projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| fcd2465c DF |
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 | ||
| 840fc587 | 7 | #ifndef lint |
| fcd2465c DF |
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) %G%"; | |
| 15 | #endif not lint | |
| 16 | ||
| c68204ea BJ |
17 | /* |
| 18 | * biff | |
| 19 | */ | |
| 20 | ||
| 21 | #include <sys/types.h> | |
| 840fc587 | 22 | #include <sys/stat.h> |
| c68204ea BJ |
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 | } |