Re: [python-win32] Need a value from pywin32
We have a winner!
Huge thanks from me even though I wasn’t the OP because I've wanted to know how
to do this for a while and just started to get my feet wet in this arena!!! I
now have a VERY GOOD EXAMPLE of how to start looking at doing a complex task
like this with all the nested references. UGH!
In [16]: get_idle_time(2) # session id = 2
Out[16]: 0.0156271
Please note that line wraps (and or a missing newline) in the previous email
may cause copy/paste issues in Eryk's code around these lines:
winsta.WinStationQueryInformationW.restype = wintypes.BOOLEAN
# this needs to be a newline
winsta.WinStationQueryInformationW.argtypes = (
wintypes.HANDLE, # ServerHandle
wintypes.ULONG, # SessionId
ctypes.c_long, # WinStationInformationClass
wintypes.LPVOID, # pWinStationInformation
wintypes.ULONG, # WinStationInformationLength
wintypes.PULONG, # pReturnLength
)
I HOPE THIS HELPS AND THANK YOU VERY MUCH!
Steven
-Original Message-
From: Eryk Sun
Sent: Wednesday, June 22, 2022 1:28 PM
To: Steven Manross
Cc: python-win32@python.org
Subject: Re: [python-win32] Need a value from pywin32
On 6/21/22, Steven Manross wrote:
>
> class WinStationInformation(ctypes.Structure):
> __fields__ = [
> ('ConnectState', ctypes.c_long),
> ('WinStationName', ctypes.wintypes.WCHAR),
> ('LogonId', ctypes.c_ulong),
> ('ConnectTime', ctypes.wintypes.LARGE_INTEGER),
> ('DisconnectTime', ctypes.wintypes.LARGE_INTEGER),
> ('LastInputTime', ctypes.wintypes.LARGE_INTEGER),
> ('LogonTime', ctypes.wintypes.LARGE_INTEGER),
> ('Status', ctypes.c_int()),
> ('Domain', ctypes.wintypes.WCHAR * (17 + 1)),
> ('UserName', ctypes.wintypes.WCHAR * (20 + 1)),
> ('CurrentTime', ctypes.wintypes.LARGE_INTEGER),
> ]
The above definition is incorrect for `WinStationName` and `Status`.
Defining the PROTOCOLSTATUS type for `Status` is tedious. Note also that the
ctypes attribute to set is `_fields_`, not `__fields__`, so the above struct is
actually defined with no fields (i.e. zero size).
Here's an example that defines a get_idle_time() function, based on the
difference between the current time and the last input time in the session.
import ctypes
from ctypes import wintypes
winsta = ctypes.WinDLL('winsta', use_last_error=True)
WINSTATIONNAME_LENGTH = 32
DOMAIN_LENGTH = 17
USERNAME_LENGTH = 20
MAX_THINWIRECACHE = 4
SERVERNAME_CURRENT = None
LOGONID_CURRENT = -1
# WINSTATIONINFOCLASS
WinStationInformation = 8
# WINSTATIONSTATECLASS
State_Active = 0
State_Connected = 1
State_ConnectQuery = 2
State_Shadow = 3
State_Disconnected = 4
State_Idle = 5
State_Listen = 6
State_Reset = 7
State_Down = 8
State_Init = 9
class TSHARE_COUNTERS(ctypes.Structure):
__slots__ = ()
_fields_ = (
('Reserved', wintypes.ULONG),
)
class PROTOCOLCOUNTERS(ctypes.Structure):
__slots__ = ()
class SPECIFIC(ctypes.Union):
__slots__ = ()
_fields_ = (
('TShareCounters', TSHARE_COUNTERS),
('Reserved', wintypes.ULONG * 100),
)
_fields_ = (
('WdBytes', wintypes.ULONG),
('WdFrames', wintypes.ULONG),
('WaitForOutBuf', wintypes.ULONG),
('Frames', wintypes.ULONG),
('Bytes', wintypes.ULONG),
('CompressedBytes', wintypes.ULONG),
('CompressFlushes', wintypes.ULONG),
('Errors', wintypes.ULONG),
('Timeouts', wintypes.ULONG),
('AsyncFramingError', wintypes.ULONG),
('AsyncOverrunError', wintypes.ULONG),
('AsyncOverflowError', wintypes.ULONG),
('AsyncParityError', wintypes.ULONG),
('TdErrors', wintypes.ULONG),
('ProtocolType', wintypes.USHORT),
('Length', wintypes.USHORT),
('Specific', SPECIFIC),
)
class THINWIRECACHE (ctypes.Structure):
__slots__ = ()
_fields_ = (
('CacheReads', wintypes.ULONG),
('CacheHits', wintypes.ULONG),
)
class RESERVED_CACHE(ctypes.Structure):
__slots__ = ()
_fields_ = (
('ThinWireCache[', THINWIRECACHE * MAX_THINWIRECACHE),
)
class CACHE_STATISTICS(ctypes.Structure):
__slots__ = ()
class SPECIFIC(ctypes.Union):
__slots__ = ()
_fields_ = (
('ReservedCacheStats', RESERVED_CACHE),
('TShareCacheStats', wintypes.ULONG),
('Reserved', wintypes.ULONG * 20),
)
_fields_ = (
('ProtocolType', wintypes.USHORT),
('Length', wintypes.USHORT),
('Specific', SPECIFIC),
)
class PROTOCOLSTATUS(ctypes.Structure):
__slots__ = ()
_fields_ = (
('Output', PROTOCOLCOUNTERS),
('Input', PROTOCOLCOUNTERS),
('Cache', CACHE_STATISTICS),
('AsyncSignal', wintypes.ULONG),
('AsyncSignalMask', wintypes.ULONG),
)
class WINSTATIONINFORMATION(ctypes.Structure):
__slots__ = ()
_fields_ = (
('ConnectState', ctypes.c_long),
Re: [python-win32] Need a value from pywin32
On 6/21/22, Steven Manross wrote:
>
> class WinStationInformation(ctypes.Structure):
> __fields__ = [
> ('ConnectState', ctypes.c_long),
> ('WinStationName', ctypes.wintypes.WCHAR),
> ('LogonId', ctypes.c_ulong),
> ('ConnectTime', ctypes.wintypes.LARGE_INTEGER),
> ('DisconnectTime', ctypes.wintypes.LARGE_INTEGER),
> ('LastInputTime', ctypes.wintypes.LARGE_INTEGER),
> ('LogonTime', ctypes.wintypes.LARGE_INTEGER),
> ('Status', ctypes.c_int()),
> ('Domain', ctypes.wintypes.WCHAR * (17 + 1)),
> ('UserName', ctypes.wintypes.WCHAR * (20 + 1)),
> ('CurrentTime', ctypes.wintypes.LARGE_INTEGER),
> ]
The above definition is incorrect for `WinStationName` and `Status`.
Defining the PROTOCOLSTATUS type for `Status` is tedious. Note also
that the ctypes attribute to set is `_fields_`, not `__fields__`, so
the above struct is actually defined with no fields (i.e. zero size).
Here's an example that defines a get_idle_time() function, based on
the difference between the current time and the last input time in the
session.
import ctypes
from ctypes import wintypes
winsta = ctypes.WinDLL('winsta', use_last_error=True)
WINSTATIONNAME_LENGTH = 32
DOMAIN_LENGTH = 17
USERNAME_LENGTH = 20
MAX_THINWIRECACHE = 4
SERVERNAME_CURRENT = None
LOGONID_CURRENT = -1
# WINSTATIONINFOCLASS
WinStationInformation = 8
# WINSTATIONSTATECLASS
State_Active = 0
State_Connected = 1
State_ConnectQuery = 2
State_Shadow = 3
State_Disconnected = 4
State_Idle = 5
State_Listen = 6
State_Reset = 7
State_Down = 8
State_Init = 9
class TSHARE_COUNTERS(ctypes.Structure):
__slots__ = ()
_fields_ = (
('Reserved', wintypes.ULONG),
)
class PROTOCOLCOUNTERS(ctypes.Structure):
__slots__ = ()
class SPECIFIC(ctypes.Union):
__slots__ = ()
_fields_ = (
('TShareCounters', TSHARE_COUNTERS),
('Reserved', wintypes.ULONG * 100),
)
_fields_ = (
('WdBytes', wintypes.ULONG),
('WdFrames', wintypes.ULONG),
('WaitForOutBuf', wintypes.ULONG),
('Frames', wintypes.ULONG),
('Bytes', wintypes.ULONG),
('CompressedBytes', wintypes.ULONG),
('CompressFlushes', wintypes.ULONG),
('Errors', wintypes.ULONG),
('Timeouts', wintypes.ULONG),
('AsyncFramingError', wintypes.ULONG),
('AsyncOverrunError', wintypes.ULONG),
('AsyncOverflowError', wintypes.ULONG),
('AsyncParityError', wintypes.ULONG),
('TdErrors', wintypes.ULONG),
('ProtocolType', wintypes.USHORT),
('Length', wintypes.USHORT),
('Specific', SPECIFIC),
)
class THINWIRECACHE (ctypes.Structure):
__slots__ = ()
_fields_ = (
('CacheReads', wintypes.ULONG),
('CacheHits', wintypes.ULONG),
)
class RESERVED_CACHE(ctypes.Structure):
__slots__ = ()
_fields_ = (
('ThinWireCache[', THINWIRECACHE * MAX_THINWIRECACHE),
)
class CACHE_STATISTICS(ctypes.Structure):
__slots__ = ()
class SPECIFIC(ctypes.Union):
__slots__ = ()
_fields_ = (
('ReservedCacheStats', RESERVED_CACHE),
('TShareCacheStats', wintypes.ULONG),
('Reserved', wintypes.ULONG * 20),
)
_fields_ = (
('ProtocolType', wintypes.USHORT),
('Length', wintypes.USHORT),
('Specific', SPECIFIC),
)
class PROTOCOLSTATUS(ctypes.Structure):
__slots__ = ()
_fields_ = (
('Output', PROTOCOLCOUNTERS),
('Input', PROTOCOLCOUNTERS),
('Cache', CACHE_STATISTICS),
('AsyncSignal', wintypes.ULONG),
('AsyncSignalMask', wintypes.ULONG),
)
class WINSTATIONINFORMATION(ctypes.Structure):
__slots__ = ()
_fields_ = (
('ConnectState', ctypes.c_long),
('WinStationName', wintypes.WCHAR * (WINSTATIONNAME_LENGTH + 1)),
('LogonId', wintypes.ULONG),
('ConnectTime', wintypes.LARGE_INTEGER),
('DisconnectTime', wintypes.LARGE_INTEGER),
('LastInputTime', wintypes.LARGE_INTEGER),
('LogonTime', wintypes.LARGE_INTEGER),
('Status', PROTOCOLSTATUS),
('Domain', wintypes.WCHAR * (DOMAIN_LENGTH + 1)),
('UserName', wintypes.WCHAR * (USERNAME_LENGTH + 1)),
('CurrentTime', wintypes.LARGE_INTEGER)
)
winsta.WinStationQueryInformationW.restype = wintypes.BOOLEAN
winsta.WinStationQueryInformationW.argtypes = (
wintypes.HANDLE, # ServerHandle
wintypes.ULONG, # SessionId
ctypes.c_long, # WinStationInformationClass
wintypes.LPVOID, # pWinStationInformation
wintypes.ULONG, # WinStationInformationLength
wintypes.PULONG, # pReturnLength
)
def get_idle_time(session_id=LOGONID_CURRENT,
server_handle=SERVERNAME_CURRENT):
info = WINSTATIONINFORMATION()
rlen = wintypes.ULONG()
if not winsta.WinStationQueryInformationW(
server_handle, session_id,
Re: [python-win32] Need a value from pywin32
Thanks a lot for the help!!!
This is no longer Excepting... But the Result is 0 and there doesn't seem to
be any data in the Buf structure or indication that there were results in
RtnLen... I get to debug this more.. YAY!!!
Steven
-Original Message-
From: python-win32 On
Behalf Of Tim Roberts
Sent: Tuesday, June 21, 2022 10:04 PM
To: python-win32@python.org
Subject: Re: [python-win32] Need a value from pywin32
On 6/21/22 13:39, Steven Manross wrote:
> I was intrigued by this and I would like to get it to work, but I cannot...
> I know I'm doing something wrong, but don't know what. I will leave this for
> the archives, and maybe it will help someone else some day.
> ...
> def get_wts_info(session_id):
> '''
> Get WTS Info
> '''
> # This only tries to work on the local server currently but I get
> an access violation running the WinStationQueryInformationW line
>
> Buf = ctypes.POINTER(WinStationInformation)()
> BufLen = 260
>
> hWinSta = ctypes.windll.LoadLibrary("WINSTA.DLL")
> if hWinSta:
> winsta_handle = hWinSta._handle
> print(f'winsta_handle = {winsta_handle}')
> QueryInfoHandle =
> ctypes.windll.kernel32.GetProcAddress(ctypes.c_ulonglong(winsta_handle
> ), b"WinStationQueryInformationW")
>
> # This handle is 0... possibly because of the numeric
> conversion from the winsta_handle to a ctypes.c_ulonglong ??? unsure
No, 0 is the error return that means the name was not found.
You shouldn't need to use LoadLibrary and GetProcAddress. ctypes does that for
you automatically.
winsta = ctypes.WinDLL('winsta.dll')
winsta.WinStationQueryInformationW( 0, session_id, 8, ctypes.byref(Buf),
BufLen, ctypes.byref(RtnLen))
If you have Visual Studio, you can try doing "link /dump /exports
\windows\system32\winsta.dll" to make sure it has that entry point.
--
Tim Roberts, t...@probo.com
Providenza & Boekelheide, Inc.
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