1 /* $NetBSD: biff.c,v 1.10 2008/07/21 14:19:21 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1980, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 __COPYRIGHT("@(#) Copyright (c) 1980, 1993\ 35 The Regents of the University of California. All rights reserved."); 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)biff.c 8.1 (Berkeley) 6/6/93"; 41 #else 42 __RCSID("$NetBSD: biff.c,v 1.10 2008/07/21 14:19:21 lukem Exp $"); 43 #endif 44 #endif /* not lint */ 45 46 #include <sys/types.h> 47 #include <sys/stat.h> 48 49 #include <err.h> 50 #include <errno.h> 51 #include <stdio.h> 52 #include <stdlib.h> 53 #include <string.h> 54 #include <unistd.h> 55 56 static void usage(void); 57 58 int 59 main(int argc, char *argv[]) 60 { 61 struct stat sb; 62 int ch; 63 const char *name; 64 65 66 while ((ch = getopt(argc, argv, "")) != -1) 67 switch(ch) { 68 case '?': 69 default: 70 usage(); 71 } 72 argc -= optind; 73 argv += optind; 74 75 if ((name = ttyname(STDERR_FILENO)) == NULL) 76 err(2, "tty"); 77 78 if (stat(name, &sb)) 79 err(2, "stat"); 80 81 if (*argv == NULL) { 82 (void)printf("is %s\n", sb.st_mode&0100 ? "y" : "n"); 83 exit(sb.st_mode & 0100 ? 0 : 1); 84 } 85 86 switch(argv[0][0]) { 87 case 'n': 88 if (chmod(name, sb.st_mode & ~0100) < 0) 89 err(2, "%s", name); 90 break; 91 case 'y': 92 if (chmod(name, sb.st_mode | 0100) < 0) 93 err(2, "%s", name); 94 break; 95 default: 96 usage(); 97 } 98 exit(sb.st_mode & 0100 ? 0 : 1); 99 } 100 101 static void 102 usage(void) 103 { 104 (void)fprintf(stderr, "usage: biff [y | n]\n"); 105 exit(2); 106 } 107