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Annotation of 43BSDTahoe/etc/update.c, revision 1.1.1.1

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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