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cd850b40 | 1 | /* Safe version of strerror for GDB, the GNU debugger. |
fb23d554 | 2 | |
b811d2c2 | 3 | Copyright (C) 2006-2020 Free Software Foundation, Inc. |
fb23d554 SDJ |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "common-defs.h" | |
5abebf3c | 21 | #include <string.h> |
fb23d554 | 22 | |
ab7d13f0 CB |
23 | /* There are two different versions of strerror_r; one is GNU-specific, the |
24 | other XSI-compliant. They differ in the return type. This overload lets | |
25 | us choose the right behavior for each return type. We cannot rely on Gnulib | |
26 | to solve this for us because IPA does not use Gnulib but uses this | |
27 | function. */ | |
28 | ||
29 | /* Called if we have a XSI-compliant strerror_r. */ | |
39f34d7b | 30 | ATTRIBUTE_UNUSED static char * |
ab7d13f0 CB |
31 | select_strerror_r (int res, char *buf) |
32 | { | |
33 | return res == 0 ? buf : nullptr; | |
34 | } | |
35 | ||
36 | /* Called if we have a GNU strerror_r. */ | |
39f34d7b | 37 | ATTRIBUTE_UNUSED static char * |
ab7d13f0 CB |
38 | select_strerror_r (char *res, char *) |
39 | { | |
40 | return res; | |
41 | } | |
42 | ||
fb23d554 SDJ |
43 | /* Implementation of safe_strerror as defined in common-utils.h. */ |
44 | ||
b231e86a | 45 | const char * |
fb23d554 SDJ |
46 | safe_strerror (int errnum) |
47 | { | |
b231e86a CB |
48 | static thread_local char buf[1024]; |
49 | ||
ab7d13f0 CB |
50 | char *res = select_strerror_r (strerror_r (errnum, buf, sizeof (buf)), buf); |
51 | if (res != nullptr) | |
52 | return res; | |
5abebf3c CB |
53 | |
54 | xsnprintf (buf, sizeof buf, "(undocumented errno %d)", errnum); | |
55 | return buf; | |
fb23d554 | 56 | } |