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- /* $Id: signal_handler.c 1757 2007-03-22 05:38:56Z aturner $ */
- /*
- * Copyright (c) 2001-2007 Aaron Turner, Jeff Guttenfelder, Nathan Monteleone
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the names of the copyright owners nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
- * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
- * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
- /*
- * Description:
- * This file contains routines relating to signals.
- *
- * Modifications:
- * 01/24/2003 Added suspend signal support.
- */
- #include "config.h"
- #include "defines.h"
- #include "common.h"
- #include <signal.h>
- #include <sys/time.h>
- #include <stdio.h>
- #include <sys/types.h>
- #include <unistd.h>
- #include <string.h>
- #include <errno.h>
- #include "tcpreplay.h"
- #include "signal_handler.h"
- struct timeval suspend_time;
- static struct timeval suspend_start;
- static struct timeval suspend_end;
- /*
- * init_signal_handlers -
- * Initialize signal handlers to be used in tcpreplay.
- */
- void
- init_signal_handlers()
- {
- signal(SIGUSR1, suspend_handler);
- signal(SIGCONT, continue_handler);
- reset_suspend_time();
- }
- /*
- * reset_suspend_time -
- * Reset time values for suspend signal.
- */
- void
- reset_suspend_time()
- {
- timerclear(&suspend_time);
- timerclear(&suspend_start);
- timerclear(&suspend_end);
- }
- /*
- * suspend signal handler -
- * Signal handler for signal SIGUSR1. SIGSTOP cannot be
- * caught, so SIGUSR1 is caught and it throws SIGSTOP.
- */
- void
- suspend_handler(int signo)
- {
- if (signo != SIGUSR1) {
- warnx("suspend_handler() got the wrong signal: %d", signo);
- return;
- }
- if (gettimeofday(&suspend_start, NULL) < 0)
- errx(1, "gettimeofday(): %s", strerror(errno));
- kill(getpid(), SIGSTOP);
- }
- /*
- * continue_handler -
- * Signal handler for continue signal.
- */
- void
- continue_handler(int signo)
- {
- struct timeval suspend_delta;
-
- if (signo != SIGCONT) {
- warnx("continue_handler() got the wrong signal: %d", signo);
- return;
- }
-
- if (gettimeofday(&suspend_end, NULL) < 0)
- errx(1, "gettimeofday(): %s", strerror(errno));
- timersub(&suspend_end, &suspend_start, &suspend_delta);
- timeradd(&suspend_time, &suspend_delta, &suspend_time);
- }
- /*
- Local Variables:
- mode:c
- indent-tabs-mode:nil
- c-basic-offset:4
- End:
- */
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