USE_DB = 0
-import sys, os, string, re, pwd
+import ConfigParser
+import sys, os, string, re, pwd, signal
+import logging, logging.handlers
+from traceback import format_tb
if USE_DB: import pg
from time import time, sleep
from popen2 import popen2
from random import random, seed
from Idler import TrainIdler,GrayIdler
import socket
-from traceback import print_tb
+from posix import geteuid
GREETING = 'UCC SNACKS'
PIN_LENGTH = 4
SWITCH = 2
KEY = 3
+class DispenseDatabaseException(Exception): pass
+
class DispenseDatabase:
def __init__(self, vending_machine, host, name, user, password):
self.vending_machine = vending_machine
self.db.query('LISTEN vend_requests')
def process_requests(self):
- print 'processing'
+ logging.debug('database processing')
query = 'SELECT request_id, request_slot FROM vend_requests WHERE request_handled = false'
try:
outstanding = self.db.query(query).getresult()
except (pg.error,), db_err:
- sys.stderr.write('Failed to query database: %s\n'%(db_err.strip()))
- return
+ raise DispenseDatabaseException('Failed to query database: %s\n'%(db_err.strip()))
for (id, slot) in outstanding:
(worked, code, string) = self.vending_machine.vend(slot)
- print (worked, code, string)
+ logging.debug (str((worked, code, string)))
if worked:
query = 'SELECT vend_success(%s)'%id
self.db.query(query).getresult()
return None
def door_open_mode(v):
- print "Entering open door mode"
+ logging.warning("Entering open door mode")
v.display("-FEED ME-")
while True:
e = v.next_event()
(event, params) = e
if event == DOOR:
if params == 1: # door closed
+ logging.warning('Leaving open door mode')
v.display("-YUM YUM!-")
sleep(1)
return
def done(self):
return len(self.scrolling_message) == 0
-def run_forever(rfh, wfh):
+def run_forever(rfh, wfh, options, cf):
v = VendingMachine(rfh, wfh)
- print 'PING is', v.ping()
+ logging.debug('PING is ' + str(v.ping()))
- if USE_DB: db = DispenseDatabase(v, DBServer, DBName, DBUser, DBPassword)
+ if USE_DB: db = DispenseDatabase(v, cf.DBServer, cf.DBName, cf.DBUser, cf.DBPassword)
cur_user = ''
cur_pin = ''
cur_selection = ''
last_timeout_refresh = None
while True:
- if USE_DB: db.handle_events()
+ if USE_DB:
+ try:
+ db.handle_events()
+ except DispenseDatabaseException, e:
+ logging.error('Database error: '+str(e))
if time_to_autologout != None:
time_left = time_to_autologout - time()
continue
time_to_idle = None
(event, params) = e
- print e
+ logging.debug('Got event: ' + repr(e))
if event == DOOR:
if params == 0:
door_open_mode(v);
# XXX this should move somewhere else:
if cur_selection == '55':
mk.set_message('OPENSESAME')
- ret = os.system('su - "%s" -c "dispense door"'%username)
+ if geteuid() == 0:
+ ret = os.system('su - "%s" -c "dispense door"'%username)
+ else:
+ ret = os.system('dispense door')
if ret == 0:
mk.set_message(center('DOOR OPEN'))
else:
cur_selection = ''
time_to_autologout = time() + 8
-# FIXME: a less ugly way of passing all these options would be nice
-def connect_to_vend(options, DBServer, DBName, DBUser, DBPassword, ServiceName, ServicePassword, ServerName, ConnectPassword, PrivPassword):
- # Open vending machine via LAT
+def connect_to_vend(options, cf):
+ # Open vending machine via LAT?
if options.use_lat:
- latclient = LATClient(service = ServiceName, password = ServicePassword, server_name = ServerName, connect_password = ConnectPassword, priv_password = PrivPassword)
+ latclient = LATClient(service = cf.ServiceName, password = cf.ServicePassword, server_name = cf.ServerName, connect_password = cf.ConnectPassword, priv_password = cf.PrivPassword)
rfh, wfh = latclient.get_fh()
else:
#(rfh, wfh) = popen2('../../virtualvend/vvend.py')
op = OptionParser(usage="%prog [OPTION]...")
op.add_option('-f', '--config-file', default='/etc/dispense/servers.conf', metavar='FILE', dest='config_file', help='use the specified config file instead of /etc/dispense/servers.conf')
- op.add_option('-v', '--virtualvend', action='store_false', default=True, dest='use_lat', help='use the virtual vending server instead of LAT')
+ op.add_option('--virtualvend', action='store_false', default=True, dest='use_lat', help='use the virtual vending server instead of LAT')
op.add_option('-n', '--hostname', dest='host', default='localhost', help='the hostname to connect to for virtual vending machine mode (default: localhost)')
op.add_option('-p', '--port', dest='port', default=5150, type='int', help='the port number to connect to (default: 5150)')
+ op.add_option('-l', '--log-file', metavar='FILE', dest='log_file', default='', help='log output to the specified file')
+ op.add_option('-s', '--syslog', dest='syslog', action='store_true', default=False, help='log output to syslog')
+ op.add_option('-d', '--daemon', dest='daemon', action='store_true', default=False, help='run as a daemon')
+ op.add_option('-v', '--verbose', dest='verbose', action='store_true', default=False, help='spit out lots of debug output')
+ op.add_option('-q', '--quiet', dest='quiet', action='store_true', default=False, help='only report errors')
+ op.add_option('--pid-file', dest='pid_file', metavar='FILE', default='', help='store daemon\'s pid in the given file')
options, args = op.parse_args()
if len(args) != 0:
return options
-if __name__ == '__main__':
- import ConfigParser
+config_options = {
+ 'DBServer': ('Database', 'Server'),
+ 'DBName': ('Database', 'Name'),
+ 'DBUser': ('VendingMachine', 'DBUser'),
+ 'DBPassword': ('VendingMachine', 'DBPassword'),
+
+ 'ServiceName': ('VendingMachine', 'ServiceName'),
+ 'ServicePassword': ('VendingMachine', 'Password'),
+
+ 'ServerName': ('DecServer', 'Name'),
+ 'ConnectPassword': ('DecServer', 'ConnectPassword'),
+ 'PrivPassword': ('DecServer', 'PrivPassword'),
+ }
+
+class VendConfigFile:
+ def __init__(self, config_file, options):
+ try:
+ cp = ConfigParser.ConfigParser()
+ cp.read(config_file)
- options = parse_args()
+ for option in options:
+ section, name = options[option]
+ value = cp.get(section, name)
+ self.__dict__[option] = value
+
+ except ConfigParser.Error, e:
+ logging.critical("Error reading config file "+config_file+": " + str(e))
+ logging.critical("Bailing out")
+ sys.exit(1)
+def create_pid_file(name):
try:
- cp = ConfigParser.ConfigParser()
- cp.read(options.config_file)
- DBServer = cp.get('Database', 'Server')
- DBName = cp.get('Database', 'Name')
- DBUser = cp.get('VendingMachine', 'DBUser')
- DBPassword = cp.get('VendingMachine', 'DBPassword')
-
- ServiceName = cp.get('VendingMachine', 'ServiceName')
- ServicePassword = cp.get('VendingMachine', 'Password')
-
- ServerName = cp.get('DecServer', 'Name')
- ConnectPassword = cp.get('DecServer', 'ConnectPassword')
- PrivPassword = cp.get('DecServer', 'PrivPassword')
- except ConfigParser.Error, e:
- print "Error reading config file: " + str(e)
- sys.exit(1)
+ pid_file = file(name, 'w')
+ pid_file.write('%d\n'%os.getpid())
+ pid_file.close()
+ except IOError, e:
+ logging.warning('unable to write to pid file '+name+': '+str(e))
+
+def set_stuff_up():
+ def do_nothing(signum, stack):
+ signal.signal(signum, do_nothing)
+ def stop_server(signum, stack): raise KeyboardInterrupt
+ signal.signal(signal.SIGHUP, do_nothing)
+ signal.signal(signal.SIGTERM, stop_server)
+ signal.signal(signal.SIGINT, stop_server)
+
+ options = parse_args()
+ set_up_logging(options)
+ config_opts = VendConfigFile(options.config_file, config_options)
+ if options.daemon: become_daemon()
+ if options.pid_file != '': create_pid_file(options.pid_file)
+
+ return options, config_opts
+def clean_up_nicely(options, config_opts):
+ if options.pid_file != '':
+ try:
+ os.unlink(options.pid_file)
+ logging.debug('Removed pid file '+options.pid_file)
+ except OSError: pass # if we can't delete it, meh
+
+def set_up_logging(options):
+ logger = logging.getLogger()
+
+ stderr_logger = logging.StreamHandler(sys.stderr)
+ stderr_logger.setFormatter(logging.Formatter('%(levelname)s: %(message)s'))
+ logger.addHandler(stderr_logger)
+
+ if options.log_file != '':
+ try:
+ file_logger = logging.FileHandler(options.log_file)
+ file_logger.setFormatter(logging.Formatter('%(asctime)s %(levelname)s: %(message)s'))
+ logger.addHandler(file_logger)
+ except IOError, e:
+ logger.warning('unable to write to log file '+options.log_file+': '+str(e))
+
+ if options.syslog:
+ sys_logger = logging.handlers.SysLogHandler('/dev/log', 'daemon')
+ sys_logger.setFormatter(logging.Formatter('vendserver[%d]'%(os.getpid()) + ' %(levelname)s: %(message)s'))
+ logger.addHandler(sys_logger)
+
+ if options.quiet:
+ logger.setLevel(logging.WARNING)
+ elif options.verbose:
+ logger.setLevel(logging.DEBUG)
+ else:
+ logger.setLevel(logging.INFO)
+
+def become_daemon():
+ dev_null = file('/dev/null')
+ fd = dev_null.fileno()
+ os.dup2(fd, 0)
+ os.dup2(fd, 1)
+ os.dup2(fd, 2)
+ if os.fork() != 0:
+ sys.exit(0)
+
+def do_vend_server(options, config_opts):
while True:
try:
- rfh, wfh = connect_to_vend(options, DBServer, DBName, DBUser, DBPassword, ServiceName, ServicePassword, ServerName, ConnectPassword, PrivPassword)
+ rfh, wfh = connect_to_vend(options, config_opts)
except (LATClientException, socket.error), e:
(exc_type, exc_value, exc_traceback) = sys.exc_info()
- print
- print "Connection error: "+str(exc_type)+" "+str(e)
- print_tb(exc_traceback)
del exc_traceback
- print "Trying again in 5 seconds."
+ logging.error("Connection error: "+str(exc_type)+" "+str(e))
+ logging.info("Trying again in 5 seconds.")
sleep(5)
continue
+
try:
- run_forever(rfh, wfh)
+ run_forever(rfh, wfh, options, config_opts)
except VendingException:
- print
- print "Connection died, trying again..."
+ logging.error("Connection died, trying again...")
+ logging.info("Trying again in 5 seconds.")
+ sleep(5)
+
+if __name__ == '__main__':
+ options, config_opts = set_stuff_up()
+ while True:
+ try:
+ logging.warning('Starting Vend Server')
+ do_vend_server(options, config_opts)
+ logging.error('Vend Server finished unexpectedly, restarting')
+ except KeyboardInterrupt:
+ logging.info("Killed by signal, cleaning up")
+ clean_up_nicely(options, config_opts)
+ logging.warning("Vend Server stopped")
+ break
+ except:
+ (exc_type, exc_value, exc_traceback) = sys.exc_info()
+ tb = format_tb(exc_traceback, 20)
+ del exc_traceback
+
+ logging.critical("Uh-oh, unhandled " + str(exc_type) + " exception")
+ logging.critical("Message: " + str(exc_value))
+ logging.critical("Traceback:")
+ for event in tb:
+ for line in event.split('\n'):
+ logging.critical(' '+line)
+ logging.critical("This message should be considered a bug in the Vend Server.")
+ logging.critical("Please report this to someone who can fix it.")
+ sleep(10)
+ logging.warning("Trying again anyway (might not help, but hey...)")
git.ucc.asn.au / uccvend-vendserver.git / blobdiff
UCC git Repository :: git.ucc.asn.au