ctypes 获取所有进程

参考链接：https://stackoverflow.com/questions/67711879/python-3-x-ctypes-windows-api-call-fails-with-error-bad-length-24

import ctypes
from ctypes import wintypes

ULONG_PTR = wintypes.LPARAM  # ULONG_PTR type changes size 32-/64-bit.  LPARAM does too.
MAX_PATH = 260               # Needed for "exe" array to define correctly
TH32CS_SNAPPROCESS = 0x00000002
ERROR_NO_MORE_FILES = 18

class PROCESSENTRY32(ctypes.Structure):
    '''
        DWORD     dwSize;
        DWORD     cntUsage;
        DWORD     th32ProcessID;
        ULONG_PTR th32DefaultHeapID;
        DWORD     th32ModuleID;
        DWORD     cntThreads;
        DWORD     th32ParentProcessID;
        LONG      pcPriClassBase;
        DWORD     dwFlags;
        CHAR      szExeFile[MAX_PATH];
    '''
    _fields_ = [("dwSize", wintypes.DWORD),
                ("cntUsage", wintypes.DWORD),
                ("th32ProcessID", wintypes.DWORD),
                ("th32DefaultHeapID", ULONG_PTR),
                ("th32ModuleID", wintypes.DWORD),
                ("cntThreads", wintypes.DWORD),
                ("th32ParentProcessID", wintypes.DWORD),
                ("pcPriClassBase", wintypes.LONG),
                ("dwFlags", wintypes.DWORD),
                ("szExeFile", wintypes.WCHAR * MAX_PATH)]


def getProcessList():
    # Declaring parameter types and return values helps catch errors.
    # HANDLE is different on 32-/64-bit as well and can get truncated.
    kernel32dll = ctypes.windll.kernel32
    kernel32dll.CreateToolhelp32Snapshot.argtypes = wintypes.DWORD, wintypes.DWORD
    kernel32dll.CreateToolhelp32Snapshot.restype = wintypes.HANDLE
    kernel32dll.Process32FirstW.argtypes = wintypes.HANDLE, ctypes.POINTER(PROCESSENTRY32)
    kernel32dll.Process32FirstW.restype = wintypes.BOOL
    kernel32dll.Process32NextW.argtypes = wintypes.HANDLE, ctypes.POINTER(PROCESSENTRY32)
    kernel32dll.Process32NextW.restype = wintypes.BOOL

    CreateToolhelp32Snapshot = kernel32dll.CreateToolhelp32Snapshot
    Process32First = kernel32dll.Process32First
    Process32Next = kernel32dll.Process32Next
    Process32FirstW = kernel32dll.Process32FirstW
    Process32NextW = kernel32dll.Process32NextW
    CloseHandle = kernel32dll.CloseHandle

    hProcessSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0)

    pe32 = PROCESSENTRY32()
    pe32.dwSize = ctypes.sizeof(PROCESSENTRY32)
    flag = Process32FirstW(hProcessSnap, pe32)
    while flag:
        print(pe32.szExeFile)
        if Process32NextW(hProcessSnap, pe32) == False:
            break
    CloseHandle(hProcessSnap)


if __name__ == '__main__':
    getProcessList()