1 /* Copyright (C) 1991-2015 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
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.
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
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
23 /* Return a string describing the errno code in ERRNUM.
24 The storage is good only until the next call to strerror.
25 Writing to the storage causes undefined behavior. */
26 libc_freeres_ptr (static char *buf);
32 char *ret = __strerror_r (errnum, NULL, 0);
35 if (__glibc_likely (ret != NULL))
40 __set_errno (saved_errno);
42 return _("Unknown error");
43 return __strerror_r (errnum, buf, 1024);