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/* Copyright (C) 1991-2022 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
<https://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);
}
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