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Annotation of 43BSDReno/usr.bin/biff/biff.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1980 The Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms are permitted
        !             6:  * provided that: (1) source distributions retain this entire copyright
        !             7:  * notice and comment, and (2) distributions including binaries display
        !             8:  * the following acknowledgement:  ``This product includes software
        !             9:  * developed by the University of California, Berkeley and its contributors''
        !            10:  * in the documentation or other materials provided with the distribution
        !            11:  * and in all advertising materials mentioning features or use of this
        !            12:  * software. Neither the name of the University nor the names of its
        !            13:  * contributors may be used to endorse or promote products derived
        !            14:  * from this software without specific prior written permission.
        !            15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            18:  */
        !            19: 
        !            20: #ifndef lint
        !            21: char copyright[] =
        !            22: "@(#) Copyright (c) 1980 The Regents of the University of California.\n\
        !            23:  All rights reserved.\n";
        !            24: #endif /* not lint */
        !            25: 
        !            26: #ifndef lint
        !            27: static char sccsid[] = "@(#)biff.c     5.3 (Berkeley) 6/1/90";
        !            28: #endif /* not lint */
        !            29: 
        !            30: /*
        !            31:  * biff
        !            32:  */
        !            33: #include <sys/types.h>
        !            34: #include <sys/stat.h>
        !            35: #include <stdio.h>
        !            36: 
        !            37: char   *ttyname();
        !            38: 
        !            39: main(argc, argv)
        !            40:        int argc;
        !            41:        char **argv;
        !            42: {
        !            43:        char *cp = ttyname(2);
        !            44:        struct stat stb;
        !            45: 
        !            46:        argc--, argv++;
        !            47:        if (cp == 0)
        !            48:                fprintf(stderr, "Where are you?\n"), exit(1);
        !            49:        if (stat(cp, &stb) < 0)
        !            50:                perror(cp), exit(1);
        !            51:        if (argc == 0) {
        !            52:                printf("is %s\n", stb.st_mode&0100 ? "y" : "n");
        !            53:                exit((stb.st_mode&0100) ? 0 : 1);
        !            54:        }
        !            55:        switch (argv[0][0]) {
        !            56: 
        !            57:        case 'y':
        !            58:                if (chmod(cp, stb.st_mode|0100) < 0)
        !            59:                        perror(cp);
        !            60:                break;
        !            61: 
        !            62:        case 'n':
        !            63:                if (chmod(cp, stb.st_mode&~0100) < 0)
        !            64:                        perror(cp);
        !            65:                break;
        !            66: 
        !            67:        default:
        !            68:                fprintf(stderr, "usage: biff [y] [n]\n");
        !            69:        }
        !            70:        exit((stb.st_mode&0100) ? 0 : 1);
        !            71: }

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