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/* Test of strerror() function.
Copyright (C) 2007-2023 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
the Free Software Foundation, either version 3, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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, see <https://www.gnu.org/licenses/>. */
/* Written by Eric Blake <ebb9@byu.net>, 2007. */
#include <config.h>
#include <string.h>
#include "signature.h"
SIGNATURE_CHECK (strerror, char *, (int));
#include <errno.h>
#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;
}
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