1 /* 2 * Copyright (c) 1980, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef lint 31 static const char copyright[] = 32 "@(#) Copyright (c) 1980, 1993\n\ 33 The Regents of the University of California. All rights reserved.\n"; 34 #endif 35 36 #if 0 37 #ifndef lint 38 static char sccsid[] = "@(#)biff.c 8.1 (Berkeley) 6/6/93"; 39 #endif 40 #endif 41 42 #include <sys/cdefs.h> 43 __FBSDID("$FreeBSD$"); 44 45 #include <sys/stat.h> 46 47 #include <err.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <unistd.h> 51 52 static void usage(void); 53 54 int 55 main(int argc, char *argv[]) 56 { 57 struct stat sb; 58 int ch; 59 char *name; 60 61 62 while ((ch = getopt(argc, argv, "")) != -1) 63 switch(ch) { 64 case '?': 65 default: 66 usage(); 67 } 68 argc -= optind; 69 argv += optind; 70 71 if ((name = ttyname(STDIN_FILENO)) == NULL && 72 (name = ttyname(STDOUT_FILENO)) == NULL && 73 (name = ttyname(STDERR_FILENO)) == NULL) 74 err(2, "unknown tty"); 75 76 if (stat(name, &sb)) 77 err(2, "stat"); 78 79 if (*argv == NULL) { 80 (void)printf("is %s\n", 81 sb.st_mode & S_IXUSR ? "y" : 82 sb.st_mode & S_IXGRP ? "b" : "n"); 83 return (sb.st_mode & (S_IXUSR | S_IXGRP) ? 0 : 1); 84 85 } 86 87 switch (argv[0][0]) { 88 case 'n': 89 if (chmod(name, sb.st_mode & ~(S_IXUSR | S_IXGRP)) < 0) 90 err(2, "%s", name); 91 break; 92 case 'y': 93 if (chmod(name, (sb.st_mode & ~(S_IXUSR | S_IXGRP)) | S_IXUSR) 94 < 0) 95 err(2, "%s", name); 96 break; 97 case 'b': 98 if (chmod(name, (sb.st_mode & ~(S_IXUSR | S_IXGRP)) | S_IXGRP) 99 < 0) 100 err(2, "%s", name); 101 break; 102 default: 103 usage(); 104 } 105 return (sb.st_mode & (S_IXUSR | S_IXGRP) ? 0 : 1); 106 } 107 108 static void 109 usage(void) 110 { 111 (void)fprintf(stderr, "usage: biff [n | y | b]\n"); 112 exit(2); 113 } 114