#!/usr/bin/python
# -*- coding: UTF-8 -*-
#
"""
Functions for checking the subprocesses rtl_fm and multimon-ng
Used in boswatch.py at startup and designated for watching-service

@author: 		Jens Herrmann
"""

import logging

from includes import globalVars  # Global variables


def checkRTL():
	"""
	check startup of rtl_fm

	@exception: OSError when rtl_fm returns an error
	@exception: Exception when checkRTL throws an unexpected error
	"""
	try:
		rtlLog = open(globalVars.log_path+"rtl_fm.log","r").read()
		if ("exiting" in rtlLog) or  ("Failed to open" in rtlLog):
			logging.debug("\n%s", rtlLog)
			raise OSError("starting rtl_fm returns an error")
	except OSError:
		raise
	except:
		# we couldn't work without rtl_fm
		logging.critical("cannot check rtl_fm.log")
		logging.debug("cannot check rtl_fm.log", exc_info=True)
		raise

def checkMultimon():
	"""
	check startup of multimon-ng

	@exception: OSError when multimon-ng returns an error
	@exception: Exception when checkMultimon throws an unexpected error
	"""
	try:
		multimonLog = open(globalVars.log_path+"multimon.log","r").read()
		if ("invalid" in multimonLog) or ("error" in multimonLog):
			logging.debug("\n%s", multimonLog)
			raise OSError("starting multimon-ng returns an error")
	except OSError:
		raise
	except:
		# we couldn't work without multimon-ng
		logging.critical("cannot check multimon.log")
		logging.debug("cannot check multimon.log", exc_info=True)
		raise