1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2009 Hudson River Trading LLC
5 * Written by: George V. Neville-Neil <gnn@FreeBSD.org>
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 #include <sys/errno.h>
32
33 #include <err.h>
34 #include <locale.h>
35 #include <stdio.h>
36 #include <stdlib.h>
37 #include <string.h>
38
39 #include <capsicum_helpers.h>
40
41 static void usage(void) __dead2;
42
43 int
main(int argc,char ** argv)44 main(int argc, char **argv)
45 {
46 char *cp;
47 char *errstr;
48 long errnum;
49
50 (void) setlocale(LC_MESSAGES, "");
51
52 caph_cache_catpages();
53 if (caph_limit_stdio() < 0 || caph_enter() < 0)
54 err(EXIT_FAILURE, "capsicum");
55
56 if (argc != 2)
57 usage();
58
59 errno = 0;
60
61 errnum = strtol(argv[1], &cp, 0);
62
63 if (errno != 0)
64 err(EXIT_FAILURE, NULL);
65
66 if ((errstr = strerror(errnum)) == NULL)
67 err(EXIT_FAILURE, NULL);
68
69 printf("%s\n", errstr);
70
71 exit(EXIT_SUCCESS);
72 }
73
74 static void
usage(void)75 usage(void)
76 {
77 fprintf(stderr, "usage: perror number\n");
78 exit(EXIT_FAILURE);
79 }
80
81