Delete ctr-std to use my fork of the rust repo instead

1 files changed, 0 insertions, 3334 deletions

diff --git a/ctr-std/src/fs.rs b/ctr-std/src/fs.rs
deleted file mode 100644
index 7632fbc..0000000
--- a/ctr-std/src/fs.rs
+++ /dev/null
@@ -1,3334 +0,0 @@
-// 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 fmt;
-use ffi::OsString;
-use io::{self, SeekFrom, Seek, Read, Initializer, Write};
-use path::{Path, PathBuf};
-use sys::fs as fs_imp;
-use sys_common::{AsInnerMut, FromInner, AsInner, IntoInner};
-use time::SystemTime;
-
-/// 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.
-///
-/// Files are automatically closed when they go out of scope.
-///
-/// # Examples
-///
-/// Create a new file and write bytes to it:
-///
-/// ```no_run
-/// use std::fs::File;
-/// use std::io::prelude::*;
-///
-/// fn main() -> std::io::Result<()> {
-///     let mut file = File::create("foo.txt")?;
-///     file.write_all(b"Hello, world!")?;
-///     Ok(())
-/// }
-/// ```
-///
-/// Read the contents of a file into a [`String`]:
-///
-/// ```no_run
-/// use std::fs::File;
-/// use std::io::prelude::*;
-///
-/// fn main() -> std::io::Result<()> {
-///     let mut file = File::open("foo.txt")?;
-///     let mut contents = String::new();
-///     file.read_to_string(&mut contents)?;
-///     assert_eq!(contents, "Hello, world!");
-///     Ok(())
-/// }
-/// ```
-///
-/// It can be more efficient to read the contents of a file with a buffered
-/// [`Read`]er. This can be accomplished with [`BufReader<R>`]:
-///
-/// ```no_run
-/// use std::fs::File;
-/// use std::io::BufReader;
-/// use std::io::prelude::*;
-///
-/// fn main() -> std::io::Result<()> {
-///     let file = File::open("foo.txt")?;
-///     let mut buf_reader = BufReader::new(file);
-///     let mut contents = String::new();
-///     buf_reader.read_to_string(&mut contents)?;
-///     assert_eq!(contents, "Hello, world!");
-///     Ok(())
-/// }
-/// ```
-///
-/// Note that, although read and write methods require a `&mut File`, because
-/// of the interfaces for [`Read`] and [`Write`], the holder of a `&File` can
-/// still modify the file, either through methods that take `&File` or by
-/// retrieving the underlying OS object and modifying the file that way.
-/// Additionally, many operating systems allow concurrent modification of files
-/// by different processes. Avoid assuming that holding a `&File` means that the
-/// file will not change.
-///
-/// [`Seek`]: ../io/trait.Seek.html
-/// [`String`]: ../string/struct.String.html
-/// [`Read`]: ../io/trait.Read.html
-/// [`Write`]: ../io/trait.Write.html
-/// [`BufReader<R>`]: ../io/struct.BufReader.html
-#[stable(feature = "rust1", since = "1.0.0")]
-pub struct File {
-    inner: fs_imp::File,
-}
-
-/// Metadata information about a file.
-///
-/// This structure is returned from the [`metadata`] or
-/// [`symlink_metadata`] function or method and represents known
-/// metadata about a file such as its permissions, size, modification
-/// times, etc.
-///
-/// [`metadata`]: fn.metadata.html
-/// [`symlink_metadata`]: fn.symlink_metadata.html
-#[stable(feature = "rust1", since = "1.0.0")]
-#[derive(Clone)]
-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.
-///
-/// # Errors
-///
-/// This [`io::Result`] will be an [`Err`] if there's some sort of intermittent
-/// IO error during iteration.
-///
-/// [`read_dir`]: fn.read_dir.html
-/// [`DirEntry`]: struct.DirEntry.html
-/// [`io::Result`]: ../io/type.Result.html
-/// [`Err`]: ../result/enum.Result.html#variant.Err
-#[stable(feature = "rust1", since = "1.0.0")]
-#[derive(Debug)]
-pub struct ReadDir(fs_imp::ReadDir);
-
-/// Entries returned by the [`ReadDir`] iterator.
-///
-/// [`ReadDir`]: struct.ReadDir.html
-///
-/// 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);
-
-/// 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.
-///
-/// [`File`]: struct.File.html
-/// [`File::open`]: struct.File.html#method.open
-/// [`File::create`]: struct.File.html#method.create
-///
-/// Generally speaking, when using `OpenOptions`, you'll first call [`new`],
-/// then chain calls to methods to set each option, then call [`open`],
-/// passing the path of the file you're trying to open. This will give you a
-/// [`io::Result`][result] with a [`File`][file] inside that you can further
-/// operate on.
-///
-/// [`new`]: struct.OpenOptions.html#method.new
-/// [`open`]: struct.OpenOptions.html#method.open
-/// [result]: ../io/type.Result.html
-/// [file]: struct.File.html
-///
-/// # Examples
-///
-/// Opening a file to read:
-///
-/// ```no_run
-/// use std::fs::OpenOptions;
-///
-/// let file = OpenOptions::new().read(true).open("foo.txt");
-/// ```
-///
-/// Opening a file for both reading and writing, as well as creating it if it
-/// doesn't exist:
-///
-/// ```no_run
-/// use std::fs::OpenOptions;
-///
-/// let file = OpenOptions::new()
-///             .read(true)
-///             .write(true)
-///             .create(true)
-///             .open("foo.txt");
-/// ```
-#[derive(Clone, Debug)]
-#[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.
-///
-/// [`readonly`]: struct.Permissions.html#method.readonly
-#[derive(Clone, PartialEq, Eq, Debug)]
-#[stable(feature = "rust1", since = "1.0.0")]
-pub struct Permissions(fs_imp::FilePermissions);
-
-/// A structure representing a type of file with accessors for each file type.
-/// It is returned by [`Metadata::file_type`] method.
-///
-/// [`Metadata::file_type`]: struct.Metadata.html#method.file_type
-#[stable(feature = "file_type", since = "1.1.0")]
-#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]
-pub struct FileType(fs_imp::FileType);
-
-/// A builder used to create directories in various manners.
-///
-/// This builder also supports platform-specific options.
-#[stable(feature = "dir_builder", since = "1.6.0")]
-#[derive(Debug)]
-pub struct DirBuilder {
-    inner: fs_imp::DirBuilder,
-    recursive: bool,
-}
-
-/// How large a buffer to pre-allocate before reading the entire file.
-fn initial_buffer_size(file: &File) -> usize {
-    // Allocate one extra byte so the buffer doesn't need to grow before the
-    // final `read` call at the end of the file.  Don't worry about `usize`
-    // overflow because reading will fail regardless in that case.
-    file.metadata().map(|m| m.len() as usize + 1).unwrap_or(0)
-}
-
-/// Read the entire contents of a file into a bytes vector.
-///
-/// This is a convenience function for using [`File::open`] and [`read_to_end`]
-/// with fewer imports and without an intermediate variable.  It pre-allocates a
-/// buffer based on the file size when available, so it is generally faster than
-/// reading into a vector created with `Vec::new()`.
-///
-/// [`File::open`]: struct.File.html#method.open
-/// [`read_to_end`]: ../io/trait.Read.html#method.read_to_end
-///
-/// # Errors
-///
-/// This function will return an error if `path` does not already exist.
-/// Other errors may also be returned according to [`OpenOptions::open`].
-///
-/// [`OpenOptions::open`]: struct.OpenOptions.html#method.open
-///
-/// It will also return an error if it encounters while reading an error
-/// of a kind other than [`ErrorKind::Interrupted`].
-///
-/// [`ErrorKind::Interrupted`]: ../../std/io/enum.ErrorKind.html#variant.Interrupted
-///
-/// # Examples
-///
-/// ```no_run
-/// use std::fs;
-/// use std::net::SocketAddr;
-///
-/// fn main() -> Result<(), Box<std::error::Error + 'static>> {
-///     let foo: SocketAddr = String::from_utf8_lossy(&fs::read("address.txt")?).parse()?;
-///     Ok(())
-/// }
-/// ```
-#[stable(feature = "fs_read_write_bytes", since = "1.26.0")]
-pub fn read<P: AsRef<Path>>(path: P) -> io::Result<Vec<u8>> {
-    let mut file = File::open(path)?;
-    let mut bytes = Vec::with_capacity(initial_buffer_size(&file));
-    file.read_to_end(&mut bytes)?;
-    Ok(bytes)
-}
-
-/// Read the entire contents of a file into a string.
-///
-/// This is a convenience function for using [`File::open`] and [`read_to_string`]
-/// with fewer imports and without an intermediate variable.  It pre-allocates a
-/// buffer based on the file size when available, so it is generally faster than
-/// reading into a string created with `String::new()`.
-///
-/// [`File::open`]: struct.File.html#method.open
-/// [`read_to_string`]: ../io/trait.Read.html#method.read_to_string
-///
-/// # Errors
-///
-/// This function will return an error if `path` does not already exist.
-/// Other errors may also be returned according to [`OpenOptions::open`].
-///
-/// [`OpenOptions::open`]: struct.OpenOptions.html#method.open
-///
-/// It will also return an error if it encounters while reading an error
-/// of a kind other than [`ErrorKind::Interrupted`],
-/// or if the contents of the file are not valid UTF-8.
-///
-/// [`ErrorKind::Interrupted`]: ../../std/io/enum.ErrorKind.html#variant.Interrupted
-///
-/// # Examples
-///
-/// ```no_run
-/// use std::fs;
-/// use std::net::SocketAddr;
-///
-/// fn main() -> Result<(), Box<std::error::Error + 'static>> {
-///     let foo: SocketAddr = fs::read_to_string("address.txt")?.parse()?;
-///     Ok(())
-/// }
-/// ```
-#[stable(feature = "fs_read_write", since = "1.26.0")]
-pub fn read_to_string<P: AsRef<Path>>(path: P) -> io::Result<String> {
-    let mut file = File::open(path)?;
-    let mut string = String::with_capacity(initial_buffer_size(&file));
-    file.read_to_string(&mut string)?;
-    Ok(string)
-}
-
-/// Write a slice as the entire contents of a file.
-///
-/// This function will create a file if it does not exist,
-/// and will entirely replace its contents if it does.
-///
-/// This is a convenience function for using [`File::create`] and [`write_all`]
-/// with fewer imports.
-///
-/// [`File::create`]: struct.File.html#method.create
-/// [`write_all`]: ../io/trait.Write.html#method.write_all
-///
-/// # Examples
-///
-/// ```no_run
-/// use std::fs;
-///
-/// fn main() -> std::io::Result<()> {
-///     fs::write("foo.txt", b"Lorem ipsum")?;
-///     fs::write("bar.txt", "dolor sit")?;
-///     Ok(())
-/// }
-/// ```
-#[stable(feature = "fs_read_write_bytes", since = "1.26.0")]
-pub fn write<P: AsRef<Path>, C: AsRef<[u8]>>(path: P, contents: C) -> io::Result<()> {
-    File::create(path)?.write_all(contents.as_ref())
-}
-
-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`].
-    ///
-    /// [`OpenOptions::open`]: struct.OpenOptions.html#method.open
-    ///
-    /// # Examples
-    ///
-    /// ```no_run
-    /// use std::fs::File;
-    ///
-    /// fn main() -> std::io::Result<()> {
-    ///     let mut f = File::open("foo.txt")?;
-    ///     Ok(())
-    /// }
-    /// ```
-    #[stable(feature = "rust1", since = "1.0.0")]
-    pub fn open<P: AsRef<Path>>(path: P) -> io::Result<File> {
-        OpenOptions::new().read(true).open(path.as_ref())
-    }
-
-    /// Opens 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.
-    ///
-    /// [`OpenOptions::open`]: struct.OpenOptions.html#method.open
-    ///
-    /// # Examples
-    ///
-    /// ```no_run
-    /// use std::fs::File;
-    ///
-    /// fn main() -> std::io::Result<()> {
-    ///     let mut f = File::create("foo.txt")?;
-    ///     Ok(())
-    /// }
-    /// ```
-    #[stable(feature = "rust1", since = "1.0.0")]
-    pub fn create<P: AsRef<Path>>(path: P) -> io::Result<File> {
-        OpenOptions::new().write(true).create(true).truncate(true).open(path.as_ref())
-    }
-
-    /// Attempts to sync all OS-internal metadata to disk.
-    ///
-    /// This function will attempt to ensure that all in-core data reaches the
-    /// filesystem before returning.
-    ///
-    /// # Examples
-    ///
-    /// ```no_run
-    /// use std::fs::File;
-    /// use std::io::prelude::*;
-    ///
-    /// fn main() -> std::io::Result<()> {
-    ///     let mut f = File::create("foo.txt")?;
-    ///     f.write_all(b"Hello, world!")?;
-    ///
-    ///     f.sync_all()?;
-    ///     Ok(())
-    /// }
-    /// ```
-    #[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`].
-    ///
-    /// [`sync_all`]: struct.File.html#method.sync_all
-    ///
-    /// # Examples
-    ///
-    /// ```no_run
-    /// use std::fs::File;
-    /// use std::io::prelude::*;
-    ///
-    /// fn main() -> std::io::Result<()> {
-    ///     let mut f = File::create("foo.txt")?;
-    ///     f.write_all(b"Hello, world!")?;
-    ///
-    ///     f.sync_data()?;
-    ///     Ok(())
-    /// }
-    /// ```
-    #[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.
-    ///
-    /// The file's cursor isn't changed. In particular, if the cursor was at the
-    /// end and the file is shrunk using this operation, the cursor will now be
-    /// past the end.
-    ///
-    /// # Errors
-    ///
-    /// This function will return an error if the file is not opened for writing.
-    ///
-    /// # Examples
-    ///
-    /// ```no_run
-    /// use std::fs::File;
-    ///
-    /// fn main() -> std::io::Result<()> {
-    ///     let mut f = File::create("foo.txt")?;
-    ///     f.set_len(10)?;
-    ///     Ok(())
-    /// }
-    /// ```
-    ///
-    /// Note that this method alters the content of the underlying file, even
-    /// though it takes `&self` rather than `&mut self`.
-    #[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.
-    ///
-    /// # Examples
-    ///
-    /// ```no_run
-    /// use std::fs::File;
-    ///
-    /// fn main() -> std::io::Result<()> {
-    ///     let mut f = File::open("foo.txt")?;
-    ///     let metadata = f.metadata()?;
-    ///     Ok(())
-    /// }
-    /// ```
-    #[stable(feature = "rust1", since = "1.0.0")]
-    pub fn metadata(&self) -> io::Result<Metadata> {
-        self.inner.file_attr().map(Metadata)
-    }
-
-    /// Create a new `File` instance that shares the same underlying file handle
-    /// as the existing `File` instance. Reads, writes, and seeks will affect
-    /// both `File` instances simultaneously.
-    ///
-    /// # Examples
-    ///
-    /// Create two handles for a file named `foo.txt`:
-    ///
-    /// ```no_run
-    /// use std::fs::File;
-    ///
-    /// fn main() -> std::io::Result<()> {
-    ///     let mut file = File::open("foo.txt")?;
-    ///     let file_copy = file.try_clone()?;
-    ///     Ok(())
-    /// }
-    /// ```
-    ///
-    /// Assuming there’s a file named `foo.txt` with contents `abcdef\n`, create
-    /// two handles, seek one of them, and read the remaining bytes from the
-    /// other handle:
-    ///
-    /// ```no_run
-    /// use std::fs::File;
-    /// use std::io::SeekFrom;
-    /// use std::io::prelude::*;
-    ///
-    /// fn main() -> std::io::Result<()> {
-    ///     let mut file = File::open("foo.txt")?;
-    ///     let mut file_copy = file.try_clone()?;
-    ///
-    ///     file.seek(SeekFrom::Start(3))?;
-    ///
-    ///     let mut contents = vec![];
-    ///     file_copy.read_to_end(&mut contents)?;
-    ///     assert_eq!(contents, b"def\n");
-    ///     Ok(())
-    /// }
-    /// ```
-    #[stable(feature = "file_try_clone", since = "1.9.0")]
-    pub fn try_clone(&self) -> io::Result<File> {
-        Ok(File {
-            inner: self.inner.duplicate()?
-        })
-    }
-
-    /// Changes the permissions on the underlying file.
-    ///
-    /// # Platform-specific behavior
-    ///
-    /// This function currently corresponds to the `fchmod` function on Unix and
-    /// the `SetFileInformationByHandle` function on Windows. Note that, this
-    /// [may change in the future][changes].
-    ///
-    /// [changes]: ../io/index.html#platform-specific-behavior
-    ///
-    /// # Errors
-    ///
-    /// This function will return an error if the user lacks permission change
-    /// attributes on the underlying file. It may also return an error in other
-    /// os-specific unspecified cases.
-    ///
-    /// # Examples
-    ///
-    /// ```no_run
-    /// fn main() -> std::io::Result<()> {
-    ///     use std::fs::File;
-    ///
-    ///     let file = File::open("foo.txt")?;
-    ///     let mut perms = file.metadata()?.permissions();
-    ///     perms.set_readonly(true);
-    ///     file.set_permissions(perms)?;
-    ///     Ok(())
-    /// }
-    /// ```
-    ///
-    /// Note that this method alters the permissions of the underlying file,
-    /// even though it takes `&self` rather than `&mut self`.
-    #[stable(feature = "set_permissions_atomic", since = "1.16.0")]
-    pub fn set_permissions(&self, perm: Permissions) -> io::Result<()> {
-        self.inner.set_permissions(perm.0)
-    }
-}
-
-impl AsInner<fs_imp::File> for File {
-    fn as_inner(&self) -> &fs_imp::File { &self.inner }
-}
-impl FromInner<fs_imp::File> for File {
-    fn from_inner(f: fs_imp::File) -> File {
-        File { inner: f }
-    }
-}
-impl IntoInner<fs_imp::File> for File {
-    fn into_inner(self) -> fs_imp::File {
-        self.inner
-    }
-}
-
-#[stable(feature = "rust1", since = "1.0.0")]
-impl fmt::Debug for File {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        self.inner.fmt(f)
-    }
-}
-
-#[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)
-    }
-
-    #[inline]
-    unsafe fn initializer(&self) -> Initializer {
-        Initializer::nop()
-    }
-}
-#[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)
-    }
-
-    #[inline]
-    unsafe fn initializer(&self) -> Initializer {
-        Initializer::nop()
-    }
-}
-#[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 new set of options ready for configuration.
-    ///
-    /// All options are initially set to `false`.
-    ///
-    /// # Examples
-    ///
-    /// ```no_run
-    /// use std::fs::OpenOptions;
-    ///
-    /// let mut options = OpenOptions::new();
-    /// let file = options.read(true).open("foo.txt");
-    /// ```
-    #[stable(feature = "rust1", since = "1.0.0")]
-    pub fn new() -> OpenOptions {
-        OpenOptions(fs_imp::OpenOptions::new())
-    }
-
-    /// Sets the option for read access.
-    ///
-    /// This option, when true, will indicate that the file should be
-    /// `read`-able if opened.
-    ///
-    /// # Examples
-    ///
-    /// ```no_run
-    /// use std::fs::OpenOptions;
-    ///
-    /// let file = OpenOptions::new().read(true).open("foo.txt");
-    /// ```
-    #[stable(feature = "rust1", since = "1.0.0")]
-    pub fn read(&mut self, read: bool) -> &mut OpenOptions {
-        self.0.read(read); self
-    }
-
-    /// Sets the option for write access.
-    ///
-    /// This option, when true, will indicate that the file should be
-    /// `write`-able if opened.
-    ///
-    /// If the file already exists, any write calls on it will overwrite its
-    /// contents, without truncating it.
-    ///
-    /// # Examples
-    ///
-    /// ```no_run
-    /// use std::fs::OpenOptions;
-    ///
-    /// let file = OpenOptions::new().write(true).open("foo.txt");
-    /// ```
-    #[stable(feature = "rust1", since = "1.0.0")]
-    pub fn write(&mut self, write: bool) -> &mut OpenOptions {
-        self.0.write(write); self
-    }
-
-    /// Sets the option for the append mode.
-    ///
-    /// This option, when true, means that writes will append to a file instead
-    /// of overwriting previous contents.
-    /// Note that setting `.write(true).append(true)` has the same effect as
-    /// setting only `.append(true)`.
-    ///
-    /// For most filesystems, the operating system guarantees that all writes are
-    /// atomic: no writes get mangled because another process writes at the same
-    /// time.
-    ///
-    /// One maybe obvious note when using append-mode: make sure that all data
-    /// that belongs together is written to the file in one operation. This
-    /// can be done by concatenating strings before passing them to [`write()`],
-    /// or using a buffered writer (with a buffer of adequate size),
-    /// and calling [`flush()`] when the message is complete.
-    ///
-    /// If a file is opened with both read and append access, beware that after
-    /// opening, and after every write, the position for reading may be set at the
-    /// end of the file. So, before writing, save the current position (using
-    /// [`seek`]`(`[`SeekFrom`]`::`[`Current`]`(0))`, and restore it before the next read.
-    ///
-    /// ## Note
-    ///
-    /// This function doesn't create the file if it doesn't exist. Use the [`create`]
-    /// method to do so.
-    ///
-    /// [`write()`]: ../../std/fs/struct.File.html#method.write
-    /// [`flush()`]: ../../std/fs/struct.File.html#method.flush
-    /// [`seek`]: ../../std/fs/struct.File.html#method.seek
-    /// [`SeekFrom`]: ../../std/io/enum.SeekFrom.html
-    /// [`Current`]: ../../std/io/enum.SeekFrom.html#variant.Current
-    /// [`create`]: #method.create
-    ///
-    /// # Examples
-    ///
-    /// ```no_run
-    /// use std::fs::OpenOptions;
-    ///
-    /// let file = OpenOptions::new().append(true).open("foo.txt");
-    /// ```
-    #[stable(feature = "rust1", since = "1.0.0")]
-    pub fn append(&mut self, append: bool) -> &mut OpenOptions {
-        self.0.append(append); self
-    }
-
-    /// Sets 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.
-    ///
-    /// The file must be opened with write access for truncate to work.
-    ///
-    /// # Examples
-    ///
-    /// ```no_run
-    /// use std::fs::OpenOptions;
-    ///
-    /// let file = OpenOptions::new().write(true).truncate(true).open("foo.txt");
-    /// ```
-    #[stable(feature = "rust1", since = "1.0.0")]
-    pub fn truncate(&mut self, truncate: bool) -> &mut OpenOptions {
-        self.0.truncate(truncate); self
-    }
-
-    /// Sets 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.
-    ///
-    /// In order for the file to be created, [`write`] or [`append`] access must
-    /// be used.
-    ///
-    /// [`write`]: #method.write
-    /// [`append`]: #method.append
-    ///
-    /// # Examples
-    ///
-    /// ```no_run
-    /// use std::fs::OpenOptions;
-    ///
-    /// let file = OpenOptions::new().write(true).create(true).open("foo.txt");
-    /// ```
-    #[stable(feature = "rust1", since = "1.0.0")]
-    pub fn create(&mut self, create: bool) -> &mut OpenOptions {
-        self.0.create(create); self
-    }
-
-    /// Sets the option to always create a new file.
-    ///
-    /// This option indicates whether a new file will be created.
-    /// No file is allowed to exist at the target location, also no (dangling)
-    /// symlink.
-    ///
-    /// This option is useful because it is atomic. Otherwise between checking
-    /// whether a file exists and creating a new one, the file may have been
-    /// created by another process (a TOCTOU race condition / attack).
-    ///
-    /// If `.create_new(true)` is set, [`.create()`] and [`.truncate()`] are
-    /// ignored.
-    ///
-    /// The file must be opened with write or append access in order to create
-    /// a new file.
-    ///
-    /// [`.create()`]: #method.create
-    /// [`.truncate()`]: #method.truncate
-    ///
-    /// # Examples
-    ///
-    /// ```no_run
-    /// use std::fs::OpenOptions;
-    ///
-    /// let file = OpenOptions::new().write(true)
-    ///                              .create_new(true)
-    ///                              .open("foo.txt");
-    /// ```
-    #[stable(feature = "expand_open_options2", since = "1.9.0")]
-    pub fn create_new(&mut self, create_new: bool) -> &mut OpenOptions {
-        self.0.create_new(create_new); self
-    }
-
-    /// Opens a file at `path` with the options specified by `self`.
-    ///
-    /// # Errors
-    ///
-    /// This function will return an error under a number of different
-    /// circumstances. Some of these error conditions are listed here, together
-    /// with their [`ErrorKind`]. The mapping to [`ErrorKind`]s is not part of
-    /// the compatibility contract of the function, especially the `Other` kind
-    /// might change to more specific kinds in the future.
-    ///
-    /// * [`NotFound`]: The specified file does not exist and neither `create`
-    ///   or `create_new` is set.
-    /// * [`NotFound`]: One of the directory components of the file path does
-    ///   not exist.
-    /// * [`PermissionDenied`]: The user lacks permission to get the specified
-    ///   access rights for the file.
-    /// * [`PermissionDenied`]: The user lacks permission to open one of the
-    ///   directory components of the specified path.
-    /// * [`AlreadyExists`]: `create_new` was specified and the file already
-    ///   exists.
-    /// * [`InvalidInput`]: Invalid combinations of open options (truncate
-    ///   without write access, no access mode set, etc.).
-    /// * [`Other`]: One of the directory components of the specified file path
-    ///   was not, in fact, a directory.
-    /// * [`Other`]: Filesystem-level errors: full disk, write permission
-    ///   requested on a read-only file system, exceeded disk quota, too many
-    ///   open files, too long filename, too many symbolic links in the
-    ///   specified path (Unix-like systems only), etc.
-    ///
-    /// # Examples
-    ///
-    /// ```no_run
-    /// use std::fs::OpenOptions;
-    ///
-    /// let file = OpenOptions::new().open("foo.txt");
-    /// ```
-    ///
-    /// [`ErrorKind`]: ../io/enum.ErrorKind.html
-    /// [`AlreadyExists`]: ../io/enum.ErrorKind.html#variant.AlreadyExists
-    /// [`InvalidInput`]: ../io/enum.ErrorKind.html#variant.InvalidInput
-    /// [`NotFound`]: ../io/enum.ErrorKind.html#variant.NotFound
-    /// [`Other`]: ../io/enum.ErrorKind.html#variant.Other
-    /// [`PermissionDenied`]: ../io/enum.ErrorKind.html#variant.PermissionDenied
-    #[stable(feature = "rust1", since = "1.0.0")]
-    pub fn open<P: AsRef<Path>>(&self, path: P) -> io::Result<File> {
-        self._open(path.as_ref())
-    }
-
-    fn _open(&self, path: &Path) -> io::Result<File> {
-        let inner = fs_imp::File::open(path, &self.0)?;
-        Ok(File { 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 the file type for this metadata.
-    ///
-    /// # Examples
-    ///
-    /// ```no_run
-    /// fn main() -> std::io::Result<()> {
-    ///     use std::fs;
-    ///
-    ///     let metadata = fs::metadata("foo.txt")?;
-    ///
-    ///     println!("{:?}", metadata.file_type());
-    ///     Ok(())
-    /// }
-    /// ```
-    #[stable(feature = "file_type", since = "1.1.0")]
-    pub fn file_type(&self) -> FileType {
-        FileType(self.0.file_type())
-    }
-
-    /// Returns whether this metadata is for a directory. The
-    /// result is mutually exclusive to the result of
-    /// [`is_file`], and will be false for symlink metadata
-    /// obtained from [`symlink_metadata`].
-    ///
-    /// [`is_file`]: struct.Metadata.html#method.is_file
-    /// [`symlink_metadata`]: fn.symlink_metadata.html
-    ///
-    /// # Examples
-    ///
-    /// ```no_run
-    /// fn main() -> std::io::Result<()> {
-    ///     use std::fs;
-    ///
-    ///     let metadata = fs::metadata("foo.txt")?;
-    ///
-    ///     assert!(!metadata.is_dir());
-    ///     Ok(())
-    /// }
-    /// ```
-    #[stable(feature = "rust1", since = "1.0.0")]
-    pub fn is_dir(&self) -> bool { self.file_type().is_dir() }
-
-    /// Returns whether this metadata is for a regular file. The
-    /// result is mutually exclusive to the result of
-    /// [`is_dir`], and will be false for symlink metadata
-    /// obtained from [`symlink_metadata`].
-    ///
-    /// [`is_dir`]: struct.Metadata.html#method.is_dir
-    /// [`symlink_metadata`]: fn.symlink_metadata.html
-    ///
-    /// # Examples
-    ///
-    /// ```no_run
-    /// use std::fs;
-    ///
-    /// fn main() -> std::io::Result<()> {
-    ///     let metadata = fs::metadata("foo.txt")?;
-    ///
-    ///     assert!(metadata.is_file());
-    ///     Ok(())
-    /// }
-    /// ```
-    #[stable(feature = "rust1", since = "1.0.0")]
-    pub fn is_file(&self) -> bool { self.file_type().is_file() }
-
-    /// Returns the size of the file, in bytes, this metadata is for.
-    ///
-    /// # Examples
-    ///
-    /// ```no_run
-    /// use std::fs;
-    ///
-    /// fn main() -> std::io::Result<()> {
-    ///     let metadata = fs::metadata("foo.txt")?;
-    ///
-    ///     assert_eq!(0, metadata.len());
-    ///     Ok(())
-    /// }
-    /// ```
-    #[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.
-    ///
-    /// # Examples
-    ///
-    /// ```no_run
-    /// use std::fs;
-    ///
-    /// fn main() -> std::io::Result<()> {
-    ///     let metadata = fs::metadata("foo.txt")?;
-    ///
-    ///     assert!(!metadata.permissions().readonly());
-    ///     Ok(())
-    /// }
-    /// ```
-    #[stable(feature = "rust1", since = "1.0.0")]
-    pub fn permissions(&self) -> Permissions {
-        Permissions(self.0.perm())
-    }
-
-    /// Returns the last modification time listed in this metadata.
-    ///
-    /// The returned value corresponds to the `mtime` field of `stat` on Unix
-    /// platforms and the `ftLastWriteTime` field on Windows platforms.
-    ///
-    /// # Errors
-    ///
-    /// This field may not be available on all platforms, and will return an
-    /// `Err` on platforms where it is not available.
-    ///
-    /// # Examples
-    ///
-    /// ```no_run
-    /// use std::fs;
-    ///
-    /// fn main() -> std::io::Result<()> {
-    ///     let metadata = fs::metadata("foo.txt")?;
-    ///
-    ///     if let Ok(time) = metadata.modified() {
-    ///         println!("{:?}", time);
-    ///     } else {
-    ///         println!("Not supported on this platform");
-    ///     }
-    ///     Ok(())
-    /// }
-    /// ```
-    #[stable(feature = "fs_time", since = "1.10.0")]
-    pub fn modified(&self) -> io::Result<SystemTime> {
-        self.0.modified().map(FromInner::from_inner)
-    }
-
-    /// Returns the last access time of this metadata.
-    ///
-    /// The returned value corresponds to the `atime` field of `stat` on Unix
-    /// platforms and the `ftLastAccessTime` field on Windows platforms.
-    ///
-    /// Note that not all platforms will keep this field update in a file's
-    /// metadata, for example Windows has an option to disable updating this
-    /// time when files are accessed and Linux similarly has `noatime`.
-    ///
-    /// # Errors
-    ///
-    /// This field may not be available on all platforms, and will return an
-    /// `Err` on platforms where it is not available.
-    ///
-    /// # Examples
-    ///
-    /// ```no_run
-    /// use std::fs;
-    ///
-    /// fn main() -> std::io::Result<()> {
-    ///     let metadata = fs::metadata("foo.txt")?;
-    ///
-    ///     if let Ok(time) = metadata.accessed() {
-    ///         println!("{:?}", time);
-    ///     } else {
-    ///         println!("Not supported on this platform");
-    ///     }
-    ///     Ok(())
-    /// }
-    /// ```
-    #[stable(feature = "fs_time", since = "1.10.0")]
-    pub fn accessed(&self) -> io::Result<SystemTime> {
-        self.0.accessed().map(FromInner::from_inner)
-    }
-
-    /// Returns the creation time listed in this metadata.
-    ///
-    /// The returned value corresponds to the `birthtime` field of `stat` on
-    /// Unix platforms and the `ftCreationTime` field on Windows platforms.
-    ///
-    /// # Errors
-    ///
-    /// This field may not be available on all platforms, and will return an
-    /// `Err` on platforms where it is not available.
-    ///
-    /// # Examples
-    ///
-    /// ```no_run
-    /// use std::fs;
-    ///
-    /// fn main() -> std::io::Result<()> {
-    ///     let metadata = fs::metadata("foo.txt")?;
-    ///
-    ///     if let Ok(time) = metadata.created() {
-    ///         println!("{:?}", time);
-    ///     } else {
-    ///         println!("Not supported on this platform");
-    ///     }
-    ///     Ok(())
-    /// }
-    /// ```
-    #[stable(feature = "fs_time", since = "1.10.0")]
-    pub fn created(&self) -> io::Result<SystemTime> {
-        self.0.created().map(FromInner::from_inner)
-    }
-}
-
-#[stable(feature = "std_debug", since = "1.16.0")]
-impl fmt::Debug for Metadata {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.debug_struct("Metadata")
-            .field("file_type", &self.file_type())
-            .field("is_dir", &self.is_dir())
-            .field("is_file", &self.is_file())
-            .field("permissions", &self.permissions())
-            .field("modified", &self.modified())
-            .field("accessed", &self.accessed())
-            .field("created", &self.created())
-            .finish()
-    }
-}
-
-impl AsInner<fs_imp::FileAttr> for Metadata {
-    fn as_inner(&self) -> &fs_imp::FileAttr { &self.0 }
-}
-
-impl Permissions {
-    /// Returns whether these permissions describe a readonly (unwritable) file.
-    ///
-    /// # Examples
-    ///
-    /// ```no_run
-    /// use std::fs::File;
-    ///
-    /// fn main() -> std::io::Result<()> {
-    ///     let mut f = File::create("foo.txt")?;
-    ///     let metadata = f.metadata()?;
-    ///
-    ///     assert_eq!(false, metadata.permissions().readonly());
-    ///     Ok(())
-    /// }
-    /// ```
-    #[stable(feature = "rust1", since = "1.0.0")]
-    pub fn readonly(&self) -> bool { self.0.readonly() }
-
-    /// Modifies the readonly flag for this set of permissions. If the
-    /// `readonly` argument is `true`, using the resulting `Permission` will
-    /// update file permissions to forbid writing. Conversely, if it's `false`,
-    /// using the resulting `Permission` will update file permissions to allow
-    /// writing.
-    ///
-    /// This operation does **not** modify the filesystem. To modify the
-    /// filesystem use the `fs::set_permissions` function.
-    ///
-    /// # Examples
-    ///
-    /// ```no_run
-    /// use std::fs::File;
-    ///
-    /// fn main() -> std::io::Result<()> {
-    ///     let f = File::create("foo.txt")?;
-    ///     let metadata = f.metadata()?;
-    ///     let mut permissions = metadata.permissions();
-    ///
-    ///     permissions.set_readonly(true);
-    ///
-    ///     // filesystem doesn't change
-    ///     assert_eq!(false, metadata.permissions().readonly());
-    ///
-    ///     // just this particular `permissions`.
-    ///     assert_eq!(true, permissions.readonly());
-    ///     Ok(())
-    /// }
-    /// ```
-    #[stable(feature = "rust1", since = "1.0.0")]
-    pub fn set_readonly(&mut self, readonly: bool) {
-        self.0.set_readonly(readonly)
-    }
-}
-
-impl FileType {
-    /// Test whether this file type represents a directory. The
-    /// result is mutually exclusive to the results of
-    /// [`is_file`] and [`is_symlink`]; only zero or one of these
-    /// tests may pass.
-    ///
-    /// [`is_file`]: struct.FileType.html#method.is_file
-    /// [`is_symlink`]: struct.FileType.html#method.is_symlink
-    ///
-    /// # Examples
-    ///
-    /// ```no_run
-    /// fn main() -> std::io::Result<()> {
-    ///     use std::fs;
-    ///
-    ///     let metadata = fs::metadata("foo.txt")?;
-    ///     let file_type = metadata.file_type();
-    ///
-    ///     assert_eq!(file_type.is_dir(), false);
-    ///     Ok(())
-    /// }
-    /// ```
-    #[stable(feature = "file_type", since = "1.1.0")]
-    pub fn is_dir(&self) -> bool { self.0.is_dir() }
-
-    /// Test whether this file type represents a regular file.
-    /// The result is  mutually exclusive to the results of
-    /// [`is_dir`] and [`is_symlink`]; only zero or one of these
-    /// tests may pass.
-    ///
-    /// [`is_dir`]: struct.FileType.html#method.is_dir
-    /// [`is_symlink`]: struct.FileType.html#method.is_symlink
-    ///
-    /// # Examples
-    ///
-    /// ```no_run
-    /// fn main() -> std::io::Result<()> {
-    ///     use std::fs;
-    ///
-    ///     let metadata = fs::metadata("foo.txt")?;
-    ///     let file_type = metadata.file_type();
-    ///
-    ///     assert_eq!(file_type.is_file(), true);
-    ///     Ok(())
-    /// }
-    /// ```
-    #[stable(feature = "file_type", since = "1.1.0")]
-    pub fn is_file(&self) -> bool { self.0.is_file() }
-
-    /// Test whether this file type represents a symbolic link.
-    /// The result is mutually exclusive to the results of
-    /// [`is_dir`] and [`is_file`]; only zero or one of these
-    /// tests may pass.
-    ///
-    /// The underlying [`Metadata`] struct needs to be retrieved
-    /// with the [`fs::symlink_metadata`] function and not the
-    /// [`fs::metadata`] function. The [`fs::metadata`] function
-    /// follows symbolic links, so [`is_symlink`] would always
-    /// return false for the target file.
-    ///
-    /// [`Metadata`]: struct.Metadata.html
-    /// [`fs::metadata`]: fn.metadata.html
-    /// [`fs::symlink_metadata`]: fn.symlink_metadata.html
-    /// [`is_dir`]: struct.FileType.html#method.is_dir
-    /// [`is_file`]: struct.FileType.html#method.is_file
-    /// [`is_symlink`]: struct.FileType.html#method.is_symlink
-    ///
-    /// # Examples
-    ///
-    /// ```no_run
-    /// use std::fs;
-    ///
-    /// fn main() -> std::io::Result<()> {
-    ///     let metadata = fs::symlink_metadata("foo.txt")?;
-    ///     let file_type = metadata.file_type();
-    ///
-    ///     assert_eq!(file_type.is_symlink(), false);
-    ///     Ok(())
-    /// }
-    /// ```
-    #[stable(feature = "file_type", since = "1.1.0")]
-    pub fn is_symlink(&self) -> bool { self.0.is_symlink() }
-}
-
-impl AsInner<fs_imp::FileType> for FileType {
-    fn as_inner(&self) -> &fs_imp::FileType { &self.0 }
-}
-
-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))
-    }
-}
-
-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`
-    /// with the filename of this entry.
-    ///
-    /// # Examples
-    ///
-    /// ```no_run
-    /// use std::fs;
-    ///
-    /// fn main() -> std::io::Result<()> {
-    ///     for entry in fs::read_dir(".")? {
-    ///         let dir = entry?;
-    ///         println!("{:?}", dir.path());
-    ///     }
-    ///     Ok(())
-    /// }
-    /// ```
-    ///
-    /// This prints output like:
-    ///
-    /// ```text
-    /// "./whatever.txt"
-    /// "./foo.html"
-    /// "./hello_world.rs"
-    /// ```
-    ///
-    /// The exact text, of course, depends on what files you have in `.`.
-    #[stable(feature = "rust1", since = "1.0.0")]
-    pub fn path(&self) -> PathBuf { self.0.path() }
-
-    /// Return the metadata for the file that this entry points at.
-    ///
-    /// This function will not traverse symlinks if this entry points at a
-    /// symlink.
-    ///
-    /// # Platform-specific behavior
-    ///
-    /// On Windows this function is cheap to call (no extra system calls
-    /// needed), but on Unix platforms this function is the equivalent of
-    /// calling `symlink_metadata` on the path.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// use std::fs;
-    ///
-    /// if let Ok(entries) = fs::read_dir(".") {
-    ///     for entry in entries {
-    ///         if let Ok(entry) = entry {
-    ///             // Here, `entry` is a `DirEntry`.
-    ///             if let Ok(metadata) = entry.metadata() {
-    ///                 // Now let's show our entry's permissions!
-    ///                 println!("{:?}: {:?}", entry.path(), metadata.permissions());
-    ///             } else {
-    ///                 println!("Couldn't get metadata for {:?}", entry.path());
-    ///             }
-    ///         }
-    ///     }
-    /// }
-    /// ```
-    #[stable(feature = "dir_entry_ext", since = "1.1.0")]
-    pub fn metadata(&self) -> io::Result<Metadata> {
-        self.0.metadata().map(Metadata)
-    }
-
-    /// Return the file type for the file that this entry points at.
-    ///
-    /// This function will not traverse symlinks if this entry points at a
-    /// symlink.
-    ///
-    /// # Platform-specific behavior
-    ///
-    /// On Windows and most Unix platforms this function is free (no extra
-    /// system calls needed), but some Unix platforms may require the equivalent
-    /// call to `symlink_metadata` to learn about the target file type.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// use std::fs;
-    ///
-    /// if let Ok(entries) = fs::read_dir(".") {
-    ///     for entry in entries {
-    ///         if let Ok(entry) = entry {
-    ///             // Here, `entry` is a `DirEntry`.
-    ///             if let Ok(file_type) = entry.file_type() {
-    ///                 // Now let's show our entry's file type!
-    ///                 println!("{:?}: {:?}", entry.path(), file_type);
-    ///             } else {
-    ///                 println!("Couldn't get file type for {:?}", entry.path());
-    ///             }
-    ///         }
-    ///     }
-    /// }
-    /// ```
-    #[stable(feature = "dir_entry_ext", since = "1.1.0")]
-    pub fn file_type(&self) -> io::Result<FileType> {
-        self.0.file_type().map(FileType)
-    }
-
-    /// Returns the bare file name of this directory entry without any other
-    /// leading path component.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// use std::fs;
-    ///
-    /// if let Ok(entries) = fs::read_dir(".") {
-    ///     for entry in entries {
-    ///         if let Ok(entry) = entry {
-    ///             // Here, `entry` is a `DirEntry`.
-    ///             println!("{:?}", entry.file_name());
-    ///         }
-    ///     }
-    /// }
-    /// ```
-    #[stable(feature = "dir_entry_ext", since = "1.1.0")]
-    pub fn file_name(&self) -> OsString {
-        self.0.file_name()
-    }
-}
-
-#[stable(feature = "dir_entry_debug", since = "1.13.0")]
-impl fmt::Debug for DirEntry {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.debug_tuple("DirEntry")
-            .field(&self.path())
-            .finish()
-    }
-}
-
-impl AsInner<fs_imp::DirEntry> for DirEntry {
-    fn as_inner(&self) -> &fs_imp::DirEntry { &self.0 }
-}
-
-/// Removes a file from the filesystem.
-///
-/// Note that there is no
-/// guarantee that the file is immediately deleted (e.g. depending on
-/// platform, other open file descriptors may prevent immediate removal).
-///
-/// # Platform-specific behavior
-///
-/// This function currently corresponds to the `unlink` function on Unix
-/// and the `DeleteFile` function on Windows.
-/// Note that, this [may change in the future][changes].
-///
-/// [changes]: ../io/index.html#platform-specific-behavior
-///
-/// # Errors
-///
-/// This function will return an error in the following situations, but is not
-/// limited to just these cases:
-///
-/// * `path` points to a directory.
-/// * The user lacks permissions to remove the file.
-///
-/// # Examples
-///
-/// ```no_run
-/// use std::fs;
-///
-/// fn main() -> std::io::Result<()> {
-///     fs::remove_file("a.txt")?;
-///     Ok(())
-/// }
-/// ```
-#[stable(feature = "rust1", since = "1.0.0")]
-pub fn remove_file<P: AsRef<Path>>(path: P) -> io::Result<()> {
-    fs_imp::unlink(path.as_ref())
-}
-
-/// Given a path, query the file system to get information about a file,
-/// directory, etc.
-///
-/// This function will traverse symbolic links to query information about the
-/// destination file.
-///
-/// # Platform-specific behavior
-///
-/// This function currently corresponds to the `stat` function on Unix
-/// and the `GetFileAttributesEx` function on Windows.
-/// Note that, this [may change in the future][changes].
-///
-/// [changes]: ../io/index.html#platform-specific-behavior
-///
-/// # Errors
-///
-/// This function will return an error in the following situations, but is not
-/// limited to just these cases:
-///
-/// * The user lacks permissions to perform `metadata` call on `path`.
-/// * `path` does not exist.
-///
-/// # Examples
-///
-/// ```rust,no_run
-/// use std::fs;
-///
-/// fn main() -> std::io::Result<()> {
-///     let attr = fs::metadata("/some/file/path.txt")?;
-///     // inspect attr ...
-///     Ok(())
-/// }
-/// ```
-#[stable(feature = "rust1", since = "1.0.0")]
-pub fn metadata<P: AsRef<Path>>(path: P) -> io::Result<Metadata> {
-    fs_imp::stat(path.as_ref()).map(Metadata)
-}
-
-/// Query the metadata about a file without following symlinks.
-///
-/// # Platform-specific behavior
-///
-/// This function currently corresponds to the `lstat` function on Unix
-/// and the `GetFileAttributesEx` function on Windows.
-/// Note that, this [may change in the future][changes].
-///
-/// [changes]: ../io/index.html#platform-specific-behavior
-///
-/// # Errors
-///
-/// This function will return an error in the following situations, but is not
-/// limited to just these cases:
-///
-/// * The user lacks permissions to perform `metadata` call on `path`.
-/// * `path` does not exist.
-///
-/// # Examples
-///
-/// ```rust,no_run
-/// use std::fs;
-///
-/// fn main() -> std::io::Result<()> {
-///     let attr = fs::symlink_metadata("/some/file/path.txt")?;
-///     // inspect attr ...
-///     Ok(())
-/// }
-/// ```
-#[stable(feature = "symlink_metadata", since = "1.1.0")]
-pub fn symlink_metadata<P: AsRef<Path>>(path: P) -> io::Result<Metadata> {
-    fs_imp::lstat(path.as_ref()).map(Metadata)
-}
-
-/// Rename a file or directory to a new name, replacing the original file if
-/// `to` already exists.
-///
-/// This will not work if the new name is on a different mount point.
-///
-/// # Platform-specific behavior
-///
-/// This function currently corresponds to the `rename` function on Unix
-/// and the `MoveFileEx` function with the `MOVEFILE_REPLACE_EXISTING` flag on Windows.
-///
-/// Because of this, the behavior when both `from` and `to` exist differs. On
-/// Unix, if `from` is a directory, `to` must also be an (empty) directory. If
-/// `from` is not a directory, `to` must also be not a directory. In contrast,
-/// on Windows, `from` can be anything, but `to` must *not* be a directory.
-///
-/// Note that, this [may change in the future][changes].
-///
-/// [changes]: ../io/index.html#platform-specific-behavior
-///
-/// # Errors
-///
-/// This function will return an error in the following situations, but is not
-/// limited to just these cases:
-///
-/// * `from` does not exist.
-/// * The user lacks permissions to view contents.
-/// * `from` and `to` are on separate filesystems.
-///
-/// # Examples
-///
-/// ```no_run
-/// use std::fs;
-///
-/// fn main() -> std::io::Result<()> {
-///     fs::rename("a.txt", "b.txt")?; // Rename a.txt to b.txt
-///     Ok(())
-/// }
-/// ```
-#[stable(feature = "rust1", since = "1.0.0")]
-pub fn rename<P: AsRef<Path>, Q: AsRef<Path>>(from: P, to: Q) -> io::Result<()> {
-    fs_imp::rename(from.as_ref(), to.as_ref())
-}
-
-/// 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.
-///
-/// On success, the total number of bytes copied is returned and it is equal to
-/// the length of the `to` file as reported by `metadata`.
-///
-/// # Platform-specific behavior
-///
-/// This function currently corresponds to the `open` function in Unix
-/// with `O_RDONLY` for `from` and `O_WRONLY`, `O_CREAT`, and `O_TRUNC` for `to`.
-/// `O_CLOEXEC` is set for returned file descriptors.
-/// On Windows, this function currently corresponds to `CopyFileEx`. Alternate
-/// NTFS streams are copied but only the size of the main stream is returned by
-/// this function.
-/// Note that, this [may change in the future][changes].
-///
-/// [changes]: ../io/index.html#platform-specific-behavior
-///
-/// # 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`.
-///
-/// # Examples
-///
-/// ```no_run
-/// use std::fs;
-///
-/// fn main() -> std::io::Result<()> {
-///     fs::copy("foo.txt", "bar.txt")?;  // Copy foo.txt to bar.txt
-///     Ok(())
-/// }
-/// ```
-#[stable(feature = "rust1", since = "1.0.0")]
-pub fn copy<P: AsRef<Path>, Q: AsRef<Path>>(from: P, to: Q) -> io::Result<u64> {
-    fs_imp::copy(from.as_ref(), to.as_ref())
-}
-
-/// 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.
-///
-/// # Platform-specific behavior
-///
-/// This function currently corresponds to the `link` function on Unix
-/// and the `CreateHardLink` function on Windows.
-/// Note that, this [may change in the future][changes].
-///
-/// [changes]: ../io/index.html#platform-specific-behavior
-///
-/// # Errors
-///
-/// This function will return an error in the following situations, but is not
-/// limited to just these cases:
-///
-/// * The `src` path is not a file or doesn't exist.
-///
-/// # Examples
-///
-/// ```no_run
-/// use std::fs;
-///
-/// fn main() -> std::io::Result<()> {
-///     fs::hard_link("a.txt", "b.txt")?; // Hard link a.txt to b.txt
-///     Ok(())
-/// }
-/// ```
-#[stable(feature = "rust1", since = "1.0.0")]
-pub fn hard_link<P: AsRef<Path>, Q: AsRef<Path>>(src: P, dst: Q) -> io::Result<()> {
-    fs_imp::link(src.as_ref(), dst.as_ref())
-}
-
-/// Creates a new symbolic link on the filesystem.
-///
-/// The `dst` path will be a symbolic link pointing to the `src` path.
-/// On Windows, this will be a file symlink, not a directory symlink;
-/// for this reason, the platform-specific `std::os::unix::fs::symlink`
-/// and `std::os::windows::fs::{symlink_file, symlink_dir}` should be
-/// used instead to make the intent explicit.
-///
-/// # Examples
-///
-/// ```no_run
-/// use std::fs;
-///
-/// fn main() -> std::io::Result<()> {
-///     fs::soft_link("a.txt", "b.txt")?;
-///     Ok(())
-/// }
-/// ```
-#[stable(feature = "rust1", since = "1.0.0")]
-#[rustc_deprecated(since = "1.1.0",
-             reason = "replaced with std::os::unix::fs::symlink and \
-                       std::os::windows::fs::{symlink_file, symlink_dir}")]
-pub fn soft_link<P: AsRef<Path>, Q: AsRef<Path>>(src: P, dst: Q) -> io::Result<()> {
-    fs_imp::symlink(src.as_ref(), dst.as_ref())
-}
-
-/// Reads a symbolic link, returning the file that the link points to.
-///
-/// # Platform-specific behavior
-///
-/// This function currently corresponds to the `readlink` function on Unix
-/// and the `CreateFile` function with `FILE_FLAG_OPEN_REPARSE_POINT` and
-/// `FILE_FLAG_BACKUP_SEMANTICS` flags on Windows.
-/// Note that, this [may change in the future][changes].
-///
-/// [changes]: ../io/index.html#platform-specific-behavior
-///
-/// # Errors
-///
-/// This function will return an error in the following situations, but is not
-/// limited to just these cases:
-///
-/// * `path` is not a symbolic link.
-/// * `path` does not exist.
-///
-/// # Examples
-///
-/// ```no_run
-/// use std::fs;
-///
-/// fn main() -> std::io::Result<()> {
-///     let path = fs::read_link("a.txt")?;
-///     Ok(())
-/// }
-/// ```
-#[stable(feature = "rust1", since = "1.0.0")]
-pub fn read_link<P: AsRef<Path>>(path: P) -> io::Result<PathBuf> {
-    fs_imp::readlink(path.as_ref())
-}
-
-/// Returns the canonical, absolute form of a path with all intermediate
-/// components normalized and symbolic links resolved.
-///
-/// # Platform-specific behavior
-///
-/// This function currently corresponds to the `realpath` function on Unix
-/// and the `CreateFile` and `GetFinalPathNameByHandle` functions on Windows.
-/// Note that, this [may change in the future][changes].
-///
-/// On Windows, this converts the path to use [extended length path][path]
-/// syntax, which allows your program to use longer path names, but means you
-/// can only join backslash-delimited paths to it, and it may be incompatible
-/// with other applications (if passed to the application on the command-line,
-/// or written to a file another application may read).
-///
-/// [changes]: ../io/index.html#platform-specific-behavior
-/// [path]: https://msdn.microsoft.com/en-us/library/windows/desktop/aa365247(v=vs.85).aspx#maxpath
-///
-/// # Errors
-///
-/// This function will return an error in the following situations, but is not
-/// limited to just these cases:
-///
-/// * `path` does not exist.
-/// * A component in path is not a directory.
-///
-/// # Examples
-///
-/// ```no_run
-/// use std::fs;
-///
-/// fn main() -> std::io::Result<()> {
-///     let path = fs::canonicalize("../a/../foo.txt")?;
-///     Ok(())
-/// }
-/// ```
-#[stable(feature = "fs_canonicalize", since = "1.5.0")]
-pub fn canonicalize<P: AsRef<Path>>(path: P) -> io::Result<PathBuf> {
-    fs_imp::canonicalize(path.as_ref())
-}
-
-/// Creates a new, empty directory at the provided path
-///
-/// # Platform-specific behavior
-///
-/// This function currently corresponds to the `mkdir` function on Unix
-/// and the `CreateDirectory` function on Windows.
-/// Note that, this [may change in the future][changes].
-///
-/// [changes]: ../io/index.html#platform-specific-behavior
-///
-/// # Errors
-///
-/// This function will return an error in the following situations, but is not
-/// limited to just these cases:
-///
-/// * User lacks permissions to create directory at `path`.
-/// * `path` already exists.
-///
-/// # Examples
-///
-/// ```no_run
-/// use std::fs;
-///
-/// fn main() -> std::io::Result<()> {
-///     fs::create_dir("/some/dir")?;
-///     Ok(())
-/// }
-/// ```
-#[stable(feature = "rust1", since = "1.0.0")]
-pub fn create_dir<P: AsRef<Path>>(path: P) -> io::Result<()> {
-    DirBuilder::new().create(path.as_ref())
-}
-
-/// Recursively create a directory and all of its parent components if they
-/// are missing.
-///
-/// # Platform-specific behavior
-///
-/// This function currently corresponds to the `mkdir` function on Unix
-/// and the `CreateDirectory` function on Windows.
-/// Note that, this [may change in the future][changes].
-///
-/// [changes]: ../io/index.html#platform-specific-behavior
-///
-/// # Errors
-///
-/// This function will return an error in the following situations, but is not
-/// limited to just these cases:
-///
-/// * 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`.
-///
-/// Notable exception is made for situations where any of the directories
-/// specified in the `path` could not be created as it was being created concurrently.
-/// Such cases are considered to be successful. That is, calling `create_dir_all`
-/// concurrently from multiple threads or processes is guaranteed not to fail
-/// due to a race condition with itself.
-///
-/// # Examples
-///
-/// ```no_run
-/// use std::fs;
-///
-/// fn main() -> std::io::Result<()> {
-///     fs::create_dir_all("/some/dir")?;
-///     Ok(())
-/// }
-/// ```
-#[stable(feature = "rust1", since = "1.0.0")]
-pub fn create_dir_all<P: AsRef<Path>>(path: P) -> io::Result<()> {
-    DirBuilder::new().recursive(true).create(path.as_ref())
-}
-
-/// Removes an existing, empty directory.
-///
-/// # Platform-specific behavior
-///
-/// This function currently corresponds to the `rmdir` function on Unix
-/// and the `RemoveDirectory` function on Windows.
-/// Note that, this [may change in the future][changes].
-///
-/// [changes]: ../io/index.html#platform-specific-behavior
-///
-/// # Errors
-///
-/// This function will return an error in the following situations, but is not
-/// limited to just these cases:
-///
-/// * The user lacks permissions to remove the directory at the provided `path`.
-/// * The directory isn't empty.
-///
-/// # Examples
-///
-/// ```no_run
-/// use std::fs;
-///
-/// fn main() -> std::io::Result<()> {
-///     fs::remove_dir("/some/dir")?;
-///     Ok(())
-/// }
-/// ```
-#[stable(feature = "rust1", since = "1.0.0")]
-pub fn remove_dir<P: AsRef<Path>>(path: P) -> io::Result<()> {
-    fs_imp::rmdir(path.as_ref())
-}
-
-/// Removes a directory at this path, after removing all its contents. Use
-/// carefully!
-///
-/// This function does **not** follow symbolic links and it will simply remove the
-/// symbolic link itself.
-///
-/// # Platform-specific behavior
-///
-/// This function currently corresponds to `opendir`, `lstat`, `rm` and `rmdir` functions on Unix
-/// and the `FindFirstFile`, `GetFileAttributesEx`, `DeleteFile`, and `RemoveDirectory` functions
-/// on Windows.
-/// Note that, this [may change in the future][changes].
-///
-/// [changes]: ../io/index.html#platform-specific-behavior
-///
-/// # Errors
-///
-/// See `file::remove_file` and `fs::remove_dir`.
-///
-/// # Examples
-///
-/// ```no_run
-/// use std::fs;
-///
-/// fn main() -> std::io::Result<()> {
-///     fs::remove_dir_all("/some/dir")?;
-///     Ok(())
-/// }
-/// ```
-#[stable(feature = "rust1", since = "1.0.0")]
-pub fn remove_dir_all<P: AsRef<Path>>(path: P) -> io::Result<()> {
-    fs_imp::remove_dir_all(path.as_ref())
-}
-
-/// 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.
-///
-/// [`io::Result`]: ../io/type.Result.html
-/// [`DirEntry`]: struct.DirEntry.html
-///
-/// # Platform-specific behavior
-///
-/// This function currently corresponds to the `opendir` function on Unix
-/// and the `FindFirstFile` function on Windows.
-/// Note that, this [may change in the future][changes].
-///
-/// [changes]: ../io/index.html#platform-specific-behavior
-///
-/// # Errors
-///
-/// This function will return an error in the following situations, but is not
-/// limited to just these cases:
-///
-/// * The provided `path` doesn't exist.
-/// * The process lacks permissions to view the contents.
-/// * The `path` points at a non-directory file.
-///
-/// # Examples
-///
-/// ```
-/// use std::io;
-/// use std::fs::{self, DirEntry};
-/// use std::path::Path;
-///
-/// // one possible implementation of walking a directory only visiting files
-/// fn visit_dirs(dir: &Path, cb: &Fn(&DirEntry)) -> io::Result<()> {
-///     if dir.is_dir() {
-///         for entry in fs::read_dir(dir)? {
-///             let entry = entry?;
-///             let path = entry.path();
-///             if path.is_dir() {
-///                 visit_dirs(&path, cb)?;
-///             } else {
-///                 cb(&entry);
-///             }
-///         }
-///     }
-///     Ok(())
-/// }
-/// ```
-#[stable(feature = "rust1", since = "1.0.0")]
-pub fn read_dir<P: AsRef<Path>>(path: P) -> io::Result<ReadDir> {
-    fs_imp::readdir(path.as_ref()).map(ReadDir)
-}
-
-/// Changes the permissions found on a file or a directory.
-///
-/// # Platform-specific behavior
-///
-/// This function currently corresponds to the `chmod` function on Unix
-/// and the `SetFileAttributes` function on Windows.
-/// Note that, this [may change in the future][changes].
-///
-/// [changes]: ../io/index.html#platform-specific-behavior
-///
-/// # Errors
-///
-/// This function will return an error in the following situations, but is not
-/// limited to just these cases:
-///
-/// * `path` does not exist.
-/// * The user lacks the permission to change attributes of the file.
-///
-/// # Examples
-///
-/// ```no_run
-/// use std::fs;
-///
-/// fn main() -> std::io::Result<()> {
-///     let mut perms = fs::metadata("foo.txt")?.permissions();
-///     perms.set_readonly(true);
-///     fs::set_permissions("foo.txt", perms)?;
-///     Ok(())
-/// }
-/// ```
-#[stable(feature = "set_permissions", since = "1.1.0")]
-pub fn set_permissions<P: AsRef<Path>>(path: P, perm: Permissions)
-                                       -> io::Result<()> {
-    fs_imp::set_perm(path.as_ref(), perm.0)
-}
-
-impl DirBuilder {
-    /// Creates a new set of options with default mode/security settings for all
-    /// platforms and also non-recursive.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// use std::fs::DirBuilder;
-    ///
-    /// let builder = DirBuilder::new();
-    /// ```
-    #[stable(feature = "dir_builder", since = "1.6.0")]
-    pub fn new() -> DirBuilder {
-        DirBuilder {
-            inner: fs_imp::DirBuilder::new(),
-            recursive: false,
-        }
-    }
-
-    /// Indicates that directories should be created recursively, creating all
-    /// parent directories. Parents that do not exist are created with the same
-    /// security and permissions settings.
-    ///
-    /// This option defaults to `false`.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// use std::fs::DirBuilder;
-    ///
-    /// let mut builder = DirBuilder::new();
-    /// builder.recursive(true);
-    /// ```
-    #[stable(feature = "dir_builder", since = "1.6.0")]
-    pub fn recursive(&mut self, recursive: bool) -> &mut Self {
-        self.recursive = recursive;
-        self
-    }
-
-    /// Create the specified directory with the options configured in this
-    /// builder.
-    ///
-    /// It is considered an error if the directory already exists unless
-    /// recursive mode is enabled.
-    ///
-    /// # Examples
-    ///
-    /// ```no_run
-    /// use std::fs::{self, DirBuilder};
-    ///
-    /// let path = "/tmp/foo/bar/baz";
-    /// DirBuilder::new()
-    ///     .recursive(true)
-    ///     .create(path).unwrap();
-    ///
-    /// assert!(fs::metadata(path).unwrap().is_dir());
-    /// ```
-    #[stable(feature = "dir_builder", since = "1.6.0")]
-    pub fn create<P: AsRef<Path>>(&self, path: P) -> io::Result<()> {
-        self._create(path.as_ref())
-    }
-
-    fn _create(&self, path: &Path) -> io::Result<()> {
-        if self.recursive {
-            self.create_dir_all(path)
-        } else {
-            self.inner.mkdir(path)
-        }
-    }
-
-    fn create_dir_all(&self, path: &Path) -> io::Result<()> {
-        if path == Path::new("") {
-            return Ok(())
-        }
-
-        match self.inner.mkdir(path) {
-            Ok(()) => return Ok(()),
-            Err(ref e) if e.kind() == io::ErrorKind::NotFound => {}
-            Err(_) if path.is_dir() => return Ok(()),
-            Err(e) => return Err(e),
-        }
-        match path.parent() {
-            Some(p) => try!(self.create_dir_all(p)),
-            None => return Err(io::Error::new(io::ErrorKind::Other, "failed to create whole tree")),
-        }
-        match self.inner.mkdir(path) {
-            Ok(()) => Ok(()),
-            Err(_) if path.is_dir() => Ok(()),
-            Err(e) => Err(e),
-        }
-    }
-}
-
-impl AsInnerMut<fs_imp::DirBuilder> for DirBuilder {
-    fn as_inner_mut(&mut self) -> &mut fs_imp::DirBuilder {
-        &mut self.inner
-    }
-}
-
-#[cfg(all(test, not(any(target_os = "cloudabi", target_os = "emscripten"))))]
-mod tests {
-    use io::prelude::*;
-
-    use fs::{self, File, OpenOptions};
-    use io::{ErrorKind, SeekFrom};
-    use path::Path;
-    use rand::{StdRng, Rng};
-    use str;
-    use sys_common::io::test::{TempDir, tmpdir};
-    use thread;
-
-    #[cfg(windows)]
-    use os::windows::fs::{symlink_dir, symlink_file};
-    #[cfg(windows)]
-    use sys::fs::symlink_junction;
-    #[cfg(unix)]
-    use os::unix::fs::symlink as symlink_dir;
-    #[cfg(unix)]
-    use os::unix::fs::symlink as symlink_file;
-    #[cfg(unix)]
-    use os::unix::fs::symlink as symlink_junction;
-
-    macro_rules! check { ($e:expr) => (
-        match $e {
-            Ok(t) => t,
-            Err(e) => panic!("{} failed with: {}", stringify!($e), e),
-        }
-    ) }
-
-    #[cfg(windows)]
-    macro_rules! error { ($e:expr, $s:expr) => (
-        match $e {
-            Ok(_) => panic!("Unexpected success. Should've been: {:?}", $s),
-            Err(ref err) => assert!(err.raw_os_error() == Some($s),
-                                    format!("`{}` did not have a code of `{}`", err, $s))
-        }
-    ) }
-
-    #[cfg(unix)]
-    macro_rules! error { ($e:expr, $s:expr) => ( error_contains!($e, $s) ) }
-
-    macro_rules! error_contains { ($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))
-        }
-    ) }
-
-    // Several test fail on windows if the user does not have permission to
-    // create symlinks (the `SeCreateSymbolicLinkPrivilege`). Instead of
-    // disabling these test on Windows, use this function to test whether we
-    // have permission, and return otherwise. This way, we still don't run these
-    // tests most of the time, but at least we do if the user has the right
-    // permissions.
-    pub fn got_symlink_permission(tmpdir: &TempDir) -> bool {
-        if cfg!(unix) { return true }
-        let link = tmpdir.join("some_hopefully_unique_link_name");
-
-        match symlink_file(r"nonexisting_target", link) {
-            Ok(_) => true,
-            // ERROR_PRIVILEGE_NOT_HELD = 1314
-            Err(ref err) if err.raw_os_error() == Some(1314) => false,
-            Err(_) => true,
-        }
-    }
-
-    #[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)) {
-                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);
-
-        #[cfg(unix)]
-        error!(result, "No such file or directory");
-        #[cfg(windows)]
-        error!(result, 2); // ERROR_FILE_NOT_FOUND
-    }
-
-    #[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);
-
-        #[cfg(unix)]
-        error!(result, "No such file or directory");
-        #[cfg(windows)]
-        error!(result, 2); // ERROR_FILE_NOT_FOUND
-    }
-
-    #[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 tell_pos_pre_read;
-        let 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_io_eof() {
-        let tmpdir = tmpdir();
-        let filename = tmpdir.join("file_rt_io_file_test_eof.txt");
-        let mut buf = [0; 256];
-        {
-            let oo = OpenOptions::new().create_new(true).write(true).read(true).clone();
-            let mut rw = check!(oo.open(&filename));
-            assert_eq!(check!(rw.read(&mut buf)), 0);
-            assert_eq!(check!(rw.read(&mut buf)), 0);
-        }
-        check!(fs::remove_file(&filename));
-    }
-
-    #[test]
-    #[cfg(unix)]
-    fn file_test_io_read_write_at() {
-        use os::unix::fs::FileExt;
-
-        let tmpdir = tmpdir();
-        let filename = tmpdir.join("file_rt_io_file_test_read_write_at.txt");
-        let mut buf = [0; 256];
-        let write1 = "asdf";
-        let write2 = "qwer-";
-        let write3 = "-zxcv";
-        let content = "qwer-asdf-zxcv";
-        {
-            let oo = OpenOptions::new().create_new(true).write(true).read(true).clone();
-            let mut rw = check!(oo.open(&filename));
-            assert_eq!(check!(rw.write_at(write1.as_bytes(), 5)), write1.len());
-            assert_eq!(check!(rw.seek(SeekFrom::Current(0))), 0);
-            assert_eq!(check!(rw.read_at(&mut buf, 5)), write1.len());
-            assert_eq!(str::from_utf8(&buf[..write1.len()]), Ok(write1));
-            assert_eq!(check!(rw.seek(SeekFrom::Current(0))), 0);
-            assert_eq!(check!(rw.read_at(&mut buf[..write2.len()], 0)), write2.len());
-            assert_eq!(str::from_utf8(&buf[..write2.len()]), Ok("\0\0\0\0\0"));
-            assert_eq!(check!(rw.seek(SeekFrom::Current(0))), 0);
-            assert_eq!(check!(rw.write(write2.as_bytes())), write2.len());
-            assert_eq!(check!(rw.seek(SeekFrom::Current(0))), 5);
-            assert_eq!(check!(rw.read(&mut buf)), write1.len());
-            assert_eq!(str::from_utf8(&buf[..write1.len()]), Ok(write1));
-            assert_eq!(check!(rw.seek(SeekFrom::Current(0))), 9);
-            assert_eq!(check!(rw.read_at(&mut buf[..write2.len()], 0)), write2.len());
-            assert_eq!(str::from_utf8(&buf[..write2.len()]), Ok(write2));
-            assert_eq!(check!(rw.seek(SeekFrom::Current(0))), 9);
-            assert_eq!(check!(rw.write_at(write3.as_bytes(), 9)), write3.len());
-            assert_eq!(check!(rw.seek(SeekFrom::Current(0))), 9);
-        }
-        {
-            let mut read = check!(File::open(&filename));
-            assert_eq!(check!(read.read_at(&mut buf, 0)), content.len());
-            assert_eq!(str::from_utf8(&buf[..content.len()]), Ok(content));
-            assert_eq!(check!(read.seek(SeekFrom::Current(0))), 0);
-            assert_eq!(check!(read.seek(SeekFrom::End(-5))), 9);
-            assert_eq!(check!(read.read_at(&mut buf, 0)), content.len());
-            assert_eq!(str::from_utf8(&buf[..content.len()]), Ok(content));
-            assert_eq!(check!(read.seek(SeekFrom::Current(0))), 9);
-            assert_eq!(check!(read.read(&mut buf)), write3.len());
-            assert_eq!(str::from_utf8(&buf[..write3.len()]), Ok(write3));
-            assert_eq!(check!(read.seek(SeekFrom::Current(0))), 14);
-            assert_eq!(check!(read.read_at(&mut buf, 0)), content.len());
-            assert_eq!(str::from_utf8(&buf[..content.len()]), Ok(content));
-            assert_eq!(check!(read.seek(SeekFrom::Current(0))), 14);
-            assert_eq!(check!(read.read_at(&mut buf, 14)), 0);
-            assert_eq!(check!(read.read_at(&mut buf, 15)), 0);
-            assert_eq!(check!(read.seek(SeekFrom::Current(0))), 14);
-        }
-        check!(fs::remove_file(&filename));
-    }
-
-    #[test]
-    #[cfg(unix)]
-    fn set_get_unix_permissions() {
-        use os::unix::fs::PermissionsExt;
-
-        let tmpdir = tmpdir();
-        let filename = &tmpdir.join("set_get_unix_permissions");
-        check!(fs::create_dir(filename));
-        let mask = 0o7777;
-
-        check!(fs::set_permissions(filename,
-                                   fs::Permissions::from_mode(0)));
-        let metadata0 = check!(fs::metadata(filename));
-        assert_eq!(mask & metadata0.permissions().mode(), 0);
-
-        check!(fs::set_permissions(filename,
-                                   fs::Permissions::from_mode(0o1777)));
-        let metadata1 = check!(fs::metadata(filename));
-        assert_eq!(mask & metadata1.permissions().mode(), 0o1777);
-    }
-
-    #[test]
-    #[cfg(windows)]
-    fn file_test_io_seek_read_write() {
-        use os::windows::fs::FileExt;
-
-        let tmpdir = tmpdir();
-        let filename = tmpdir.join("file_rt_io_file_test_seek_read_write.txt");
-        let mut buf = [0; 256];
-        let write1 = "asdf";
-        let write2 = "qwer-";
-        let write3 = "-zxcv";
-        let content = "qwer-asdf-zxcv";
-        {
-            let oo = OpenOptions::new().create_new(true).write(true).read(true).clone();
-            let mut rw = check!(oo.open(&filename));
-            assert_eq!(check!(rw.seek_write(write1.as_bytes(), 5)), write1.len());
-            assert_eq!(check!(rw.seek(SeekFrom::Current(0))), 9);
-            assert_eq!(check!(rw.seek_read(&mut buf, 5)), write1.len());
-            assert_eq!(str::from_utf8(&buf[..write1.len()]), Ok(write1));
-            assert_eq!(check!(rw.seek(SeekFrom::Current(0))), 9);
-            assert_eq!(check!(rw.seek(SeekFrom::Start(0))), 0);
-            assert_eq!(check!(rw.write(write2.as_bytes())), write2.len());
-            assert_eq!(check!(rw.seek(SeekFrom::Current(0))), 5);
-            assert_eq!(check!(rw.read(&mut buf)), write1.len());
-            assert_eq!(str::from_utf8(&buf[..write1.len()]), Ok(write1));
-            assert_eq!(check!(rw.seek(SeekFrom::Current(0))), 9);
-            assert_eq!(check!(rw.seek_read(&mut buf[..write2.len()], 0)), write2.len());
-            assert_eq!(str::from_utf8(&buf[..write2.len()]), Ok(write2));
-            assert_eq!(check!(rw.seek(SeekFrom::Current(0))), 5);
-            assert_eq!(check!(rw.seek_write(write3.as_bytes(), 9)), write3.len());
-            assert_eq!(check!(rw.seek(SeekFrom::Current(0))), 14);
-        }
-        {
-            let mut read = check!(File::open(&filename));
-            assert_eq!(check!(read.seek_read(&mut buf, 0)), content.len());
-            assert_eq!(str::from_utf8(&buf[..content.len()]), Ok(content));
-            assert_eq!(check!(read.seek(SeekFrom::Current(0))), 14);
-            assert_eq!(check!(read.seek(SeekFrom::End(-5))), 9);
-            assert_eq!(check!(read.seek_read(&mut buf, 0)), content.len());
-            assert_eq!(str::from_utf8(&buf[..content.len()]), Ok(content));
-            assert_eq!(check!(read.seek(SeekFrom::Current(0))), 14);
-            assert_eq!(check!(read.seek(SeekFrom::End(-5))), 9);
-            assert_eq!(check!(read.read(&mut buf)), write3.len());
-            assert_eq!(str::from_utf8(&buf[..write3.len()]), Ok(write3));
-            assert_eq!(check!(read.seek(SeekFrom::Current(0))), 14);
-            assert_eq!(check!(read.seek_read(&mut buf, 0)), content.len());
-            assert_eq!(str::from_utf8(&buf[..content.len()]), Ok(content));
-            assert_eq!(check!(read.seek(SeekFrom::Current(0))), 14);
-            assert_eq!(check!(read.seek_read(&mut buf, 14)), 0);
-            assert_eq!(check!(read.seek_read(&mut buf, 15)), 0);
-        }
-        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());
-        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 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_create_new_already_exists_error() {
-        let tmpdir = tmpdir();
-        let file = &tmpdir.join("file_create_new_error_exists");
-        check!(fs::File::create(file));
-        let e = fs::OpenOptions::new().write(true).create_new(true).open(file).unwrap_err();
-        assert_eq!(e.kind(), ErrorKind::AlreadyExists);
-    }
-
-    #[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).unwrap_err();
-        assert_eq!(e.kind(), ErrorKind::AlreadyExists);
-    }
-
-    #[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());
-    }
-
-    #[test]
-    fn concurrent_recursive_mkdir() {
-        for _ in 0..100 {
-            let dir = tmpdir();
-            let mut dir = dir.join("a");
-            for _ in 0..40 {
-                dir = dir.join("a");
-            }
-            let mut join = vec!();
-            for _ in 0..8 {
-                let dir = dir.clone();
-                join.push(thread::spawn(move || {
-                    check!(fs::create_dir_all(&dir));
-                }))
-            }
-
-            // No `Display` on result of `join()`
-            join.drain(..).map(|join| join.join().unwrap()).count();
-        }
-    }
-
-    #[test]
-    fn recursive_mkdir_slash() {
-        check!(fs::create_dir_all(Path::new("/")));
-    }
-
-    #[test]
-    fn recursive_mkdir_dot() {
-        check!(fs::create_dir_all(Path::new(".")));
-    }
-
-    #[test]
-    fn recursive_mkdir_empty() {
-        check!(fs::create_dir_all(Path::new("")));
-    }
-
-    #[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!(symlink_junction(&d2, &dt.join("d2")));
-        let _ = symlink_file(&canary, &d1.join("canary"));
-        check!(fs::remove_dir_all(&d1));
-
-        assert!(!d1.is_dir());
-        assert!(canary.exists());
-    }
-
-    #[test]
-    fn recursive_rmdir_of_symlink() {
-        // test we do not recursively delete a symlink but only dirs.
-        let tmpdir = tmpdir();
-        let link = tmpdir.join("d1");
-        let dir = tmpdir.join("d2");
-        let canary = dir.join("do_not_delete");
-        check!(fs::create_dir_all(&dir));
-        check!(check!(File::create(&canary)).write(b"foo"));
-        check!(symlink_junction(&dir, &link));
-        check!(fs::remove_dir_all(&link));
-
-        assert!(!link.is_dir());
-        assert!(canary.exists());
-    }
-
-    #[test]
-    // only Windows makes a distinction between file and directory symlinks.
-    #[cfg(windows)]
-    fn recursive_rmdir_of_file_symlink() {
-        let tmpdir = tmpdir();
-        if !got_symlink_permission(&tmpdir) { return };
-
-        let f1 = tmpdir.join("f1");
-        let f2 = tmpdir.join("f2");
-        check!(check!(File::create(&f1)).write(b"foo"));
-        check!(symlink_file(&f1, &f2));
-        match fs::remove_dir_all(&f2) {
-            Ok(..) => panic!("wanted a failure"),
-            Err(..) => {}
-        }
-    }
-
-    #[test]
-    fn unicode_path_is_dir() {
-        assert!(Path::new(".").is_dir());
-        assert!(!Path::new("test/stdtest/fs.rs").is_dir());
-
-        let tmpdir = tmpdir();
-
-        let mut dirpath = tmpdir.path().to_path_buf();
-        dirpath.push("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!(Path::new(".").exists());
-        assert!(!Path::new("test/nonexistent-bogus-path").exists());
-
-        let tmpdir = tmpdir();
-        let unicode = tmpdir.path();
-        let unicode = unicode.join("test-각丁ー再见");
-        check!(fs::create_dir(&unicode));
-        assert!(unicode.exists());
-        assert!(!Path::new("test/unicode-bogus-path-각丁ー再见").exists());
-    }
-
-    #[test]
-    fn copy_file_does_not_exist() {
-        let from = Path::new("test/nonexistent-bogus-path");
-        let to = Path::new("test/other-bogus-path");
-
-        match fs::copy(&from, &to) {
-            Ok(..) => panic!(),
-            Err(..) => {
-                assert!(!from.exists());
-                assert!(!to.exists());
-            }
-        }
-    }
-
-    #[test]
-    fn copy_src_does_not_exist() {
-        let tmpdir = tmpdir();
-        let from = Path::new("test/nonexistent-bogus-path");
-        let to = tmpdir.join("out.txt");
-        check!(check!(File::create(&to)).write(b"hello"));
-        assert!(fs::copy(&from, &to).is_err());
-        assert!(!from.exists());
-        let mut v = Vec::new();
-        check!(check!(File::open(&to)).read_to_end(&mut v));
-        assert_eq!(v, b"hello");
-    }
-
-    #[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, 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()));
-    }
-
-    #[test]
-    #[cfg(windows)]
-    fn copy_file_preserves_streams() {
-        let tmp = tmpdir();
-        check!(check!(File::create(tmp.join("in.txt:bunny"))).write("carrot".as_bytes()));
-        assert_eq!(check!(fs::copy(tmp.join("in.txt"), tmp.join("out.txt"))), 0);
-        assert_eq!(check!(tmp.join("out.txt").metadata()).len(), 0);
-        let mut v = Vec::new();
-        check!(check!(File::open(tmp.join("out.txt:bunny"))).read_to_end(&mut v));
-        assert_eq!(v, b"carrot".to_vec());
-    }
-
-    #[test]
-    fn copy_file_returns_metadata_len() {
-        let tmp = tmpdir();
-        let in_path = tmp.join("in.txt");
-        let out_path = tmp.join("out.txt");
-        check!(check!(File::create(&in_path)).write(b"lettuce"));
-        #[cfg(windows)]
-        check!(check!(File::create(tmp.join("in.txt:bunny"))).write(b"carrot"));
-        let copied_len = check!(fs::copy(&in_path, &out_path));
-        assert_eq!(check!(out_path.metadata()).len(), copied_len);
-    }
-
-    #[test]
-    fn symlinks_work() {
-        let tmpdir = tmpdir();
-        if !got_symlink_permission(&tmpdir) { return };
-
-        let input = tmpdir.join("in.txt");
-        let out = tmpdir.join("out.txt");
-
-        check!(check!(File::create(&input)).write("foobar".as_bytes()));
-        check!(symlink_file(&input, &out));
-        assert!(check!(out.symlink_metadata()).file_type().is_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());
-    }
-
-    #[test]
-    fn symlink_noexist() {
-        // Symlinks can point to things that don't exist
-        let tmpdir = tmpdir();
-        if !got_symlink_permission(&tmpdir) { return };
-
-        // Use a relative path for testing. Symlinks get normalized by Windows,
-        // so we may not get the same path back for absolute paths
-        check!(symlink_file(&"foo", &tmpdir.join("bar")));
-        assert_eq!(check!(fs::read_link(&tmpdir.join("bar"))).to_str().unwrap(),
-                   "foo");
-    }
-
-    #[test]
-    fn read_link() {
-        if cfg!(windows) {
-            // directory symlink
-            assert_eq!(check!(fs::read_link(r"C:\Users\All Users")).to_str().unwrap(),
-                       r"C:\ProgramData");
-            // junction
-            assert_eq!(check!(fs::read_link(r"C:\Users\Default User")).to_str().unwrap(),
-                       r"C:\Users\Default");
-            // junction with special permissions
-            assert_eq!(check!(fs::read_link(r"C:\Documents and Settings\")).to_str().unwrap(),
-                       r"C:\Users");
-        }
-        let tmpdir = tmpdir();
-        let link = tmpdir.join("link");
-        if !got_symlink_permission(&tmpdir) { return };
-        check!(symlink_file(&"foo", &link));
-        assert_eq!(check!(fs::read_link(&link)).to_str().unwrap(), "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 fchmod_works() {
-        let tmpdir = tmpdir();
-        let path = tmpdir.join("in.txt");
-
-        let file = check!(File::create(&path));
-        let attr = check!(fs::metadata(&path));
-        assert!(!attr.permissions().readonly());
-        let mut p = attr.permissions();
-        p.set_readonly(true);
-        check!(file.set_permissions(p.clone()));
-        let attr = check!(fs::metadata(&path));
-        assert!(attr.permissions().readonly());
-
-        p.set_readonly(false);
-        check!(file.set_permissions(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 have `seek`ed
-        // 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.read(true).write(true);
-        let mut a = OO::new(); a.append(true);
-        let mut ra = OO::new(); ra.read(true).append(true);
-
-        #[cfg(windows)]
-        let invalid_options = 87; // ERROR_INVALID_PARAMETER
-        #[cfg(unix)]
-        let invalid_options = "Invalid argument";
-
-        // Test various combinations of creation modes and access modes.
-        //
-        // Allowed:
-        // creation mode           | read  | write | read-write | append | read-append |
-        // :-----------------------|:-----:|:-----:|:----------:|:------:|:-----------:|
-        // not set (open existing) |   X   |   X   |     X      |   X    |      X      |
-        // create                  |       |   X   |     X      |   X    |      X      |
-        // truncate                |       |   X   |     X      |        |             |
-        // create and truncate     |       |   X   |     X      |        |             |
-        // create_new              |       |   X   |     X      |   X    |      X      |
-        //
-        // tested in reverse order, so 'create_new' creates the file, and 'open existing' opens it.
-
-        // write-only
-        check!(c(&w).create_new(true).open(&tmpdir.join("a")));
-        check!(c(&w).create(true).truncate(true).open(&tmpdir.join("a")));
-        check!(c(&w).truncate(true).open(&tmpdir.join("a")));
-        check!(c(&w).create(true).open(&tmpdir.join("a")));
-        check!(c(&w).open(&tmpdir.join("a")));
-
-        // read-only
-        error!(c(&r).create_new(true).open(&tmpdir.join("b")), invalid_options);
-        error!(c(&r).create(true).truncate(true).open(&tmpdir.join("b")), invalid_options);
-        error!(c(&r).truncate(true).open(&tmpdir.join("b")), invalid_options);
-        error!(c(&r).create(true).open(&tmpdir.join("b")), invalid_options);
-        check!(c(&r).open(&tmpdir.join("a"))); // try opening the file created with write_only
-
-        // read-write
-        check!(c(&rw).create_new(true).open(&tmpdir.join("c")));
-        check!(c(&rw).create(true).truncate(true).open(&tmpdir.join("c")));
-        check!(c(&rw).truncate(true).open(&tmpdir.join("c")));
-        check!(c(&rw).create(true).open(&tmpdir.join("c")));
-        check!(c(&rw).open(&tmpdir.join("c")));
-
-        // append
-        check!(c(&a).create_new(true).open(&tmpdir.join("d")));
-        error!(c(&a).create(true).truncate(true).open(&tmpdir.join("d")), invalid_options);
-        error!(c(&a).truncate(true).open(&tmpdir.join("d")), invalid_options);
-        check!(c(&a).create(true).open(&tmpdir.join("d")));
-        check!(c(&a).open(&tmpdir.join("d")));
-
-        // read-append
-        check!(c(&ra).create_new(true).open(&tmpdir.join("e")));
-        error!(c(&ra).create(true).truncate(true).open(&tmpdir.join("e")), invalid_options);
-        error!(c(&ra).truncate(true).open(&tmpdir.join("e")), invalid_options);
-        check!(c(&ra).create(true).open(&tmpdir.join("e")));
-        check!(c(&ra).open(&tmpdir.join("e")));
-
-        // Test opening a file without setting an access mode
-        let mut blank = OO::new();
-         error!(blank.create(true).open(&tmpdir.join("f")), invalid_options);
-
-        // Test write works
-        check!(check!(File::create(&tmpdir.join("h"))).write("foobar".as_bytes()));
-
-        // Test write fails for read-only
-        check!(r.open(&tmpdir.join("h")));
-        {
-            let mut f = check!(r.open(&tmpdir.join("h")));
-            assert!(f.write("wut".as_bytes()).is_err());
-        }
-
-        // Test write overwrites
-        {
-            let mut f = check!(c(&w).open(&tmpdir.join("h")));
-            check!(f.write("baz".as_bytes()));
-        }
-        {
-            let mut f = check!(c(&r).open(&tmpdir.join("h")));
-            let mut b = vec![0; 6];
-            check!(f.read(&mut b));
-            assert_eq!(b, "bazbar".as_bytes());
-        }
-
-        // Test truncate works
-        {
-            let mut f = check!(c(&w).truncate(true).open(&tmpdir.join("h")));
-            check!(f.write("foo".as_bytes()));
-        }
-        assert_eq!(check!(fs::metadata(&tmpdir.join("h"))).len(), 3);
-
-        // Test append works
-        assert_eq!(check!(fs::metadata(&tmpdir.join("h"))).len(), 3);
-        {
-            let mut f = check!(c(&a).open(&tmpdir.join("h")));
-            check!(f.write("bar".as_bytes()));
-        }
-        assert_eq!(check!(fs::metadata(&tmpdir.join("h"))).len(), 6);
-
-        // Test .append(true) equals .write(true).append(true)
-        {
-            let mut f = check!(c(&w).append(true).open(&tmpdir.join("h")));
-            check!(f.write("baz".as_bytes()));
-        }
-        assert_eq!(check!(fs::metadata(&tmpdir.join("h"))).len(), 9);
-    }
-
-    #[test]
-    fn _assert_send_sync() {
-        fn _assert_send_sync<T: Send + Sync>() {}
-        _assert_send_sync::<OpenOptions>();
-    }
-
-    #[test]
-    fn binary_file() {
-        let mut bytes = [0; 1024];
-        StdRng::new().unwrap().fill_bytes(&mut bytes);
-
-        let tmpdir = tmpdir();
-
-        check!(check!(File::create(&tmpdir.join("test"))).write(&bytes));
-        let mut v = Vec::new();
-        check!(check!(File::open(&tmpdir.join("test"))).read_to_end(&mut v));
-        assert!(v == &bytes[..]);
-    }
-
-    #[test]
-    fn write_then_read() {
-        let mut bytes = [0; 1024];
-        StdRng::new().unwrap().fill_bytes(&mut bytes);
-
-        let tmpdir = tmpdir();
-
-        check!(fs::write(&tmpdir.join("test"), &bytes[..]));
-        let v = check!(fs::read(&tmpdir.join("test")));
-        assert!(v == &bytes[..]);
-
-        check!(fs::write(&tmpdir.join("not-utf8"), &[0xFF]));
-        error_contains!(fs::read_to_string(&tmpdir.join("not-utf8")),
-                        "stream did not contain valid UTF-8");
-
-        let s = "𐁁𐀓𐀠𐀴𐀍";
-        check!(fs::write(&tmpdir.join("utf8"), s.as_bytes()));
-        let string = check!(fs::read_to_string(&tmpdir.join("utf8")));
-        assert_eq!(string, s);
-    }
-
-    #[test]
-    fn file_try_clone() {
-        let tmpdir = tmpdir();
-
-        let mut f1 = check!(OpenOptions::new()
-                                       .read(true)
-                                       .write(true)
-                                       .create(true)
-                                       .open(&tmpdir.join("test")));
-        let mut f2 = check!(f1.try_clone());
-
-        check!(f1.write_all(b"hello world"));
-        check!(f1.seek(SeekFrom::Start(2)));
-
-        let mut buf = vec![];
-        check!(f2.read_to_end(&mut buf));
-        assert_eq!(buf, b"llo world");
-        drop(f2);
-
-        check!(f1.write_all(b"!"));
-    }
-
-    #[test]
-    #[cfg(not(windows))]
-    fn unlink_readonly() {
-        let tmpdir = tmpdir();
-        let path = tmpdir.join("file");
-        check!(File::create(&path));
-        let mut perm = check!(fs::metadata(&path)).permissions();
-        perm.set_readonly(true);
-        check!(fs::set_permissions(&path, perm));
-        check!(fs::remove_file(&path));
-    }
-
-    #[test]
-    fn mkdir_trailing_slash() {
-        let tmpdir = tmpdir();
-        let path = tmpdir.join("file");
-        check!(fs::create_dir_all(&path.join("a/")));
-    }
-
-    #[test]
-    fn canonicalize_works_simple() {
-        let tmpdir = tmpdir();
-        let tmpdir = fs::canonicalize(tmpdir.path()).unwrap();
-        let file = tmpdir.join("test");
-        File::create(&file).unwrap();
-        assert_eq!(fs::canonicalize(&file).unwrap(), file);
-    }
-
-    #[test]
-    fn realpath_works() {
-        let tmpdir = tmpdir();
-        if !got_symlink_permission(&tmpdir) { return };
-
-        let tmpdir = fs::canonicalize(tmpdir.path()).unwrap();
-        let file = tmpdir.join("test");
-        let dir = tmpdir.join("test2");
-        let link = dir.join("link");
-        let linkdir = tmpdir.join("test3");
-
-        File::create(&file).unwrap();
-        fs::create_dir(&dir).unwrap();
-        symlink_file(&file, &link).unwrap();
-        symlink_dir(&dir, &linkdir).unwrap();
-
-        assert!(link.symlink_metadata().unwrap().file_type().is_symlink());
-
-        assert_eq!(fs::canonicalize(&tmpdir).unwrap(), tmpdir);
-        assert_eq!(fs::canonicalize(&file).unwrap(), file);
-        assert_eq!(fs::canonicalize(&link).unwrap(), file);
-        assert_eq!(fs::canonicalize(&linkdir).unwrap(), dir);
-        assert_eq!(fs::canonicalize(&linkdir.join("link")).unwrap(), file);
-    }
-
-    #[test]
-    fn realpath_works_tricky() {
-        let tmpdir = tmpdir();
-        if !got_symlink_permission(&tmpdir) { return };
-
-        let tmpdir = fs::canonicalize(tmpdir.path()).unwrap();
-        let a = tmpdir.join("a");
-        let b = a.join("b");
-        let c = b.join("c");
-        let d = a.join("d");
-        let e = d.join("e");
-        let f = a.join("f");
-
-        fs::create_dir_all(&b).unwrap();
-        fs::create_dir_all(&d).unwrap();
-        File::create(&f).unwrap();
-        if cfg!(not(windows)) {
-            symlink_dir("../d/e", &c).unwrap();
-            symlink_file("../f", &e).unwrap();
-        }
-        if cfg!(windows) {
-            symlink_dir(r"..\d\e", &c).unwrap();
-            symlink_file(r"..\f", &e).unwrap();
-        }
-
-        assert_eq!(fs::canonicalize(&c).unwrap(), f);
-        assert_eq!(fs::canonicalize(&e).unwrap(), f);
-    }
-
-    #[test]
-    fn dir_entry_methods() {
-        let tmpdir = tmpdir();
-
-        fs::create_dir_all(&tmpdir.join("a")).unwrap();
-        File::create(&tmpdir.join("b")).unwrap();
-
-        for file in tmpdir.path().read_dir().unwrap().map(|f| f.unwrap()) {
-            let fname = file.file_name();
-            match fname.to_str() {
-                Some("a") => {
-                    assert!(file.file_type().unwrap().is_dir());
-                    assert!(file.metadata().unwrap().is_dir());
-                }
-                Some("b") => {
-                    assert!(file.file_type().unwrap().is_file());
-                    assert!(file.metadata().unwrap().is_file());
-                }
-                f => panic!("unknown file name: {:?}", f),
-            }
-        }
-    }
-
-    #[test]
-    fn dir_entry_debug() {
-        let tmpdir = tmpdir();
-        File::create(&tmpdir.join("b")).unwrap();
-        let mut read_dir = tmpdir.path().read_dir().unwrap();
-        let dir_entry = read_dir.next().unwrap().unwrap();
-        let actual = format!("{:?}", dir_entry);
-        let expected = format!("DirEntry({:?})", dir_entry.0.path());
-        assert_eq!(actual, expected);
-    }
-
-    #[test]
-    fn read_dir_not_found() {
-        let res = fs::read_dir("/path/that/does/not/exist");
-        assert_eq!(res.err().unwrap().kind(), ErrorKind::NotFound);
-    }
-
-    #[test]
-    fn create_dir_all_with_junctions() {
-        let tmpdir = tmpdir();
-        let target = tmpdir.join("target");
-
-        let junction = tmpdir.join("junction");
-        let b = junction.join("a/b");
-
-        let link = tmpdir.join("link");
-        let d = link.join("c/d");
-
-        fs::create_dir(&target).unwrap();
-
-        check!(symlink_junction(&target, &junction));
-        check!(fs::create_dir_all(&b));
-        // the junction itself is not a directory, but `is_dir()` on a Path
-        // follows links
-        assert!(junction.is_dir());
-        assert!(b.exists());
-
-        if !got_symlink_permission(&tmpdir) { return };
-        check!(symlink_dir(&target, &link));
-        check!(fs::create_dir_all(&d));
-        assert!(link.is_dir());
-        assert!(d.exists());
-    }
-
-    #[test]
-    fn metadata_access_times() {
-        let tmpdir = tmpdir();
-
-        let b = tmpdir.join("b");
-        File::create(&b).unwrap();
-
-        let a = check!(fs::metadata(&tmpdir.path()));
-        let b = check!(fs::metadata(&b));
-
-        assert_eq!(check!(a.accessed()), check!(a.accessed()));
-        assert_eq!(check!(a.modified()), check!(a.modified()));
-        assert_eq!(check!(b.accessed()), check!(b.modified()));
-
-        if cfg!(target_os = "macos") || cfg!(target_os = "windows") {
-            check!(a.created());
-            check!(b.created());
-        }
-    }
-}