Welcome, guest | Sign In | My Account | Store | Cart

win32 service administration (Python recipe) by Lloyd Kvam
ActiveState Code (http://code.activestate.com/recipes/135700/)

Provides some packaging for the win32serviceutil module to simplify starting and stopping services. It also provides a small test example that includes providing arguments for starting a service.

Python, 57 lines
Download
 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
# svcAdmin.py
# in principal this could be expanded to support linux operations
# such as the RedHat style: service <name> status|start|stop|restart
#
import os
import time
from types import *
if os.name == 'nt':
	import win32service
	import win32serviceutil
	RUNNING = win32service.SERVICE_RUNNING
	STARTING = win32service.SERVICE_START_PENDING
	STOPPING = win32service.SERVICE_STOP_PENDING
	STOPPED = win32service.SERVICE_STOPPED
	
	def svcStatus( svc_name, machine=None):
		return win32serviceutil.QueryServiceStatus( svc_name, machine)[1]	# scvType, svcState, svcControls, err, svcErr, svcCP, svcWH

	def svcStop( svc_name, machine=None):
		status = win32serviceutil.StopService( svc_name, machine)[1]
		while status == STOPPING:
			time.sleep(1)
			status = svcStatus( svc_name, machine)
		return status

	def svcStart( svc_name, svc_arg = None, machine=None):
		if not svc_arg is None:
			if type(svc_arg) in StringTypes:
				# win32service expects a list of string arguments
				svc_arg = [ svc_arg]
		win32serviceutil.StartService( svc_name, svc_arg, machine)
		status = svcStatus( svc_name, machine)
		while status == STARTING:
			time.sleep(1)
			status = svcStatus( svc_name, machine)
		return status

if __name__ == "__main__":
	svc = 'mysql'
	#machine = '192.168.0.4'	# no \\ prefix
	machine = None			# localhost
	test_arg = (None, r'--datadir=f:\mysql\data_playpark')
	modulus = len(test_arg)
	argndx = 0
	for i in range(2 * modulus):
		status = svcStatus( svc, machine=machine)
		if status == STOPPED:
			arg = test_arg[argndx % modulus]
			new_status = svcStart( svc, arg, machine=machine)
			argndx += 1
		elif status == RUNNING:
			arg = None
			new_status = svcStop( svc, machine=machine)
		else:
			arg = None
			new_status = "Not changed"
		print "Status changed from %s to %s (with arg: %s)" % (status, new_status, arg)

I discovered that the StartService function required a list for the args parameter. Providing some example code seemed like an easy way to document this. In addition, the svcStart and svcStop functions include a status check loop so that they wait for the service to finish starting or stopping.

Tags: sysadmin