1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 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 #ifndef lint 33 static const char copyright[] = 34 "@(#) Copyright (c) 1980, 1993\n\ 35 The Regents of the University of California. All rights reserved.\n"; 36 #endif 37 38 #if 0 39 #ifndef lint 40 static char sccsid[] = "@(#)biff.c 8.1 (Berkeley) 6/6/93"; 41 #endif 42 #endif 43 44 #include <sys/cdefs.h> 45 __FBSDID("$FreeBSD$"); 46 47 #include <sys/stat.h> 48 49 #include <err.h> 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <unistd.h> 53 54 static void usage(void); 55 56 int 57 main(int argc, char *argv[]) 58 { 59 struct stat sb; 60 int ch; 61 char *name; 62 63 64 while ((ch = getopt(argc, argv, "")) != -1) 65 switch(ch) { 66 case '?': 67 default: 68 usage(); 69 } 70 argc -= optind; 71 argv += optind; 72 73 if ((name = ttyname(STDIN_FILENO)) == NULL && 74 (name = ttyname(STDOUT_FILENO)) == NULL && 75 (name = ttyname(STDERR_FILENO)) == NULL) 76 err(2, "unknown tty"); 77 78 if (stat(name, &sb)) 79 err(2, "stat"); 80 81 if (*argv == NULL) { 82 (void)printf("is %s\n", 83 sb.st_mode & S_IXUSR ? "y" : 84 sb.st_mode & S_IXGRP ? "b" : "n"); 85 return (sb.st_mode & (S_IXUSR | S_IXGRP) ? 0 : 1); 86 87 } 88 89 switch (argv[0][0]) { 90 case 'n': 91 if (chmod(name, sb.st_mode & ~(S_IXUSR | S_IXGRP)) < 0) 92 err(2, "%s", name); 93 break; 94 case 'y': 95 if (chmod(name, (sb.st_mode & ~(S_IXUSR | S_IXGRP)) | S_IXUSR) 96 < 0) 97 err(2, "%s", name); 98 break; 99 case 'b': 100 if (chmod(name, (sb.st_mode & ~(S_IXUSR | S_IXGRP)) | S_IXGRP) 101 < 0) 102 err(2, "%s", name); 103 break; 104 default: 105 usage(); 106 } 107 return (sb.st_mode & (S_IXUSR | S_IXGRP) ? 0 : 1); 108 } 109 110 static void 111 usage(void) 112 { 113 (void)fprintf(stderr, "usage: biff [n | y | b]\n"); 114 exit(2); 115 } 116