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Is a win32 process running using the pid.

P: n/a
Guy
Hi, I created a function, which seems to work, quite well, it tells me
if a process is running in widows using the pid number (I'm aware that
the pid number in widows is not called a pid and this is really a unix
thing but what the hell). The function keeps crashing (I've included
the crash but I don't think it will do any good.), only sometimes,
most of the time it works fine and I don't know why, Could any body
suggest anything, maybe someone has a stable function that can do the
below :

CRASH
======

Traceback (most recent call last):
File "E:\MW\MAINLINE\Makefile\Build\PCBuild.py", line 607, in ?
PCBuild_Support.MakefileBuild(Makefile_Modules_lst ,Flavour_lst,BuildSetUp,Enviroment)
File "E:\MW\MAINLINE\Makefile\Build\PCBuild_Support.py" , line 100,
in MakefileBuild
CreateBuildLogs(ModulesBeingBuilt_lst)
File "E:\MW\MAINLINE\Makefile\Build\PCBuild_Support.py" , line 252,
in CreateBuildLogs
if(process.IsProcessRunning(Build[4]._processId)==N):
# Checks to see is process has ended. (The processID is the
pid number
and is obtained from the process class.(Your Flavorite Simon.))
File "E:\MW\MAINLINE\Makefile\Build\process.py", line 2450, in
IsProcessRunning
hcs.append(win32pdh.AddCounter(hq, path))
pywintypes.error: (-1, 'AddCounter', 'No error message is available')

FUNCTION
=========

# IsProcessRunning - Supply the process Id number and this function
will tell you if the process is running or not by returning Y and N.
def IsProcessRunning(pid):
if sys.platform.startswith("win"):
object = "Process"
win32pdh.EnumObjects(None, None, 0, 1)
items, instances = win32pdh.EnumObjectItems(None,None,object,
win32pdh.PERF_DETAIL_WIZARD)
# Need to track multiple instances of the same name.
instance_dict = {}
for instance in instances:
try:
instance_dict[instance] = instance_dict[instance] + 1
except KeyError:
instance_dict[instance] = 0
# Bit of a hack to get useful info.
items = ["ID Process"] + items[:5]
for instance, max_instances in instance_dict.items():
for inum in xrange(max_instances+1):
try:
hq = win32pdh.OpenQuery()
hcs = []
for item in items:
path = win32pdh.MakeCounterPath(
(None,object,instance, None, inum, item) )
hcs.append(win32pdh.AddCounter(hq, path))
win32pdh.CollectQueryData(hq)
type, val =
win32pdh.GetFormattedCounterValue(hcs[0],win32pdh.PDH_FMT_LONG)
except:
val=0
if (val == pid):
return Y
win32pdh.RemoveCounter(hcs[0])
win32pdh.CloseQuery(hq)
return N
else:
return N

TIA
TTFN
Guy
Jul 18 '05 #1
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