existing, empty directory
- ///
- /// # Examples
- ///
- /// ```
- /// use std::fs;
- ///
- /// fs::remove_dir("/some/dir");
- /// ```
- ///
- /// # Errors
- ///
- /// This function will return an error if the user lacks permissions to remove
- /// the directory at the provided `path`, or if the directory isn't empty.
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn remove_dir<P: AsPath>(path: P) -> io::Result<()> {
- fs_imp::rmdir(path.as_path())
- }
- /// Removes a directory at this path, after removing all its contents. Use
- /// carefully!
- ///
- /// This function does **not** follow soft links and it will simply remove the
- /// soft link itself.
- ///
- /// # Errors
- ///
- /// See `file::remove_file` and `fs::remove_dir`
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn remove_dir_all<P: AsPath>(path: P) -> io::Result<()> {
- let path = path.as_path();
- for child in try!(read_dir(path)) {
- let child = try!(child).path();
- let stat = try!(lstat(&*child));
- if stat.is_dir() {
- try!(remove_dir_all(&*child));
- } else {
- try!(remove_file(&*child));
- }
- }
- return remove_dir(path);
- #[cfg(unix)]
- fn lstat(path: &Path) -> io::Result<fs_imp::FileAttr> { fs_imp::lstat(path) }
- #[cfg(windows)]
- fn lstat(path: &Path) -> io::Result<fs_imp::FileAttr> { fs_imp::stat(path) }
- }
- /// Returns an iterator over the entries within a directory.
- ///
- /// The iterator will yield instances of `io::Result<DirEntry>`. New errors may
- /// be encountered after an iterator is initially constructed.
- ///
- /// # Examples
- ///
- /// ```
- /// use std::io;
- /// use std::fs::{self, PathExt, DirEntry};
- /// use std::path::Path;
- ///
- /// // one possible implementation of fs::walk_dir only visiting files
- /// fn visit_dirs(dir: &Path, cb: &mut FnMut(DirEntry)) -> io::Result<()> {
- /// if dir.is_dir() {
- /// for entry in try!(fs::read_dir(dir)) {
- /// let entry = try!(entry);
- /// if entry.path().is_dir() {
- /// try!(visit_dirs(&entry.path(), cb));
- /// } else {
- /// cb(entry);
- /// }
- /// }
- /// }
- /// Ok(())
- /// }
- /// ```
- ///
- /// # Errors
- ///
- /// This function will return an error if the provided `path` doesn't exist, if
- /// the process lacks permissions to view the contents or if the `path` points
- /// at a non-directory file
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn read_dir<P: AsPath>(path: P) -> io::Result<ReadDir> {
- fs_imp::readdir(path.as_path()).map(ReadDir)
- }
- /// Returns an iterator that will recursively walk the directory structure
- /// rooted at `path`.
- ///
- /// The path given will not be iterated over, and this will perform iteration in
- /// some top-down order. The contents of unreadable subdirectories are ignored.
- ///
- /// The iterator will yield instances of `io::Result<DirEntry>`. New errors may
- /// be encountered after an iterator is initially constructed.
- #[unstable(feature = "fs_walk",
- reason = "the precise semantics and defaults for a recursive walk \
- may change and this may end up accounting for files such \
- as symlinks differently")]
- pub fn walk_dir<P: AsPath>(path: P) -> io::Result<WalkDir> {
- let start = try!(read_dir(path));
- Ok(WalkDir { cur: Some(start), stack: Vec::new() })
- }
- #[unstable(feature = "fs_walk")]
- impl Iterator for WalkDir {
- type Item = io::Result<DirEntry>;
- fn next(&mut self) -> Option<io::Result<DirEntry>> {
- loop {
- if let Some(ref mut cur) = self.cur {
- match cur.next() {
- Some(Err(e)) => return Some(Err(e)),
- Some(Ok(next)) => {
- let path = next.path();
- if path.is_dir() {
- self.stack.push(read_dir(&*path));
- }
- return Some(Ok(next))
- }
- None => {}
- }
- }
- self.cur = None;
- match self.stack.pop() {
- Some(Err(e)) => return Some(Err(e)),
- Some(Ok(next)) => self.cur = Some(next),
- None => return None,
- }
- }
- }
- }
- /// Utility methods for paths.
- #[unstable(feature = "path_ext",
- reason = "the precise set of methods exposed on this trait may \
- change and some methods may be removed")]
- pub trait PathExt {
- /// Get information on the file, directory, etc at this path.
- ///
- /// Consult the `fs::stat` documentation for more info.
- ///
- /// This call preserves identical runtime/error semantics with `file::stat`.
- fn metadata(&self) -> io::Result<Metadata>;
- /// Boolean value indicator whether the underlying file exists on the local
- /// filesystem. Returns false in exactly the cases where `fs::stat` fails.
- fn exists(&self) -> bool;
- /// Whether the underlying implementation (be it a file path, or something
- /// else) points at a "regular file" on the FS. Will return false for paths
- /// to non-existent locations or directories or other non-regular files
- /// (named pipes, etc). Follows links when making this determination.
- fn is_file(&self) -> bool;
- /// Whether the underlying implementation (be it a file path, or something
- /// else) is pointing at a directory in the underlying FS. Will return
- /// false for paths to non-existent locations or if the item is not a
- /// directory (eg files, named pipes, etc). Follows links when making this
- /// determination.
- fn is_dir(&self) -> bool;
- }
- impl PathExt for Path {
- fn metadata(&self) -> io::Result<Metadata> { metadata(self) }
- fn exists(&self) -> bool { metadata(self).is_ok() }
- fn is_file(&self) -> bool {
- metadata(self).map(|s| s.is_file()).unwrap_or(false)
- }
- fn is_dir(&self) -> bool {
- metadata(self).map(|s| s.is_dir()).unwrap_or(false)
- }
- }
- /// Changes the timestamps for a file's last modification and access time.
- ///
- /// The file at the path specified will have its last access time set to
- /// `atime` and its modification time set to `mtime`. The times specified should
- /// be in milliseconds.
- #[unstable(feature = "fs_time",
- reason = "the argument type of u64 is not quite appropriate for \
- this function and may change if the standard library \
- gains a type to represent a moment in time")]
- pub fn set_file_times<P: AsPath>(path: P, accessed: u64,
- modified: u64) -> io::Result<()> {
- fs_imp::utimes(path.as_path(), accessed, modified)
- }
- /// Changes the permissions found on a file or a directory.
- ///
- /// # Examples
- ///
- /// ```
- /// # fn foo() -> std::io::Result<()> {
- /// use std::fs;
- ///
- /// let mut perms = try!(fs::metadata("foo.txt")).permissions();
- /// perms.set_readonly(true);
- /// try!(fs::set_permissions("foo.txt", perms));
- /// # Ok(())
- /// # }
- /// ```
- ///
- /// # Errors
- ///
- /// This function will return an error if the provided `path` doesn't exist, if
- /// the process lacks permissions to change the attributes of the file, or if
- /// some other I/O error is encountered.
- #[unstable(feature = "fs",
- reason = "a more granual ability to set specific permissions may \
- be exposed on the Permissions structure itself and this \
- method may not always exist")]
- pub fn set_permissions<P: AsPath>(path: P, perm: Permissions) -> io::Result<()> {
- fs_imp::set_perm(path.as_path(), perm.0)
- }
- #[cfg(test)]
- mod tests {
- #![allow(deprecated)] //rand
- use prelude::v1::*;
- use io::prelude::*;
- use fs::{self, File, OpenOptions};
- use io::{ErrorKind, SeekFrom};
- use path::PathBuf;
- use path::Path as Path2;
- use os;
- use rand::{self, StdRng, Rng};
- use str;
- macro_rules! check { ($e:expr) => (
- match $e {
- Ok(t) => t,
- Err(e) => panic!("{} failed with: {}", stringify!($e), e),
- }
- ) }
- macro_rules! error { ($e:expr, $s:expr) => (
- match $e {
- Ok(_) => panic!("Unexpected success. Should've been: {:?}", $s),
- Err(ref err) => assert!(err.to_string().contains($s),
- format!("`{}` did not contain `{}`", err, $s))
- }
- ) }
- pub struct TempDir(PathBuf);
- impl TempDir {
- fn join(&self, path: &str) -> PathBuf {
- let TempDir(ref p) = *self;
- p.join(path)
- }
- fn path<'a>(&'a self) -> &'a Path2 {
- let TempDir(ref p) = *self;
- p
- }
- }
- impl Drop for TempDir {
- fn drop(&mut self) {
- // Gee, seeing how we're testing the fs module I sure hope that we
- // at least implement this correctly!
- let TempDir(ref p) = *self;
- check!(fs::remove_dir_all(p));
- }
- }
- pub fn tmpdir() -> TempDir {
- let s = os::tmpdir();
- let p = Path2::new(s.as_str().unwrap());
- let ret = p.join(&format!("rust-{}", rand::random::<u32>()));
- check!(fs::create_dir(&ret));
- TempDir(ret)
- }
- #[test]
- fn file_test_io_smoke_test() {
- let message = "it's alright. have a good time";
- let tmpdir = tmpdir();
- let filename = &tmpdir.join("file_rt_io_file_test.txt");
- {
- let mut write_stream = check!(File::create(filename));
- check!(write_stream.write(message.as_bytes()));
- }
- {
- let mut read_stream = check!(File::open(filename));
- let mut read_buf = [0; 1028];
- let read_str = match check!(read_stream.read(&mut read_buf)) {
- -1|0 => panic!("shouldn't happen"),
- n => str::from_utf8(&read_buf[..n]).unwrap().to_string()
- };
- assert_eq!(read_str, message);
- }
- check!(fs::remove_file(filename));
- }
- #[test]
- fn invalid_path_raises() {
- let tmpdir = tmpdir();
- let filename = &tmpdir.join("file_that_does_not_exist.txt");
- let result = File::open(filename);
- if cfg!(unix) {
- error!(result, "o such file or directory");
- }
- // error!(result, "couldn't open path as file");
- // error!(result, format!("path={}; mode=open; access=read", filename.display()));
- }
- #[test]
- fn file_test_iounlinking_invalid_path_should_raise_condition() {
- let tmpdir = tmpdir();
- let filename = &tmpdir.join("file_another_file_that_does_not_exist.txt");
- let result = fs::remove_file(filename);
- if cfg!(unix) {
- error!(result, "o such file or directory");
- }
- // error!(result, "couldn't unlink path");
- // error!(result, format!("path={}", filename.display()));
- }
- #[test]
- fn file_test_io_non_positional_read() {
- let message: &str = "ten-four";
- let mut read_mem = [0; 8];
- let tmpdir = tmpdir();
- let filename = &tmpdir.join("file_rt_io_file_test_positional.txt");
- {
- let mut rw_stream = check!(File::create(filename));
- check!(rw_stream.write(message.as_bytes()));
- }
- {
- let mut read_stream = check!(File::open(filename));
- {
- let read_buf = &mut read_mem[0..4];
- check!(read_stream.read(read_buf));
- }
- {
- let read_buf = &mut read_mem[4..8];
- check!(read_stream.read(read_buf));
- }
- }
- check!(fs::remove_file(filename));
- let read_str = str::from_utf8(&read_mem).unwrap();
- assert_eq!(read_str, message);
- }
- #[test]
- fn file_test_io_seek_and_tell_smoke_test() {
- let message = "ten-four";
- let mut read_mem = [0; 4];
- let set_cursor = 4 as u64;
- let mut tell_pos_pre_read;
- let mut tell_pos_post_read;
- let tmpdir = tmpdir();
- let filename = &tmpdir.join("file_rt_io_file_test_seeking.txt");
- {
- let mut rw_stream = check!(File::create(filename));
- check!(rw_stream.write(message.as_bytes()));
- }
- {
- let mut read_stream = check!(File::open(filename));
- check!(read_stream.seek(SeekFrom::Start(set_cursor)));
- tell_pos_pre_read = check!(read_stream.seek(SeekFrom::Current(0)));
- check!(read_stream.read(&mut read_mem));
- tell_pos_post_read = check!(read_stream.seek(SeekFrom::Current(0)));
- }
- check!(fs::remove_file(filename));
- let read_str = str::from_utf8(&read_mem).unwrap();
- assert_eq!(read_str, &message[4..8]);
- assert_eq!(tell_pos_pre_read, set_cursor);
- assert_eq!(tell_pos_post_read, message.len() as u64);
- }
- #[test]
- fn file_test_io_seek_and_write() {
- let initial_msg = "food-is-yummy";
- let overwrite_msg = "-the-bar!!";
- let final_msg = "foo-the-bar!!";
- let seek_idx = 3;
- let mut read_mem = [0; 13];
- let tmpdir = tmpdir();
- let filename = &tmpdir.join("file_rt_io_file_test_seek_and_write.txt");
- {
- let mut rw_stream = check!(File::create(filename));
- check!(rw_stream.write(initial_msg.as_bytes()));
- check!(rw_stream.seek(SeekFrom::Start(seek_idx)));
- check!(rw_stream.write(overwrite_msg.as_bytes()));
- }
- {
- let mut read_stream = check!(File::open(filename));
- check!(read_stream.read(&mut read_mem));
- }
- check!(fs::remove_file(filename));
- let read_str = str::from_utf8(&read_mem).unwrap();
- assert!(read_str == final_msg);
- }
- #[test]
- fn file_test_io_seek_shakedown() {
- // 01234567890123
- let initial_msg = "qwer-asdf-zxcv";
- let chunk_one: &str = "qwer";
- let chunk_two: &str = "asdf";
- let chunk_three: &str = "zxcv";
- let mut read_mem = [0; 4];
- let tmpdir = tmpdir();
- let filename = &tmpdir.join("file_rt_io_file_test_seek_shakedown.txt");
- {
- let mut rw_stream = check!(File::create(filename));
- check!(rw_stream.write(initial_msg.as_bytes()));
- }
- {
- let mut read_stream = check!(File::open(filename));
- check!(read_stream.seek(SeekFrom::End(-4)));
- check!(read_stream.read(&mut read_mem));
- assert_eq!(str::from_utf8(&read_mem).unwrap(), chunk_three);
- check!(read_stream.seek(SeekFrom::Current(-9)));
- check!(read_stream.read(&mut read_mem));
- assert_eq!(str::from_utf8(&read_mem).unwrap(), chunk_two);
- check!(read_stream.seek(SeekFrom::Start(0)));
- check!(read_stream.read(&mut read_mem));
- assert_eq!(str::from_utf8(&read_mem).unwrap(), chunk_one);
- }
- check!(fs::remove_file(filename));
- }
- #[test]
- fn file_test_stat_is_correct_on_is_file() {
- let tmpdir = tmpdir();
- let filename = &tmpdir.join("file_stat_correct_on_is_file.txt");
- {
- let mut opts = OpenOptions::new();
- let mut fs = check!(opts.read(true).write(true)
- .create(true).open(filename));
- let msg = "hw";
- fs.write(msg.as_bytes()).unwrap();
- let fstat_res = check!(fs.metadata());
- assert!(fstat_res.is_file());
- }
- let stat_res_fn = check!(fs::metadata(filename));
- assert!(stat_res_fn.is_file());
- let stat_res_meth = check!(filename.metadata());
- assert!(stat_res_meth.is_file());
- check!(fs::remove_file(filename));
- }
- #[test]
- fn file_test_stat_is_correct_on_is_dir() {
- let tmpdir = tmpdir();
- let filename = &tmpdir.join("file_stat_correct_on_is_dir");
- check!(fs::create_dir(filename));
- let stat_res_fn = check!(fs::metadata(filename));
- assert!(stat_res_fn.is_dir());
- let stat_res_meth = check!(filename.metadata());
- assert!(stat_res_meth.is_dir());
- check!(fs::remove_dir(filename));
- }
- #[test]
- fn file_test_fileinfo_false_when_checking_is_file_on_a_directory() {
- let tmpdir = tmpdir();
- let dir = &tmpdir.join("fileinfo_false_on_dir");
- check!(fs::create_dir(dir));
- assert!(dir.is_file() == false);
- check!(fs::remove_dir(dir));
- }
- #[test]
- fn file_test_fileinfo_check_exists_before_and_after_file_creation() {
- let tmpdir = tmpdir();
- let file = &tmpdir.join("fileinfo_check_exists_b_and_a.txt");
- check!(check!(File::create(file)).write(b"foo"));
- assert!(file.exists());
- check!(fs::remove_file(file));
- assert!(!file.exists());
- }
- #[test]
- fn file_test_directoryinfo_check_exists_before_and_after_mkdir() {
- let tmpdir = tmpdir();
- let dir = &tmpdir.join("before_and_after_dir");
- assert!(!dir.exists());
- check!(fs::create_dir(dir));
- assert!(dir.exists());
- assert!(dir.is_dir());
- check!(fs::remove_dir(dir));
- assert!(!dir.exists());
- }
- #[test]
- fn file_test_directoryinfo_readdir() {
- let tmpdir = tmpdir();
- let dir = &tmpdir.join("di_readdir");
- check!(fs::create_dir(dir));
- let prefix = "foo";
- for n in range(0, 3) {
- let f = dir.join(&format!("{}.txt", n));
- let mut w = check!(File::create(&f));
- let msg_str = format!("{}{}", prefix, n.to_string());
- let msg = msg_str.as_bytes();
- check!(w.write(msg));
- }
- let files = check!(fs::read_dir(dir));
- let mut mem = [0; 4];
- for f in files {
- let f = f.unwrap().path();
- {
- let n = f.file_stem().unwrap();
- check!(check!(File::open(&f)).read(&mut mem));
- let read_str = str::from_utf8(&mem).unwrap();
- let expected = format!("{}{}", prefix, n.to_str().unwrap());
- assert_eq!(expected, read_str);
- }
- check!(fs::remove_file(&f));
- }
- check!(fs::remove_dir(dir));
- }
- #[test]
- fn file_test_walk_dir() {
- let tmpdir = tmpdir();
- let dir = &tmpdir.join("walk_dir");
- check!(fs::create_dir(dir));
- let dir1 = &dir.join("01/02/03");
- check!(fs::create_dir_all(dir1));
- check!(File::create(&dir1.join("04")));
- let dir2 = &dir.join("11/12/13");
- check!(fs::create_dir_all(dir2));
- check!(File::create(&dir2.join("14")));
- let files = check!(fs::walk_dir(dir));
- let mut cur = [0; 2];
- for f in files {
- let f = f.unwrap().path();
- let stem = f.file_stem().unwrap().to_str().unwrap();
- let root = stem.as_bytes()[0] - b'0';
- let name = stem.as_bytes()[1] - b'0';
- assert!(cur[root as usize] < name);
- cur[root as usize] = name;
- }
- check!(fs::remove_dir_all(dir));
- }
- #[test]
- fn mkdir_path_already_exists_error() {
- let tmpdir = tmpdir();
- let dir = &tmpdir.join("mkdir_error_twice");
- check!(fs::create_dir(dir));
- let e = fs::create_dir(dir).err().unwrap();
- assert_eq!(e.kind(), ErrorKind::PathAlreadyExists);
- }
- #[test]
- fn recursive_mkdir() {
- let tmpdir = tmpdir();
- let dir = tmpdir.join("d1/d2");
- check!(fs::create_dir_all(&dir));
- assert!(dir.is_dir())
- }
- #[test]
- fn recursive_mkdir_failure() {
- let tmpdir = tmpdir();
- let dir = tmpdir.join("d1");
- let file = dir.join("f1");
- check!(fs::create_dir_all(&dir));
- check!(File::create(&file));
- let result = fs::create_dir_all(&file);
- assert!(result.is_err());
- // error!(result, "couldn't recursively mkdir");
- // error!(result, "couldn't create directory");
- // error!(result, "mode=0700");
- // error!(result, format!("path={}", file.display()));
- }
- #[test]
- fn recursive_mkdir_slash() {
- check!(fs::create_dir_all(&Path2::new("/")));
- }
- // FIXME(#12795) depends on lstat to work on windows
- #[cfg(not(windows))]
- #[test]
- fn recursive_rmdir() {
- let tmpdir = tmpdir();
- let d1 = tmpdir.join("d1");
- let dt = d1.join("t");
- let dtt = dt.join("t");
- let d2 = tmpdir.join("d2");
- let canary = d2.join("do_not_delete");
- check!(fs::create_dir_all(&dtt));
- check!(fs::create_dir_all(&d2));
- check!(check!(File::create(&canary)).write(b"foo"));
- check!(fs::soft_link(&d2, &dt.join("d2")));
- check!(fs::remove_dir_all(&d1));
- assert!(!d1.is_dir());
- assert!(canary.exists());
- }
- #[test]
- fn unicode_path_is_dir() {
- assert!(Path2::new(".").is_dir());
- assert!(!Path2::new("test/stdtest/fs.rs").is_dir());
- let tmpdir = tmpdir();
- let mut dirpath = tmpdir.path().to_path_buf();
- dirpath.push(&format!("test-가一ー你好"));
- check!(fs::create_dir(&dirpath));
- assert!(dirpath.is_dir());
- let mut filepath = dirpath;
- filepath.push("unicode-file-\u{ac00}\u{4e00}\u{30fc}\u{4f60}\u{597d}.rs");
- check!(File::create(&filepath)); // ignore return; touch only
- assert!(!filepath.is_dir());
- assert!(filepath.exists());
- }
- #[test]
- fn unicode_path_exists() {
- assert!(Path2::new(".").exists());
- assert!(!Path2::new("test/nonexistent-bogus-path").exists());
- let tmpdir = tmpdir();
- let unicode = tmpdir.path();
- let unicode = unicode.join(&format!("test-각丁ー再见"));
- check!(fs::create_dir(&unicode));
- assert!(unicode.exists());
- assert!(!Path2::new("test/unicode-bogus-path-각丁ー再见").exists());
- }
- #[test]
- fn copy_file_does_not_exist() {
- let from = Path2::new("test/nonexistent-bogus-path");
- let to = Path2::new("test/other-bogus-path");
- match fs::copy(&from, &to) {
- Ok(..) => panic!(),
- Err(..) => {
- assert!(!from.exists());
- assert!(!to.exists());
- }
- }
- }
- #[test]
- fn copy_file_ok() {
- let tmpdir = tmpdir();
- let input = tmpdir.join("in.txt");
- let out = tmpdir.join("out.txt");
- check!(check!(File::create(&input)).write(b"hello"));
- check!(fs::copy(&input, &out));
- let mut v = Vec::new();
- check!(check!(File::open(&out)).read_to_end(&mut v));
- assert_eq!(v.as_slice(), b"hello");
- assert_eq!(check!(input.metadata()).permissions(),
- check!(out.metadata()).permissions());
- }
- #[test]
- fn copy_file_dst_dir() {
- let tmpdir = tmpdir();
- let out = tmpdir.join("out");
- check!(File::create(&out));
- match fs::copy(&*out, tmpdir.path()) {
- Ok(..) => panic!(), Err(..) => {}
- }
- }
- #[test]
- fn copy_file_dst_exists() {
- let tmpdir = tmpdir();
- let input = tmpdir.join("in");
- let output = tmpdir.join("out");
- check!(check!(File::create(&input)).write("foo".as_bytes()));
- check!(check!(File::create(&output)).write("bar".as_bytes()));
- check!(fs::copy(&input, &output));
- let mut v = Vec::new();
- check!(check!(File::open(&output)).read_to_end(&mut v));
- assert_eq!(v, b"foo".to_vec());
- }
- #[test]
- fn copy_file_src_dir() {
- let tmpdir = tmpdir();
- let out = tmpdir.join("out");
- match fs::copy(tmpdir.path(), &out) {
- Ok(..) => panic!(), Err(..) => {}
- }
- assert!(!out.exists());
- }
- #[test]
- fn copy_file_preserves_perm_bits() {
- let tmpdir = tmpdir();
- let input = tmpdir.join("in.txt");
- let out = tmpdir.join("out.txt");
- let attr = check!(check!(File::create(&input)).metadata());
- let mut p = attr.permissions();
- p.set_readonly(true);
- check!(fs::set_permissions(&input, p));
- check!(fs::copy(&input, &out));
- assert!(check!(out.metadata()).permissions().readonly());
- check!(fs::set_permissions(&input, attr.permissions()));
- check!(fs::set_permissions(&out, attr.permissions()));
- }
- #[cfg(not(windows))] // FIXME(#10264) operation not permitted?
- #[test]
- fn symlinks_work() {
- let tmpdir = tmpdir();
- let input = tmpdir.join("in.txt");
- let out = tmpdir.join("out.txt");
- check!(check!(File::create(&input)).write("foobar".as_bytes()));
- check!(fs::soft_link(&input, &out));
- // if cfg!(not(windows)) {
- // assert_eq!(check!(lstat(&out)).kind, FileType::Symlink);
- // assert_eq!(check!(out.lstat()).kind, FileType::Symlink);
- // }
- assert_eq!(check!(fs::metadata(&out)).len(),
- check!(fs::metadata(&input)).len());
- let mut v = Vec::new();
- check!(check!(File::open(&out)).read_to_end(&mut v));
- assert_eq!(v, b"foobar".to_vec());
- }
- #[cfg(not(windows))] // apparently windows doesn't like symlinks
- #[test]
- fn symlink_noexist() {
- let tmpdir = tmpdir();
- // symlinks can point to things that don't exist
- check!(fs::soft_link(&tmpdir.join("foo"), &tmpdir.join("bar")));
- assert_eq!(check!(fs::read_link(&tmpdir.join("bar"))),
- tmpdir.join("foo"));
- }
- #[test]
- fn readlink_not_symlink() {
- let tmpdir = tmpdir();
- match fs::read_link(tmpdir.path()) {
- Ok(..) => panic!("wanted a failure"),
- Err(..) => {}
- }
- }
- #[test]
- fn links_work() {
- let tmpdir = tmpdir();
- let input = tmpdir.join("in.txt");
- let out = tmpdir.join("out.txt");
- check!(check!(File::create(&input)).write("foobar".as_bytes()));
- check!(fs::hard_link(&input, &out));
- assert_eq!(check!(fs::metadata(&out)).len(),
- check!(fs::metadata(&input)).len());
- assert_eq!(check!(fs::metadata(&out)).len(),
- check!(input.metadata()).len());
- let mut v = Vec::new();
- check!(check!(File::open(&out)).read_to_end(&mut v));
- assert_eq!(v, b"foobar".to_vec());
- // can't link to yourself
- match fs::hard_link(&input, &input) {
- Ok(..) => panic!("wanted a failure"),
- Err(..) => {}
- }
- // can't link to something that doesn't exist
- match fs::hard_link(&tmpdir.join("foo"), &tmpdir.join("bar")) {
- Ok(..) => panic!("wanted a failure"),
- Err(..) => {}
- }
- }
- #[test]
- fn chmod_works() {
- let tmpdir = tmpdir();
- let file = tmpdir.join("in.txt");
- check!(File::create(&file));
- let attr = check!(fs::metadata(&file));
- assert!(!attr.permissions().readonly());
- let mut p = attr.permissions();
- p.set_readonly(true);
- check!(fs::set_permissions(&file, p.clone()));
- let attr = check!(fs::metadata(&file));
- assert!(attr.permissions().readonly());
- match fs::set_permissions(&tmpdir.join("foo"), p.clone()) {
- Ok(..) => panic!("wanted an error"),
- Err(..) => {}
- }
- p.set_readonly(false);
- check!(fs::set_permissions(&file, p));
- }
- #[test]
- fn sync_doesnt_kill_anything() {
- let tmpdir = tmpdir();
- let path = tmpdir.join("in.txt");
- let mut file = check!(File::create(&path));
- check!(file.sync_all());
- check!(file.sync_data());
- check!(file.write(b"foo"));
- check!(file.sync_all());
- check!(file.sync_data());
- }
- #[test]
- fn truncate_works() {
- let tmpdir = tmpdir();
- let path = tmpdir.join("in.txt");
- let mut file = check!(File::create(&path));
- check!(file.write(b"foo"));
- check!(file.sync_all());
- // Do some simple things with truncation
- assert_eq!(check!(file.metadata()).len(), 3);
- check!(file.set_len(10));
- assert_eq!(check!(file.metadata()).len(), 10);
- check!(file.write(b"bar"));
- check!(file.sync_all());
- assert_eq!(check!(file.metadata()).len(), 10);
- let mut v = Vec::new();
- check!(check!(File::open(&path)).read_to_end(&mut v));
- assert_eq!(v, b"foobar\0\0\0\0".to_vec());
- // Truncate to a smaller length, don't seek, and then write something.
- // Ensure that the intermediate zeroes are all filled in (we're seeked
- // past the end of the file).
- check!(file.set_len(2));
- assert_eq!(check!(file.metadata()).len(), 2);
- check!(file.write(b"wut"));
- check!(file.sync_all());
- assert_eq!(check!(file.metadata()).len(), 9);
- let mut v = Vec::new();
- check!(check!(File::open(&path)).read_to_end(&mut v));
- assert_eq!(v, b"fo\0\0\0\0wut".to_vec());
- }
- #[test]
- fn open_flavors() {
- use fs::OpenOptions as OO;
- fn c<T: Clone>(t: &T) -> T { t.clone() }
- let tmpdir = tmpdir();
- let mut r = OO::new(); r.read(true);
- let mut w = OO::new(); w.write(true);
- let mut rw = OO::new(); rw.write(true).read(true);
- match r.open(&tmpdir.join("a")) {
- Ok(..) => panic!(), Err(..) => {}
- }
- // Perform each one twice to make sure that it succeeds the second time
- // (where the file exists)
- check!(c(&w).create(true).open(&tmpdir.join("b")));
- assert!(tmpdir.join("b").exists());
- check!(c(&w).create(true).open(&tmpdir.join("b")));
- check!(w.open(&tmpdir.join("b")));
- check!(c(&rw).create(true).open(&tmpdir.join("c")));
- assert!(tmpdir.join("c").exists());
- check!(c(&rw).create(true).open(&tmpdir.join("c")));
- check!(rw.open(&tmpdir.join("c")));
- check!(c(&w).append(true).create(true).open(&tmpdir.join("d")));
- asser…
Large files files are truncated, but you can click here to view the full file