perror_test.c revision 137587 
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 137587 2004-11-11 19:47:55Z nik $");
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	printf("1..1\n");
55
56	strcpy(tmpfil, _PATH_TMP "perror.XXXXXXXX");
57	if (mkstemp(tmpfil) < 0)
58		err(1, "mkstemp");
59	atexit(cleanup);
60	/* Reopen stderr on a file descriptor other than 2. */
61	fclose(stderr);
62	for (i = 0; i < 3; i++)
63		dup(0);
64	if (freopen(tmpfil, "r+", stderr) == NULL)
65		err(1, "%s", tmpfil);
66
67	/*
68	 * Test that perror() doesn't call strerror() (4.4BSD bug),
69	 * the two ways of omitting a program name, and the formatting when
70	 * a program name is specified.
71	 */
72	s = strerror(ENOENT);
73	assert(strcmp(s, "No such file or directory") == 0);
74	errno = EPERM;
75	perror(NULL);
76	perror("");
77	perror("test-perror");
78	assert(strcmp(s, "No such file or directory") == 0);
79
80	/*
81	 * Read it back to check...
82	 */
83	rewind(stderr);
84	s = fgets(lbuf, sizeof(lbuf), stderr);
85	assert(s != NULL);
86	assert(strcmp(s, "Operation not permitted\n") == 0);
87	s = fgets(lbuf, sizeof(lbuf), stderr);
88	assert(s != NULL);
89	assert(strcmp(s, "Operation not permitted\n") == 0);
90	s = fgets(lbuf, sizeof(lbuf), stderr);
91	assert(s != NULL);
92	assert(strcmp(s, "test-perror: Operation not permitted\n") == 0);
93	s = fgets(lbuf, sizeof(lbuf), stderr);
94	assert(s == NULL);
95	fclose(stderr);
96
97	printf("ok 1 - perror()\n");
98
99	return (0);
100}
101
102static void
103cleanup(void)
104{
105
106	unlink(tmpfil);
107}
108