1 /* $OpenBSD: biff.c,v 1.6 2000/06/30 16:00:11 millert 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. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef lint 38 static char copyright[] = 39 "@(#) Copyright (c) 1980, 1993\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41 #endif /* not lint */ 42 43 #ifndef lint 44 #if 0 45 static char sccsid[] = "@(#)biff.c 8.1 (Berkeley) 6/6/93"; 46 #else 47 static char rcsid[] = "$OpenBSD: biff.c,v 1.6 2000/06/30 16:00:11 millert Exp $"; 48 #endif 49 #endif /* not lint */ 50 51 #include <sys/types.h> 52 #include <sys/stat.h> 53 54 #include <err.h> 55 #include <errno.h> 56 #include <stdio.h> 57 #include <stdlib.h> 58 #include <string.h> 59 #include <unistd.h> 60 61 static void usage __P((void)); 62 63 int 64 main(argc, argv) 65 int argc; 66 char *argv[]; 67 { 68 struct stat sb; 69 int ch; 70 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 & S_IXUSR ? "y" : "n"); 90 exit(sb.st_mode & S_IXUSR ? 0 : 1); 91 } 92 93 switch(argv[0][0]) { 94 case 'n': 95 if (chmod(name, sb.st_mode & ~S_IXUSR) < 0) 96 err(2, "%s", name); 97 break; 98 case 'y': 99 if (chmod(name, sb.st_mode | S_IXUSR) < 0) 100 err(2, "%s", name); 101 break; 102 default: 103 usage(); 104 } 105 exit(sb.st_mode & S_IXUSR ? 0 : 1); 106 } 107 108 static void 109 usage() 110 { 111 (void)fprintf(stderr, "usage: biff [y | n]\n"); 112 exit(2); 113 } 114