+#if defined(_WIN32) && !defined(__CYGWIN__)
+# include <tchar.h>
+# include <signal.h>
+# ifdef __WATCOMC__
+# if defined(_UNICODE) || defined(__UNICODE__)
+# define _vsntprintf _vsnwprintf
+# else
+# define _vsntprintf _vsnprintf
+# endif
+# endif
+# ifdef _MSC_VER
+# define alloca _alloca
+# endif
+
+# if defined(_WIN32_WINNT) && _WIN32_WINNT>=0x0333
+int OPENSSL_isservice(void)
+{
+ HWINSTA h;
+ DWORD len;
+ WCHAR *name;
+ static union {
+ void *p;
+ int (*f) (void);
+ } _OPENSSL_isservice = {
+ NULL
+ };
+
+ if (_OPENSSL_isservice.p == NULL) {
+ HANDLE h = GetModuleHandle(NULL);
+ if (h != NULL)
+ _OPENSSL_isservice.p = GetProcAddress(h, "_OPENSSL_isservice");
+ if (_OPENSSL_isservice.p == NULL)
+ _OPENSSL_isservice.p = (void *)-1;
+ }
+
+ if (_OPENSSL_isservice.p != (void *)-1)
+ return (*_OPENSSL_isservice.f) ();
+
+ (void)GetDesktopWindow(); /* return value is ignored */
+
+ h = GetProcessWindowStation();
+ if (h == NULL)
+ return -1;
+
+ if (GetUserObjectInformationW(h, UOI_NAME, NULL, 0, &len) ||
+ GetLastError() != ERROR_INSUFFICIENT_BUFFER)
+ return -1;
+
+ if (len > 512)
+ return -1; /* paranoia */
+ len++, len &= ~1; /* paranoia */
+ name = (WCHAR *)alloca(len + sizeof(WCHAR));
+ if (!GetUserObjectInformationW(h, UOI_NAME, name, len, &len))
+ return -1;
+
+ len++, len &= ~1; /* paranoia */
+ name[len / sizeof(WCHAR)] = L'\0'; /* paranoia */
+# if 1
+ /*
+ * This doesn't cover "interactive" services [working with real
+ * WinSta0's] nor programs started non-interactively by Task Scheduler
+ * [those are working with SAWinSta].
+ */
+ if (wcsstr(name, L"Service-0x"))
+ return 1;
+# else
+ /* This covers all non-interactive programs such as services. */
+ if (!wcsstr(name, L"WinSta0"))
+ return 1;
+# endif
+ else
+ return 0;
+}
+# else
+int OPENSSL_isservice(void)
+{
+ return 0;
+}
+# endif
+
+void OPENSSL_showfatal(const char *fmta, ...)
+{
+ va_list ap;
+ TCHAR buf[256];
+ const TCHAR *fmt;
+# ifdef STD_ERROR_HANDLE /* what a dirty trick! */
+ HANDLE h;
+
+ if ((h = GetStdHandle(STD_ERROR_HANDLE)) != NULL &&
+ GetFileType(h) != FILE_TYPE_UNKNOWN) {
+ /* must be console application */
+ va_start(ap, fmta);
+ vfprintf(stderr, fmta, ap);
+ va_end(ap);
+ return;
+ }
+# endif
+
+ if (sizeof(TCHAR) == sizeof(char))
+ fmt = (const TCHAR *)fmta;
+ else
+ do {
+ int keepgoing;
+ size_t len_0 = strlen(fmta) + 1, i;
+ WCHAR *fmtw;
+
+ fmtw = (WCHAR *)alloca(len_0 * sizeof(WCHAR));
+ if (fmtw == NULL) {
+ fmt = (const TCHAR *)L"no stack?";
+ break;
+ }
+# ifndef OPENSSL_NO_MULTIBYTE
+ if (!MultiByteToWideChar(CP_ACP, 0, fmta, len_0, fmtw, len_0))
+# endif
+ for (i = 0; i < len_0; i++)
+ fmtw[i] = (WCHAR)fmta[i];
+
+ for (i = 0; i < len_0; i++) {
+ if (fmtw[i] == L'%')
+ do {
+ keepgoing = 0;
+ switch (fmtw[i + 1]) {
+ case L'0':
+ case L'1':
+ case L'2':
+ case L'3':
+ case L'4':
+ case L'5':
+ case L'6':
+ case L'7':
+ case L'8':
+ case L'9':
+ case L'.':
+ case L'*':
+ case L'-':
+ i++;
+ keepgoing = 1;
+ break;
+ case L's':
+ fmtw[i + 1] = L'S';
+ break;
+ case L'S':
+ fmtw[i + 1] = L's';
+ break;
+ case L'c':
+ fmtw[i + 1] = L'C';
+ break;
+ case L'C':
+ fmtw[i + 1] = L'c';
+ break;
+ }
+ } while (keepgoing);
+ }
+ fmt = (const TCHAR *)fmtw;
+ } while (0);
+
+ va_start(ap, fmta);
+ _vsntprintf(buf, sizeof(buf) / sizeof(TCHAR) - 1, fmt, ap);
+ buf[sizeof(buf) / sizeof(TCHAR) - 1] = _T('\0');
+ va_end(ap);
+
+# if defined(_WIN32_WINNT) && _WIN32_WINNT>=0x0333
+ /* this -------------v--- guards NT-specific calls */
+ if (check_winnt() && OPENSSL_isservice() > 0) {
+ HANDLE h = RegisterEventSource(0, _T("OPENSSL"));
+ const TCHAR *pmsg = buf;
+ ReportEvent(h, EVENTLOG_ERROR_TYPE, 0, 0, 0, 1, 0, &pmsg, 0);
+ DeregisterEventSource(h);
+ } else
+# endif
+ MessageBox(NULL, buf, _T("OpenSSL: FATAL"), MB_OK | MB_ICONSTOP);
+}
+#else
+void OPENSSL_showfatal(const char *fmta, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmta);
+ vfprintf(stderr, fmta, ap);
+ va_end(ap);
+}
+
+int OPENSSL_isservice(void)
+{
+ return 0;
+}