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Annotation of 43BSDReno/usr.bin/biff/biff.c, revision 1.1.1.1

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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