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04277e02 | 1 | /* Copyright (C) 1991-2019 Free Software Foundation, Inc. |
6d52618b | 2 | This file is part of the GNU C Library. |
28f540f4 | 3 | |
6d52618b | 4 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
28f540f4 | 8 | |
6d52618b UD |
9 | The GNU C Library 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 GNU | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
28f540f4 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
28f540f4 | 17 | |
c877418f | 18 | #include <libintl.h> |
28f540f4 RM |
19 | #include <stdio.h> |
20 | #include <string.h> | |
c877418f | 21 | #include <errno.h> |
28f540f4 | 22 | |
6d52618b | 23 | /* Return a string describing the errno code in ERRNUM. |
28f540f4 RM |
24 | The storage is good only until the next call to strerror. |
25 | Writing to the storage causes undefined behavior. */ | |
c877418f RM |
26 | libc_freeres_ptr (static char *buf); |
27 | ||
28f540f4 | 28 | char * |
9d46370c | 29 | strerror (int errnum) |
28f540f4 | 30 | { |
c877418f RM |
31 | char *ret = __strerror_r (errnum, NULL, 0); |
32 | int saved_errno; | |
33 | ||
a1ffb40e | 34 | if (__glibc_likely (ret != NULL)) |
c877418f RM |
35 | return ret; |
36 | saved_errno = errno; | |
37 | if (buf == NULL) | |
38 | buf = malloc (1024); | |
39 | __set_errno (saved_errno); | |
40 | if (buf == NULL) | |
41 | return _("Unknown error"); | |
42 | return __strerror_r (errnum, buf, 1024); | |
28f540f4 | 43 | } |