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-rw-r--r--Source/kwsys/ProcessFwd9x.c211
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diff --git a/Source/kwsys/ProcessFwd9x.c b/Source/kwsys/ProcessFwd9x.c
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index 536c54b..0000000
--- a/Source/kwsys/ProcessFwd9x.c
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-/*============================================================================
- KWSys - Kitware System Library
- Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
-
- Distributed under the OSI-approved BSD License (the "License");
- see accompanying file Copyright.txt for details.
-
- This software is distributed WITHOUT ANY WARRANTY; without even the
- implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- See the License for more information.
-============================================================================*/
-
-/*
- On Windows9x platforms, this executable is spawned between a parent
- process and the child it is invoking to work around a bug. See the
- Win32 implementation file for details.
-
- Future Work: This executable must be linked statically against the C
- runtime library before being encoded into the library. Building it
- in this way may be hard because CMake has limited abilities to build
- different targets with different configurations in the same
- directory. We may just have to create and encode the executable
- once instead of generating it during the build. This would be an
- acceptable solution because the forwarding executable should not
- change very often and is pretty simple.
-*/
-
-#ifdef _MSC_VER
-#pragma warning (push, 1)
-#endif
-#include <windows.h>
-#include <stdio.h>
-
-void ReportLastError(HANDLE errorPipe);
-
-int main()
-{
- /* Process startup information for the real child. */
- STARTUPINFO si;
- PROCESS_INFORMATION pi;
-
- /* The result of waiting for the child to exit. */
- DWORD waitResult;
-
- /* The child's process return code. */
- DWORD retVal;
-
- /* The command line used to invoke this process. */
- LPSTR commandLine = GetCommandLine();
-
- /* Pointer that will be advanced to the beginning of the command
- line of the real child process. */
- LPSTR cmdLine = commandLine;
-
- /* Handle to the error reporting pipe provided by the parent. This
- is parsed off the command line. */
- HANDLE errorPipe = 0;
- HANDLE errorPipeOrig = 0;
-
- /* Handle to the event the parent uses to tell us to resume the child.
- This is parsed off the command line. */
- HANDLE resumeEvent = 0;
-
- /* Handle to the event the parent uses to tell us to kill the child.
- This is parsed off the command line. */
- HANDLE killEvent = 0;
-
- /* Flag for whether to hide window of child process. */
- int hideWindow = 0;
-
- /* An array of the handles on which we wait when the child is
- running. */
- HANDLE waitHandles[2] = {0, 0};
-
- /* Move the pointer past the name of this executable. */
- if(*cmdLine == '"')
- {
- ++cmdLine;
- while(*cmdLine && *cmdLine != '"') { ++cmdLine; }
- if(*cmdLine) { ++cmdLine; }
- }
- else
- {
- while(*cmdLine && *cmdLine != ' ') { ++cmdLine; }
- }
-
- /* Parse the error pipe handle. */
- while(*cmdLine && *cmdLine == ' ') { ++cmdLine; }
- sscanf(cmdLine, "%p", &errorPipeOrig);
-
- /* Parse the resume event handle. */
- while(*cmdLine && *cmdLine != ' ') { ++cmdLine; }
- while(*cmdLine && *cmdLine == ' ') { ++cmdLine; }
- sscanf(cmdLine, "%p", &resumeEvent);
-
- /* Parse the kill event handle. */
- while(*cmdLine && *cmdLine != ' ') { ++cmdLine; }
- while(*cmdLine && *cmdLine == ' ') { ++cmdLine; }
- sscanf(cmdLine, "%p", &killEvent);
-
- /* Parse the hide window flag. */
- while(*cmdLine && *cmdLine != ' ') { ++cmdLine; }
- while(*cmdLine && *cmdLine == ' ') { ++cmdLine; }
- sscanf(cmdLine, "%d", &hideWindow);
-
- /* Skip to the beginning of the command line of the real child. */
- while(*cmdLine && *cmdLine != ' ') { ++cmdLine; }
- while(*cmdLine && *cmdLine == ' ') { ++cmdLine; }
-
- /* Create a non-inherited copy of the error pipe. We do not want
- the child to get it. */
- if(DuplicateHandle(GetCurrentProcess(), errorPipeOrig,
- GetCurrentProcess(), &errorPipe,
- 0, FALSE, DUPLICATE_SAME_ACCESS))
- {
- /* Have a non-inherited duplicate. Close the inherited one. */
- CloseHandle(errorPipeOrig);
- }
- else
- {
- /* Could not duplicate handle. Report the error. */
- ReportLastError(errorPipeOrig);
- return 1;
- }
-
- /* Create the subprocess. */
- ZeroMemory(&si, sizeof(si));
- ZeroMemory(&pi, sizeof(pi));
- si.cb = sizeof(si);
- si.dwFlags = STARTF_USESTDHANDLES|STARTF_USESHOWWINDOW;
- si.wShowWindow = hideWindow?SW_HIDE:SW_SHOWDEFAULT;
- si.hStdInput = GetStdHandle(STD_INPUT_HANDLE);
- si.hStdOutput = GetStdHandle(STD_OUTPUT_HANDLE);
- si.hStdError = GetStdHandle(STD_ERROR_HANDLE);
- if(CreateProcess(0, cmdLine, 0, 0, TRUE, CREATE_SUSPENDED, 0, 0, &si, &pi))
- {
- /* Process created successfully. Close the error reporting pipe
- to notify the parent of success. */
- CloseHandle(errorPipe);
- }
- else
- {
- /* Error creating the process. Report the error to the parent
- process through the special error reporting pipe. */
- ReportLastError(errorPipe);
- return 1;
- }
-
- /* Wait for resume or kill event from parent. */
- waitHandles[0] = killEvent;
- waitHandles[1] = resumeEvent;
- waitResult = WaitForMultipleObjects(2, waitHandles, 0, INFINITE);
-
- /* Check what happened. */
- if(waitResult == WAIT_OBJECT_0)
- {
- /* We were asked to kill the child. */
- TerminateProcess(pi.hProcess, 255);
- WaitForSingleObject(pi.hProcess, INFINITE);
- CloseHandle(pi.hProcess);
- CloseHandle(pi.hThread);
- return 1;
- }
- else
- {
- /* We were asked to resume the child. */
- ResumeThread(pi.hThread);
- CloseHandle(pi.hThread);
- }
-
- /* Wait for subprocess to exit or for kill event from parent. */
- waitHandles[0] = killEvent;
- waitHandles[1] = pi.hProcess;
- waitResult = WaitForMultipleObjects(2, waitHandles, 0, INFINITE);
-
- /* Check what happened. */
- if(waitResult == WAIT_OBJECT_0)
- {
- /* We were asked to kill the child. */
- TerminateProcess(pi.hProcess, 255);
- WaitForSingleObject(pi.hProcess, INFINITE);
- CloseHandle(pi.hProcess);
- return 1;
- }
- else
- {
- /* The child exited. Get the return code. */
- GetExitCodeProcess(pi.hProcess, &retVal);
- CloseHandle(pi.hProcess);
- return retVal;
- }
-}
-
-void ReportLastError(HANDLE errorPipe)
-{
- LPVOID lpMsgBuf;
- DWORD n;
- FormatMessage(
- FORMAT_MESSAGE_ALLOCATE_BUFFER |
- FORMAT_MESSAGE_FROM_SYSTEM |
- FORMAT_MESSAGE_IGNORE_INSERTS,
- NULL,
- GetLastError(),
- MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
- (LPTSTR) &lpMsgBuf,
- 0,
- NULL
- );
- WriteFile(errorPipe, lpMsgBuf, strlen(lpMsgBuf)+1, &n, 0);
- LocalFree( lpMsgBuf );
-}