def verify_singleton():
"""Verifies that we are the single running navtopology process.
If a navtopology process is already running, we exit this process.
"""
try:
daemon.justme(PIDFILE_PATH)
except daemon.AlreadyRunningError as error:
print("navtopology is already running (%d)" % error.pid, file=sys.stderr)
sys.exit(1)
daemon.writepidfile(PIDFILE_PATH)
atexit.register(daemon.daemonexit, PIDFILE_PATH)
def verify_singleton(quiet=False):
"""Verify that we are the single running logengine process.
If a logengine process is already running, we exit this process.
"""
# Create a pidfile and delete it automagically when the process exits.
# Although we're not a daemon, we do want to prevent multiple simultaineous
# logengine processes.
try:
daemon.justme(PID_FILE)
except daemon.AlreadyRunningError as err:
if quiet:
sys.exit(0)
else:
print("logengine is already running (%d)" % err.pid, file=sys.stderr)
sys.exit(1)
daemon.writepidfile(PID_FILE)
atexit.register(daemon.daemonexit, PID_FILE)
unused_prefixes = Prefix.objects.filter(
gwportprefix__isnull=True).exclude(holy_vlans)
if unused_prefixes:
_logger.info("deleting unused prefixes: %s",
", ".join(p.net_address for p in unused_prefixes))
cursor = django.db.connection.cursor()
# Use raw SQL to avoid Django's emulated cascading deletes
cursor.execute('DELETE FROM prefix WHERE prefixid IN %s',
(tuple([p.id for p in unused_prefixes]), ))
def verify_singleton():
"""Verifies that we are the single running navtopology process.
If a navtopology process is already running, we exit this process.
"""
try:
daemon.justme(PIDFILE_PATH)
except daemon.AlreadyRunningError, error:
print >> sys.stderr, "navtopology is already running (%d)" % error.pid
sys.exit(1)
daemon.writepidfile(PIDFILE_PATH)
atexit.register(daemon.daemonexit, PIDFILE_PATH)
if __name__ == '__main__':
main()
"""
# Create a pidfile and delete it automagically when the process exits.
# Although we're not a daemon, we do want to prevent multiple simultaineous
# logengine processes.
pidfile = os.path.join(localstatedir, 'run', 'logengine.pid')
try:
daemon.justme(pidfile)
except daemon.AlreadyRunningError, e:
if quiet:
sys.exit(0)
else:
print >> sys.stderr, "logengine is already running (%d)" % e.pid
sys.exit(1)
daemon.writepidfile(pidfile)
atexit.register(daemon.daemonexit, pidfile)
def get_categories(cursor):
categories = {}
cursor.execute("select category from category")
for category, in cursor.fetchall():
if not categories.has_key(category):
categories[category] = category
return categories
def get_origins(cursor):
origins = {}
cursor.execute("select origin, name from origin")
def main():
bootstrap_django('snmptrapd')
# Verify that subsystem exists, if not insert it into database
verify_subsystem()
# Initialize and read startupconfig
global config
config = SnmptrapdConfig()
# Create parser and define options
opts = parse_args()
# When binding to a port < 1024 we need to be root
minport = min(port for addr, port in opts.address)
if minport < 1024:
if os.geteuid() != 0:
sys.exit("Must be root to bind to ports < 1024, exiting")
# Check if already running
try:
daemon.justme(pidfile)
except daemon.DaemonError as why:
sys.exit(why)
# Create SNMP agent object
server = agent.TrapListener(*opts.address)
server.open()
# We have bound to a port and can safely drop privileges
runninguser = NAV_CONFIG['NAV_USER']
try:
if os.geteuid() == 0:
daemon.switchuser(runninguser)
except daemon.DaemonError as why:
server.close()
sys.exit(why)
global handlermodules
nav.logs.init_stderr_logging()
_logger.debug("using %r as SNMP backend", agent.BACKEND)
# Load handlermodules
try:
_logger.debug('Trying to load handlermodules')
handlermodules = load_handler_modules(
config.get('snmptrapd', 'handlermodules').split(','))
except ModuleLoadError as why:
_logger.error("Could not load handlermodules %s" % why)
sys.exit(1)
addresses_text = ", ".join(
address_to_string(*addr) for addr in opts.address)
if not opts.foreground:
# Daemonize and listen for traps
try:
_logger.debug("Going into daemon mode...")
logfile = open(logfile_path, 'a')
daemon.daemonize(pidfile, stderr=logfile, stdout=logfile)
except daemon.DaemonError as why:
_logger.error("Could not daemonize: %s", why)
server.close()
sys.exit(1)
# Daemonized
_logger.info('snmptrapd is now running in daemon mode')
# Reopen lost db connection
# This is a workaround for a double free bug in psycopg 2.0.7
# which is why we don't need to keep the return value
getConnection('default')
# Reopen log files on SIGHUP
_logger.debug(
'Adding signal handler for reopening log files on SIGHUP.')
signal.signal(signal.SIGHUP, signal_handler)
# Exit on SIGTERM
signal.signal(signal.SIGTERM, signal_handler)
_logger.info("Snmptrapd started, listening on %s", addresses_text)
try:
server.listen(opts.community, trap_handler)
except SystemExit:
raise
except Exception as why:
_logger.critical("Fatal exception ocurred", exc_info=True)
else:
daemon.writepidfile(pidfile)
# Start listening and exit cleanly if interrupted.
try:
_logger.info("Listening on %s", addresses_text)
server.listen(opts.community, trap_handler)
except KeyboardInterrupt as why:
_logger.error("Received keyboard interrupt, exiting.")
server.close()
"""
# Create a pidfile and delete it automagically when the process exits.
# Although we're not a daemon, we do want to prevent multiple simultaineous
# logengine processes.
pidfile = os.path.join(localstatedir, 'run', 'logengine.pid')
try:
daemon.justme(pidfile)
except daemon.AlreadyRunningError, e:
if quiet:
sys.exit(0)
else:
print >> sys.stderr, "logengine is already running (%d)" % e.pid
sys.exit(1)
daemon.writepidfile(pidfile)
atexit.register(daemon.daemonexit, pidfile)
def get_categories(cursor):
categories = {}
cursor.execute("select category from category")
for category, in cursor.fetchall():
if not categories.has_key(category):
categories[category] = category
return categories
def get_origins(cursor):
origins = {}
cursor.execute("select origin, name from origin")
for origin, name in cursor.fetchall():