Hello,
i am trying to write a class, which starts a application and this
application run other applications.
My class has a start and stop-method. The stop method also stop the
child-processes of my started application.
At botton, i added a testclass, which represents my class. I am starting
cmd.exe and this starts a notepad.exe. All is running inside a Thread.
On calling my stop method, i search all childprocesses of my cmd.exe
with help of WMI and terminate these PIDs. The terminate method of
subprocess only terminate the "main"-process. All child-processes will
remain.
All hints to resolve my issue are welcome.
best Regards,
Steffen
#----------------------------------------------------------------------------------------
#----------------------------------------------------------------------------------------
from subprocess import PIPE, Popen
import thread
import time
import logging
import os
import win32api
import pythoncom
import win32con
from wmi import WMI
class MyClass(object):
def __init__(self):
self.name = __name__
self.process = None
self.cmd = None
self.PID = None
self.returncode = None
self.runtime = -1
self.WMI_RUN = False
self.WMI = None
#---------------------------------------------------------------------------
def __startCommand(self):
logging.debug("starting COMMAND")
self.startTime = time.time()
# start-cmd for starting TiscCenter
self.cmd = '"{executable}" -cmd /k
{argument}'.format(executable=os.environ['ComSpec'],argument=r'c:/windows/system32/notepad.exe')
logging.debug("starting command: {0}".format(self.cmd))
self.process = Popen(self.cmd, stdout=PIPE, stderr=PIPE)
self.PID = self.process.pid
self.std_out, self.std_err = self.process.communicate()
self.returncode = self.process.returncode
endTime = time.time()
self.runtime = endTime - self.startTime
#---------------------------------------------------------------------------
#---------------------------------------------------------------------------
def start(self):
try:
thread.start_new_thread(self.__startCommand, ())
except BaseException, err:
print(err)
#---------------------------------------------------------------------------
#---------------------------------------------------------------------------
def stop(self):
if self.process:
self.process.terminate()
else:
logging.error("nothing to stop")
#---------------------------------------------------------------------------
#---------------------------------------------------------------------------
def kill(self):
print("Interface-count:",pythoncom._GetInterfaceCount())
pythoncom.CoInitialize()
try:
ProcessList = []
childList = []
for process in WMI().Win32_Process():
if (process.ParentProcessId == self.PID) and
(process.ProcessId != self.PID):
ProcessList.append(process.ProcessId)
if ProcessList:
for processId in ProcessList:
childList.append(processId)
childList.append(self.PID)
print("PID-List:",childList)
for pid in childList:
try:
handle =
win32api.OpenProcess(win32con.PROCESS_TERMINATE, False, pid)
except BaseException, err:
logging.exception(err)
else:
try:
win32api.TerminateProcess(handle, 0)
win32api.CloseHandle(handle)
except BaseException, err:
logging.exception(err)
except BaseException, err:
logging.exception(err)
finally:
pythoncom.CoUninitialize()
print("Interface-count:",pythoncom._GetInterfaceCount())
#---------------------------------------------------------------------------
if __name__ == '__main__':
logging.basicConfig(
level = logging.DEBUG,
format = "[%(levelname)s] %(asctime)s : %(message)s",
)
a = MyClass()
a.start()
time.sleep(2.0)
a.kill()
#----------------------------------------------------------------------------------------
#----------------------------------------------------------------------------------------
example output:
#----------------------------------------------------------------------------------------
[DEBUG] 2012-01-24 11:38:16,525 : starting COMMAND
[DEBUG] 2012-01-24 11:38:16,529 : starting command:
"C:\Windows\system32\cmd.exe" -cmd /k c:/windows/system32/notepad.exe
('Interface-count:', 4)
('PID-List:', [12892, 13876])
('Interface-count:', 19)
Win32 exception occurred releasing IUnknown at 0x048fd870
Win32 exception occurred releasing IUnknown at 0x048fd808
Win32 exception occurred releasing IUnknown at 0x048f9238
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