1 /* $OpenBSD: biff.c,v 1.15 2016/07/07 09:26:25 semarie Exp $ */ 2 /* $NetBSD: biff.c,v 1.3 1995/03/26 02:34:22 glass Exp $ */ 3 4 /* 5 * Copyright (c) 1980, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #include <sys/types.h> 34 #include <sys/stat.h> 35 36 #include <err.h> 37 #include <errno.h> 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <unistd.h> 42 43 static void usage(void); 44 45 int 46 main(int argc, char *argv[]) 47 { 48 struct stat sb; 49 int ch; 50 char *name; 51 52 if (pledge("stdio rpath fattr", NULL) == -1) 53 err(2, "pledge"); 54 55 while ((ch = getopt(argc, argv, "")) != -1) 56 switch(ch) { 57 case '?': 58 default: 59 usage(); 60 } 61 argc -= optind; 62 argv += optind; 63 64 if ((name = ttyname(STDERR_FILENO)) == NULL) 65 err(2, "tty"); 66 67 if (stat(name, &sb)) 68 err(2, "stat"); 69 70 sb.st_mode &= ACCESSPERMS; 71 72 if (*argv == NULL) { 73 (void)printf("is %s\n", sb.st_mode & S_IXUSR ? "y" : "n"); 74 exit(sb.st_mode & S_IXUSR ? 0 : 1); 75 } 76 77 switch(argv[0][0]) { 78 case 'n': 79 if (chmod(name, sb.st_mode & ~S_IXUSR) < 0) 80 err(2, "%s", name); 81 break; 82 case 'y': 83 if (chmod(name, sb.st_mode | S_IXUSR) < 0) 84 err(2, "%s", name); 85 break; 86 default: 87 usage(); 88 } 89 exit(sb.st_mode & S_IXUSR ? 0 : 1); 90 } 91 92 static void 93 usage(void) 94 { 95 (void)fprintf(stderr, "usage: biff [n | y]\n"); 96 exit(2); 97 } 98