mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-27 04:41:02 +08:00
44 lines
1.6 KiB
C
44 lines
1.6 KiB
C
|
/* Copyright (C) 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 <sysv_termio.h>
|
||
|
|
#include <sys/ioctl.h>
|
||
|
|
|
||
|
|
/* Send zero bits on FD. */
|
||
|
|
int
|
||
|
|
DEFUN(tcsendbreak, (fd, duration), int fd AND 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;
|
||
|
|
}
|