1 /* $OpenBSD: biff.c,v 1.10 2007/02/20 13:41:19 jmc Exp $ */ 2 /* $NetBSD: biff.c,v 1.3 1995/03/26 02:34:22 glass Exp $ */ 3 4 /* 5 * Copyright (c) 1980, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #ifndef lint 34 static char copyright[] = 35 "@(#) Copyright (c) 1980, 1993\n\ 36 The Regents of the University of California. All rights reserved.\n"; 37 #endif /* not lint */ 38 39 #ifndef lint 40 #if 0 41 static char sccsid[] = "@(#)biff.c 8.1 (Berkeley) 6/6/93"; 42 #else 43 static char rcsid[] = "$OpenBSD: biff.c,v 1.10 2007/02/20 13:41:19 jmc Exp $"; 44 #endif 45 #endif /* not lint */ 46 47 #include <sys/types.h> 48 #include <sys/stat.h> 49 50 #include <err.h> 51 #include <errno.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <string.h> 55 #include <unistd.h> 56 57 static void usage(void); 58 59 int 60 main(int argc, char *argv[]) 61 { 62 struct stat sb; 63 int ch; 64 char *name; 65 66 67 while ((ch = getopt(argc, argv, "")) != -1) 68 switch(ch) { 69 case '?': 70 default: 71 usage(); 72 } 73 argc -= optind; 74 argv += optind; 75 76 if ((name = ttyname(STDERR_FILENO)) == NULL) 77 err(2, "tty"); 78 79 if (stat(name, &sb)) 80 err(2, "stat"); 81 82 if (*argv == NULL) { 83 (void)printf("is %s\n", sb.st_mode & S_IXUSR ? "y" : "n"); 84 exit(sb.st_mode & S_IXUSR ? 0 : 1); 85 } 86 87 switch(argv[0][0]) { 88 case 'n': 89 if (chmod(name, sb.st_mode & ~S_IXUSR) < 0) 90 err(2, "%s", name); 91 break; 92 case 'y': 93 if (chmod(name, sb.st_mode | S_IXUSR) < 0) 94 err(2, "%s", name); 95 break; 96 default: 97 usage(); 98 } 99 exit(sb.st_mode & S_IXUSR ? 0 : 1); 100 } 101 102 static void 103 usage(void) 104 { 105 (void)fprintf(stderr, "usage: biff [n | y]\n"); 106 exit(2); 107 } 108