perror_test.c revision 108088 
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: head/tools/regression/lib/libc/stdio/test-perror.c 108088 2002-12-19 09:46:10Z tjr $");
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
44static void cleanup(void);
45static char tmpfil[PATH_MAX];
46
47int
48main(int argc, char *argv[])
49{
50	char lbuf[512];
51	int i;
52	char *s;
53
54	strcpy(tmpfil, _PATH_TMP "perror.XXXXXXXX");
55	if (mkstemp(tmpfil) < 0)
56		err(1, "mkstemp");
57	atexit(cleanup);
58	/* Reopen stderr on a file descriptor other than 2. */
59	fclose(stderr);
60	for (i = 0; i < 3; i++)
61		dup(0);
62	if (freopen(tmpfil, "r+", stderr) == NULL)
63		err(1, "%s", tmpfil);
64
65	/*
66	 * Test that perror() doesn't call strerror() (4.4BSD bug),
67	 * the two ways of omitting a program name, and the formatting when
68	 * a program name is specified.
69	 */
70	s = strerror(ENOENT);
71	assert(strcmp(s, "No such file or directory") == 0);
72	errno = EPERM;
73	perror(NULL);
74	perror("");
75	perror("test-perror");
76	assert(strcmp(s, "No such file or directory") == 0);
77
78	/*
79	 * Read it back to check...
80	 */
81	rewind(stderr);
82	s = fgets(lbuf, sizeof(lbuf), stderr);
83	assert(s != NULL);
84	assert(strcmp(s, "Operation not permitted\n") == 0);
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, "test-perror: Operation not permitted\n") == 0);
91	s = fgets(lbuf, sizeof(lbuf), stderr);
92	assert(s == NULL);
93	fclose(stderr);
94
95	printf("PASS perror()\n");
96
97	return (0);
98}
99
100static void
101cleanup(void)
102{
103
104	unlink(tmpfil);
105}
106