initial import

sysdeps/unix/bsd/tcsendbrk.c

@@ -0,0 +1,55 @@
+/* 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);
+}