Terminal Server Problem
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Hi everybody I am creating an application using VC++ that runs on a terminal server with 30 end users. The end users will use thin clients as front end machines. The application consists of a main menu executeble that opens other executables depending on the user selection. In order to establish that communication I use named pipes. Actually I use 1 named pipe as the main tube for data transfer. What happens is that sometimes the session of any user may freeze and another user may view his data. As a result I have started suspecting that something is wrong with the method that creates the child process and also that at a certain point one user may "use" the name pipe share of the other. The code that performs the above call is: int CTransfer::StartTalking(CString szNewProcess, CNamedPipe* m_ServerObject, char *pszBuffer) { STARTUPINFO si; PROCESS_INFORMATION pi; char szProcess[128]; strcpy(szProcess , (LPCTSTR)szNewProcess); ZeroMemory( &si, sizeof(si) ); si.cb = sizeof(si); ZeroMemory( &pi, sizeof(pi) ); szNewProcess += ".exe"; // Start the child process. if( !CreateProcess( NULL, // No module name (use command line). szProcess, // Command line. NULL, // Process handle not inheritable. NULL, // Thread handle not inheritable. TRUE, // Set handle inheritance to FALSE. 0, // No creation flags. NULL, // Use parent's environment block. NULL, // Use parent's starting directory. &si, // Pointer to STARTUPINFO structure. &pi ) // Pointer to PROCESS_INFORMATION structure. ) { return 1; } #ifndef _DEBUG if (strlen(pszBuffer)) { DWORD dwBytesWritten; if (m_ServerObject->ConnectClient()) m_ServerObject->Write(pszBuffer , strlen(pszBuffer), dwBytesWritten); } #endif // Wait until child process exits. WaitForSingleObject( pi.hProcess, INFINITE ); // Close process and thread handles. CloseHandle( pi.hProcess ); CloseHandle( pi.hThread ); return 0; } I am thinking that I could do certain things such as: 1. create 1 named pipe per module in order to distribute traffic to more named pipes. 2. use a CreateMutex before the CreateProcess and Release it before the WaitforSingleObject I will definitely appreciate any opion or help that you might provide. Thank you for your time Spiros Prant