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45 lines
1.4 KiB
C
45 lines
1.4 KiB
C
/* Copyright (C) 1991-2014 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <libintl.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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/* Return a string describing the errno code in ERRNUM.
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The storage is good only until the next call to strerror.
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Writing to the storage causes undefined behavior. */
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libc_freeres_ptr (static char *buf);
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char *
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strerror (errnum)
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int errnum;
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{
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char *ret = __strerror_r (errnum, NULL, 0);
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int saved_errno;
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if (__builtin_expect (ret != NULL, 1))
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return ret;
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saved_errno = errno;
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if (buf == NULL)
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buf = malloc (1024);
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__set_errno (saved_errno);
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if (buf == NULL)
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return _("Unknown error");
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return __strerror_r (errnum, buf, 1024);
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}
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