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- /* Safe version of strerror for GDB, the GNU debugger.
- Copyright (C) 2006-2022 Free Software Foundation, Inc.
- This file is part of GDB.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
- This program 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 General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>. */
- #include "common-defs.h"
- #include <string.h>
- /* There are two different versions of strerror_r; one is GNU-specific, the
- other XSI-compliant. They differ in the return type. This overload lets
- us choose the right behavior for each return type. We cannot rely on Gnulib
- to solve this for us because IPA does not use Gnulib but uses this
- function. */
- /* Called if we have a XSI-compliant strerror_r. */
- ATTRIBUTE_UNUSED static char *
- select_strerror_r (int res, char *buf)
- {
- return res == 0 ? buf : nullptr;
- }
- /* Called if we have a GNU strerror_r. */
- ATTRIBUTE_UNUSED static char *
- select_strerror_r (char *res, char *)
- {
- return res;
- }
- /* Implementation of safe_strerror as defined in common-utils.h. */
- const char *
- safe_strerror (int errnum)
- {
- static thread_local char buf[1024];
- char *res = select_strerror_r (strerror_r (errnum, buf, sizeof (buf)), buf);
- if (res != nullptr)
- return res;
- xsnprintf (buf, sizeof buf, "(undocumented errno %d)", errnum);
- return buf;
- }
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