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Annotation of researchv10no/cmd/newer.c, revision 1.1

1.1     ! root        1: #include <sys/types.h>
        !             2: #include <sys/stat.h>
        !             3: 
        !             4: /*
        !             5:  *     newer x y
        !             6:  *
        !             7:  *     returns 0 if x exists and y does not, or if
        !             8:  *     files x and y both exist and x was modified
        !             9:  *     at least as recently as y, and nonzero otherwise.
        !            10:  */
        !            11: 
        !            12: main (argc, argv)
        !            13:        int argc;
        !            14:        register int **argv;
        !            15: {
        !            16:        struct stat x, y;
        !            17: 
        !            18:        /* insist on exactly two args */
        !            19:        if (argc != 3)
        !            20:                return 1;
        !            21:        
        !            22:        /* does the first file exist? */
        !            23:        if (stat (argv[1], &x) < 0)
        !            24:                return 1;
        !            25:        
        !            26:        /* does the second file exist? */
        !            27:        if (stat (argv[2], &y) < 0)
        !            28:                return 0;
        !            29:        
        !            30:        /* fail if the first file is older than the second */
        !            31:        if (x.st_mtime < y.st_mtime)
        !            32:                return 1;
        !            33:        
        !            34:        /* otherwise, succeed */
        !            35:        return 0;
        !            36: }

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