Kill child process

[Pryabu]

Hi all, How to close the child process when parent process crashes? thanks,

[Naveen]

You can add a crash handler in the parent process and in that function you can notify the child process to exit. to install a crash handler check the API's AddVectoredExceptionHandler or SetUnhandledExceptionFilter

nave [My Articles] [My Blog]

[Eugen Podsypalnikov]

It could be performed in the CATCH_ALL section of the parent process :)

virtual void BeHappy() = 0;

[Stephen Hewitt]

Didn't you already ask[^] this question?

Steve

[Stephen Hewitt]

Here's a demonstration of the technique I described last time you asked this question.

// Parent.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <windows.h>
#include <conio.h>
#include <memory.h>
#include <iostream>
#include <string>
#include <sstream>

using namespace std;

HANDLE GetMyHandle()
{
// Get a pseudohandle to the current process.
HANDLE hPseudo = GetCurrentProcess();

// Create a "real" HANDLE from the pseudohandle and make it inheritable.
HANDLE hMe;
DuplicateHandle(
		hPseudo,		// handle to the source process
		hPseudo,		// handle to duplicate
		hPseudo,		// handle to process to duplicate to
		&hMe,			// pointer to duplicate handle
		SYNCHRONIZE,	// access for duplicate handle
		TRUE,			// handle inheritance flag
		0				// optional actions
		);

return hMe;

}

int main(int argc, char* argv[])
{
cout << "Parent process..." << endl;

HANDLE hMe = GetMyHandle(); // The child will wait on this...

// Build the path to the child.
char me\[MAX\_PATH\];
GetModuleFileName(NULL, me, sizeof(me));
string child = me;
child = child.substr(0, child.find\_last\_of('\\\\'));
child += "\\\\Child.exe";

// Finish off the command line with the out process HANDLE.
ostringstream oss;
oss << "\\"" << child << "\\" " << reinterpret\_cast<void\*>(hMe);
string cmd = oss.str();

// Create a mutable copy of the command line.
char \*pCmd = new char\[cmd.length()+1\];
memcpy(pCmd, cmd.c\_str(), cmd.length()+1);

// Start the child.
PROCESS\_INFORMATION pi;
STARTUPINFO si = {0};
si.cb = sizeof(si);
si.dwFlags = STARTF\_USESHOWWINDOW;
si.wShowWindow = SW\_NORMAL;
CreateProcess(
	NULL,	// LPCTSTR lpApplicationName
	pCmd,	// LPTSTR lpCommandLine
	NULL,	// LPSECURITY\_ATTRIBUTES lpProcessAttributes
	NULL,	// LPSECURITY\_ATTRIBUTES lpThreadAttributes
	TRUE,	// BOOL bInheritHandles
	CREATE\_DEFAULT\_ERROR\_MODE | CREATE\_NEW\_CONSOLE,	// DWORD dwCreationFlags
	NULL,	// LPVOID lpEnvironment
	NULL,	// LPCTSTR lpCurrentDirectory
	&si,	// LPSTARTUPINFO lpStartupInfo
	&pi		// LPPROCESS\_INFORMATION lpProcessInformation
	);
// Close the HANDLEs created by CreateProcess which we don't use.
CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);

// Clean up.
CloseHandle(hMe);
delete \[\] pCmd;

cout << "Press any key to crash parent..." << endl;
\_getch();
\*(char\*)0 = 0;

return 0;

}<