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  {
20      char buf[1024];
21      /* Too bad there are three incompatible implementations of the
22       * thread-safe strerror. */
23      const char *s = nullptr;
24  #ifdef WIN32
25      if (strerror_s(buf, sizeof(buf), err) == 0) s = buf;
26  #else
27  #ifdef STRERROR_R_CHAR_P /* GNU variant can return a pointer outside the passed buffer */
28      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  #endif
33      if (s != nullptr) {
34          return strprintf("%s (%d)", s, err);
35      } else {
36          return strprintf("Unknown error (%d)", err);
37      }
38  }
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