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 } 86