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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 static const char copyright[] = 36 "@(#) Copyright (c) 1980, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif 39 40 #if 0 41 #ifndef lint 42 static char sccsid[] = "@(#)biff.c 8.1 (Berkeley) 6/6/93"; 43 #endif 44 #endif 45 46 #include <sys/cdefs.h> 47 __FBSDID("$FreeBSD$"); 48 49 #include <sys/stat.h> 50 51 #include <err.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <unistd.h> 55 56 static void usage(void); 57 58 int 59 main(argc, argv) 60 int argc; 61 char *argv[]; 62 { 63 struct stat sb; 64 int ch; 65 char *name; 66 67 68 while ((ch = getopt(argc, argv, "")) != -1) 69 switch(ch) { 70 case '?': 71 default: 72 usage(); 73 } 74 argc -= optind; 75 argv += optind; 76 77 if ((name = ttyname(STDERR_FILENO)) == NULL) 78 err(2, "unknown tty"); 79 80 if (stat(name, &sb)) 81 err(2, "stat"); 82 83 if (*argv == NULL) { 84 (void)printf("is %s%s\n", 85 sb.st_mode & S_IXUSR ? "y" : 86 sb.st_mode & S_IXGRP ? "b" : "n"); 87 return(sb.st_mode & (S_IXUSR | S_IXGRP) ? 0 : 1); 88 89 } 90 91 switch(argv[0][0]) { 92 case 'n': 93 if (chmod(name, sb.st_mode & ~(S_IXUSR | S_IXGRP)) < 0) 94 err(2, "%s", name); 95 break; 96 case 'y': 97 if (chmod(name, (sb.st_mode & ~(S_IXUSR | S_IXGRP)) | S_IXUSR) < 0) 98 err(2, "%s", name); 99 break; 100 case 'b': 101 if (chmod(name, (sb.st_mode & ~(S_IXUSR | S_IXGRP)) | S_IXGRP) < 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() 112 { 113 (void)fprintf(stderr, "usage: biff [n | y | b]\n"); 114 exit(2); 115 } 116