[reactos] 06/08: [NTVDM] Retrieve the full directory of the current running NTVDM instance, to be used as a base path for opening other NTVDM system files.
https://git.reactos.org/?p=reactos.git;a=commitdiff;h=1bd0e3f9f96e255a56e1c1...
commit 1bd0e3f9f96e255a56e1c1d9f5c6e57c22878759 Author: Hermès Bélusca-Maïto hermes.belusca-maito@reactos.org AuthorDate: Sat Nov 27 21:03:55 2021 +0100 Commit: Hermès Bélusca-Maïto hermes.belusca-maito@reactos.org CommitDate: Sun Nov 28 00:26:45 2021 +0100
[NTVDM] Retrieve the full directory of the current running NTVDM instance, to be used as a base path for opening other NTVDM system files. --- subsystems/mvdm/ntvdm/ntvdm.c | 52 +++++++++++++++++++++++++++++++++++++++++-- subsystems/mvdm/ntvdm/ntvdm.h | 10 +++++++++ 2 files changed, 60 insertions(+), 2 deletions(-)
diff --git a/subsystems/mvdm/ntvdm/ntvdm.c b/subsystems/mvdm/ntvdm/ntvdm.c index bedc20ea7ea..5214d81e7c8 100644 --- a/subsystems/mvdm/ntvdm/ntvdm.c +++ b/subsystems/mvdm/ntvdm/ntvdm.c @@ -31,6 +31,10 @@ NTVDM_SETTINGS GlobalSettings; INT NtVdmArgc; WCHAR** NtVdmArgv;
+/* Full directory where NTVDM resides, or the SystemRoot\System32 path */ +WCHAR NtVdmPath[MAX_PATH]; +ULONG NtVdmPathSize; // Length without NULL terminator. + /* PRIVATE FUNCTIONS **********************************************************/
static NTSTATUS @@ -476,6 +480,8 @@ PrintMessageAnsi(IN CHAR_PRINT CharPrint, INT wmain(INT argc, WCHAR *argv[]) { + BOOL Success; + #ifdef STANDALONE
if (argc < 2) @@ -531,20 +537,62 @@ wmain(INT argc, WCHAR *argv[]) "\n\n", GetCommandLineA());
+ /* + * Retrieve the full directory of the current running NTVDM instance. + * In case of failure, use the default SystemRoot\System32 path. + */ + NtVdmPathSize = GetModuleFileNameW(NULL, NtVdmPath, _countof(NtVdmPath)); + NtVdmPath[_countof(NtVdmPath) - 1] = UNICODE_NULL; // Ensure NULL-termination (see WinXP bug) + + Success = ((NtVdmPathSize != 0) && (NtVdmPathSize < _countof(NtVdmPath)) && + (GetLastError() != ERROR_INSUFFICIENT_BUFFER)); + if (Success) + { + /* Find the last path separator, remove it as well as the file name */ + PWCHAR pch = wcsrchr(NtVdmPath, L'\'); + if (pch) + *pch = UNICODE_NULL; + } + else + { + /* We failed, use the default SystemRoot\System32 path */ + NtVdmPathSize = GetSystemDirectoryW(NtVdmPath, _countof(NtVdmPath)); + Success = ((NtVdmPathSize != 0) && (NtVdmPathSize < _countof(NtVdmPath))); + if (!Success) + { + /* We failed again, try to do it ourselves */ + NtVdmPathSize = (ULONG)wcslen(SharedUserData->NtSystemRoot) + _countof("\System32") - 1; + Success = (NtVdmPathSize < _countof(NtVdmPath)); + if (Success) + { + Success = NT_SUCCESS(RtlStringCchPrintfW(NtVdmPath, + _countof(NtVdmPath), + L"%s\System32", + SharedUserData->NtSystemRoot)); + } + if (!Success) + { + wprintf(L"FATAL: Could not retrieve NTVDM path.\n"); + goto Cleanup; + } + } + } + NtVdmPathSize = (ULONG)wcslen(NtVdmPath); + /* Load the global VDM settings */ LoadGlobalSettings(&GlobalSettings);
/* Initialize the console */ if (!ConsoleInit()) { - wprintf(L"FATAL: A problem occurred when trying to initialize the console\n"); + wprintf(L"FATAL: A problem occurred when trying to initialize the console.\n"); goto Cleanup; }
/* Initialize the emulator */ if (!EmulatorInitialize(ConsoleInput, ConsoleOutput)) { - wprintf(L"FATAL: Failed to initialize the emulator\n"); + wprintf(L"FATAL: Failed to initialize the emulator.\n"); goto Cleanup; }
diff --git a/subsystems/mvdm/ntvdm/ntvdm.h b/subsystems/mvdm/ntvdm/ntvdm.h index 2b006c06c39..b3876fb9a98 100644 --- a/subsystems/mvdm/ntvdm/ntvdm.h +++ b/subsystems/mvdm/ntvdm/ntvdm.h @@ -40,6 +40,10 @@ #include <stdarg.h> #include <wchar.h>
+#ifndef _countof +#define _countof(_Array) (sizeof(_Array) / sizeof(_Array[0])) +#endif + /* PSDK/NDK Headers */ #define WIN32_NO_STATUS #include <windef.h> @@ -67,6 +71,8 @@ DWORD WINAPI SetLastConsoleEventActive(VOID); /* PSEH for SEH Support */ #include <pseh/pseh2.h>
+#include <ntstrsafe.h> +
/* VARIABLES ******************************************************************/
@@ -84,6 +90,10 @@ extern NTVDM_SETTINGS GlobalSettings; extern INT NtVdmArgc; extern WCHAR** NtVdmArgv;
+/* Full directory where NTVDM resides, or the SystemRoot\System32 path */ +extern WCHAR NtVdmPath[MAX_PATH]; +extern ULONG NtVdmPathSize; // Length without NULL terminator. + extern HWND hConsoleWnd;
-
Hermès Bélusca-Maïto