tests/test-daemon.py

   1 # Copyright (c) 2010, 2011 Nicira, Inc.
   2 #
   3 # Licensed under the Apache License, Version 2.0 (the "License");
   4 # you may not use this file except in compliance with the License.
   5 # You may obtain a copy of the License at:
   6 #
   7 #     http://www.apache.org/licenses/LICENSE-2.0
   8 #
   9 # Unless required by applicable law or agreed to in writing, software
  10 # distributed under the License is distributed on an "AS IS" BASIS,
  11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 # See the License for the specific language governing permissions and
  13 # limitations under the License.
  14
  15 import argparse
  16 import signal
  17 import sys
  18 import time
  19
  20 import ovs.daemon
  21 import ovs.util
  22
  23
  24 def handler(signum, _):
  25     raise Exception("Signal handler called with %d" % signum)
  26
  27
  28 def main():
  29
  30     if sys.platform != 'win32':
  31         # signal.SIGHUP does not exist on Windows
  32         signal.signal(signal.SIGHUP, handler)
  33
  34     parser = argparse.ArgumentParser(
  35             description="Open vSwitch daemonization test program for Python.")
  36     parser.add_argument("-b", "--bail", action="store_true",
  37             help="Exit with an error after daemonize_start().")
  38
  39     ovs.daemon.add_args(parser)
  40     args = parser.parse_args()
  41     ovs.daemon.handle_args(args)
  42
  43     ovs.daemon.daemonize_start()
  44     if args.bail:
  45         sys.stderr.write("%s: exiting after daemonize_start() as requested\n"
  46                          % ovs.util.PROGRAM_NAME)
  47         sys.exit(1)
  48     ovs.daemon.daemonize_complete()
  49
  50     while True:
  51         time.sleep(1)
  52
  53
  54 if __name__ == '__main__':
  55     try:
  56         main()
  57     except SystemExit:
  58         # Let system.exit() calls complete normally
  59         raise
  60     except:
  61         sys.exit(ovs.daemon.RESTART_EXIT_CODE)