Commit | Line | Data |
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cd850b40 | 1 | /* Safe version of strerror for GDB, the GNU debugger. |
fb23d554 | 2 | |
42a4f53d | 3 | Copyright (C) 2006-2019 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" | |
cb511130 | 21 | #include "diagnostics.h" |
5abebf3c | 22 | #include <string.h> |
fb23d554 | 23 | |
ab7d13f0 CB |
24 | /* There are two different versions of strerror_r; one is GNU-specific, the |
25 | other XSI-compliant. They differ in the return type. This overload lets | |
26 | us choose the right behavior for each return type. We cannot rely on Gnulib | |
27 | to solve this for us because IPA does not use Gnulib but uses this | |
28 | function. */ | |
29 | ||
cb511130 CB |
30 | /* We only ever use one of the two overloads, so suppress the warning for |
31 | an unused function. */ | |
32 | DIAGNOSTIC_PUSH | |
33 | DIAGNOSTIC_IGNORE_UNUSED_FUNCTION | |
34 | ||
ab7d13f0 CB |
35 | /* Called if we have a XSI-compliant strerror_r. */ |
36 | static char * | |
37 | select_strerror_r (int res, char *buf) | |
38 | { | |
39 | return res == 0 ? buf : nullptr; | |
40 | } | |
41 | ||
42 | /* Called if we have a GNU strerror_r. */ | |
43 | static char * | |
44 | select_strerror_r (char *res, char *) | |
45 | { | |
46 | return res; | |
47 | } | |
48 | ||
cb511130 CB |
49 | DIAGNOSTIC_POP |
50 | ||
fb23d554 SDJ |
51 | /* Implementation of safe_strerror as defined in common-utils.h. */ |
52 | ||
b231e86a | 53 | const char * |
fb23d554 SDJ |
54 | safe_strerror (int errnum) |
55 | { | |
b231e86a CB |
56 | static thread_local char buf[1024]; |
57 | ||
ab7d13f0 CB |
58 | char *res = select_strerror_r (strerror_r (errnum, buf, sizeof (buf)), buf); |
59 | if (res != nullptr) | |
60 | return res; | |
5abebf3c CB |
61 | |
62 | xsnprintf (buf, sizeof buf, "(undocumented errno %d)", errnum); | |
63 | return buf; | |
fb23d554 | 64 | } |