Article Technique

Création standard de processus

La création d'un processus se fait par un appel à l'API Win32 CreateProcess. Cette fonction requiert plusieurs paramètres.

BOOL CreateProcess(
  LPCTSTR lpApplicationName,                 // name of executable module
  LPTSTR lpCommandLine,                      // command line string
  LPSECURITY_ATTRIBUTES lpProcessAttributes, // SD
  LPSECURITY_ATTRIBUTES lpThreadAttributes,  // SD
  BOOL bInheritHandles,                      // handle inheritance option
  DWORD dwCreationFlags,                     // creation flags
  LPVOID lpEnvironment,                      // new environment block
  LPCTSTR lpCurrentDirectory,                // current directory name
  LPSTARTUPINFO lpStartupInfo,               // startup information
  LPPROCESS_INFORMATION lpProcessInformation // process information
);

Le paramètre qui nous intéresse est lpCommandLine et il va contenir le nom de l'application à lancer.

#include "stdafx.h"
#include "windows.h"

BOOL CmdRun(LPSTR lpszCmd);

int main(int argc, char* argv[])
{
	if( argc != 2 )
	{
		printf("CreateP3 cmd\n");
		return 0;
	}

	CmdRun(argv[1]);
	return 0;
}

BOOL CmdRun(LPSTR lpszCmd)
{
	PROCESS_INFORMATION pi;
	STARTUPINFO si;
	BOOL bCreated = FALSE;

	memset(&pi, 0, sizeof(PROCESS_INFORMATION));
	memset(&si, 0, sizeof(STARTUPINFO));
	
	bCreated = CreateProcess(NULL, lpszCmd, NULL, NULL, TRUE, 0, NULL, NULL, &si, π);
	if( bCreated==FALSE )
	{
		printf("CreateProcess failed\n");
		return FALSE;
	}

	WaitForSingleObject(pi.hProcess, INFINITE);
	
	CloseHandle(pi.hProcess);
	CloseHandle(pi.hThread);  

	return TRUE;
}