old_contents: #!/usr/bin/python
  import time
  
  status_file_dbg = 'data/uevent.tmp'
  
  capacity = 0
  is_charging = True
  status = 'Charging'
  
  pattern = """POWER_SUPPLY_NAME = BAT0
  POWER_SUPPLY_STATUS = {status}
  POWER_SUPPLY_PRESENT = 1
  POWER_SUPPLY_TECHNOLOGY = Li-poly
  POWER_SUPPLY_CYCLE_COUNT = 0
  POWER_SUPPLY_VOLTAGE_MIN_DESIGN = 7500000
  POWER_SUPPLY_VOLTAGE_NOW = 8112000
  POWER_SUPPLY_CURRENT_NOW = 2394000
  POWER_SUPPLY_CHARGE_FULL_DESIGN = 6480000
  POWER_SUPPLY_CHARGE_FULL = 6151000
  POWER_SUPPLY_CHARGE_NOW = 5945000
  POWER_SUPPLY_CAPACITY = {capacity}
  POWER_SUPPLY_CAPACITY_LEVEL = Normal
  POWER_SUPPLY_MODEL_NAME = DELL 0DRRP55
  POWER_SUPPLY_MANUFACTURER = Sanyo
  POWER_SUPPLY_SERIAL_NUMBER = 1358
  """
  
  
  def update_capacity():
      global capacity
      global is_charging
      global status
  
      if capacity <= 0:
          is_charging = True
      if capacity >= 100:
          is_charging = False
  
      direction = 1 if is_charging else -1
      capacity += 5 * direction
      status = 'Charging' if is_charging else 'Discharging'
      if capacity >= 95:
          status = 'Full'
  
  
  def fill_pattern():
      return pattern.format(status=status, capacity=capacity)
  
  
  def main():
      while True:
          update_capacity()
          print 'capacity: {0}, {1}'.format(capacity, status)
          with open(status_file_dbg, 'w') as f:
              f.write(fill_pattern())
          time.sleep(0.5)
  
  if __name__ == '__main__':
      main()
  
new_contents: #!/usr/bin/python
  import time
  import random
  
  status_file_dbg = 'data/uevent.tmp'
  
  capacity = 0
  is_charging = True
  status = 'Charging'
  
  pattern = """POWER_SUPPLY_NAME = BAT0
  POWER_SUPPLY_STATUS = {status}
  POWER_SUPPLY_PRESENT = 1
  POWER_SUPPLY_TECHNOLOGY = Li-poly
  POWER_SUPPLY_CYCLE_COUNT = 0
  POWER_SUPPLY_VOLTAGE_MIN_DESIGN = 7500000
  POWER_SUPPLY_VOLTAGE_NOW = 8112000
  POWER_SUPPLY_CURRENT_NOW = 2394000
  POWER_SUPPLY_CHARGE_FULL_DESIGN = 6480000
  POWER_SUPPLY_CHARGE_FULL = 6151000
  POWER_SUPPLY_CHARGE_NOW = 5945000
  POWER_SUPPLY_CAPACITY = {capacity}
  POWER_SUPPLY_CAPACITY_LEVEL = Normal
  POWER_SUPPLY_MODEL_NAME = DELL 0DRRP55
  POWER_SUPPLY_MANUFACTURER = Sanyo
  POWER_SUPPLY_SERIAL_NUMBER = 1358
  """
  
  
  def update_capacity():
      global capacity
      global is_charging
      global status
  
      if capacity <= 0:
          is_charging = True
      if capacity >= 105:
          is_charging = False
  
      direction = 1 if is_charging else -1
      step = random.randrange(-2, 6, 1)
      capacity += step * direction
      status = 'Charging' if is_charging else 'Discharging'
      if capacity >= 95:
          status = 'Full'
  
  
  def fill_pattern():
      return pattern.format(status=status, capacity=capacity)
  
  
  def main():
      while True:
          update_capacity()
          print 'capacity: {0}, {1}'.format(capacity, status)
          with open(status_file_dbg, 'w') as f:
              f.write(fill_pattern())
          time.sleep(0.5)
  
  if __name__ == '__main__':
      main()
  
subject: add random simulation