Lock the workstation if it is inactive for more than threshold time

threshold_time =10   # should be less than 60 

import subprocess

from ctypes import *

​

class LASTINPUTINFO(Structure):

    _fields_ = [

        ('cbSize', c_uint),

        ('dwTime', c_uint),

    ]

​

def get_idle_duration():

    lastInputInfo = LASTINPUTINFO()

    lastInputInfo.cbSize = sizeof(lastInputInfo)

    windll.user32.GetLastInputInfo(byref(lastInputInfo))

    millis = windll.kernel32.GetTickCount() - lastInputInfo.dwTime

    return int(millis / 1000.0)

​

class disable_file_system_redirection:

    _disable = windll.kernel32.Wow64DisableWow64FsRedirection

    _revert = windll.kernel32.Wow64RevertWow64FsRedirection

    def __enter__(self):

        self.old_value =c_long()

        self.success = self._disable(byref(self.old_value))

    def __exit__(self, type, value, traceback):

        if self.success:

            self._revert(self.old_value)

​

seconds=get_idle_duration()

​

m, s = divmod(seconds, 60)

h, m = divmod(m, 60)

d,h =divmod(h,24)

​

print("System Idle time in DAYS:HOURS:MIN:SEC")

print "%02d:%02d:%02d:%02d" % (d, h, m, s)

​

if ( m>threshold_time or  h>0):

    with disable_file_system_redirection():          

        ping = subprocess.Popen("rundll32.exe user32.dll, LockWorkStation",stdout=subprocess.PIPE,stderr = subprocess.PIPE,shell=True)

        out = ping.communicate()[0]

        output = str(out)

        print output

        print 'System has been locked'

​

​

​