GFS2 filelock test

filelock.py

import time
import fcntl, struct

lockfile = open('/media/test/lockfile', 'w')
lockdata = struct.pack('hhllhh', fcntl.F_WRLCK, 0, 0, 0, 0, 0)
while 1:
   try:
        fcntl.fcntl(lockfile.fileno(), fcntl.F_SETLK, lockdata)
        print "I have the lock."
        time.sleep(1)
   except KeyboardInterrupt:
        print('interrupted!')
        break
   except:
        print "Lock aquisition failed."
        time.sleep(1)

lockfile.close()