4.3BSD - /usr/src/ucb/biff.c

   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: }

Defined functions

Defined variables