def main():
# Verify that subsystem exists, if not insert it into database
verifySubsystem()
# Initialize and read startupconfig
global config
config = ConfigParser.ConfigParser()
config.read(configfile)
# Create parser and define options
global opts
opts, addresses = parse_args()
# When binding to a port < 1024 we need to be root
minport = min(port for addr, port in addresses)
if minport < 1024:
if os.geteuid() != 0:
print("Must be root to bind to ports < 1024, exiting")
sys.exit(-1)
# Check if already running
pidfile = nav.buildconf.localstatedir + "/run/snmptrapd.pid"
try:
daemon.justme(pidfile)
except daemon.DaemonError, why:
print why
sys.exit(-1)
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)
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.
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)
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.
pidfile = os.path.join(localstatedir, 'run', 'logengine.pid')
try:
daemon.justme(pidfile)
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(pidfile)
atexit.register(daemon.daemonexit, pidfile)
def main():
# Verify that subsystem exists, if not insert it into database
verify_subsystem()
# Initialize and read startupconfig
global config
config = ConfigParser.ConfigParser()
config.read(configfile)
# 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:
print("Must be root to bind to ports < 1024, exiting")
sys.exit(-1)
# Check if already running
try:
daemon.justme(pidfile)
except daemon.DaemonError as why:
print(why)
sys.exit(-1)
# Create SNMP agent object
server = agent.TrapListener(*opts.address)
server.open()
# We have bound to a port and can safely drop privileges
runninguser = config.get('snmptrapd', 'user')
try:
if os.geteuid() == 0:
daemon.switchuser(runninguser)
except daemon.DaemonError as why:
print(why)
server.close()
sys.exit(-1)
global handlermodules
nav.logs.init_generic_logging(stderr=True, read_config=True)
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 opts.daemon:
# 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; reopen log files
nav.logs.reopen_log_files()
logger.debug('Daemonization complete; reopened log files.')
# 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:
# 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 keyboardinterrupt, exiting.")
server.close()