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- /* Copyright (C) 1991, 1992 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 <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
- DEFUN(tcsendbreak, (fd, duration), int fd AND 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, (PTR) 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, (PTR) NULL);
- }
-