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Search process by name ctypes windows - WAAAAY FASTER THAN psutil psutil.process_iter()
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| import ctypes | |
| import ctypes.wintypes | |
| # Load the required libraries | |
| psapi = ctypes.WinDLL('Psapi.dll') | |
| kernel32 = ctypes.WinDLL('kernel32.dll') | |
| # Define constants | |
| PROCESS_QUERY_INFORMATION = 0x0400 | |
| PROCESS_VM_READ = 0x0010 | |
| MAX_PATH = 260 | |
| def get_pids_by_name_fast(process_name): | |
| process_name = process_name.encode('utf-8') | |
| pids = [] | |
| # Allocate an array for the process IDs | |
| array_size = 1024 | |
| pid_array = (ctypes.wintypes.DWORD * array_size)() | |
| bytes_returned = ctypes.wintypes.DWORD() | |
| # Call EnumProcesses to get the list of process IDs | |
| if not psapi.EnumProcesses(ctypes.byref(pid_array), ctypes.sizeof(pid_array), ctypes.byref(bytes_returned)): | |
| raise ctypes.WinError(ctypes.get_last_error()) | |
| # Calculate the number of processes | |
| num_pids = bytes_returned.value // ctypes.sizeof(ctypes.wintypes.DWORD) | |
| # Iterate over all the process IDs | |
| for pid in pid_array[:num_pids]: | |
| # Open the process with necessary privileges | |
| h_process = kernel32.OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, False, pid) | |
| if h_process: | |
| exe_name = (ctypes.c_char * MAX_PATH)() | |
| h_module = ctypes.wintypes.HMODULE() | |
| needed = ctypes.wintypes.DWORD() | |
| # Get the first module, which is the executable | |
| if psapi.EnumProcessModules(h_process, ctypes.byref(h_module), ctypes.sizeof(h_module), ctypes.byref(needed)): | |
| psapi.GetModuleBaseNameA(h_process, h_module, ctypes.byref(exe_name), ctypes.sizeof(exe_name)) | |
| if exe_name.value.lower() == process_name.lower(): | |
| pids.append(pid) | |
| kernel32.CloseHandle(h_process) | |
| return pids | |
| # Example usage: | |
| process_name = "python.exe" | |
| matching_pids = get_pids_by_name_fast(process_name) | |
| print(f"PIDs for processes named '{process_name}': {matching_pids}") |
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