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Annotation of 43BSDTahoe/etc/update.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1987 Regents of the University of California.
        !             3:  * All rights reserved.  The Berkeley software License Agreement
        !             4:  * specifies the terms and conditions for redistribution.
        !             5:  */
        !             6: 
        !             7: #ifndef lint
        !             8: static char sccsid[] = "@(#)update.c   4.3 (Berkeley) 3/28/87";
        !             9: #endif
        !            10: 
        !            11: /*
        !            12:  * Update the file system every 30 seconds.
        !            13:  * For cache benefit, open certain system directories.
        !            14:  */
        !            15: 
        !            16: #include <sys/time.h>
        !            17: #include <sys/file.h>
        !            18: #include <sys/signal.h>
        !            19: #include <syslog.h>
        !            20: #include <stdio.h>
        !            21: 
        !            22: char *fillst[] = {
        !            23:        "/bin",
        !            24:        "/lib",
        !            25:        "/usr",
        !            26:        "/usr/bin",
        !            27:        "/usr/lib",
        !            28:        "/usr/ucb",
        !            29:        0,
        !            30: };
        !            31: 
        !            32: main()
        !            33: {
        !            34:        struct itimerval        value;
        !            35:        register char   **f;
        !            36:        extern int      sync();
        !            37: 
        !            38:        if (fork())
        !            39:                exit(0);
        !            40:        (void)close(0);
        !            41:        (void)close(1);
        !            42:        (void)close(2);
        !            43:        for (f = fillst; *f; f++)
        !            44:                (void)open(*f, O_RDONLY, 0);
        !            45:        (void)signal(SIGALRM, sync);
        !            46:        value.it_interval.tv_sec = 30;
        !            47:        value.it_interval.tv_usec = 0;
        !            48:        value.it_value = value.it_interval;
        !            49:        if (setitimer(ITIMER_REAL, &value, (struct itimerval *)NULL)) {
        !            50:                perror("update: setitimer");
        !            51:                exit(1);
        !            52:        }
        !            53:        for (;;)
        !            54:                pause();
        !            55:        /*NOTREACHED*/
        !            56: }

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