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Annotation of 43BSD/ucb/biff.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1983 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: char copyright[] =
        !             9: "@(#) Copyright (c) 1980 Regents of the University of California.\n\
        !            10:  All rights reserved.\n";
        !            11: #endif not lint
        !            12: 
        !            13: #ifndef lint
        !            14: static char sccsid[] = "@(#)biff.c     5.1 (Berkeley) 5/31/85";
        !            15: #endif not lint
        !            16: 
        !            17: /*
        !            18:  * biff
        !            19:  */
        !            20: 
        !            21: #include <sys/types.h>
        !            22: #include <sys/stat.h>
        !            23: #include <stdio.h>
        !            24: 
        !            25: char   *ttyname();
        !            26: 
        !            27: main(argc, argv)
        !            28:        int argc;
        !            29:        char **argv;
        !            30: {
        !            31:        char *cp = ttyname(2);
        !            32:        struct stat stb;
        !            33: 
        !            34:        argc--, argv++;
        !            35:        if (cp == 0)
        !            36:                fprintf(stderr, "Where are you?\n"), exit(1);
        !            37:        if (stat(cp, &stb) < 0)
        !            38:                perror(cp), exit(1);
        !            39:        if (argc == 0) {
        !            40:                printf("is %s\n", stb.st_mode&0100 ? "y" : "n");
        !            41:                exit((stb.st_mode&0100) ? 0 : 1);
        !            42:        }
        !            43:        switch (argv[0][0]) {
        !            44: 
        !            45:        case 'y':
        !            46:                if (chmod(cp, stb.st_mode|0100) < 0)
        !            47:                        perror(cp);
        !            48:                break;
        !            49: 
        !            50:        case 'n':
        !            51:                if (chmod(cp, stb.st_mode&~0100) < 0)
        !            52:                        perror(cp);
        !            53:                break;
        !            54: 
        !            55:        default:
        !            56:                fprintf(stderr, "usage: biff [y] [n]\n");
        !            57:        }
        !            58:        exit((stb.st_mode&0100) ? 0 : 1);
        !            59: }

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