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/* Copyright (C) 1991 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <ansidecl.h>
#include <errno.h>
#include <stddef.h>
#include <termios.h>
#include <unistd.h>
#include "bsdtty.h"
/* Wait for pending output to be written on FD. */
int
DEFUN(tcdrain, (fd), int fd)
{
/* The TIOCSETP control waits for pending output to be written before
affecting its changes, so we use that without changing anything. */
struct sgttyb b;
if (__ioctl(fd, TIOCGETP, (PTR) &b) < 0 ||
__ioctl(fd, TIOCSETP, (PTR) &b) < 0)
return -1;
return 0;
}
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