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Annotation of 43BSDReno/usr.sbin/update/update.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1987, 1990 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   4.5 (Berkeley) 6/29/90";
                      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 "pathnames.h"
                     20: 
                     21: main()
                     22: {
                     23:        struct itimerval value;
                     24:        register char **f;
                     25:        extern int sync();
                     26: 
                     27:        daemon(0, 0);
                     28:        for (f = fillst; *f; f++)
                     29:                (void)open(*f, O_RDONLY, 0);
                     30:        (void)signal(SIGALRM, sync);
                     31:        value.it_interval.tv_sec = 30;
                     32:        value.it_interval.tv_usec = 0;
                     33:        value.it_value = value.it_interval;
                     34:        if (setitimer(ITIMER_REAL, &value, (struct itimerval *)NULL)) {
                     35:                perror("update: setitimer");
                     36:                exit(1);
                     37:        }
                     38:        for (;;)
                     39:                pause();
                     40:        /*NOTREACHED*/
                     41: }

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