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

1 files changed, 0 insertions, 945 deletions

diff --git a/ctr-std/src/sys/unix/fs.rs b/ctr-std/src/sys/unix/fs.rs
deleted file mode 100644
index 7a89d98..0000000
--- a/ctr-std/src/sys/unix/fs.rs
+++ /dev/null
@@ -1,945 +0,0 @@
-// Copyright 2013-2014 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.
-
-use os::unix::prelude::*;
-
-use ffi::{CString, CStr, OsString, OsStr};
-use fmt;
-use io::{self, Error, ErrorKind, SeekFrom};
-use libc::{self, c_int, mode_t};
-use mem;
-use path::{Path, PathBuf};
-use ptr;
-use sync::Arc;
-use sys::fd::FileDesc;
-use sys::time::SystemTime;
-use sys::{cvt, cvt_r};
-use sys_common::{AsInner, FromInner};
-
-#[cfg(any(target_os = "linux", target_os = "emscripten", target_os = "l4re"))]
-use libc::{stat64, fstat64, lstat64, off64_t, ftruncate64, lseek64, dirent64, readdir64_r, open64};
-#[cfg(any(target_os = "linux", target_os = "emscripten"))]
-use libc::fstatat64;
-#[cfg(any(target_os = "linux", target_os = "emscripten", target_os = "android"))]
-use libc::dirfd;
-#[cfg(target_os = "android")]
-use libc::{stat as stat64, fstat as fstat64, fstatat as fstatat64, lstat as lstat64, lseek64,
-           dirent as dirent64, open as open64};
-#[cfg(not(any(target_os = "linux",
-              target_os = "emscripten",
-              target_os = "l4re",
-              target_os = "android")))]
-use libc::{stat as stat64, fstat as fstat64, lstat as lstat64, off_t as off64_t,
-           ftruncate as ftruncate64, lseek as lseek64, dirent as dirent64, open as open64};
-#[cfg(not(any(target_os = "linux",
-              target_os = "emscripten",
-              target_os = "solaris",
-              target_os = "l4re",
-              target_os = "fuchsia")))]
-use libc::{readdir_r as readdir64_r};
-
-pub struct File(FileDesc);
-
-#[derive(Clone)]
-pub struct FileAttr {
-    stat: stat64,
-}
-
-// all DirEntry's will have a reference to this struct
-struct InnerReadDir {
-    dirp: Dir,
-    root: PathBuf,
-}
-
-#[derive(Clone)]
-pub struct ReadDir {
-    inner: Arc<InnerReadDir>,
-    end_of_stream: bool,
-}
-
-struct Dir(*mut libc::DIR);
-
-unsafe impl Send for Dir {}
-unsafe impl Sync for Dir {}
-
-pub struct DirEntry {
-    entry: dirent64,
-    dir: ReadDir,
-    // We need to store an owned copy of the entry name
-    // on Solaris and Fuchsia because a) it uses a zero-length
-    // array to store the name, b) its lifetime between readdir
-    // calls is not guaranteed.
-    #[cfg(any(target_os = "solaris", target_os = "fuchsia"))]
-    name: Box<[u8]>
-}
-
-#[derive(Clone, Debug)]
-pub struct OpenOptions {
-    // generic
-    read: bool,
-    write: bool,
-    append: bool,
-    truncate: bool,
-    create: bool,
-    create_new: bool,
-    // system-specific
-    custom_flags: i32,
-    mode: mode_t,
-}
-
-#[derive(Clone, PartialEq, Eq, Debug)]
-pub struct FilePermissions { mode: mode_t }
-
-#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]
-pub struct FileType { mode: mode_t }
-
-#[derive(Debug)]
-pub struct DirBuilder { mode: mode_t }
-
-impl FileAttr {
-    pub fn size(&self) -> u64 { self.stat.st_size as u64 }
-    pub fn perm(&self) -> FilePermissions {
-        FilePermissions { mode: (self.stat.st_mode as mode_t) }
-    }
-
-    pub fn file_type(&self) -> FileType {
-        FileType { mode: self.stat.st_mode as mode_t }
-    }
-}
-
-#[cfg(target_os = "netbsd")]
-impl FileAttr {
-    pub fn modified(&self) -> io::Result<SystemTime> {
-        Ok(SystemTime::from(libc::timespec {
-            tv_sec: self.stat.st_mtime as libc::time_t,
-            tv_nsec: self.stat.st_mtimensec as libc::c_long,
-        }))
-    }
-
-    pub fn accessed(&self) -> io::Result<SystemTime> {
-        Ok(SystemTime::from(libc::timespec {
-            tv_sec: self.stat.st_atime as libc::time_t,
-            tv_nsec: self.stat.st_atimensec as libc::c_long,
-        }))
-    }
-
-    pub fn created(&self) -> io::Result<SystemTime> {
-        Ok(SystemTime::from(libc::timespec {
-            tv_sec: self.stat.st_birthtime as libc::time_t,
-            tv_nsec: self.stat.st_birthtimensec as libc::c_long,
-        }))
-    }
-}
-
-#[cfg(not(target_os = "netbsd"))]
-impl FileAttr {
-    pub fn modified(&self) -> io::Result<SystemTime> {
-        Ok(SystemTime::from(libc::timespec {
-            tv_sec: self.stat.st_mtime as libc::time_t,
-            tv_nsec: self.stat.st_mtime_nsec as _,
-        }))
-    }
-
-    pub fn accessed(&self) -> io::Result<SystemTime> {
-        Ok(SystemTime::from(libc::timespec {
-            tv_sec: self.stat.st_atime as libc::time_t,
-            tv_nsec: self.stat.st_atime_nsec as _,
-        }))
-    }
-
-    #[cfg(any(target_os = "bitrig",
-              target_os = "freebsd",
-              target_os = "openbsd",
-              target_os = "macos",
-              target_os = "ios"))]
-    pub fn created(&self) -> io::Result<SystemTime> {
-        Ok(SystemTime::from(libc::timespec {
-            tv_sec: self.stat.st_birthtime as libc::time_t,
-            tv_nsec: self.stat.st_birthtime_nsec as libc::c_long,
-        }))
-    }
-
-    #[cfg(not(any(target_os = "bitrig",
-                  target_os = "freebsd",
-                  target_os = "openbsd",
-                  target_os = "macos",
-                  target_os = "ios")))]
-    pub fn created(&self) -> io::Result<SystemTime> {
-        Err(io::Error::new(io::ErrorKind::Other,
-                           "creation time is not available on this platform \
-                            currently"))
-    }
-}
-
-impl AsInner<stat64> for FileAttr {
-    fn as_inner(&self) -> &stat64 { &self.stat }
-}
-
-impl FilePermissions {
-    pub fn readonly(&self) -> bool {
-        // check if any class (owner, group, others) has write permission
-        self.mode & 0o222 == 0
-    }
-
-    pub fn set_readonly(&mut self, readonly: bool) {
-        if readonly {
-            // remove write permission for all classes; equivalent to `chmod a-w <file>`
-            self.mode &= !0o222;
-        } else {
-            // add write permission for all classes; equivalent to `chmod a+w <file>`
-            self.mode |= 0o222;
-        }
-    }
-    pub fn mode(&self) -> u32 { self.mode as u32 }
-}
-
-impl FileType {
-    pub fn is_dir(&self) -> bool { self.is(libc::S_IFDIR) }
-    pub fn is_file(&self) -> bool { self.is(libc::S_IFREG) }
-    pub fn is_symlink(&self) -> bool { self.is(libc::S_IFLNK) }
-
-    pub fn is(&self, mode: mode_t) -> bool { self.mode & libc::S_IFMT == mode }
-}
-
-impl FromInner<u32> for FilePermissions {
-    fn from_inner(mode: u32) -> FilePermissions {
-        FilePermissions { mode: mode as mode_t }
-    }
-}
-
-impl fmt::Debug for ReadDir {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        // This will only be called from std::fs::ReadDir, which will add a "ReadDir()" frame.
-        // Thus the result will be e g 'ReadDir("/home")'
-        fmt::Debug::fmt(&*self.inner.root, f)
-    }
-}
-
-impl Iterator for ReadDir {
-    type Item = io::Result<DirEntry>;
-
-    #[cfg(any(target_os = "solaris", target_os = "fuchsia"))]
-    fn next(&mut self) -> Option<io::Result<DirEntry>> {
-        unsafe {
-            loop {
-                // Although readdir_r(3) would be a correct function to use here because
-                // of the thread safety, on Illumos and Fuchsia the readdir(3C) function
-                // is safe to use in threaded applications and it is generally preferred
-                // over the readdir_r(3C) function.
-                super::os::set_errno(0);
-                let entry_ptr = libc::readdir(self.inner.dirp.0);
-                if entry_ptr.is_null() {
-                    // NULL can mean either the end is reached or an error occurred.
-                    // So we had to clear errno beforehand to check for an error now.
-                    return match super::os::errno() {
-                        0 => None,
-                        e => Some(Err(Error::from_raw_os_error(e))),
-                    }
-                }
-
-                let name = (*entry_ptr).d_name.as_ptr();
-                let namelen = libc::strlen(name) as usize;
-
-                let ret = DirEntry {
-                    entry: *entry_ptr,
-                    name: ::slice::from_raw_parts(name as *const u8,
-                                                  namelen as usize).to_owned().into_boxed_slice(),
-                    dir: self.clone()
-                };
-                if ret.name_bytes() != b"." && ret.name_bytes() != b".." {
-                    return Some(Ok(ret))
-                }
-            }
-        }
-    }
-
-    #[cfg(not(any(target_os = "solaris", target_os = "fuchsia")))]
-    fn next(&mut self) -> Option<io::Result<DirEntry>> {
-        if self.end_of_stream {
-            return None;
-        }
-
-        unsafe {
-            let mut ret = DirEntry {
-                entry: mem::zeroed(),
-                dir: self.clone(),
-            };
-            let mut entry_ptr = ptr::null_mut();
-            loop {
-                if readdir64_r(self.inner.dirp.0, &mut ret.entry, &mut entry_ptr) != 0 {
-                    if entry_ptr.is_null() {
-                        // We encountered an error (which will be returned in this iteration), but
-                        // we also reached the end of the directory stream. The `end_of_stream`
-                        // flag is enabled to make sure that we return `None` in the next iteration
-                        // (instead of looping forever)
-                        self.end_of_stream = true;
-                    }
-                    return Some(Err(Error::last_os_error()))
-                }
-                if entry_ptr.is_null() {
-                    return None
-                }
-                if ret.name_bytes() != b"." && ret.name_bytes() != b".." {
-                    return Some(Ok(ret))
-                }
-            }
-        }
-    }
-}
-
-impl Drop for Dir {
-    fn drop(&mut self) {
-        let r = unsafe { libc::closedir(self.0) };
-        debug_assert_eq!(r, 0);
-    }
-}
-
-impl DirEntry {
-    pub fn path(&self) -> PathBuf {
-        self.dir.inner.root.join(OsStr::from_bytes(self.name_bytes()))
-    }
-
-    pub fn file_name(&self) -> OsString {
-        OsStr::from_bytes(self.name_bytes()).to_os_string()
-    }
-
-    #[cfg(any(target_os = "linux", target_os = "emscripten", target_os = "android"))]
-    pub fn metadata(&self) -> io::Result<FileAttr> {
-        let fd = cvt(unsafe {dirfd(self.dir.inner.dirp.0)})?;
-        let mut stat: stat64 = unsafe { mem::zeroed() };
-        cvt(unsafe {
-            fstatat64(fd, self.entry.d_name.as_ptr(), &mut stat, libc::AT_SYMLINK_NOFOLLOW)
-        })?;
-        Ok(FileAttr { stat: stat })
-    }
-
-    #[cfg(not(any(target_os = "linux", target_os = "emscripten", target_os = "android")))]
-    pub fn metadata(&self) -> io::Result<FileAttr> {
-        lstat(&self.path())
-    }
-
-    #[cfg(any(target_os = "solaris", target_os = "haiku", target_os = "hermit"))]
-    pub fn file_type(&self) -> io::Result<FileType> {
-        lstat(&self.path()).map(|m| m.file_type())
-    }
-
-    #[cfg(not(any(target_os = "solaris", target_os = "haiku", target_os = "hermit")))]
-    pub fn file_type(&self) -> io::Result<FileType> {
-        match self.entry.d_type {
-            libc::DT_CHR => Ok(FileType { mode: libc::S_IFCHR }),
-            libc::DT_FIFO => Ok(FileType { mode: libc::S_IFIFO }),
-            libc::DT_LNK => Ok(FileType { mode: libc::S_IFLNK }),
-            libc::DT_REG => Ok(FileType { mode: libc::S_IFREG }),
-            libc::DT_SOCK => Ok(FileType { mode: libc::S_IFSOCK }),
-            libc::DT_DIR => Ok(FileType { mode: libc::S_IFDIR }),
-            libc::DT_BLK => Ok(FileType { mode: libc::S_IFBLK }),
-            _ => lstat(&self.path()).map(|m| m.file_type()),
-        }
-    }
-
-    #[cfg(any(target_os = "macos",
-              target_os = "ios",
-              target_os = "linux",
-              target_os = "emscripten",
-              target_os = "android",
-              target_os = "solaris",
-              target_os = "haiku",
-              target_os = "l4re",
-              target_os = "fuchsia",
-              target_os = "hermit"))]
-    pub fn ino(&self) -> u64 {
-        self.entry.d_ino as u64
-    }
-
-    #[cfg(any(target_os = "freebsd",
-              target_os = "openbsd",
-              target_os = "bitrig",
-              target_os = "netbsd",
-              target_os = "dragonfly"))]
-    pub fn ino(&self) -> u64 {
-        self.entry.d_fileno as u64
-    }
-
-    #[cfg(any(target_os = "macos",
-              target_os = "ios",
-              target_os = "netbsd",
-              target_os = "openbsd",
-              target_os = "freebsd",
-              target_os = "dragonfly",
-              target_os = "bitrig"))]
-    fn name_bytes(&self) -> &[u8] {
-        unsafe {
-            ::slice::from_raw_parts(self.entry.d_name.as_ptr() as *const u8,
-                                    self.entry.d_namlen as usize)
-        }
-    }
-    #[cfg(any(target_os = "android",
-              target_os = "linux",
-              target_os = "emscripten",
-              target_os = "l4re",
-              target_os = "haiku",
-              target_os = "hermit"))]
-    fn name_bytes(&self) -> &[u8] {
-        unsafe {
-            CStr::from_ptr(self.entry.d_name.as_ptr()).to_bytes()
-        }
-    }
-    #[cfg(any(target_os = "solaris",
-              target_os = "fuchsia"))]
-    fn name_bytes(&self) -> &[u8] {
-        &*self.name
-    }
-}
-
-impl OpenOptions {
-    pub fn new() -> OpenOptions {
-        OpenOptions {
-            // generic
-            read: false,
-            write: false,
-            append: false,
-            truncate: false,
-            create: false,
-            create_new: false,
-            // system-specific
-            custom_flags: 0,
-            mode: 0o666,
-        }
-    }
-
-    pub fn read(&mut self, read: bool) { self.read = read; }
-    pub fn write(&mut self, write: bool) { self.write = write; }
-    pub fn append(&mut self, append: bool) { self.append = append; }
-    pub fn truncate(&mut self, truncate: bool) { self.truncate = truncate; }
-    pub fn create(&mut self, create: bool) { self.create = create; }
-    pub fn create_new(&mut self, create_new: bool) { self.create_new = create_new; }
-
-    pub fn custom_flags(&mut self, flags: i32) { self.custom_flags = flags; }
-    pub fn mode(&mut self, mode: u32) { self.mode = mode as mode_t; }
-
-    fn get_access_mode(&self) -> io::Result<c_int> {
-        match (self.read, self.write, self.append) {
-            (true,  false, false) => Ok(libc::O_RDONLY),
-            (false, true,  false) => Ok(libc::O_WRONLY),
-            (true,  true,  false) => Ok(libc::O_RDWR),
-            (false, _,     true)  => Ok(libc::O_WRONLY | libc::O_APPEND),
-            (true,  _,     true)  => Ok(libc::O_RDWR | libc::O_APPEND),
-            (false, false, false) => Err(Error::from_raw_os_error(libc::EINVAL)),
-        }
-    }
-
-    fn get_creation_mode(&self) -> io::Result<c_int> {
-        match (self.write, self.append) {
-            (true, false) => {}
-            (false, false) =>
-                if self.truncate || self.create || self.create_new {
-                    return Err(Error::from_raw_os_error(libc::EINVAL));
-                },
-            (_, true) =>
-                if self.truncate && !self.create_new {
-                    return Err(Error::from_raw_os_error(libc::EINVAL));
-                },
-        }
-
-        Ok(match (self.create, self.truncate, self.create_new) {
-                (false, false, false) => 0,
-                (true,  false, false) => libc::O_CREAT,
-                (false, true,  false) => libc::O_TRUNC,
-                (true,  true,  false) => libc::O_CREAT | libc::O_TRUNC,
-                (_,      _,    true)  => libc::O_CREAT | libc::O_EXCL,
-           })
-    }
-}
-
-impl File {
-    pub fn open(path: &Path, opts: &OpenOptions) -> io::Result<File> {
-        let path = cstr(path)?;
-        File::open_c(&path, opts)
-    }
-
-    pub fn open_c(path: &CStr, opts: &OpenOptions) -> io::Result<File> {
-        let flags = libc::O_CLOEXEC |
-                    opts.get_access_mode()? |
-                    opts.get_creation_mode()? |
-                    (opts.custom_flags as c_int & !libc::O_ACCMODE);
-        let fd = cvt_r(|| unsafe {
-            open64(path.as_ptr(), flags, opts.mode as c_int)
-        })?;
-        let fd = FileDesc::new(fd);
-
-        // Currently the standard library supports Linux 2.6.18 which did not
-        // have the O_CLOEXEC flag (passed above). If we're running on an older
-        // Linux kernel then the flag is just ignored by the OS. After we open
-        // the first file, we check whether it has CLOEXEC set. If it doesn't,
-        // we will explicitly ask for a CLOEXEC fd for every further file we
-        // open, if it does, we will skip that step.
-        //
-        // The CLOEXEC flag, however, is supported on versions of macOS/BSD/etc
-        // that we support, so we only do this on Linux currently.
-        #[cfg(target_os = "linux")]
-        fn ensure_cloexec(fd: &FileDesc) -> io::Result<()> {
-            use sync::atomic::{AtomicUsize, Ordering};
-
-            const OPEN_CLOEXEC_UNKNOWN: usize = 0;
-            const OPEN_CLOEXEC_SUPPORTED: usize = 1;
-            const OPEN_CLOEXEC_NOTSUPPORTED: usize = 2;
-            static OPEN_CLOEXEC: AtomicUsize = AtomicUsize::new(OPEN_CLOEXEC_UNKNOWN);
-
-            let need_to_set;
-            match OPEN_CLOEXEC.load(Ordering::Relaxed) {
-                OPEN_CLOEXEC_UNKNOWN => {
-                    need_to_set = !fd.get_cloexec()?;
-                    OPEN_CLOEXEC.store(if need_to_set {
-                        OPEN_CLOEXEC_NOTSUPPORTED
-                    } else {
-                        OPEN_CLOEXEC_SUPPORTED
-                    }, Ordering::Relaxed);
-                },
-                OPEN_CLOEXEC_SUPPORTED => need_to_set = false,
-                OPEN_CLOEXEC_NOTSUPPORTED => need_to_set = true,
-                _ => unreachable!(),
-            }
-            if need_to_set {
-                fd.set_cloexec()?;
-            }
-            Ok(())
-        }
-
-        #[cfg(not(target_os = "linux"))]
-        fn ensure_cloexec(_: &FileDesc) -> io::Result<()> {
-            Ok(())
-        }
-
-        ensure_cloexec(&fd)?;
-        Ok(File(fd))
-    }
-
-    pub fn file_attr(&self) -> io::Result<FileAttr> {
-        let mut stat: stat64 = unsafe { mem::zeroed() };
-        cvt(unsafe {
-            fstat64(self.0.raw(), &mut stat)
-        })?;
-        Ok(FileAttr { stat: stat })
-    }
-
-    pub fn fsync(&self) -> io::Result<()> {
-        cvt_r(|| unsafe { libc::fsync(self.0.raw()) })?;
-        Ok(())
-    }
-
-    pub fn datasync(&self) -> io::Result<()> {
-        cvt_r(|| unsafe { os_datasync(self.0.raw()) })?;
-        return Ok(());
-
-        #[cfg(any(target_os = "macos", target_os = "ios"))]
-        unsafe fn os_datasync(fd: c_int) -> c_int {
-            libc::fcntl(fd, libc::F_FULLFSYNC)
-        }
-        #[cfg(target_os = "linux")]
-        unsafe fn os_datasync(fd: c_int) -> c_int { libc::fdatasync(fd) }
-        #[cfg(not(any(target_os = "macos",
-                      target_os = "ios",
-                      target_os = "linux")))]
-        unsafe fn os_datasync(fd: c_int) -> c_int { libc::fsync(fd) }
-    }
-
-    pub fn truncate(&self, size: u64) -> io::Result<()> {
-        #[cfg(target_os = "android")]
-        return ::sys::android::ftruncate64(self.0.raw(), size);
-
-        #[cfg(not(target_os = "android"))]
-        return cvt_r(|| unsafe {
-            ftruncate64(self.0.raw(), size as off64_t)
-        }).map(|_| ());
-    }
-
-    pub fn read(&self, buf: &mut [u8]) -> io::Result<usize> {
-        self.0.read(buf)
-    }
-
-    pub fn read_at(&self, buf: &mut [u8], offset: u64) -> io::Result<usize> {
-        self.0.read_at(buf, offset)
-    }
-
-    pub fn write(&self, buf: &[u8]) -> io::Result<usize> {
-        self.0.write(buf)
-    }
-
-    pub fn write_at(&self, buf: &[u8], offset: u64) -> io::Result<usize> {
-        self.0.write_at(buf, offset)
-    }
-
-    pub fn flush(&self) -> io::Result<()> { Ok(()) }
-
-    pub fn seek(&self, pos: SeekFrom) -> io::Result<u64> {
-        let (whence, pos) = match pos {
-            // Casting to `i64` is fine, too large values will end up as
-            // negative which will cause an error in `lseek64`.
-            SeekFrom::Start(off) => (libc::SEEK_SET, off as i64),
-            SeekFrom::End(off) => (libc::SEEK_END, off),
-            SeekFrom::Current(off) => (libc::SEEK_CUR, off),
-        };
-        #[cfg(target_os = "emscripten")]
-        let pos = pos as i32;
-        let n = cvt(unsafe { lseek64(self.0.raw(), pos, whence) })?;
-        Ok(n as u64)
-    }
-
-    pub fn duplicate(&self) -> io::Result<File> {
-        self.0.duplicate().map(File)
-    }
-
-    pub fn fd(&self) -> &FileDesc { &self.0 }
-
-    pub fn into_fd(self) -> FileDesc { self.0 }
-
-    pub fn set_permissions(&self, perm: FilePermissions) -> io::Result<()> {
-        cvt_r(|| unsafe { libc::fchmod(self.0.raw(), perm.mode) })?;
-        Ok(())
-    }
-}
-
-impl DirBuilder {
-    pub fn new() -> DirBuilder {
-        DirBuilder { mode: 0o777 }
-    }
-
-    pub fn mkdir(&self, p: &Path) -> io::Result<()> {
-        let p = cstr(p)?;
-        cvt(unsafe { libc::mkdir(p.as_ptr(), self.mode) })?;
-        Ok(())
-    }
-
-    pub fn set_mode(&mut self, mode: u32) {
-        self.mode = mode as mode_t;
-    }
-}
-
-fn cstr(path: &Path) -> io::Result<CString> {
-    Ok(CString::new(path.as_os_str().as_bytes())?)
-}
-
-impl FromInner<c_int> for File {
-    fn from_inner(fd: c_int) -> File {
-        File(FileDesc::new(fd))
-    }
-}
-
-impl fmt::Debug for File {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        #[cfg(target_os = "linux")]
-        fn get_path(fd: c_int) -> Option<PathBuf> {
-            let mut p = PathBuf::from("/proc/self/fd");
-            p.push(&fd.to_string());
-            readlink(&p).ok()
-        }
-
-        #[cfg(target_os = "macos")]
-        fn get_path(fd: c_int) -> Option<PathBuf> {
-            // FIXME: The use of PATH_MAX is generally not encouraged, but it
-            // is inevitable in this case because macOS defines `fcntl` with
-            // `F_GETPATH` in terms of `MAXPATHLEN`, and there are no
-            // alternatives. If a better method is invented, it should be used
-            // instead.
-            let mut buf = vec![0;libc::PATH_MAX as usize];
-            let n = unsafe { libc::fcntl(fd, libc::F_GETPATH, buf.as_ptr()) };
-            if n == -1 {
-                return None;
-            }
-            let l = buf.iter().position(|&c| c == 0).unwrap();
-            buf.truncate(l as usize);
-            buf.shrink_to_fit();
-            Some(PathBuf::from(OsString::from_vec(buf)))
-        }
-
-        #[cfg(not(any(target_os = "linux", target_os = "macos")))]
-        fn get_path(_fd: c_int) -> Option<PathBuf> {
-            // FIXME(#24570): implement this for other Unix platforms
-            None
-        }
-
-        #[cfg(any(target_os = "linux", target_os = "macos"))]
-        fn get_mode(fd: c_int) -> Option<(bool, bool)> {
-            let mode = unsafe { libc::fcntl(fd, libc::F_GETFL) };
-            if mode == -1 {
-                return None;
-            }
-            match mode & libc::O_ACCMODE {
-                libc::O_RDONLY => Some((true, false)),
-                libc::O_RDWR => Some((true, true)),
-                libc::O_WRONLY => Some((false, true)),
-                _ => None
-            }
-        }
-
-        #[cfg(not(any(target_os = "linux", target_os = "macos")))]
-        fn get_mode(_fd: c_int) -> Option<(bool, bool)> {
-            // FIXME(#24570): implement this for other Unix platforms
-            None
-        }
-
-        let fd = self.0.raw();
-        let mut b = f.debug_struct("File");
-        b.field("fd", &fd);
-        if let Some(path) = get_path(fd) {
-            b.field("path", &path);
-        }
-        if let Some((read, write)) = get_mode(fd) {
-            b.field("read", &read).field("write", &write);
-        }
-        b.finish()
-    }
-}
-
-pub fn readdir(p: &Path) -> io::Result<ReadDir> {
-    let root = p.to_path_buf();
-    let p = cstr(p)?;
-    unsafe {
-        let ptr = libc::opendir(p.as_ptr());
-        if ptr.is_null() {
-            Err(Error::last_os_error())
-        } else {
-            let inner = InnerReadDir { dirp: Dir(ptr), root };
-            Ok(ReadDir{
-                inner: Arc::new(inner),
-                end_of_stream: false,
-            })
-        }
-    }
-}
-
-pub fn unlink(p: &Path) -> io::Result<()> {
-    let p = cstr(p)?;
-    cvt(unsafe { libc::unlink(p.as_ptr()) })?;
-    Ok(())
-}
-
-pub fn rename(old: &Path, new: &Path) -> io::Result<()> {
-    let old = cstr(old)?;
-    let new = cstr(new)?;
-    cvt(unsafe { libc::rename(old.as_ptr(), new.as_ptr()) })?;
-    Ok(())
-}
-
-pub fn set_perm(p: &Path, perm: FilePermissions) -> io::Result<()> {
-    let p = cstr(p)?;
-    cvt_r(|| unsafe { libc::chmod(p.as_ptr(), perm.mode) })?;
-    Ok(())
-}
-
-pub fn rmdir(p: &Path) -> io::Result<()> {
-    let p = cstr(p)?;
-    cvt(unsafe { libc::rmdir(p.as_ptr()) })?;
-    Ok(())
-}
-
-pub fn remove_dir_all(path: &Path) -> io::Result<()> {
-    let filetype = lstat(path)?.file_type();
-    if filetype.is_symlink() {
-        unlink(path)
-    } else {
-        remove_dir_all_recursive(path)
-    }
-}
-
-fn remove_dir_all_recursive(path: &Path) -> io::Result<()> {
-    for child in readdir(path)? {
-        let child = child?;
-        if child.file_type()?.is_dir() {
-            remove_dir_all_recursive(&child.path())?;
-        } else {
-            unlink(&child.path())?;
-        }
-    }
-    rmdir(path)
-}
-
-pub fn readlink(p: &Path) -> io::Result<PathBuf> {
-    let c_path = cstr(p)?;
-    let p = c_path.as_ptr();
-
-    let mut buf = Vec::with_capacity(256);
-
-    loop {
-        let buf_read = cvt(unsafe {
-            libc::readlink(p, buf.as_mut_ptr() as *mut _, buf.capacity())
-        })? as usize;
-
-        unsafe { buf.set_len(buf_read); }
-
-        if buf_read != buf.capacity() {
-            buf.shrink_to_fit();
-
-            return Ok(PathBuf::from(OsString::from_vec(buf)));
-        }
-
-        // Trigger the internal buffer resizing logic of `Vec` by requiring
-        // more space than the current capacity. The length is guaranteed to be
-        // the same as the capacity due to the if statement above.
-        buf.reserve(1);
-    }
-}
-
-pub fn symlink(src: &Path, dst: &Path) -> io::Result<()> {
-    let src = cstr(src)?;
-    let dst = cstr(dst)?;
-    cvt(unsafe { libc::symlink(src.as_ptr(), dst.as_ptr()) })?;
-    Ok(())
-}
-
-pub fn link(src: &Path, dst: &Path) -> io::Result<()> {
-    let src = cstr(src)?;
-    let dst = cstr(dst)?;
-    cvt(unsafe { libc::link(src.as_ptr(), dst.as_ptr()) })?;
-    Ok(())
-}
-
-pub fn stat(p: &Path) -> io::Result<FileAttr> {
-    let p = cstr(p)?;
-    let mut stat: stat64 = unsafe { mem::zeroed() };
-    cvt(unsafe {
-        stat64(p.as_ptr(), &mut stat)
-    })?;
-    Ok(FileAttr { stat: stat })
-}
-
-pub fn lstat(p: &Path) -> io::Result<FileAttr> {
-    let p = cstr(p)?;
-    let mut stat: stat64 = unsafe { mem::zeroed() };
-    cvt(unsafe {
-        lstat64(p.as_ptr(), &mut stat)
-    })?;
-    Ok(FileAttr { stat: stat })
-}
-
-pub fn canonicalize(p: &Path) -> io::Result<PathBuf> {
-    let path = CString::new(p.as_os_str().as_bytes())?;
-    let buf;
-    unsafe {
-        let r = libc::realpath(path.as_ptr(), ptr::null_mut());
-        if r.is_null() {
-            return Err(io::Error::last_os_error())
-        }
-        buf = CStr::from_ptr(r).to_bytes().to_vec();
-        libc::free(r as *mut _);
-    }
-    Ok(PathBuf::from(OsString::from_vec(buf)))
-}
-
-#[cfg(not(any(target_os = "linux", target_os = "android")))]
-pub fn copy(from: &Path, to: &Path) -> io::Result<u64> {
-    use fs::File;
-    if !from.is_file() {
-        return Err(Error::new(ErrorKind::InvalidInput,
-                              "the source path is not an existing regular file"))
-    }
-
-    let mut reader = File::open(from)?;
-    let mut writer = File::create(to)?;
-    let perm = reader.metadata()?.permissions();
-
-    let ret = io::copy(&mut reader, &mut writer)?;
-    writer.set_permissions(perm)?;
-    Ok(ret)
-}
-
-#[cfg(any(target_os = "linux", target_os = "android"))]
-pub fn copy(from: &Path, to: &Path) -> io::Result<u64> {
-    use cmp;
-    use fs::File;
-    use sync::atomic::{AtomicBool, Ordering};
-
-    // Kernel prior to 4.5 don't have copy_file_range
-    // We store the availability in a global to avoid unneccessary syscalls
-    static HAS_COPY_FILE_RANGE: AtomicBool = AtomicBool::new(true);
-
-    unsafe fn copy_file_range(
-        fd_in: libc::c_int,
-        off_in: *mut libc::loff_t,
-        fd_out: libc::c_int,
-        off_out: *mut libc::loff_t,
-        len: libc::size_t,
-        flags: libc::c_uint,
-    ) -> libc::c_long {
-        libc::syscall(
-            libc::SYS_copy_file_range,
-            fd_in,
-            off_in,
-            fd_out,
-            off_out,
-            len,
-            flags,
-        )
-    }
-
-    if !from.is_file() {
-        return Err(Error::new(ErrorKind::InvalidInput,
-                              "the source path is not an existing regular file"))
-    }
-
-    let mut reader = File::open(from)?;
-    let mut writer = File::create(to)?;
-    let (perm, len) = {
-        let metadata = reader.metadata()?;
-        (metadata.permissions(), metadata.size())
-    };
-
-    let has_copy_file_range = HAS_COPY_FILE_RANGE.load(Ordering::Relaxed);
-    let mut written = 0u64;
-    while written < len {
-        let copy_result = if has_copy_file_range {
-            let bytes_to_copy = cmp::min(len - written, usize::max_value() as u64) as usize;
-            let copy_result = unsafe {
-                // We actually don't have to adjust the offsets,
-                // because copy_file_range adjusts the file offset automatically
-                cvt(copy_file_range(reader.as_raw_fd(),
-                                    ptr::null_mut(),
-                                    writer.as_raw_fd(),
-                                    ptr::null_mut(),
-                                    bytes_to_copy,
-                                    0)
-                    )
-            };
-            if let Err(ref copy_err) = copy_result {
-                match copy_err.raw_os_error() {
-                    Some(libc::ENOSYS) | Some(libc::EPERM) => {
-                        HAS_COPY_FILE_RANGE.store(false, Ordering::Relaxed);
-                    }
-                    _ => {}
-                }
-            }
-            copy_result
-        } else {
-            Err(io::Error::from_raw_os_error(libc::ENOSYS))
-        };
-        match copy_result {
-            Ok(ret) => written += ret as u64,
-            Err(err) => {
-                match err.raw_os_error() {
-                    Some(os_err) if os_err == libc::ENOSYS
-                                 || os_err == libc::EXDEV
-                                 || os_err == libc::EPERM => {
-                        // Try fallback io::copy if either:
-                        // - Kernel version is < 4.5 (ENOSYS)
-                        // - Files are mounted on different fs (EXDEV)
-                        // - copy_file_range is disallowed, for example by seccomp (EPERM)
-                        assert_eq!(written, 0);
-                        let ret = io::copy(&mut reader, &mut writer)?;
-                        writer.set_permissions(perm)?;
-                        return Ok(ret)
-                    },
-                    _ => return Err(err),
-                }
-            }
-        }
-    }
-    writer.set_permissions(perm)?;
-    Ok(written)
-}