class CheckPIDFileController(DaemonController):
def __init__(self, pidfile, *args, **kw):
super(CheckPIDFileController, self).__init__(*args, **kw)
self.__pidfile = Path(pidfile)
@property
def pidfile(self):
return self.__pidfile
@property
def is_running(self):
if not self.pidfile.exists():
return False
if not self.pidfile.isfile():
raise Exception("pidfile '%s' is not a file" % (self.pidfile,))
try:
pid = int(self.__pidfile.open().readline(16))
except:
self.logger.exception("Error reading pidfile %s" % (self.pidfile))
raise
try:
os.kill(pid, 0)
return True
except OSError, e:
if e.errno == errno.ESRCH:
return False
raise
