1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1987, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef lint 33 static const char copyright[] = 34 "@(#) Copyright (c) 1987, 1993\n\ 35 The Regents of the University of California. All rights reserved.\n"; 36 #endif /* not lint */ 37 38 #ifndef lint 39 #endif /* not lint */ 40 41 #include <capsicum_helpers.h> 42 #include <err.h> 43 #include <stdio.h> 44 #include <string.h> 45 #include <unistd.h> 46 47 int 48 main(int argc, char **argv) 49 { 50 char buf[8192]; 51 char y[2] = { 'y', '\n' }; 52 char * exp = y; 53 size_t buflen = 0; 54 size_t explen = sizeof(y); 55 size_t more; 56 ssize_t ret; 57 58 if (caph_limit_stdio() < 0 || caph_enter() < 0) 59 err(1, "capsicum"); 60 61 if (argc > 1) { 62 exp = argv[1]; 63 explen = strlen(exp) + 1; 64 exp[explen - 1] = '\n'; 65 } 66 67 if (explen <= sizeof(buf)) { 68 while (buflen < sizeof(buf) - explen) { 69 memcpy(buf + buflen, exp, explen); 70 buflen += explen; 71 } 72 exp = buf; 73 explen = buflen; 74 } 75 76 more = explen; 77 while ((ret = write(STDOUT_FILENO, exp + (explen - more), more)) > 0) 78 if ((more -= ret) == 0) 79 more = explen; 80 81 err(1, "stdout"); 82 /*NOTREACHED*/ 83 } 84