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41bdb6e20c
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
45 lines
1.6 KiB
C
45 lines
1.6 KiB
C
/* Copyright (C) 1992, 1996, 1997 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <errno.h>
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#include <stddef.h>
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#include <signal.h>
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#include <termios.h>
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#include <unistd.h>
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#include <sysv_termio.h>
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#include <sys/ioctl.h>
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/* Send zero bits on FD. */
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int
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tcsendbreak (fd, duration)
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int fd;
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int duration;
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{
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/* The break lasts 0.25 to 0.5 seconds if DURATION is zero,
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and an implementation-defined period if DURATION is nonzero.
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We define a positive DURATION to be number of milliseconds to break. */
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if (duration <= 0)
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return __ioctl (fd, _TCSBRK, 0);
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/* ioctl can't send a break of any other duration for us.
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This could be changed to use trickery (e.g. lower speed and
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send a '\0') to send the break, but for now just return an error. */
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__set_errno (EINVAL);
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return -1;
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}
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