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Annotation of 42BSD/etc/update.c, revision 1.1

1.1     ! root        1: static char *sccsid = "@(#)update.c    4.2 (Berkeley) 10/16/80";
        !             2: /*
        !             3:  * Update the file system every 30 seconds.
        !             4:  * For cache benefit, open certain system directories.
        !             5:  */
        !             6: 
        !             7: #include <signal.h>
        !             8: 
        !             9: char *fillst[] = {
        !            10:        "/bin",
        !            11:        "/lib",
        !            12:        "/usr",
        !            13:        "/usr/bin",
        !            14:        "/usr/lib",
        !            15:        "/usr/ucb",
        !            16:        0,
        !            17: };
        !            18: 
        !            19: main()
        !            20: {
        !            21:        char **f;
        !            22: 
        !            23:        if(fork())
        !            24:                exit(0);
        !            25:        close(0);
        !            26:        close(1);
        !            27:        close(2);
        !            28:        for(f = fillst; *f; f++)
        !            29:                open(*f, 0);
        !            30:        dosync();
        !            31:        for(;;)
        !            32:                pause();
        !            33: }
        !            34: 
        !            35: dosync()
        !            36: {
        !            37:        sync();
        !            38:        signal(SIGALRM, dosync);
        !            39:        alarm(30);
        !            40: }

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