1 /* Test of strerror() function.
2 Copyright (C) 2007-2012 Free Software Foundation, Inc.
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3, or (at your option)
7 any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
17
18 /* Written by Eric Blake <ebb9@byu.net>, 2007. */
19
20 #include <config.h>
21
22 #include <string.h>
23
24 #include "signature.h"
25 SIGNATURE_CHECK (strerror, char *, (int));
26
27 #include <errno.h>
28
29 #include "macros.h"
30
31 int
main(void)32 main (void)
33 {
34 char *str;
35
36 errno = 0;
37 str = strerror (EACCES);
38 ASSERT (str);
39 ASSERT (*str);
40 ASSERT (errno == 0);
41
42 errno = 0;
43 str = strerror (ETIMEDOUT);
44 ASSERT (str);
45 ASSERT (*str);
46 ASSERT (errno == 0);
47
48 errno = 0;
49 str = strerror (EOVERFLOW);
50 ASSERT (str);
51 ASSERT (*str);
52 ASSERT (errno == 0);
53
54 /* POSIX requires strerror (0) to succeed. Reject use of "Unknown
55 error", but allow "Success", "No error", or even Solaris' "Error
56 0" which are distinct patterns from true out-of-range strings.
57 http://austingroupbugs.net/view.php?id=382 */
58 errno = 0;
59 str = strerror (0);
60 ASSERT (str);
61 ASSERT (*str);
62 ASSERT (errno == 0);
63 ASSERT (strstr (str, "nknown") == NULL);
64 ASSERT (strstr (str, "ndefined") == NULL);
65
66 /* POSIX requires strerror to produce a non-NULL result for all
67 inputs; as an extension, we also guarantee a non-empty reseult.
68 Reporting EINVAL is optional. */
69 errno = 0;
70 str = strerror (-3);
71 ASSERT (str);
72 ASSERT (*str);
73 ASSERT (errno == 0 || errno == EINVAL);
74
75 return 0;
76 }
77