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/* Copyright (C) 1991-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <libintl.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
/* Return a string describing the errno code in ERRNUM.
The storage is good only until the next call to strerror.
Writing to the storage causes undefined behavior. */
libc_freeres_ptr (static char *buf);
char *
strerror (int errnum)
{
char *ret = __strerror_r (errnum, NULL, 0);
int saved_errno;
if (__glibc_likely (ret != NULL))
return ret;
saved_errno = errno;
if (buf == NULL)
buf = malloc (1024);
__set_errno (saved_errno);
if (buf == NULL)
return _("Unknown error");
return __strerror_r (errnum, buf, 1024);
}
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