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/* Test of strerror() function.
Copyright (C) 2007-2021 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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