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    // 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.

    use io;
    use libc;
    use sys::fd::FileDesc;

    pub struct Stdin(());
    pub struct Stdout(());
    pub struct Stderr(());

    impl Stdin {
        pub fn new() -> io::Result<Stdin> { Ok(Stdin(())) }

        pub fn read(&self, data: &mut [u8]) -> io::Result<usize> {
            let fd = FileDesc::new(libc::STDIN_FILENO);
            let ret = fd.read(data);
            fd.into_raw();
            ret
        }
    }

    impl Stdout {
        pub fn new() -> io::Result<Stdout> { Ok(Stdout(())) }

        pub fn write(&self, data: &[u8]) -> io::Result<usize> {
            let fd = FileDesc::new(libc::STDOUT_FILENO);
            let ret = fd.write(data);
            fd.into_raw();
            ret
        }

        pub fn flush(&self) -> io::Result<()> {
            Ok(())
        }
    }

    impl Stderr {
        pub fn new() -> io::Result<Stderr> { Ok(Stderr(())) }

        pub fn write(&self, data: &[u8]) -> io::Result<usize> {
            let fd = FileDesc::new(libc::STDERR_FILENO);
            let ret = fd.write(data);
            fd.into_raw();
            ret
        }

        pub fn flush(&self) -> io::Result<()> {
            Ok(())
        }
    }

    // FIXME: right now this raw stderr handle is used in a few places because
    //        std::io::stderr_raw isn't exposed, but once that's exposed this impl
    //        should go away
    impl io::Write for Stderr {
        fn write(&mut self, data: &[u8]) -> io::Result<usize> {
            Stderr::write(self, data)
        }

        fn flush(&mut self) -> io::Result<()> {
            Stderr::flush(self)
        }
    }

    pub fn is_ebadf(err: &io::Error) -> bool {
        err.raw_os_error() == Some(libc::EBADF as i32)
    }

    pub const STDIN_BUF_SIZE: usize = ::sys_common::io::DEFAULT_BUF_SIZE;

    pub fn stderr_prints_nothing() -> bool {
        false
    }

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