glibc/sysdeps/unix/bsd/tcflush.c
Joseph Myers 04277e02d7 Update copyright dates with scripts/update-copyrights.
* All files with FSF copyright notices: Update copyright dates
	using scripts/update-copyrights.
	* locale/programs/charmap-kw.h: Regenerated.
	* locale/programs/locfile-kw.h: Likewise.
2019-01-01 00:11:28 +00:00

49 lines
1.3 KiB
C

/* Copyright (C) 1991-2019 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 Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <stddef.h>
#include <termios.h>
#include <unistd.h>
#include "bsdtty.h"
#include <sys/file.h>
/* Flush pending data on FD. */
int
tcflush (int fd, int queue_selector)
{
int arg;
switch (queue_selector)
{
case TCIFLUSH:
arg = FREAD;
break;
case TCOFLUSH:
arg = FWRITE;
break;
case TCIOFLUSH:
arg = FREAD | FWRITE;
break;
default:
__set_errno (EINVAL);
return -1;
}
return __ioctl (fd, TIOCFLUSH, (void *) &arg);
}