usr/src/usr.sbin/update/update.c

/*-
 * Copyright (c) 1987, 1990, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * %sccs.include.redist.c%
 */

#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1987, 1990, 1993\n\
        The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)update.c    8.1 (Berkeley) %G%";
#endif /* not lint */

#include <sys/time.h>
#include <signal.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>

main()
{
        struct itimerval value;
        void mysync();

        daemon(0, 0);

        (void)signal(SIGALRM, mysync);

        value.it_interval.tv_sec = 30;
        value.it_interval.tv_usec = 0;
        value.it_value = value.it_interval;
        if (setitimer(ITIMER_REAL, &value, NULL)) {
                perror("update: setitimer");
                exit(1);
        }
        for (;;)
                sigpause(sigblock(0L));
        /* NOTREACHED */
}

void
mysync()
{
        (void)sync();
}