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List System Process and Process Information on win32 (Python recipe) by winterTTr Dong
ActiveState Code (http://code.activestate.com/recipes/576362/)

use ctypes , load the win32 API to enum process and list the process info

Python, 194 lines
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from ctypes import c_long , c_int , c_uint , c_char , c_ubyte , c_char_p , c_void_p
from ctypes import windll
from ctypes import Structure
from ctypes import sizeof , POINTER , pointer , cast

# const variable
TH32CS_SNAPPROCESS = 2
STANDARD_RIGHTS_REQUIRED = 0x000F0000
SYNCHRONIZE = 0x00100000
PROCESS_ALL_ACCESS = (STANDARD_RIGHTS_REQUIRED | SYNCHRONIZE | 0xFFF)
TH32CS_SNAPMODULE = 0x00000008
TH32CS_SNAPTHREAD = 0x00000004


# struct 
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 ) , 
                 ( 'th32MemoryBase' , c_long) ,
                 ( 'th32AccessKey' , c_long ) ]


class MODULEENTRY32(Structure):
    _fields_ = [ ( 'dwSize' , c_long ) , 
                ( 'th32ModuleID' , c_long ),
                ( 'th32ProcessID' , c_long ),
                ( 'GlblcntUsage' , c_long ),
                ( 'ProccntUsage' , c_long ) ,
                ( 'modBaseAddr' , c_long ) ,
                ( 'modBaseSize' , c_long ) , 
                ( 'hModule' , c_void_p ) ,
                ( 'szModule' , c_char * 256 ),
                ( 'szExePath' , c_char * 260 ) ]

class THREADENTRY32(Structure):
    _fields_ = [
        ('dwSize' , c_long ),
        ('cntUsage' , c_long),
        ('th32ThreadID' , c_long),
        ('th32OwnerProcessID' , c_long),
        ('tpBasePri' , c_long),
        ('tpDeltaPri' , c_long),
        ('dwFlags' , c_long) ]





# forigen function
## CreateToolhelp32Snapshot
CreateToolhelp32Snapshot= windll.kernel32.CreateToolhelp32Snapshot
CreateToolhelp32Snapshot.reltype = c_long
CreateToolhelp32Snapshot.argtypes = [ c_int , c_int ]
## Process32First
Process32First = windll.kernel32.Process32First
Process32First.argtypes = [ c_void_p , POINTER( PROCESSENTRY32 ) ]
Process32First.rettype = c_int
## Process32Next
Process32Next = windll.kernel32.Process32Next
Process32Next.argtypes = [ c_void_p , POINTER(PROCESSENTRY32) ]
Process32Next.rettype = c_int
## OpenProcess
OpenProcess = windll.kernel32.OpenProcess
OpenProcess.argtypes = [ c_void_p , c_int , c_long ]
OpenProcess.rettype = c_long
## GetPriorityClass
GetPriorityClass = windll.kernel32.GetPriorityClass
GetPriorityClass.argtypes = [ c_void_p ]
GetPriorityClass.rettype = c_long
## CloseHandle
CloseHandle = windll.kernel32.CloseHandle
CloseHandle.argtypes = [ c_void_p ]
CloseHandle.rettype = c_int
## Module32First
Module32First = windll.kernel32.Module32First
Module32First.argtypes = [ c_void_p , POINTER(MODULEENTRY32) ]
Module32First.rettype = c_int
## Module32Next
Module32Next = windll.kernel32.Module32Next
Module32Next.argtypes = [ c_void_p , POINTER(MODULEENTRY32) ]
Module32Next.rettype = c_int
## Thread32First
Thread32First = windll.kernel32.Thread32First
Thread32First.argtypes = [ c_void_p , POINTER(THREADENTRY32) ]
Thread32First.rettype = c_int
## Thread32Next
Thread32Next = windll.kernel32.Thread32Next
Thread32Next.argtypes = [ c_void_p , POINTER(THREADENTRY32) ]
Thread32Next.rettype = c_int
## GetLastError
GetLastError = windll.kernel32.GetLastError
GetLastError.rettype = c_long


def ListProcessModules( ProcessID ):
    hModuleSnap = c_void_p(0)
    me32 = MODULEENTRY32()
    me32.dwSize = sizeof( MODULEENTRY32 )
    hModuleSnap = CreateToolhelp32Snapshot( TH32CS_SNAPMODULE, ProcessID )

    ret = Module32First( hModuleSnap, pointer(me32) )
    if ret == 0 :
        print 'ListProcessModules() Error on Module32First[%d]' % GetLastError()
        CloseHandle( hModuleSnap )
        return False 

    while ret :
        print "   MODULE NAME:     %s"%             me32.szModule 
        print "   executable     = %s"%             me32.szExePath 
        print "   process ID     = 0x%08X"%         me32.th32ProcessID 
        print "   ref count (g)  =     0x%04X"%     me32.GlblcntUsage 
        print "   ref count (p)  =     0x%04X"%     me32.ProccntUsage 
        print "   base address   = 0x%08X"%         me32.modBaseAddr 
        print "   base size      = %d"%             me32.modBaseSize 

        ret = Module32Next( hModuleSnap , pointer(me32) )

    CloseHandle( hModuleSnap )
    return True




def ListProcessThreads( ProcessID ):
    hThreadSnap = c_void_p(0)
    te32 = THREADENTRY32 ()
    te32.dwSize = sizeof(THREADENTRY32 )

    hThreadSnap = CreateToolhelp32Snapshot( TH32CS_SNAPTHREAD, 0 )

    ret = Thread32First( hThreadSnap, pointer(te32) )

    if ret == 0 :
        print 'ListProcessThreads() Error on Thread32First[%d]' % GetLastError()
        CloseHandle( hThreadSnap )
        return False

    while ret :
        if te32.th32OwnerProcessID == ProcessID : 
            print "   THREAD ID      = 0x%08X"% te32.th32ThreadID 
            print "   base priority  = %d"% te32.tpBasePri 
            print "   delta priority = %d"% te32.tpDeltaPri 

        ret = Thread32Next( hThreadSnap, pointer(te32) )

    CloseHandle( hThreadSnap )
    return True
    






# main
if __name__ == '__main__' :
    hProcessSnap = c_void_p(0)
    hProcessSnap = CreateToolhelp32Snapshot( TH32CS_SNAPPROCESS , 0 )


    pe32 = PROCESSENTRY32()
    pe32.dwSize = sizeof( PROCESSENTRY32 )
    ret = Process32First( hProcessSnap , pointer( pe32 ) )

    while ret :
        print ""
        print "=================================================="
        print "Process Name : %s " % pe32.szExeFile
        print "--------------------------------------------------"

        hProcess = OpenProcess( PROCESS_ALL_ACCESS , 0 , pe32.th32ProcessID )
        dwPriorityClass = GetPriorityClass( hProcess )
        if dwPriorityClass == 0 :
            CloseHandle( hProcess )


        print "  process ID        = 0x%08X" % pe32.th32ProcessID
        print "  thread count      = %d" % pe32.cntThreads
        print "  parent process ID = 0x%08X" % pe32.th32ParentProcessID
        print "  Priority Base     = %d" % pe32.pcPriClassBase
        print "  Priority Class    = %d" %  dwPriorityClass

        ListProcessModules( pe32.th32ProcessID )
        ListProcessThreads( pe32.th32ProcessID )

        ret = Process32Next( hProcessSnap, pointer(pe32) )
Tags: sysadmin