Expose the RawFd wrapped by struct PollFd

[mlang]

No description provided.

[asomers]

Could you please tell me a little bit more about what you're trying to accomplish?

[mlang]

I am trying to figure out *which* fd produced an event. Maybe I am overlooking something blatantly obvious, but how would you know which descriptor had some activity? ```rust let mut fds = [PollFd::new(pty.master, PollFlags::POLLIN), PollFd::new(STDIN_FILENO, PollFlags::POLLIN)]; 'polling: loop { if poll(&mut fds, 1000)? > 0 { for fd in fds.iter() { if let Some(flags) = fd.revents() { if flags.contains(PollFlags::POLLIN) { let other = if fd.raw_fd() == pty.master { STDOUT_FILENO } else { pty.master }; let mut buf = MaybeUninit::<[u8; 512]>::uninit(); if let Ok(size) = read(fd.raw_fd(), unsafe { &mut *buf.as_mut_ptr() }) { let slice = &unsafe { buf.assume_init() }[0..size]; write(other, slice)?; } } else if flags.contains(PollFlags::POLLHUP) { break 'polling } } } } } ``` -- CYa, ⡍⠁⠗⠊⠕

[zopsicle]

PollFd implements AsRawFd so you can access the file descriptor by calling fd.as_raw_fd().

[SteveLauC]

Thanks for your contributing!

That issue has already been fixed, so I am gonna close this PR, I am sorry about this.