1 /* $NetBSD: biff.c,v 1.7 2000/07/07 15:13:21 itojun 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) Copyright (c) 1980, 1993\n\ 39 The Regents of the University of California. All rights reserved.\n"); 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "@(#)biff.c 8.1 (Berkeley) 6/6/93"; 45 #else 46 __RCSID("$NetBSD: biff.c,v 1.7 2000/07/07 15:13:21 itojun Exp $"); 47 #endif 48 #endif /* not lint */ 49 50 #include <sys/types.h> 51 #include <sys/stat.h> 52 53 #include <err.h> 54 #include <errno.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <unistd.h> 59 60 static void usage __P((void)); 61 int main __P((int, char **)); 62 63 int 64 main(argc, argv) 65 int argc; 66 char *argv[]; 67 { 68 struct stat sb; 69 int ch; 70 const char *name; 71 72 73 while ((ch = getopt(argc, argv, "")) != -1) 74 switch(ch) { 75 case '?': 76 default: 77 usage(); 78 } 79 argc -= optind; 80 argv += optind; 81 82 if ((name = ttyname(STDERR_FILENO)) == NULL) 83 err(2, "tty"); 84 85 if (stat(name, &sb)) 86 err(2, "stat"); 87 88 if (*argv == NULL) { 89 (void)printf("is %s\n", sb.st_mode&0100 ? "y" : "n"); 90 exit(sb.st_mode & 0100 ? 0 : 1); 91 } 92 93 switch(argv[0][0]) { 94 case 'n': 95 if (chmod(name, sb.st_mode & ~0100) < 0) 96 err(2, "%s", name); 97 break; 98 case 'y': 99 if (chmod(name, sb.st_mode | 0100) < 0) 100 err(2, "%s", name); 101 break; 102 default: 103 usage(); 104 } 105 exit(sb.st_mode & 0100 ? 0 : 1); 106 } 107 108 static void 109 usage() 110 { 111 (void)fprintf(stderr, "usage: biff [y | n]\n"); 112 exit(2); 113 } 114