1/*-
2 * Copyright (c) 2002 Tim J. Robbins
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27/*
28 * Test program for perror() as specified by IEEE Std. 1003.1-2001 and
29 * ISO/IEC 9899:1999.
30 */
31
32#include <sys/cdefs.h>
33__FBSDID("$FreeBSD$");
34
35#include <assert.h>
36#include <err.h>
37#include <errno.h>
38#include <limits.h>
39#include <paths.h>
40#include <stdio.h>
41#include <stdlib.h>
42#include <string.h>
43#include <unistd.h>
44
45static void cleanup(void);
46static char tmpfil[PATH_MAX];
47
48int
49main(int argc, char *argv[])
50{
51	char lbuf[512];
52	int i;
53	char *s;
54
55	printf("1..1\n");
56
57	strcpy(tmpfil, _PATH_TMP "perror.XXXXXXXX");
58	if (mkstemp(tmpfil) < 0)
59		err(1, "mkstemp");
60	atexit(cleanup);
61	/* Reopen stderr on a file descriptor other than 2. */
62	fclose(stderr);
63	for (i = 0; i < 3; i++)
64		dup(0);
65	if (freopen(tmpfil, "r+", stderr) == NULL)
66		err(1, "%s", tmpfil);
67
68	/*
69	 * Test that perror() doesn't call strerror() (4.4BSD bug),
70	 * the two ways of omitting a program name, and the formatting when
71	 * a program name is specified.
72	 */
73	s = strerror(ENOENT);
74	assert(strcmp(s, "No such file or directory") == 0);
75	errno = EPERM;
76	perror(NULL);
77	perror("");
78	perror("test-perror");
79	assert(strcmp(s, "No such file or directory") == 0);
80
81	/*
82	 * Read it back to check...
83	 */
84	rewind(stderr);
85	s = fgets(lbuf, sizeof(lbuf), stderr);
86	assert(s != NULL);
87	assert(strcmp(s, "Operation not permitted\n") == 0);
88	s = fgets(lbuf, sizeof(lbuf), stderr);
89	assert(s != NULL);
90	assert(strcmp(s, "Operation not permitted\n") == 0);
91	s = fgets(lbuf, sizeof(lbuf), stderr);
92	assert(s != NULL);
93	assert(strcmp(s, "test-perror: Operation not permitted\n") == 0);
94	s = fgets(lbuf, sizeof(lbuf), stderr);
95	assert(s == NULL);
96	fclose(stderr);
97
98	printf("ok 1 - perror()\n");
99
100	return (0);
101}
102
103static void
104cleanup(void)
105{
106
107	unlink(tmpfil);
108}
109