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__attribute__((__used__)) 36static const char copyright[] = 37"@(#) Copyright (c) 1980, 1993\n\ 38 The Regents of the University of California. All rights reserved.\n"; 39#endif 40 41#if 0 42#ifndef lint 43static char sccsid[] = "@(#)biff.c 8.1 (Berkeley) 6/6/93"; 44#endif 45#endif 46 47#include <sys/cdefs.h> 48__RCSID("$FreeBSD: src/usr.bin/biff/biff.c,v 1.18 2002/07/24 18:54:59 robert Exp $"); 49 50#include <sys/stat.h> 51 52#include <err.h> 53#include <stdio.h> 54#include <stdlib.h> 55#include <unistd.h> 56 57static void usage(void); 58 59int 60main(int argc, char *argv[]) 61{ 62 struct stat sb; 63 int ch; 64 char *name; 65 66 67 while ((ch = getopt(argc, argv, "")) != -1) 68 switch(ch) { 69 case '?': 70 default: 71 usage(); 72 } 73 argc -= optind; 74 argv += optind; 75 76 if ((name = ttyname(STDIN_FILENO)) == NULL && 77 (name = ttyname(STDOUT_FILENO)) == NULL && 78 (name = ttyname(STDERR_FILENO)) == NULL) 79 err(2, "unknown tty"); 80 81 if (stat(name, &sb)) 82 err(2, "stat"); 83 84 if (*argv == NULL) { 85 (void)printf("is %s\n", 86 sb.st_mode & S_IXUSR ? "y" : 87 sb.st_mode & S_IXGRP ? "b" : "n"); 88 return (sb.st_mode & (S_IXUSR | S_IXGRP) ? 0 : 1); 89 90 } 91 92 switch (argv[0][0]) { 93 case 'n': 94 if (chmod(name, sb.st_mode & ~(S_IXUSR | S_IXGRP)) < 0) 95 err(2, "%s", name); 96 break; 97 case 'y': 98 if (chmod(name, (sb.st_mode & ~(S_IXUSR | S_IXGRP)) | S_IXUSR) 99 < 0) 100 err(2, "%s", name); 101 break; 102 case 'b': 103 if (chmod(name, (sb.st_mode & ~(S_IXUSR | S_IXGRP)) | S_IXGRP) 104 < 0) 105 err(2, "%s", name); 106 break; 107 default: 108 usage(); 109 } 110 return (sb.st_mode & (S_IXUSR | S_IXGRP) ? 0 : 1); 111} 112 113static void 114usage() 115{ 116 (void)fprintf(stderr, "usage: biff [n | y | b]\n"); 117 exit(2); 118} 119