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 * 3. 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 * $FreeBSD: src/usr.bin/biff/biff.c,v 1.6.2.4 2002/08/09 02:56:31 johan Exp $ 30 * $DragonFly: src/usr.bin/biff/biff.c,v 1.5 2007/09/16 00:59:59 pavalos Exp $ 31 * 32 * @(#) Copyright (c) 1980, 1993 The Regents of the University of California. All rights reserved. 33 * @(#)biff.c 8.1 (Berkeley) 6/6/93 34 */ 35 36 #include <sys/types.h> 37 #include <sys/stat.h> 38 39 #include <err.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <unistd.h> 43 44 static void usage(void); 45 46 int 47 main(int argc, char **argv) 48 { 49 struct stat sb; 50 int ch; 51 const char *name; 52 53 54 while ((ch = getopt(argc, argv, "")) != -1) 55 switch(ch) { 56 case '?': 57 default: 58 usage(); 59 } 60 argc -= optind; 61 argv += optind; 62 63 if ((name = ttyname(STDIN_FILENO)) == NULL && 64 (name = ttyname(STDOUT_FILENO)) == NULL && 65 (name = ttyname(STDERR_FILENO)) == NULL) 66 err(2, "unknown tty"); 67 68 if (stat(name, &sb)) 69 err(2, "stat failed"); 70 71 if (*argv == NULL) { 72 printf("is %s\n", 73 sb.st_mode & S_IXUSR ? "y" : 74 sb.st_mode & S_IXGRP ? "b" : "n"); 75 return(sb.st_mode & (S_IXUSR | S_IXGRP) ? 0 : 1); 76 } 77 78 switch(argv[0][0]) { 79 case 'n': 80 if (chmod(name, sb.st_mode & ~(S_IXUSR | S_IXGRP)) < 0) 81 err(2, "%s", name); 82 break; 83 case 'y': 84 if (chmod(name, (sb.st_mode & ~(S_IXUSR | S_IXGRP)) | S_IXUSR) < 0) 85 err(2, "%s", name); 86 break; 87 case 'b': 88 if (chmod(name, (sb.st_mode & ~(S_IXUSR | S_IXGRP)) | S_IXGRP) < 0) 89 err(2, "%s", name); 90 break; 91 default: 92 usage(); 93 } 94 return(sb.st_mode & (S_IXUSR | S_IXGRP) ? 0 : 1); 95 } 96 97 static void 98 usage(void) 99 { 100 fprintf(stderr, "usage: biff [n | y | b]\n"); 101 exit(2); 102 } 103