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gns3-server/gns3server/main.py

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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
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# Copyright (C) 2015 GNS3 Technologies Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""
Entry point of the server. It's support daemonize the process
"""
import os
import sys
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def daemonize():
"""
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Do the UNIX double-fork magic for properly detaching process
"""
try:
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pid = os.fork()
if pid > 0:
# Exit first parent
sys.exit(0)
except OSError as e:
print("First fork failed: %d (%s)\n" % (e.errno, e.strerror), file=sys.stderr)
sys.exit(1)
# Decouple from parent environment
os.setsid()
os.umask(700)
# Do second fork
try:
pid = os.fork()
if pid > 0:
# Exit from second parent
sys.exit(0)
except OSError as e:
print("Second fork failed: %d (%s)\n" % (e.errno, e.strerror), file=sys.stderr)
sys.exit(1)
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def main():
"""
Entry point for GNS3 server
"""
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if not sys.platform.startswith("win"):
if "--daemon" in sys.argv:
daemonize()
from gns3server.run import run
run()
if __name__ == '__main__':
main()