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 <stdio.h>
32 #include <stdlib.h>
33 #include <string.h>
34 #include <err.h>
35 #include <locale.h>
36 #include <sys/errno.h>
37
38 static void usage(void) __dead2;
39
40 int
main(int argc,char ** argv)41 main(int argc, char **argv)
42 {
43 char *cp;
44 char *errstr;
45 long errnum;
46
47 (void) setlocale(LC_MESSAGES, "");
48 if (argc != 2)
49 usage();
50
51 errno = 0;
52
53 errnum = strtol(argv[1], &cp, 0);
54
55 if (errno != 0)
56 err(1, NULL);
57
58 if ((errstr = strerror(errnum)) == NULL)
59 err(1, NULL);
60
61 printf("%s\n", errstr);
62
63 exit(0);
64 }
65
66 static void
usage(void)67 usage(void)
68 {
69 fprintf(stderr, "usage: perror number\n");
70 exit(1);
71 }
72
73