2.11BSD#431 - /usr/src/usr.sbin/update/update.c

   1: /*-
   2:  * Copyright (c) 1987, 1990, 1993
   3:  *	The Regents of the University of California.  All rights reserved.
   4:  *
   5:  * Redistribution and use in source and binary forms, with or without
   6:  * modification, are permitted provided that the following conditions
   7:  * are met:
   8:  * 1. Redistributions of source code must retain the above copyright
   9:  *    notice, this list of conditions and the following disclaimer.
  10:  * 2. Redistributions in binary form must reproduce the above copyright
  11:  *    notice, this list of conditions and the following disclaimer in the
  12:  *    documentation and/or other materials provided with the distribution.
  13:  * 3. All advertising materials mentioning features or use of this software
  14:  *    must display the following acknowledgement:
  15:  *	This product includes software developed by the University of
  16:  *	California, Berkeley and its contributors.
  17:  * 4. Neither the name of the University nor the names of its contributors
  18:  *    may be used to endorse or promote products derived from this software
  19:  *    without specific prior written permission.
  20:  *
  21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31:  * SUCH DAMAGE.
  32:  */
  33: 
  34: #if !defined(lint) && defined(DOSCCS)
  35: static char copyright[] =
  36: "@(#) Copyright (c) 1987, 1990, 1993\n\
  37: 	The Regents of the University of California.  All rights reserved.\n";
  38: 
  39: static char sccsid[] = "@(#)update.c	8.1.1 (2.11BSD) 1999/10/24";
  40: #endif
  41: 
  42: #include <sys/time.h>
  43: #include <signal.h>
  44: #include <stdio.h>
  45: 
  46: main()
  47: {
  48:     struct itimerval value;
  49:     sigset_t set;
  50:     void mysync();
  51: 
  52:     daemon(0, 0);
  53: 
  54:     (void)signal(SIGALRM, mysync);
  55: 
  56:     value.it_interval.tv_sec = 30;
  57:     value.it_interval.tv_usec = 0;
  58:     value.it_value = value.it_interval;
  59:     if (setitimer(ITIMER_REAL, &value, NULL)) {
  60:         perror("update: setitimer");
  61:         exit(1);
  62:     }
  63: 
  64:     (void)sigemptyset(&set);
  65:     for (;;)
  66:         sigsuspend(&set);
  67:     /* NOTREACHED */
  68: }
  69: 
  70: void
  71: mysync()
  72: {
  73:     (void)sync();
  74: }

Defined functions

Defined variables