206 lines
7.2 KiB
Python
206 lines
7.2 KiB
Python
"""
|
|
Windows Process Control
|
|
|
|
winprocess.run launches a child process and returns the exit code.
|
|
Optionally, it can:
|
|
redirect stdin, stdout & stderr to files
|
|
run the command as another user
|
|
limit the process's running time
|
|
control the process window (location, size, window state, desktop)
|
|
Works on Windows NT, 2000 & XP. Requires Mark Hammond's win32
|
|
extensions.
|
|
|
|
This code is free for any purpose, with no warranty of any kind.
|
|
-- John B. Dell'Aquila <jbd@alum.mit.edu>
|
|
"""
|
|
|
|
import win32api, win32process, win32security
|
|
import win32event, win32con, msvcrt, win32gui
|
|
import os
|
|
|
|
|
|
def logonUser(loginString):
|
|
"""
|
|
Login as specified user and return handle.
|
|
loginString: 'Domain\nUser\nPassword'; for local
|
|
login use . or empty string as domain
|
|
e.g. '.\nadministrator\nsecret_password'
|
|
"""
|
|
domain, user, passwd = loginString.split('\n')
|
|
return win32security.LogonUser(
|
|
user,
|
|
domain,
|
|
passwd,
|
|
win32con.LOGON32_LOGON_INTERACTIVE,
|
|
win32con.LOGON32_PROVIDER_DEFAULT
|
|
)
|
|
|
|
|
|
class Process:
|
|
"""
|
|
A Windows process.
|
|
"""
|
|
|
|
def __init__(self, cmd, login=None,
|
|
hStdin=None, hStdout=None, hStderr=None,
|
|
show=1, xy=None, xySize=None,
|
|
desktop=None):
|
|
"""
|
|
Create a Windows process.
|
|
cmd: command to run
|
|
login: run as user 'Domain\nUser\nPassword'
|
|
hStdin, hStdout, hStderr:
|
|
handles for process I/O; default is caller's stdin,
|
|
stdout & stderr
|
|
show: wShowWindow (0=SW_HIDE, 1=SW_NORMAL, ...)
|
|
xy: window offset (x, y) of upper left corner in pixels
|
|
xySize: window size (width, height) in pixels
|
|
desktop: lpDesktop - name of desktop e.g. 'winsta0\\default'
|
|
None = inherit current desktop
|
|
'' = create new desktop if necessary
|
|
|
|
User calling login requires additional privileges:
|
|
Act as part of the operating system [not needed on Windows XP]
|
|
Increase quotas
|
|
Replace a process level token
|
|
Login string must EITHER be an administrator's account
|
|
(ordinary user can't access current desktop - see Microsoft
|
|
Q165194) OR use desktop='' to run another desktop invisibly
|
|
(may be very slow to startup & finalize).
|
|
"""
|
|
si = win32process.STARTUPINFO()
|
|
si.dwFlags = (win32con.STARTF_USESTDHANDLES ^
|
|
win32con.STARTF_USESHOWWINDOW)
|
|
if hStdin is None:
|
|
si.hStdInput = win32api.GetStdHandle(win32api.STD_INPUT_HANDLE)
|
|
else:
|
|
si.hStdInput = hStdin
|
|
if hStdout is None:
|
|
si.hStdOutput = win32api.GetStdHandle(win32api.STD_OUTPUT_HANDLE)
|
|
else:
|
|
si.hStdOutput = hStdout
|
|
if hStderr is None:
|
|
si.hStdError = win32api.GetStdHandle(win32api.STD_ERROR_HANDLE)
|
|
else:
|
|
si.hStdError = hStderr
|
|
si.wShowWindow = show
|
|
if xy is not None:
|
|
si.dwX, si.dwY = xy
|
|
si.dwFlags ^= win32con.STARTF_USEPOSITION
|
|
if xySize is not None:
|
|
si.dwXSize, si.dwYSize = xySize
|
|
si.dwFlags ^= win32con.STARTF_USESIZE
|
|
if desktop is not None:
|
|
si.lpDesktop = desktop
|
|
procArgs = (None, # appName
|
|
cmd, # commandLine
|
|
None, # processAttributes
|
|
None, # threadAttributes
|
|
1, # bInheritHandles
|
|
win32process.CREATE_NEW_CONSOLE, # dwCreationFlags
|
|
None, # newEnvironment
|
|
None, # currentDirectory
|
|
si) # startupinfo
|
|
if login is not None:
|
|
hUser = logonUser(login)
|
|
win32security.ImpersonateLoggedOnUser(hUser)
|
|
procHandles = win32process.CreateProcessAsUser(hUser, *procArgs)
|
|
win32security.RevertToSelf()
|
|
else:
|
|
procHandles = win32process.CreateProcess(*procArgs)
|
|
self.hProcess, self.hThread, self.PId, self.TId = procHandles
|
|
|
|
def wait(self, mSec=None):
|
|
"""
|
|
Wait for process to finish or for specified number of
|
|
milliseconds to elapse.
|
|
"""
|
|
if mSec is None:
|
|
mSec = win32event.INFINITE
|
|
return win32event.WaitForSingleObject(self.hProcess, mSec)
|
|
|
|
def kill(self, gracePeriod=5000):
|
|
"""
|
|
Kill process. Try for an orderly shutdown via WM_CLOSE. If
|
|
still running after gracePeriod (5 sec. default), terminate.
|
|
"""
|
|
win32gui.EnumWindows(self.__close__, 0)
|
|
if self.wait(gracePeriod) != win32event.WAIT_OBJECT_0:
|
|
win32process.TerminateProcess(self.hProcess, 0)
|
|
win32api.Sleep(100) # wait for resources to be released
|
|
|
|
def __close__(self, hwnd, dummy):
|
|
"""
|
|
EnumWindows callback - sends WM_CLOSE to any window
|
|
owned by this process.
|
|
"""
|
|
TId, PId = win32process.GetWindowThreadProcessId(hwnd)
|
|
if PId == self.PId:
|
|
win32gui.PostMessage(hwnd, win32con.WM_CLOSE, 0, 0)
|
|
|
|
def exitCode(self):
|
|
"""
|
|
Return process exit code.
|
|
"""
|
|
return win32process.GetExitCodeProcess(self.hProcess)
|
|
|
|
|
|
def run(cmd, mSec=None, stdin=None, stdout=None, stderr=None, **kw):
|
|
"""
|
|
Run cmd as a child process and return exit code.
|
|
mSec: terminate cmd after specified number of milliseconds
|
|
stdin, stdout, stderr:
|
|
file objects for child I/O (use hStdin etc. to attach
|
|
handles instead of files); default is caller's stdin,
|
|
stdout & stderr;
|
|
kw: see Process.__init__ for more keyword options
|
|
"""
|
|
if stdin is not None:
|
|
kw['hStdin'] = msvcrt.get_osfhandle(stdin.fileno())
|
|
if stdout is not None:
|
|
kw['hStdout'] = msvcrt.get_osfhandle(stdout.fileno())
|
|
if stderr is not None:
|
|
kw['hStderr'] = msvcrt.get_osfhandle(stderr.fileno())
|
|
child = Process(cmd, **kw)
|
|
if child.wait(mSec) != win32event.WAIT_OBJECT_0:
|
|
child.kill()
|
|
raise WindowsError('process timeout exceeded')
|
|
return child.exitCode()
|
|
|
|
|
|
if __name__ == '__main__':
|
|
|
|
# Pipe commands to a shell and display the output in notepad
|
|
print('Testing winprocess.py...')
|
|
|
|
import tempfile
|
|
|
|
timeoutSeconds = 15
|
|
cmdString = """\
|
|
REM Test of winprocess.py piping commands to a shell.\r
|
|
REM This 'notepad' process will terminate in %d seconds.\r
|
|
vol\r
|
|
net user\r
|
|
_this_is_a_test_of_stderr_\r
|
|
""" % timeoutSeconds
|
|
|
|
cmd_name = tempfile.mktemp()
|
|
out_name = cmd_name + '.txt'
|
|
try:
|
|
cmd = open(cmd_name, "w+b")
|
|
out = open(out_name, "w+b")
|
|
cmd.write(cmdString.encode('mbcs'))
|
|
cmd.seek(0)
|
|
print('CMD.EXE exit code:', run('cmd.exe', show=0, stdin=cmd,
|
|
stdout=out, stderr=out))
|
|
cmd.close()
|
|
print('NOTEPAD exit code:', run('notepad.exe %s' % out.name,
|
|
show=win32con.SW_MAXIMIZE,
|
|
mSec=timeoutSeconds*1000))
|
|
out.close()
|
|
finally:
|
|
for n in (cmd_name, out_name):
|
|
try:
|
|
os.unlink(cmd_name)
|
|
except os.error:
|
|
pass
|