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-rw-r--r--ctr-std/src/sys/unix/fd.rs288
1 files changed, 0 insertions, 288 deletions
diff --git a/ctr-std/src/sys/unix/fd.rs b/ctr-std/src/sys/unix/fd.rs
deleted file mode 100644
index 4830e38..0000000
--- a/ctr-std/src/sys/unix/fd.rs
+++ /dev/null
@@ -1,288 +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.
-
-#![unstable(reason = "not public", issue = "0", feature = "fd")]
-
-use cmp;
-use io::{self, Read};
-use libc::{self, c_int, c_void, ssize_t};
-use mem;
-use sync::atomic::{AtomicBool, Ordering};
-use sys::cvt;
-use sys_common::AsInner;
-
-#[derive(Debug)]
-pub struct FileDesc {
- fd: c_int,
-}
-
-fn max_len() -> usize {
- // The maximum read limit on most posix-like systems is `SSIZE_MAX`,
- // with the man page quoting that if the count of bytes to read is
- // greater than `SSIZE_MAX` the result is "unspecified".
- //
- // On macOS, however, apparently the 64-bit libc is either buggy or
- // intentionally showing odd behavior by rejecting any read with a size
- // larger than or equal to INT_MAX. To handle both of these the read
- // size is capped on both platforms.
- if cfg!(target_os = "macos") {
- <c_int>::max_value() as usize - 1
- } else {
- <ssize_t>::max_value() as usize
- }
-}
-
-impl FileDesc {
- pub fn new(fd: c_int) -> FileDesc {
- FileDesc { fd: fd }
- }
-
- pub fn raw(&self) -> c_int { self.fd }
-
- /// Extracts the actual filedescriptor without closing it.
- pub fn into_raw(self) -> c_int {
- let fd = self.fd;
- mem::forget(self);
- fd
- }
-
- pub fn read(&self, buf: &mut [u8]) -> io::Result<usize> {
- let ret = cvt(unsafe {
- libc::read(self.fd,
- buf.as_mut_ptr() as *mut c_void,
- cmp::min(buf.len(), max_len()))
- })?;
- Ok(ret as usize)
- }
-
- pub fn read_to_end(&self, buf: &mut Vec<u8>) -> io::Result<usize> {
- let mut me = self;
- (&mut me).read_to_end(buf)
- }
-
- pub fn read_at(&self, buf: &mut [u8], offset: u64) -> io::Result<usize> {
- #[cfg(target_os = "android")]
- use super::android::cvt_pread64;
-
- #[cfg(target_os = "emscripten")]
- unsafe fn cvt_pread64(fd: c_int, buf: *mut c_void, count: usize, offset: i64)
- -> io::Result<isize>
- {
- use convert::TryInto;
- use libc::pread64;
- // pread64 on emscripten actually takes a 32 bit offset
- if let Ok(o) = offset.try_into() {
- cvt(pread64(fd, buf, count, o))
- } else {
- Err(io::Error::new(io::ErrorKind::InvalidInput,
- "cannot pread >2GB"))
- }
- }
-
- #[cfg(not(any(target_os = "android", target_os = "emscripten")))]
- unsafe fn cvt_pread64(fd: c_int, buf: *mut c_void, count: usize, offset: i64)
- -> io::Result<isize>
- {
- #[cfg(target_os = "linux")]
- use libc::pread64;
- #[cfg(not(target_os = "linux"))]
- use libc::pread as pread64;
- cvt(pread64(fd, buf, count, offset))
- }
-
- unsafe {
- cvt_pread64(self.fd,
- buf.as_mut_ptr() as *mut c_void,
- cmp::min(buf.len(), max_len()),
- offset as i64)
- .map(|n| n as usize)
- }
- }
-
- pub fn write(&self, buf: &[u8]) -> io::Result<usize> {
- let ret = cvt(unsafe {
- libc::write(self.fd,
- buf.as_ptr() as *const c_void,
- cmp::min(buf.len(), max_len()))
- })?;
- Ok(ret as usize)
- }
-
- pub fn write_at(&self, buf: &[u8], offset: u64) -> io::Result<usize> {
- #[cfg(target_os = "android")]
- use super::android::cvt_pwrite64;
-
- #[cfg(target_os = "emscripten")]
- unsafe fn cvt_pwrite64(fd: c_int, buf: *const c_void, count: usize, offset: i64)
- -> io::Result<isize>
- {
- use convert::TryInto;
- use libc::pwrite64;
- // pwrite64 on emscripten actually takes a 32 bit offset
- if let Ok(o) = offset.try_into() {
- cvt(pwrite64(fd, buf, count, o))
- } else {
- Err(io::Error::new(io::ErrorKind::InvalidInput,
- "cannot pwrite >2GB"))
- }
- }
-
- #[cfg(not(any(target_os = "android", target_os = "emscripten")))]
- unsafe fn cvt_pwrite64(fd: c_int, buf: *const c_void, count: usize, offset: i64)
- -> io::Result<isize>
- {
- #[cfg(target_os = "linux")]
- use libc::pwrite64;
- #[cfg(not(target_os = "linux"))]
- use libc::pwrite as pwrite64;
- cvt(pwrite64(fd, buf, count, offset))
- }
-
- unsafe {
- cvt_pwrite64(self.fd,
- buf.as_ptr() as *const c_void,
- cmp::min(buf.len(), max_len()),
- offset as i64)
- .map(|n| n as usize)
- }
- }
-
- #[cfg(target_os = "linux")]
- pub fn get_cloexec(&self) -> io::Result<bool> {
- unsafe {
- Ok((cvt(libc::fcntl(self.fd, libc::F_GETFD))? & libc::FD_CLOEXEC) != 0)
- }
- }
-
- #[cfg(not(any(target_env = "newlib",
- target_os = "solaris",
- target_os = "emscripten",
- target_os = "fuchsia",
- target_os = "l4re",
- target_os = "haiku")))]
- pub fn set_cloexec(&self) -> io::Result<()> {
- unsafe {
- cvt(libc::ioctl(self.fd, libc::FIOCLEX))?;
- Ok(())
- }
- }
- #[cfg(any(target_env = "newlib",
- target_os = "solaris",
- target_os = "emscripten",
- target_os = "fuchsia",
- target_os = "l4re",
- target_os = "haiku"))]
- pub fn set_cloexec(&self) -> io::Result<()> {
- unsafe {
- let previous = cvt(libc::fcntl(self.fd, libc::F_GETFD))?;
- let new = previous | libc::FD_CLOEXEC;
- if new != previous {
- cvt(libc::fcntl(self.fd, libc::F_SETFD, new))?;
- }
- Ok(())
- }
- }
-
- #[cfg(target_os = "linux")]
- pub fn set_nonblocking(&self, nonblocking: bool) -> io::Result<()> {
- unsafe {
- let v = nonblocking as c_int;
- cvt(libc::ioctl(self.fd, libc::FIONBIO, &v))?;
- Ok(())
- }
- }
-
- #[cfg(not(target_os = "linux"))]
- pub fn set_nonblocking(&self, nonblocking: bool) -> io::Result<()> {
- unsafe {
- let previous = cvt(libc::fcntl(self.fd, libc::F_GETFL))?;
- let new = if nonblocking {
- previous | libc::O_NONBLOCK
- } else {
- previous & !libc::O_NONBLOCK
- };
- if new != previous {
- cvt(libc::fcntl(self.fd, libc::F_SETFL, new))?;
- }
- Ok(())
- }
- }
-
- pub fn duplicate(&self) -> io::Result<FileDesc> {
- // We want to atomically duplicate this file descriptor and set the
- // CLOEXEC flag, and currently that's done via F_DUPFD_CLOEXEC. This
- // flag, however, isn't supported on older Linux kernels (earlier than
- // 2.6.24).
- //
- // To detect this and ensure that CLOEXEC is still set, we
- // follow a strategy similar to musl [1] where if passing
- // F_DUPFD_CLOEXEC causes `fcntl` to return EINVAL it means it's not
- // supported (the third parameter, 0, is always valid), so we stop
- // trying that.
- //
- // Also note that Android doesn't have F_DUPFD_CLOEXEC, but get it to
- // resolve so we at least compile this.
- //
- // [1]: http://comments.gmane.org/gmane.linux.lib.musl.general/2963
- #[cfg(any(target_os = "android", target_os = "haiku"))]
- use libc::F_DUPFD as F_DUPFD_CLOEXEC;
- #[cfg(not(any(target_os = "android", target_os="haiku")))]
- use libc::F_DUPFD_CLOEXEC;
-
- let make_filedesc = |fd| {
- let fd = FileDesc::new(fd);
- fd.set_cloexec()?;
- Ok(fd)
- };
- static TRY_CLOEXEC: AtomicBool =
- AtomicBool::new(!cfg!(target_os = "android"));
- let fd = self.raw();
- if TRY_CLOEXEC.load(Ordering::Relaxed) {
- match cvt(unsafe { libc::fcntl(fd, F_DUPFD_CLOEXEC, 0) }) {
- // We *still* call the `set_cloexec` method as apparently some
- // linux kernel at some point stopped setting CLOEXEC even
- // though it reported doing so on F_DUPFD_CLOEXEC.
- Ok(fd) => {
- return Ok(if cfg!(target_os = "linux") {
- make_filedesc(fd)?
- } else {
- FileDesc::new(fd)
- })
- }
- Err(ref e) if e.raw_os_error() == Some(libc::EINVAL) => {
- TRY_CLOEXEC.store(false, Ordering::Relaxed);
- }
- Err(e) => return Err(e),
- }
- }
- cvt(unsafe { libc::fcntl(fd, libc::F_DUPFD, 0) }).and_then(make_filedesc)
- }
-}
-
-impl<'a> Read for &'a FileDesc {
- fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
- (**self).read(buf)
- }
-}
-
-impl AsInner<c_int> for FileDesc {
- fn as_inner(&self) -> &c_int { &self.fd }
-}
-
-impl Drop for FileDesc {
- fn drop(&mut self) {
- // Note that errors are ignored when closing a file descriptor. The
- // reason for this is that if an error occurs we don't actually know if
- // the file descriptor was closed or not, and if we retried (for
- // something like EINTR), we might close another valid file descriptor
- // (opened after we closed ours.
- let _ = unsafe { libc::close(self.fd) };
- }
-}
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