python的ctypes c_char是否适用于Windows 64？

Question

我正在尝试加载进程列表，它在 32 位 python 上正常运行。但是，在 64 位上，我无法列出要列出的进程名称。代码如下。如果我将 szExeFile 的结构从 c_char 更改为 c_int 或 long，进程列表会枚举，但我无法查看哪个 pid 属于哪个 exe。我怎样才能让它在 x64 上运行？

from ctypes import *
from ctypes.wintypes import *
import sys


# const variable
# Establish rights and basic options needed for all process declartion / iteration
TH32CS_SNAPPROCESS = 2
STANDARD_RIGHTS_REQUIRED = 0x000F0000
SYNCHRONIZE = 0x00100000
PROCESS_ALL_ACCESS = (STANDARD_RIGHTS_REQUIRED | SYNCHRONIZE | 0xFFF)
TH32CS_SNAPMODULE = 0x00000008
TH32CS_SNAPTHREAD = 0x00000004

##  Create object definitions to story information in
class PROCESSENTRY32(Structure):
    _fields_ = [ ( 'dwSize' , c_uint ) , 
                 ( 'cntUsage' , c_uint) ,
                 ( 'th32ProcessID' , c_uint) ,
                 ( 'th32DefaultHeapID' , c_uint) ,
                 ( 'th32ModuleID' , c_uint) ,
                 ( 'cntThreads' , c_uint) ,
                 ( 'th32ParentProcessID' , c_uint) ,
                 ( 'pcPriClassBase' , c_long) ,
                 ( 'dwFlags' , c_uint) ,
                 ( 'szExeFile' , c_char * 260 ) ]

CreateToolhelp32Snapshot= windll.kernel32.CreateToolhelp32Snapshot
Process32First = windll.kernel32.Process32First
Process32Next = windll.kernel32.Process32Next
GetLastError = windll.kernel32.GetLastError
OpenProcess = windll.kernel32.OpenProcess
GetPriorityClass = windll.kernel32.GetPriorityClass
CloseHandle = windll.kernel32.CloseHandle

try:
    hProcessSnap = c_void_p(0)
    hProcessSnap = CreateToolhelp32Snapshot( TH32CS_SNAPPROCESS , 0 )
    pe32 = PROCESSENTRY32()
    pe32.dwSize = sizeof( PROCESSENTRY32 )
    ret = Process32First( hProcessSnap , pointer( pe32 ) )
    global PROGPid
    PROGPid=False
    while ret:
        print pe32.dwSize,pe32.cntUsage,pe32.th32ProcessID,pe32.th32DefaultHeapID,pe32.th32ModuleID,pe32.cntThreads,pe32.th32ParentProcessID,pe32.pcPriClassBase,pe32.dwFlags,pe32.szExeFile
        hProcess = OpenProcess( PROCESS_ALL_ACCESS , 0 , pe32.th32ProcessID )
        dwPriorityClass = GetPriorityClass( hProcess )
        if dwPriorityClass == 0 :
            CloseHandle( hProcess )
        PROGPid=pe32.th32ProcessID
        ret = Process32Next( hProcessSnap, pointer(pe32) )
        print PROGPid
    CloseHandle ( hProcessSnap )

except:
    print "Error in ListProcessPid"

Answer 1

您的PROCESSENTRY32 structure 错误。这对我有用：

class PROCESSENTRY32(Structure):
    _fields_ = [ ( 'dwSize' , DWORD ) ,
                 ( 'cntUsage' , DWORD) ,
                 ( 'th32ProcessID' , DWORD) ,
                 ( 'th32DefaultHeapID' , POINTER(ULONG)) ,
                 ( 'th32ModuleID' , DWORD) ,
                 ( 'cntThreads' , DWORD) ,
                 ( 'th32ParentProcessID' , DWORD) ,
                 ( 'pcPriClassBase' , LONG) ,
                 ( 'dwFlags' , DWORD) ,
                 ( 'szExeFile' , c_char * 260 ) ]