biff.c revision 26836
11590Srgrimes/* 21590Srgrimes * Copyright (c) 1980, 1993 31590Srgrimes * The Regents of the University of California. All rights reserved. 41590Srgrimes * 51590Srgrimes * Redistribution and use in source and binary forms, with or without 61590Srgrimes * modification, are permitted provided that the following conditions 71590Srgrimes * are met: 81590Srgrimes * 1. Redistributions of source code must retain the above copyright 91590Srgrimes * notice, this list of conditions and the following disclaimer. 101590Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111590Srgrimes * notice, this list of conditions and the following disclaimer in the 121590Srgrimes * documentation and/or other materials provided with the distribution. 131590Srgrimes * 3. All advertising materials mentioning features or use of this software 141590Srgrimes * must display the following acknowledgement: 151590Srgrimes * This product includes software developed by the University of 161590Srgrimes * California, Berkeley and its contributors. 171590Srgrimes * 4. Neither the name of the University nor the names of its contributors 181590Srgrimes * may be used to endorse or promote products derived from this software 191590Srgrimes * without specific prior written permission. 201590Srgrimes * 211590Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221590Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231590Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241590Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251590Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261590Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271590Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281590Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291590Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301590Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311590Srgrimes * SUCH DAMAGE. 3226836Scharnier * 3326836Scharnier * $Id$ 341590Srgrimes */ 351590Srgrimes 361590Srgrimes#ifndef lint 371590Srgrimesstatic char copyright[] = 381590Srgrimes"@(#) Copyright (c) 1980, 1993\n\ 391590Srgrimes The Regents of the University of California. All rights reserved.\n"; 401590Srgrimes#endif /* not lint */ 411590Srgrimes 421590Srgrimes#ifndef lint 431590Srgrimesstatic char sccsid[] = "@(#)biff.c 8.1 (Berkeley) 6/6/93"; 441590Srgrimes#endif /* not lint */ 451590Srgrimes 461590Srgrimes#include <sys/types.h> 471590Srgrimes#include <sys/stat.h> 481590Srgrimes#include <errno.h> 491590Srgrimes#include <unistd.h> 501590Srgrimes#include <stdio.h> 511590Srgrimes#include <stdlib.h> 521590Srgrimes#include <string.h> 5326836Scharnier#include <err.h> 541590Srgrimes 551590Srgrimesstatic void usage __P((void)); 561590Srgrimes 571590Srgrimesmain(argc, argv) 581590Srgrimes int argc; 591590Srgrimes char *argv[]; 601590Srgrimes{ 611590Srgrimes struct stat sb; 621590Srgrimes int ch; 631590Srgrimes char *name; 641590Srgrimes 651590Srgrimes 6624360Simp while ((ch = getopt(argc, argv, "")) != -1) 671590Srgrimes switch(ch) { 681590Srgrimes case '?': 691590Srgrimes default: 701590Srgrimes usage(); 711590Srgrimes } 721590Srgrimes argc -= optind; 731590Srgrimes argv += optind; 741590Srgrimes 7526836Scharnier if ((name = ttyname(STDERR_FILENO)) == NULL) 7626836Scharnier err(2, "unknown tty"); 771590Srgrimes 781590Srgrimes if (stat(name, &sb)) 7926836Scharnier err(2, "stat"); 801590Srgrimes 811590Srgrimes if (*argv == NULL) { 821590Srgrimes (void)printf("is %s\n", sb.st_mode&0100 ? "y" : "n"); 831590Srgrimes exit(sb.st_mode & 0100 ? 0 : 1); 841590Srgrimes } 851590Srgrimes 861590Srgrimes switch(argv[0][0]) { 871590Srgrimes case 'n': 881590Srgrimes if (chmod(name, sb.st_mode & ~0100) < 0) 8926836Scharnier err(2, name); 901590Srgrimes break; 911590Srgrimes case 'y': 921590Srgrimes if (chmod(name, sb.st_mode | 0100) < 0) 9326836Scharnier err(2, name); 941590Srgrimes break; 951590Srgrimes default: 961590Srgrimes usage(); 971590Srgrimes } 981590Srgrimes exit(sb.st_mode & 0100 ? 0 : 1); 991590Srgrimes} 1001590Srgrimes 1011590Srgrimesstatic void 1021590Srgrimesusage() 1031590Srgrimes{ 1041590Srgrimes (void)fprintf(stderr, "usage: biff [y | n]\n"); 1051590Srgrimes exit(2); 1061590Srgrimes} 107