46 lines
1.6 KiB
C
46 lines
1.6 KiB
C
/* Copyright (C) 1992, 1996, 1997 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, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
/* Modified for newlib, May 27, 2002, by Jeff Johnston */
|
|
|
|
#include <errno.h>
|
|
#include <stddef.h>
|
|
#include <signal.h>
|
|
#include <termios.h>
|
|
#include <unistd.h>
|
|
#include <sys/ioctl.h>
|
|
|
|
/* Send zero bits on FD. */
|
|
int
|
|
tcsendbreak (fd, duration)
|
|
int fd;
|
|
int duration;
|
|
{
|
|
/* 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 milliseconds to break. */
|
|
if (duration <= 0)
|
|
return ioctl (fd, TCSBRK, 0);
|
|
|
|
/* ioctl can't send a break of any other duration for us.
|
|
This could be changed to use trickery (e.g. lower speed and
|
|
send a '\0') to send the break, but for now just return an error. */
|
|
errno = (EINVAL);
|
|
return -1;
|
|
}
|