biff.c revision 201382
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. 321590Srgrimes */ 331590Srgrimes 341590Srgrimes#ifndef lint 3541568Sarchiestatic const char copyright[] = 361590Srgrimes"@(#) Copyright (c) 1980, 1993\n\ 371590Srgrimes The Regents of the University of California. All rights reserved.\n"; 3887258Smarkm#endif 391590Srgrimes 4087628Sdwmalone#if 0 411590Srgrimes#ifndef lint 4287628Sdwmalonestatic char sccsid[] = "@(#)biff.c 8.1 (Berkeley) 6/6/93"; 4387258Smarkm#endif 4487628Sdwmalone#endif 451590Srgrimes 4687628Sdwmalone#include <sys/cdefs.h> 4787628Sdwmalone__FBSDID("$FreeBSD: head/usr.bin/biff/biff.c 201382 2010-01-02 10:09:20Z ed $"); 4887628Sdwmalone 491590Srgrimes#include <sys/stat.h> 5090722Smike 5187749Scharnier#include <err.h> 5287749Scharnier#include <stdio.h> 5390722Smike#include <stdlib.h> 541590Srgrimes#include <unistd.h> 551590Srgrimes 5692920Simpstatic void usage(void); 571590Srgrimes 5832069Salexint 59100626Srobertmain(int argc, 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 75100614Srobert if ((name = ttyname(STDIN_FILENO)) == NULL && 76100614Srobert (name = ttyname(STDOUT_FILENO)) == NULL && 77100614Srobert (name = ttyname(STDERR_FILENO)) == NULL) 7826836Scharnier err(2, "unknown tty"); 791590Srgrimes 801590Srgrimes if (stat(name, &sb)) 8126836Scharnier err(2, "stat"); 821590Srgrimes 831590Srgrimes if (*argv == NULL) { 84100443Sjohan (void)printf("is %s\n", 8599632Sjohan sb.st_mode & S_IXUSR ? "y" : 8699632Sjohan sb.st_mode & S_IXGRP ? "b" : "n"); 87100627Srobert return (sb.st_mode & (S_IXUSR | S_IXGRP) ? 0 : 1); 8899632Sjohan 891590Srgrimes } 901590Srgrimes 91100627Srobert switch (argv[0][0]) { 921590Srgrimes case 'n': 9399632Sjohan if (chmod(name, sb.st_mode & ~(S_IXUSR | S_IXGRP)) < 0) 9462889Skris err(2, "%s", name); 951590Srgrimes break; 961590Srgrimes case 'y': 97100627Srobert if (chmod(name, (sb.st_mode & ~(S_IXUSR | S_IXGRP)) | S_IXUSR) 98100627Srobert < 0) 9962889Skris err(2, "%s", name); 1001590Srgrimes break; 10199632Sjohan case 'b': 102100627Srobert if (chmod(name, (sb.st_mode & ~(S_IXUSR | S_IXGRP)) | S_IXGRP) 103100627Srobert < 0) 10499632Sjohan err(2, "%s", name); 10599632Sjohan break; 1061590Srgrimes default: 1071590Srgrimes usage(); 1081590Srgrimes } 109100627Srobert return (sb.st_mode & (S_IXUSR | S_IXGRP) ? 0 : 1); 1101590Srgrimes} 1111590Srgrimes 1121590Srgrimesstatic void 113201382Sedusage(void) 1141590Srgrimes{ 11599632Sjohan (void)fprintf(stderr, "usage: biff [n | y | b]\n"); 1161590Srgrimes exit(2); 1171590Srgrimes} 118