Author: hbelusca
Date: Wed Dec 18 01:16:54 2013
New Revision: 61290
URL: http://svn.reactos.org/svn/reactos?rev=61290&view=rev
Log:
[NTVDM]
Hackplement BOP_CMD function 0x08: "Launch external command". Still WIP.
Explanation: Launching a command from command.com starts (under certain conditions not implemented there) "cmd.exe /c <the_command>"
See https://groups.google.com/forum/#!topic/microsoft.public.win2000.cmdprompt.…
and http://technet.microsoft.com/en-us/library/cc723564.aspx#XSLTsection1231211…
subsection "CMD.EXE and COMMAND.COM":
"Be aware that a command shell is not an MS-DOS command prompt, even though it shares the same icon.
The Windows NT command shell is a full 32-bit Windows NT console application that resides in the CMD.EXE executable file.
The MS-DOS command prompt is a 16-bit DOS application that resides in the COMMAND.COM executable file.
Because COMMAND.COM is a 16-bit DOS executable, Windows NT executes this shell within a Windows NT virtual DOS machine (VDM).
COMMAND.COM is supplied primarily for compatibility with MS-DOS.
[...]
This behavior reveals a quite subtle feature of Windows NT that is very important. The 16-bit MS-DOS shell (COMMAND.COM)
that ships with Windows NT is specially designed for Windows NT. When a command is entered for execution by this shell,
it does not actually execute it. Instead, it packages the command text and sends it to a 32-bit CMD.EXE command shell for
execution. Because all commands are actually executed by CMD.EXE (the Windows NT command shell), the 16-bit shell inherits
all the features and facilities of the full Windows NT shell."
Modified:
branches/ntvdm/subsystems/ntvdm/dos.c
Modified: branches/ntvdm/subsystems/ntvdm/dos.c
URL: http://svn.reactos.org/svn/reactos/branches/ntvdm/subsystems/ntvdm/dos.c?re…
==============================================================================
--- branches/ntvdm/subsystems/ntvdm/dos.c [iso-8859-1] (original)
+++ branches/ntvdm/subsystems/ntvdm/dos.c [iso-8859-1] Wed Dec 18 01:16:54 2013
@@ -1422,7 +1422,77 @@
BYTE FuncNum = *(PBYTE)SEG_OFF_TO_PTR(getCS(), getIP());
setIP(getIP() + 1);
- DPRINT1("Unknown DOS CMD Interpreter BOP Function: 0x%02X\n", FuncNum);
+ switch (FuncNum)
+ {
+ case 0x08: // Launch external command
+ {
+#define CMDLINE_LENGTH 1024
+
+ BOOL Result;
+ DWORD dwExitCode;
+
+ LPSTR Command = (LPSTR)SEG_OFF_TO_PTR(getDS(), getSI());
+ CHAR CommandLine[CMDLINE_LENGTH] = "";
+ STARTUPINFOA StartupInfo;
+ PROCESS_INFORMATION ProcessInformation;
+ DPRINT1("CMD Run Command '%s'\n", Command);
+
+ Command[strlen(Command)-1] = 0;
+
+ strcpy(CommandLine, "cmd.exe /c ");
+ strcat(CommandLine, Command);
+
+ ZeroMemory(&StartupInfo, sizeof(StartupInfo));
+ ZeroMemory(&ProcessInformation, sizeof(ProcessInformation));
+
+ StartupInfo.cb = sizeof(StartupInfo);
+
+ DosPrintCharacter('\n');
+
+ Result = CreateProcessA(NULL,
+ CommandLine,
+ NULL,
+ NULL,
+ TRUE,
+ 0,
+ NULL,
+ NULL,
+ &StartupInfo,
+ &ProcessInformation);
+ if (Result)
+ {
+ DPRINT1("Command '%s' launched successfully\n");
+
+ /* Wait for process termination */
+ WaitForSingleObject(ProcessInformation.hProcess, INFINITE);
+
+ /* Get the exit code */
+ GetExitCodeProcess(ProcessInformation.hProcess, &dwExitCode);
+
+ /* Close handles */
+ CloseHandle(ProcessInformation.hThread);
+ CloseHandle(ProcessInformation.hProcess);
+ }
+ else
+ {
+ DPRINT1("Failed when launched command '%s'\n");
+ dwExitCode = GetLastError();
+ }
+
+ DosPrintCharacter('\n');
+
+ setAL((UCHAR)dwExitCode);
+
+ break;
+ }
+
+ default:
+ {
+ DPRINT1("Unknown DOS CMD Interpreter BOP Function: 0x%02X\n", FuncNum);
+ // setCF(1); // Disable, otherwise we enter an infinite loop
+ break;
+ }
+ }
}
VOID WINAPI DosInt20h(LPWORD Stack)