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 * $FreeBSD: src/usr.bin/biff/biff.c,v 1.6.2.4 2002/08/09 02:56:31 johan Exp $ 34 * $DragonFly: src/usr.bin/biff/biff.c,v 1.2 2003/06/17 04:29:25 dillon Exp $ 35 * 36 * @(#) Copyright (c) 1980, 1993 The Regents of the University of California. All rights reserved. 37 * @(#)biff.c 8.1 (Berkeley) 6/6/93 38 */ 39 40 #include <sys/types.h> 41 #include <sys/stat.h> 42 #include <errno.h> 43 #include <unistd.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <string.h> 47 #include <err.h> 48 49 int main __P((int, char *[])); 50 static void usage __P((void)); 51 52 int 53 main(argc, argv) 54 int argc; 55 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(STDERR_FILENO)) == NULL) 72 err(2, "unknown tty"); 73 74 if (stat(name, &sb)) 75 err(2, "stat"); 76 77 if (*argv == NULL) { 78 (void)printf("is %s\n", 79 sb.st_mode & S_IXUSR ? "y" : 80 sb.st_mode & S_IXGRP ? "b" : "n"); 81 return(sb.st_mode & (S_IXUSR | S_IXGRP) ? 0 : 1); 82 83 } 84 85 switch(argv[0][0]) { 86 case 'n': 87 if (chmod(name, sb.st_mode & ~(S_IXUSR | S_IXGRP)) < 0) 88 err(2, "%s", name); 89 break; 90 case 'y': 91 if (chmod(name, (sb.st_mode & ~(S_IXUSR | S_IXGRP)) | S_IXUSR) < 0) 92 err(2, "%s", name); 93 break; 94 case 'b': 95 if (chmod(name, (sb.st_mode & ~(S_IXUSR | S_IXGRP)) | S_IXGRP) < 0) 96 err(2, "%s", name); 97 break; 98 default: 99 usage(); 100 } 101 return(sb.st_mode & (S_IXUSR | S_IXGRP) ? 0 : 1); 102 } 103 104 static void 105 usage() 106 { 107 (void)fprintf(stderr, "usage: biff [n | y | b]\n"); 108 exit(2); 109 } 110