[問題] CreatePipe & 程式間傳送訊息的問題

看板C_and_CPP (C/C++)作者CMJ0121 (請多指教!!)時間16年前 (2009/10/17 20:54)推噓2(2推 0噓 7→)

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Q: 我想自己寫一個程式 A, 用 CreateProcess 開啟 telnet 然後想用 CreatePipe建立管線使得 A <-> telnet 可以溝通目前我已經可以成功建立 telnet CreatePipe也沒有出現 Error 但是我用 WriteFile卻沒辦法跟 telnet溝通 (我用來登入 ptt, 但是沒有出現任何反應) 所以我先建立 cmd.exe來測試然後用 WriteFile出來之後 cmd.exe沒有如我預期般的出現 test字眼... /* ================== 我的原始碼 ======================= */ #include <windows.h> #include <stdio.h> #include <tchar.h> int main( int argc, TCHAR *argv[] ) { int len; HANDLE telnet_input, telnt_output; STARTUPINFO si; PROCESS_INFORMATION pi; SECURITY_ATTRIBUTES sa; ZeroMemory( &si, sizeof(si) ); si.cb = sizeof(si); ZeroMemory( &pi, sizeof(pi) ); if( !CreateProcess( NULL, // No module name (use command line) "cmd.exe", // Command line NULL, // Process handle not inheritable NULL, // Thread handle not inheritable FALSE, // 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 ) { printf( "CreateProcess failed (%d).\n", GetLastError() ); return 1; } sa.nLength = sizeof(SECURITY_ATTRIBUTES); sa.bInheritHandle = TRUE; sa.lpSecurityDescriptor = NULL; if( !CreatePipe( &pi.hProcess, &telnet_input, &sa, 0 ) ) { printf("Create pipe failed (%d).\n", GetLastError() ); return 1; } WriteFile( telnet_input, "test", 4, &len, NULL ); // Wait until child process exits. WaitForSingleObject( pi.hProcess, INFINITE ); // Close process and thread handles. CloseHandle( pi.hProcess ); CloseHandle( pi.hThread ); CloseHandle( telnet_input ); return 0; } -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 59.112.45.253