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1d44530a5b
For strerror, this fixes commit 28aff04781 ("string:
Implement strerror in terms of strerror_l"). This commit avoids
returning NULL for strerror_l as well, although POSIX allows this
behavior for strerror_l.
Reviewed-by: Arjun Shankar <arjun@redhat.com>
64 lines
1.9 KiB
C
64 lines
1.9 KiB
C
/* Copyright (C) 2007-2023 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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<https://www.gnu.org/licenses/>. */
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#include <libintl.h>
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#include <locale.h>
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#include <stdio.h>
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#include <string.h>
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#include <tls-internal.h>
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static const char *
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translate (const char *str, locale_t loc)
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{
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locale_t oldloc = __uselocale (loc);
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const char *res = _(str);
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__uselocale (oldloc);
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return res;
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}
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/* Return a string describing the errno code in ERRNUM. */
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char *
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__strerror_l (int errnum, locale_t loc)
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{
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int saved_errno = errno;
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char *err = (char *) __get_errlist (errnum);
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if (__glibc_unlikely (err == NULL))
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{
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struct tls_internal_t *tls_internal = __glibc_tls_internal ();
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free (tls_internal->strerror_l_buf);
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if (__asprintf (&tls_internal->strerror_l_buf, "%s%d",
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translate ("Unknown error ", loc), errnum) > 0)
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err = tls_internal->strerror_l_buf;
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else
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{
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/* The memory was freed above. */
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tls_internal->strerror_l_buf = NULL;
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/* Provide a fallback translation. */
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err = (char *) translate ("Unknown error", loc);
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}
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}
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else
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err = (char *) translate (err, loc);
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__set_errno (saved_errno);
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return err;
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}
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weak_alias (__strerror_l, strerror_l)
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libc_hidden_def (__strerror_l)
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