/* Copyright (C) 1991-2018 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 <signal.h>

#include <termios.h>

#include <unistd.h>

#include "bsdtty.h"

#include <sys/file.h>

#include <sys/time.h>

#include <sys/types.h>

/* Send zero bits on FD.  */

int

tcsendbreak (int fd, int duration)

{

  struct timeval delay;

  /* The break lasts 0.25 to 0.5 seconds if DURATION is zero,

     and an implementation-defined period if DURATION is nonzero.

     We define a positive DURATION to be number of microseconds to break.  */

  if (duration <= 0)

    duration = 400000;

  delay.tv_sec = 0;

  delay.tv_usec = duration;

  /* Starting sending break.  */

  if (__ioctl (fd, TIOCSBRK, (void *) NULL) < 0)

    return -1;

  /* Wait DURATION microseconds.  */

  (void) __select (0, (fd_set *) NULL, (fd_set *) NULL, (fd_set *) NULL,

		   &delay);

  /* Turn off the break.  */

  return __ioctl (fd, TIOCCBRK, (void *) NULL);

}