def putpid(cls):
'''Store current PID to file; should only be called in daemon process.'''
if LGI.getpid() is not None:
LGI.pilot.log.warning('daemon already running, not overwriting pid file')
return False
f = open(Config.getConfig('LGI')['PidFile'], 'w')
f.write(str(os.getpid()))
f.close()
return True
def getpid(cls):
'''Return PID of daemon process, if any'''
# make sure PID file exists
pidfile = Config.getConfig('LGI')['PidFile']
if not os.path.exists(pidfile):
return None
# get it
try:
f = open(pidfile, 'r')
pid = int(f.read())
f.close()
except (OSError, ValueError):
return None
# verify it's still running; if not, remove
try:
os.kill(pid, 0)
except OSError:
os.unlink(pidfile)
return None
# ok!
return pid
def delpid(cls):
'''Remove current PID file; should only be called at end of daemon process.'''
os.unlink(Config.getConfig('LGI')['PidFile'])