/tmp/bitcoin/src/util/syserror.cpp
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1 | | // Copyright (c) 2020-present The Bitcoin Core developers |
2 | | // Distributed under the MIT software license, see the accompanying |
3 | | // file COPYING or http://www.opensource.org/licenses/mit-license.php. |
4 | | |
5 | | #include <bitcoin-build-config.h> // IWYU pragma: keep |
6 | | |
7 | | #include <util/syserror.h> |
8 | | |
9 | | #include <tinyformat.h> |
10 | | |
11 | | #include <cstring> |
12 | | #include <string> |
13 | | |
14 | | #if defined(WIN32) |
15 | | #include <windows.h> |
16 | | #endif |
17 | | |
18 | | std::string SysErrorString(int err) |
19 | 42 | { |
20 | 42 | char buf[1024]; |
21 | | /* Too bad there are three incompatible implementations of the |
22 | | * thread-safe strerror. */ |
23 | 42 | const char *s = nullptr; |
24 | | #ifdef WIN32 |
25 | | if (strerror_s(buf, sizeof(buf), err) == 0) s = buf; |
26 | | #else |
27 | 42 | #ifdef STRERROR_R_CHAR_P /* GNU variant can return a pointer outside the passed buffer */ |
28 | 42 | s = strerror_r(err, buf, sizeof(buf)); |
29 | | #else /* POSIX variant always returns message in buffer */ |
30 | | if (strerror_r(err, buf, sizeof(buf)) == 0) s = buf; |
31 | | #endif |
32 | 42 | #endif |
33 | 42 | if (s != nullptr) { |
34 | 42 | return strprintf("%s (%d)", s, err); |
35 | 42 | } else { |
36 | 0 | return strprintf("Unknown error (%d)", err); |
37 | 0 | } |
38 | 42 | } |
39 | | |
40 | | #if defined(WIN32) |
41 | | std::string Win32ErrorString(int err) |
42 | | { |
43 | | char buf[256]; |
44 | | buf[0] = 0; |
45 | | if (FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS | FORMAT_MESSAGE_MAX_WIDTH_MASK, |
46 | | nullptr, err, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), |
47 | | buf, ARRAYSIZE(buf), nullptr)) { |
48 | | return strprintf("%s (%d)", buf, err); |
49 | | } else { |
50 | | return strprintf("Unknown error (%d)", err); |
51 | | } |
52 | | } |
53 | | #endif |