| 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, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. All advertising materials mentioning features or use of this software |
| 14 | * must display the following acknowledgement: |
| 15 | * This product includes software developed by the University of |
| 16 | * California, Berkeley and its contributors. |
| 17 | * 4. Neither the name of the University nor the names of its contributors |
| 18 | * may be used to endorse or promote products derived from this software |
| 19 | * without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | */ |
| 33 | |
| 34 | #ifndef lint |
| 35 | char copyright[] = |
| 36 | "@(#) Copyright (c) 1980 The Regents of the University of California.\n\ |
| 37 | All rights reserved.\n"; |
| 38 | #endif /* not lint */ |
| 39 | |
| 40 | #ifndef lint |
| 41 | static char sccsid[] = "@(#)biff.c 5.3 (Berkeley) 6/1/90"; |
| 42 | #endif /* not lint */ |
| 43 | |
| 44 | /* |
| 45 | * biff |
| 46 | */ |
| 47 | #include <sys/types.h> |
| 48 | #include <sys/stat.h> |
| 49 | #include <stdio.h> |
| 50 | |
| 51 | char *ttyname(); |
| 52 | |
| 53 | main(argc, argv) |
| 54 | int argc; |
| 55 | char **argv; |
| 56 | { |
| 57 | char *cp = ttyname(2); |
| 58 | struct stat stb; |
| 59 | |
| 60 | argc--, argv++; |
| 61 | if (cp == 0) |
| 62 | fprintf(stderr, "Where are you?\n"), exit(1); |
| 63 | if (stat(cp, &stb) < 0) |
| 64 | perror(cp), exit(1); |
| 65 | if (argc == 0) { |
| 66 | printf("is %s\n", stb.st_mode&0100 ? "y" : "n"); |
| 67 | exit((stb.st_mode&0100) ? 0 : 1); |
| 68 | } |
| 69 | switch (argv[0][0]) { |
| 70 | |
| 71 | case 'y': |
| 72 | if (chmod(cp, stb.st_mode|0100) < 0) |
| 73 | perror(cp); |
| 74 | break; |
| 75 | |
| 76 | case 'n': |
| 77 | if (chmod(cp, stb.st_mode&~0100) < 0) |
| 78 | perror(cp); |
| 79 | break; |
| 80 | |
| 81 | default: |
| 82 | fprintf(stderr, "usage: biff [y] [n]\n"); |
| 83 | } |
| 84 | exit((stb.st_mode&0100) ? 0 : 1); |
| 85 | } |