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Annotation of researchv9/cmd/update.c, revision 1.1

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

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