Function dup2_stdout

src/stdio.rs:500–509

(fd: Fd)

#[cfg(not(any(windows, target_os = "wasi")))]
#[inline]
pub fn dup2_stdout<Fd: AsFd>(fd: Fd) -> io::Result<()> {
    let fd = fd.as_fd();
    if fd.as_raw_fd() != c::STDOUT_FILENO {
        // SAFETY: We wrap the returned `OwnedFd` to `ManuallyDrop` so that it
        // isn't dropped.
        let mut target = ManuallyDrop::new(unsafe { take_stdout() });
        backend::io::syscalls::dup2(fd, &mut target)?;
    }
    Ok(())
}

/// Utility function to safely `dup2` over stderr (fd 2).
#[cfg(not(any(windows, target_os = "wasi")))]