/* Test of strerror() function.
- Copyright (C) 2007-2009 Free Software Foundation, Inc.
+ Copyright (C) 2007-2013 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software Foundation,
- Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+ along with this program; if not, see <http://www.gnu.org/licenses/>. */
/* Written by Eric Blake <ebb9@byu.net>, 2007. */
SIGNATURE_CHECK (strerror, char *, (int));
#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-
-#define ASSERT(expr) \
- do \
- { \
- if (!(expr)) \
- { \
- fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
- fflush (stderr); \
- abort (); \
- } \
- } \
- while (0)
+
+#include "macros.h"
int
main (void)
{
char *str;
+ errno = 0;
str = strerror (EACCES);
ASSERT (str);
ASSERT (*str);
+ ASSERT (errno == 0);
+ errno = 0;
str = strerror (ETIMEDOUT);
ASSERT (str);
ASSERT (*str);
+ ASSERT (errno == 0);
+ errno = 0;
str = strerror (EOVERFLOW);
ASSERT (str);
ASSERT (*str);
+ ASSERT (errno == 0);
+ /* POSIX requires strerror (0) to succeed. Reject use of "Unknown
+ error", but allow "Success", "No error", or even Solaris' "Error
+ 0" which are distinct patterns from true out-of-range strings.
+ http://austingroupbugs.net/view.php?id=382 */
+ errno = 0;
str = strerror (0);
ASSERT (str);
ASSERT (*str);
-
+ ASSERT (errno == 0);
+ ASSERT (strstr (str, "nknown") == NULL);
+ ASSERT (strstr (str, "ndefined") == NULL);
+
+ /* POSIX requires strerror to produce a non-NULL result for all
+ inputs; as an extension, we also guarantee a non-empty result.
+ Reporting EINVAL is optional. */
+ errno = 0;
str = strerror (-3);
ASSERT (str);
ASSERT (*str);
+ ASSERT (errno == 0 || errno == EINVAL);
return 0;
}