tlock.py - amprolla - devuan's apt repo merger
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       tlock.py (607B)
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            1 # See LICENSE file for copyright and license details.
            2 
            3 """
            4 Lockfile functions
            5 """
            6 
            7 from time import time
            8 from os import remove
            9 from os.path import isfile
           10 import sys
           11 
           12 from lib.config import lockpath
           13 from lib.log import info
           14 
           15 
           16 def check_lock():
           17     """
           18     Checks if a lockfile is active, and creates one if not.
           19     """
           20     if isfile(lockpath):
           21         info('Lockfile found. Defering operation.')
           22         sys.exit(1)
           23 
           24     with open(lockpath, 'w') as lock:
           25         lock.write(str(int(time())))
           26 
           27 
           28 def free_lock():
           29     """
           30     Frees an active lockfile.
           31     """
           32     if isfile(lockpath):
           33         remove(lockpath)