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)