| 1 | /* Test of strerror() function.
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| 2 | Copyright (C) 2007-2021 Free Software Foundation, Inc.
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| 3 |
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| 4 | This program is free software; you can redistribute it and/or modify
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| 5 | it under the terms of the GNU General Public License as published by
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| 6 | the Free Software Foundation; either version 3, or (at your option)
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| 7 | any later version.
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| 8 |
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| 9 | This program is distributed in the hope that it will be useful,
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 12 | GNU General Public License for more details.
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| 13 |
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| 14 | You should have received a copy of the GNU General Public License
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| 15 | along with this program; if not, see <https://www.gnu.org/licenses/>. */
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| 16 |
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| 17 | /* Written by Eric Blake <ebb9@byu.net>, 2007. */
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| 18 |
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| 19 | #include <config.h>
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| 20 |
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| 21 | #include <string.h>
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| 22 |
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| 23 | #include "signature.h"
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| 24 | SIGNATURE_CHECK (strerror, char *, (int));
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| 25 |
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| 26 | #include <errno.h>
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| 27 |
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| 28 | #include "macros.h"
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| 29 |
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| 30 | int
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| 31 | main (void)
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| 32 | {
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| 33 | char *str;
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| 34 |
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| 35 | errno = 0;
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| 36 | str = strerror (EACCES);
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| 37 | ASSERT (str);
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| 38 | ASSERT (*str);
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| 39 | ASSERT (errno == 0);
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| 40 |
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| 41 | errno = 0;
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| 42 | str = strerror (ETIMEDOUT);
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| 43 | ASSERT (str);
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| 44 | ASSERT (*str);
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| 45 | ASSERT (errno == 0);
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| 46 |
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| 47 | errno = 0;
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| 48 | str = strerror (EOVERFLOW);
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| 49 | ASSERT (str);
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| 50 | ASSERT (*str);
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| 51 | ASSERT (errno == 0);
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| 52 |
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| 53 | /* POSIX requires strerror (0) to succeed. Reject use of "Unknown
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| 54 | error", but allow "Success", "No error", or even Solaris' "Error
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| 55 | 0" which are distinct patterns from true out-of-range strings.
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| 56 | http://austingroupbugs.net/view.php?id=382 */
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| 57 | errno = 0;
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| 58 | str = strerror (0);
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| 59 | ASSERT (str);
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| 60 | ASSERT (*str);
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| 61 | ASSERT (errno == 0);
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| 62 | ASSERT (strstr (str, "nknown") == NULL);
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| 63 | ASSERT (strstr (str, "ndefined") == NULL);
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| 64 |
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| 65 | /* POSIX requires strerror to produce a non-NULL result for all
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| 66 | inputs; as an extension, we also guarantee a non-empty result.
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| 67 | Reporting EINVAL is optional. */
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| 68 | errno = 0;
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| 69 | str = strerror (-3);
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| 70 | ASSERT (str);
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| 71 | ASSERT (*str);
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| 72 | ASSERT (errno == 0 || errno == EINVAL);
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| 73 |
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| 74 | return 0;
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| 75 | }
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