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Annotation of 41BSD/cmd/update.c, revision 1.1.1.1

1.1       root        1: static char *sccsid = "@(#)update.c    4.2 (Berkeley) 10/15/80";
                      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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