1331722Seadler/* 21590Srgrimes * Copyright (c) 1987, 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 * 4. Neither the name of the University nor the names of its contributors 141590Srgrimes * may be used to endorse or promote products derived from this software 151590Srgrimes * without specific prior written permission. 161590Srgrimes * 171590Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 181590Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 191590Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 201590Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 211590Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 221590Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 231590Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 241590Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 251590Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 261590Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 271590Srgrimes * SUCH DAMAGE. 281590Srgrimes */ 291590Srgrimes 301590Srgrimes#ifndef lint 3160987Skrisstatic const char copyright[] = 321590Srgrimes"@(#) Copyright (c) 1987, 1993\n\ 331590Srgrimes The Regents of the University of California. All rights reserved.\n"; 341590Srgrimes#endif /* not lint */ 351590Srgrimes 361590Srgrimes#ifndef lint 3760987Skris#if 0 381590Srgrimesstatic char sccsid[] = "@(#)yes.c 8.1 (Berkeley) 6/6/93"; 3960987Skris#else 4060987Skrisstatic const char rcsid[] = "$FreeBSD: stable/11/usr.bin/yes/yes.c 332464 2018-04-13 03:32:18Z kevans $"; 4160987Skris#endif 421590Srgrimes#endif /* not lint */ 431590Srgrimes 44332463Skevans#include <capsicum_helpers.h> 45106706Sdwmalone#include <err.h> 4660987Skris#include <stdio.h> 47332464Skevans#include <string.h> 48332464Skevans#include <unistd.h> 4960987Skris 5060987Skrisint 51102944Sdwmalonemain(int argc, char **argv) 521590Srgrimes{ 53332464Skevans char buf[8192]; 54332464Skevans char y[2] = { 'y', '\n' }; 55332464Skevans char * exp = y; 56332464Skevans size_t buflen = 0; 57332464Skevans size_t explen = sizeof(y); 58332464Skevans size_t more; 59332464Skevans ssize_t ret; 60332463Skevans 61332463Skevans if (caph_limit_stdio() < 0 || (cap_enter() < 0 && errno != ENOSYS)) 62332463Skevans err(1, "capsicum"); 63332463Skevans 64332464Skevans if (argc > 1) { 65332464Skevans exp = argv[1]; 66332464Skevans explen = strlen(exp) + 1; 67332464Skevans exp[explen - 1] = '\n'; 68332464Skevans } 69332464Skevans 70332464Skevans if (explen <= sizeof(buf)) { 71332464Skevans while (buflen < sizeof(buf) - explen) { 72332464Skevans memcpy(buf + buflen, exp, explen); 73332464Skevans buflen += explen; 74332464Skevans } 75332464Skevans exp = buf; 76332464Skevans explen = buflen; 77332464Skevans } 78332464Skevans 79332464Skevans more = explen; 80332464Skevans while ((ret = write(STDOUT_FILENO, exp + (explen - more), more)) > 0) 81332464Skevans if ((more -= ret) == 0) 82332464Skevans more = explen; 83332464Skevans 84106608Stjr err(1, "stdout"); 85106608Stjr /*NOTREACHED*/ 861590Srgrimes} 87