125 lines
3.3 KiB
C
125 lines
3.3 KiB
C
/*-
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* Copyright (c) 1987, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char copyright[] =
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"@(#) Copyright (c) 1987, 1990, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)update.c 8.1 (Berkeley) 6/6/93";
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#else
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static char rcsid[] = "$NetBSD: update.c,v 1.5 1997/04/16 17:45:05 christos Exp $";
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#endif
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#endif /* not lint */
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#include <sys/time.h>
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#include <err.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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void mysync __P((int));
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void usage __P((void));
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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struct itimerval value;
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int ch;
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struct sigaction sa;
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sigset_t set, oset;
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value.it_interval.tv_sec = 30;
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value.it_interval.tv_usec = 0;
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while ((ch = getopt(argc, argv, "")) != -1) {
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switch (ch) {
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default:
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case '?':
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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if (argc) {
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value.it_interval.tv_sec = atoi(argv[0]);
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--argc;
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++argv;
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}
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if (argc)
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usage();
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daemon(0, 0);
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sa.sa_handler = mysync;
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sigemptyset(&sa.sa_mask);
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sa.sa_flags = 0;
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if (sigaction(SIGALRM, &sa, (struct sigaction *)0) < 0)
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err(1, "sigaction");
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value.it_value = value.it_interval;
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if (setitimer(ITIMER_REAL, &value, NULL) < 0)
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err(1, "setitimer");
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sigemptyset(&set);
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sigprocmask(SIG_BLOCK, &set, &oset);
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for (;;)
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sigsuspend(&oset);
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/* NOTREACHED */
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}
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void
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mysync(n)
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int n;
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{
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(void)sync();
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}
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void
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usage()
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{
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(void)fprintf(stderr, "usage: update [interval]\n");
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exit(1);
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}
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