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[] = "from: @(#)biff.c 5.3 (Berkeley) 6/1/90";*/ 42 static char rcsid[] = "$Id: biff.c,v 1.2 1993/08/01 18:18:20 mycroft Exp $"; 43 #endif /* not lint */ 44 45 /* 46 * biff 47 */ 48 #include <sys/types.h> 49 #include <sys/stat.h> 50 #include <stdio.h> 51 52 char *ttyname(); 53 54 main(argc, argv) 55 int argc; 56 char **argv; 57 { 58 char *cp = ttyname(2); 59 struct stat stb; 60 61 argc--, argv++; 62 if (cp == 0) 63 fprintf(stderr, "Where are you?\n"), exit(1); 64 if (stat(cp, &stb) < 0) 65 perror(cp), exit(1); 66 if (argc == 0) { 67 printf("is %s\n", stb.st_mode&0100 ? "y" : "n"); 68 exit((stb.st_mode&0100) ? 0 : 1); 69 } 70 switch (argv[0][0]) { 71 72 case 'y': 73 if (chmod(cp, stb.st_mode|0100) < 0) 74 perror(cp); 75 break; 76 77 case 'n': 78 if (chmod(cp, stb.st_mode&~0100) < 0) 79 perror(cp); 80 break; 81 82 default: 83 fprintf(stderr, "usage: biff [y] [n]\n"); 84 } 85 exit((stb.st_mode&0100) ? 0 : 1); 86 } 87