[Eradicatore]

Here's the working one without the update to avoid changes at night (when nobody is there to see it in the office):

#!/usr/bin/python
import time;
import glob;
import random;
import subprocess;

def mainLoop ():
   # first make sure the screen saver is showing
   state = subprocess.check_output(['lipc-get-prop', 'com.lab126.powerd', 'state']).rstrip();
   while (state == "active"):
      subprocess.call(['lipc-set-prop', 'com.lab126.powerd', 'powerButton', '1']);
      time.sleep(1);
      state = subprocess.check_output(['lipc-get-prop', 'com.lab126.powerd', 'state']);

   last = "";
   while 1 == 1:
      state = subprocess.check_output(['lipc-get-prop', 'com.lab126.powerd', 'state']).rstrip();
      if (state ==  "active"):
          # User wants to stop, so they pressed "wake" button
          # maybe rm .lock file here?
          break;

      file = random.choice(glob.glob('/mnt/us/extensions/quoteRotation/bin/png/*.png'));
      # should add check for empty list of png's here
      while file == last:
          file = random.choice(glob.glob('/mnt/us/extensions/quoteRotation/bin/png/*.png'));

      last = file;
      tstring = time.strftime("%H:%M:%S")
      subprocess.call(['eips','-f','-g',file]);
      sleepForMin(60);

def getCurrTimeInSec ():
   "This function returns current time in seconds"
   return int(subprocess.check_output(['date','+%s']).rstrip())

def sleepForMin (mins):
   "this function will use the RTC to wake back up after so many minutes"
   endTime = str(getCurrTimeInSec() + (mins * 20));

   # disable/reset current alarm
   subprocess.call("echo 0 > /sys/class/rtc/rtc0/wakealarm", shell=True)

   # set new alarm
   subprocess.call("echo {} > /sys/class/rtc/rtc0/wakealarm".format(endTime), shell=True)

   alarmContents = (subprocess.check_output(['cat','/sys/class/rtc/rtc0/wakealarm']).rstrip())

                                                                                              
   if (endTime == alarmContents):                                                             
      while getCurrTimeInSec() < int(endTime):                                                
         remainingWait = int(endTime) - getCurrTimeInSec()                                    
         if (remainingWait > 0):                                                              
            # wait for device to suspend or to resume - this covers the sleep period during which the
            # time counting does not work reliably                                                   
            subprocess.check_output("lipc-wait-event -s {} com.lab126.powerd resuming || true".format(str(remainingWait)), shell=True)
   else:                                                                                                                              
      print "failed compare"                                                                                                          
                                                                                                                                      
   # not sure whether this is required                                                                                                
   #subprocess.check_output("lipc-set-prop com.lab126.powerd -i deferSuspend 1", shell=True)                                          
   return                                                                                                                             
                                                                                                                                      
mainLoop()