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 #if 0
40 static char sccsid[] = "@(#)yes.c 8.1 (Berkeley) 6/6/93";
41 #else
42 static const char rcsid[] = "$FreeBSD$";
43 #endif
44 #endif /* not lint */
45
46 #include <capsicum_helpers.h>
47 #include <err.h>
48 #include <stdio.h>
49 #include <string.h>
50 #include <unistd.h>
51
52 int
main(int argc,char ** argv)53 main(int argc, char **argv)
54 {
55 char buf[8192];
56 char y[2] = { 'y', '\n' };
57 char * exp = y;
58 size_t buflen = 0;
59 size_t explen = sizeof(y);
60 size_t more;
61 ssize_t ret;
62
63 if (caph_limit_stdio() < 0 || caph_enter() < 0)
64 err(1, "capsicum");
65
66 if (argc > 1) {
67 exp = argv[1];
68 explen = strlen(exp) + 1;
69 exp[explen - 1] = '\n';
70 }
71
72 if (explen <= sizeof(buf)) {
73 while (buflen < sizeof(buf) - explen) {
74 memcpy(buf + buflen, exp, explen);
75 buflen += explen;
76 }
77 exp = buf;
78 explen = buflen;
79 }
80
81 more = explen;
82 while ((ret = write(STDOUT_FILENO, exp + (explen - more), more)) > 0)
83 if ((more -= ret) == 0)
84 more = explen;
85
86 err(1, "stdout");
87 /*NOTREACHED*/
88 }
89