do even more logging
[zanchey/dispense2.git] / sql-edition / servers / VendServer.py
index 447dcf7..a09ac2a 100755 (executable)
@@ -1,10 +1,22 @@
 #!/usr/bin/python
 # vim:ts=4
 
-import sys, os, string, time, re, pwd
-import pg
-from LATClient import LATClient
-from VendingMachine import VendingMachine
+USE_DB = 0
+
+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 LATClient import LATClient, LATClientException
+from VendingMachine import VendingMachine, VendingException
+from HorizScroll import HorizScroll
+from random import random, seed
+from Idler import TrainIdler,GrayIdler
+import socket
+from posix import geteuid
 
 GREETING = 'UCC SNACKS'
 PIN_LENGTH = 4
@@ -13,23 +25,24 @@ DOOR = 1
 SWITCH = 2
 KEY = 3
 
+class DispenseDatabaseException(Exception): pass
+
 class DispenseDatabase:
-       def __init__(self, vending_machine):
+       def __init__(self, vending_machine, host, name, user, password):
                self.vending_machine = vending_machine
-               self.db = pg.DB(dbname = 'dispense', host = 'dispense.ucc.gu.uwa.edu.au', user = 'vendserver', passwd = 'revresdnev')
+               self.db = pg.DB(dbname = name, host = host, user = user, passwd = password)
                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()
@@ -43,6 +56,32 @@ class DispenseDatabase:
                        self.process_requests()
                        notify = self.db.getnotify()
 
+def scroll_options(username, mk, welcome = False):
+       if welcome:
+               msg = [(center('WELCOME'), False, 0.8),
+                          (center(username), False, 0.8)]
+       else:
+               msg = []
+       choices = ' '*10+'CHOICES: '
+       try:
+               coke_machine = file('/home/other/coke/coke_contents')
+               cokes = coke_machine.readlines()
+               coke_machine.close()
+       except:
+               cokes = []
+               pass
+       for c in cokes:
+               c = c.strip()
+               (slot_num, price, slot_name) = c.split(' ', 2)
+               if slot_name == 'dead': continue
+               choices += '%s8-%s (%sc) '%(slot_num, slot_name, price)
+       choices += '55-DOOR '
+       choices += 'OR A SNACK. '
+       choices += '99 TO READ AGAIN. '
+       choices += 'CHOICE?   '
+       msg.append((choices, False, None))
+       mk.set_messages(msg)
+
 def get_pin(uid):
        try:
                info = pwd.getpwuid(uid)
@@ -76,187 +115,443 @@ def verify_user_pin(uid, pin):
        else:
                return None
 
-def door_open_mode(vending_machine):
-       print "Entering open door mode"
-       v.display("DOOR  OPEN")
+def door_open_mode(v):
+       logging.warning("Entering open door mode")
+       v.display("-FEED  ME-")
        while True:
                e = v.next_event()
                if e == None: break
                (event, params) = e
                if event == DOOR:
                        if params == 1: # door closed
-                               v.display("BYE BYE!")
-                               time.sleep(1)
+                               logging.warning('Leaving open door mode')
+                               v.display("-YUM YUM!-")
+                               sleep(1)
                                return
 
-if __name__ == '__main__':
-       # Open vending machine via LAT
-       latclient = LATClient(service = 'VEND', password = 'dmscptd')
-       (rfh, wfh) = latclient.get_fh()
+def cookie(v):
+       seed(time())
+       messages = ['  WASSUP! ', 'PINK FISH ', ' SECRETS ', '  ESKIMO  ', ' FORTUNES ', 'MORE MONEY']
+       choice = int(random()*len(messages))
+       msg = messages[choice]
+       left = range(len(msg))
+       for i in range(len(msg)):
+               if msg[i] == ' ': left.remove(i)
+       reveal = 1
+       while left:
+               s = ''
+               for i in range(0, len(msg)):
+                       if i in left:
+                               if reveal == 0:
+                                       left.remove(i)
+                                       s += msg[i]
+                               else:
+                                       s += chr(int(random()*26)+ord('A'))
+                               reveal += 1
+                               reveal %= 17
+                       else:
+                               s += msg[i]
+               v.display(s)
+
+def center(str):
+       LEN = 10
+       return ' '*((LEN-len(str))/2)+str
+
+class MessageKeeper:
+       def __init__(self, vendie):
+               # Each element of scrolling_message should be a 3-tuple of
+               # ('message', True/False if it is to be repeated, time to display)
+               self.scrolling_message = []
+               self.v = vendie
+               self.next_update = None
+
+       def set_message(self, string):
+               self.scrolling_message = [(string, False, None)]
+               self.update_display(True)
+
+       def set_messages(self, strings):
+               self.scrolling_message = strings
+               self.update_display(True)
+
+       def update_display(self, forced = False):
+               if not forced and self.next_update != None and time() < self.next_update:
+                       return
+               if len(self.scrolling_message) > 0:
+                       if len(self.scrolling_message[0][0]) > 10:
+                               (m, r, t) = self.scrolling_message[0]
+                               a = []
+                               exp = HorizScroll(m).expand(padding = 0, wraparound = True)
+                               if t == None:
+                                       t = 0.1
+                               else:
+                                       t = t / len(exp)
+                               for x in exp:
+                                       a.append((x, r, t))
+                               del self.scrolling_message[0]
+                               self.scrolling_message = a + self.scrolling_message
+                       newmsg = self.scrolling_message[0]
+                       if newmsg[2] != None:
+                               self.next_update = time() + newmsg[2]
+                       else:
+                               self.next_update = None
+                       self.v.display(self.scrolling_message[0][0])
+                       if self.scrolling_message[0][1]:
+                               self.scrolling_message.append(self.scrolling_message[0])
+                       del self.scrolling_message[0]
+
+       def done(self):
+               return len(self.scrolling_message) == 0
+
+def run_forever(rfh, wfh, options, cf):
        v = VendingMachine(rfh, wfh)
-       print 'PING is', v.ping()
-       #print 'BEEP is', v.beep()
-       #print 'VEND 11 is', v.vend('11')
-       #print 'SILENCE is', v.silence()
-       #print 'DISPLAY is', v.display('WELCOME')
-       print 'S is', v.get_switches()
-
-       db = DispenseDatabase(v)
-       db.process_requests()
+       logging.debug('PING is', v.ping())
+
+       if USE_DB: db = DispenseDatabase(v, cf.DBServer, cf.DBName, cf.DBUser, cf.DBPassword)
        cur_user = ''
        cur_pin = ''
        cur_selection = ''
 
-       scrolling_message = [GREETING]
-       scrolling_wraps = False
-       need_repaint = True
-       timeout = None
-       last_tick = time.time()
+       mk = MessageKeeper(v)
+       mk.set_message(GREETING)
+       time_to_autologout = None
+       #idler = TrainIdler(v)
+       #idler = GrayIdler(v)
+       idler = GrayIdler(v,one="*",zero="-")
+       time_to_idle = None
+       last_timeout_refresh = None
 
        while True:
-               if time.time() > last_tick+1:
-                       if timeout != None and timeout > 0: timeout -= 1
-                       if len(scrolling_message) > 0:
-                               need_repaint = True
-               if need_repaint and len(scrolling_message) > 0:
-                       v.display(scrolling_message[0])
-                       if scrolling_wraps:
-                               scrolling_message.append(scrolling_message[0])
-                       del scrolling_message[0]
-                       need_repaint = False
-               if timeout == 0:
-                       timeout = None
+               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()
+                       if time_left < 6 and (last_timeout_refresh is None or last_timeout_refresh > time_left):
+                               mk.set_message('LOGOUT: '+str(int(time_left)))
+                               last_timeout_refresh = int(time_left)
+                               cur_selection = ''
+
+               if time_to_autologout != None and time_to_autologout - time() <= 0:
+                       time_to_autologout = None
                        cur_user = ''
                        cur_pin = ''
                        cur_selection = ''
-                       scrolling_message = [GREETING]
-                       scrolling_wraps = False
-                       need_repaint = True
-                       continue
+                       mk.set_message(GREETING)
+
+               if time_to_autologout and not mk.done(): time_to_autologout = None
+               if cur_user == '' and time_to_autologout: time_to_autologout = None
+               if len(cur_pin) == PIN_LENGTH and mk.done() and time_to_autologout == None:
+                       # start autologout
+                       time_to_autologout = time() + 15
+
+               if time_to_idle == None and cur_user == '': time_to_idle = time() + 60
+               if time_to_idle != None and cur_user != '': time_to_idle = None
+               if time_to_idle is not None and time() > time_to_idle: idler.next()
 
-               while True:
-                       e = v.next_event(1)
-                       if e == None: break
-                       (event, params) = e
-                       print e
-                       if event == DOOR:
-                               if params == 0:
-                                       door_open_mode(v);
+               mk.update_display()
+
+               e = v.next_event(0)
+               if e == None:
+                       e = v.next_event(0.1)
+                       if e == None:
+                               continue
+               time_to_idle = None
+               (event, params) = e
+               logging.debug('Got event: ' + repr(e))
+               if event == DOOR:
+                       if params == 0:
+                               door_open_mode(v);
+                               cur_user = ''
+                               cur_pin = ''
+                               mk.set_message(GREETING)
+               elif event == SWITCH:
+                       # don't care right now.
+                       pass
+               elif event == KEY:
+                       key = params
+                       # complicated key handling here:
+                       if len(cur_user) < 5:
+                               if key == 11:
                                        cur_user = ''
-                                       cur_pin = ''
-                                       scrolling_message = [GREETING]
-                                       scrolling_wraps = False
-                                       need_repaint = True
-                       elif event == SWITCH:
-                               # don't care right now.
-                               pass
-                       elif event == KEY:
-                               key = params
-                               # complicated key handling here:
-                               if len(cur_user) < 5:
-                                       if key == 11:
+                                       mk.set_message(GREETING)
+                                       continue
+                               cur_user += chr(key + ord('0'))
+                               mk.set_message('UID: '+cur_user)
+                               if len(cur_user) == 5:
+                                       uid = int(cur_user)
+                                       if not has_good_pin(uid):
+                                               #mk.set_messages(
+                                                       #[(center('INVALID'), False, 0.7),
+                                                        #(center('PIN'), False, 0.7),
+                                                        #(center('SETUP'), False, 1.0),
+                                                        #(GREETING, False, None)])
+                                               mk.set_messages(
+                                                       [(' '*10+'INVALID PIN SETUP'+' '*10, False, 3),
+                                                        (GREETING, False, None)])
                                                cur_user = ''
-                                               scrolling_message = [GREETING]
-                                               scrolling_wraps = False
-                                               need_repaint = True
-                                               continue
-                                       cur_user += chr(key + ord('0'))
-                                       scrolling_message = []
-                                       v.display('UID: '+cur_user)
-                                       if len(cur_user) == 5:
-                                               uid = int(cur_user)
-                                               if not has_good_pin(uid):
-                                                       scrolling_message = [' INVALID  ', '   PIN', '  `SETUP', GREETING]
-                                                       scrolling_wraps = False
-                                                       need_repaint = True
-                                                       cur_user = ''
-                                                       cur_pin = ''
-                                                       continue
-                                               cur_pin = ''
-                                               v.display('PIN: ')
-                                               scrolling_message = []
-                                               continue
-                               elif len(cur_pin) < PIN_LENGTH:
-                                       if key == 11:
-                                               if cur_pin == '':
-                                                       cur_user = ''
-                                                       scrolling_message = [GREETING]
-                                                       scrolling_wraps = False
-                                                       need_repaint = True
-                                                       continue
                                                cur_pin = ''
-                                               v.display('PIN: ')
-                                               scrolling_message = []
                                                continue
-                                       cur_pin += chr(key + ord('0'))
-                                       v.display('PIN: '+'X'*len(cur_pin))
-                                       scrolling_message = []
-                                       if len(cur_pin) == PIN_LENGTH:
-                                               username = verify_user_pin(int(cur_user), int(cur_pin))
-                                               if username:
-                                                       v.beep(0, False)
-                                                       cur_selection = ''
-
-                                                       scrolling_message = [' WELCOME  ', username]
-                                                       scrolling_message.append('OR A SNACK')
-                                                       scrolling_wraps = True
-                                                       need_repaint = True
-                                                       continue
-                                               else:
-                                                       v.beep(40, False)
-                                                       scrolling_message = [' BAD PIN  ', '  SORRY   ', GREETING]
-                                                       scrolling_wraps = False
-                                                       need_repaint = True
-
-                                                       cur_user = ''
-                                                       cur_pin = ''
-                                                       continue
-                               elif len(cur_selection) == 0:
-                                       if key == 11:
-                                               cur_pin = ''
+                                       cur_pin = ''
+                                       mk.set_message('PIN: ')
+                                       continue
+                       elif len(cur_pin) < PIN_LENGTH:
+                               if key == 11:
+                                       if cur_pin == '':
                                                cur_user = ''
-                                               cur_selection = ''
-                                               v.display('BYE!')
-                                               time.sleep(0.5)
-                                               scrolling_message = [GREETING]
-                                               scrolling_wraps = False
-                                               need_repaint = True
+                                               mk.set_message(GREETING)
                                                continue
-                                       cur_selection += chr(key + ord('0'))
-                                       scrolling_message = []
-                                       v.display('SELECT: '+cur_selection)
-                               elif len(cur_selection) == 1:
-                                       if key == 11:
+                                       cur_pin = ''
+                                       mk.set_message('PIN: ')
+                                       continue
+                               cur_pin += chr(key + ord('0'))
+                               mk.set_message('PIN: '+'X'*len(cur_pin))
+                               if len(cur_pin) == PIN_LENGTH:
+                                       username = verify_user_pin(int(cur_user), int(cur_pin))
+                                       if username:
+                                               v.beep(0, False)
                                                cur_selection = ''
-                                               scrolling_message = []
-                                               v.display('SELECT: ')
+                                               scroll_options(username, mk, True)
                                                continue
                                        else:
-                                               cur_selection += chr(key + ord('0'))
-                                               #make_selection(cur_selection)
-                                               # XXX this should move somewhere else:
-                                               if cur_selection == '55':
-                                                       v.display('GOT DOOR?')
-                                                       os.system('su - "%s" -c "dispense door"'%username)
-                                               elif cur_selection[1] == '8':
-                                                       v.display('GOT COKE?')
-                                                       os.system('su - "%s" -c "dispense %s"'%(username, cur_selection[0]))
+                                               v.beep(40, False)
+                                               mk.set_messages(
+                                                       [(center('BAD PIN'), False, 1.0),
+                                                        (center('SORRY'), False, 0.5),
+                                                        (GREETING, False, None)])
+                                               cur_user = ''
+                                               cur_pin = ''
+                                               continue
+                       elif len(cur_selection) == 0:
+                               if key == 11:
+                                       cur_pin = ''
+                                       cur_user = ''
+                                       cur_selection = ''
+                                       mk.set_messages(
+                                               [(center('BYE!'), False, 1.5),
+                                                (GREETING, False, None)])
+                                       continue
+                               cur_selection += chr(key + ord('0'))
+                               mk.set_message('SELECT: '+cur_selection)
+                               time_to_autologout = None
+                       elif len(cur_selection) == 1:
+                               if key == 11:
+                                       cur_selection = ''
+                                       time_to_autologout = None
+                                       scroll_options(username, mk)
+                                       continue
+                               else:
+                                       cur_selection += chr(key + ord('0'))
+                                       #make_selection(cur_selection)
+                                       # XXX this should move somewhere else:
+                                       if cur_selection == '55':
+                                               mk.set_message('OPENSESAME')
+                                               if geteuid() == 0:
+                                                       ret = os.system('su - "%s" -c "dispense door"'%username)
                                                else:
-                                                       v.display('HERES A '+cur_selection)
-                                                       v.vend(cur_selection)
-                                               time.sleep(0.5)
-                                               v.display('THANK YOU')
-                                               time.sleep(0.5)
+                                                       ret = os.system('dispense door')
+                                               if ret == 0:
+                                                       mk.set_message(center('DOOR OPEN'))
+                                               else:
+                                                       mk.set_message(center('BAD DOOR'))
+                                               sleep(1)
+                                       elif cur_selection == '91':
+                                               cookie(v)
+                                       elif cur_selection == '99':
+                                               scroll_options(username, mk)
                                                cur_selection = ''
-                                               scrolling_message = [
-                                                       'LOGOUT: 5',
-                                                       'LOGOUT: 4',
-                                                       'LOGOUT: 3',
-                                                       'LOGOUT: 2',
-                                                       'LOGOUT: 1',
-                                                       'BYE BYE!']
-                                               timeout = 7
-                                               scrolling_wraps = True
-                                               need_repaint = True
-
-               db.handle_events()
+                                               continue
+                                       elif cur_selection[1] == '8':
+                                               v.display('GOT COKE?')
+                                               os.system('su - "%s" -c "dispense %s"'%(username, cur_selection[0]))
+                                       else:
+                                               v.display('HERES A '+cur_selection)
+                                               v.vend(cur_selection)
+                                       sleep(0.5)
+                                       v.display('THANK YOU')
+                                       sleep(0.5)
+                                       cur_selection = ''
+                                       time_to_autologout = time() + 8
+
+def connect_to_vend(options, cf):
+       # Open vending machine via LAT?
+       if options.use_lat:
+               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')
+               import socket
+               sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0)
+               sock.connect((options.host, options.port))
+               rfh = sock.makefile('r')
+               wfh = sock.makefile('w')
+               
+       return rfh, wfh
+
+def parse_args():
+       from optparse import OptionParser
+
+       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('--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:
+               op.error('extra command line arguments: ' + ' '.join(args))
+
+       return options
+
+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)
+
+                       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:
+               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, config_opts)
+               except (LATClientException, socket.error), e:
+                       (exc_type, exc_value, exc_traceback) = sys.exc_info()
+                       del exc_traceback
+                       logging.error("Connection error: "+str(exc_type)+" "+str(e))
+                       logging.info("Trying again in 5 seconds.")
+                       sleep(5)
+                       continue
+               
+               try:
+                       run_forever(rfh, wfh, options, config_opts)
+               except VendingException:
+                       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.info('Starting Vend Server')
+                       do_vend_server(options, config_opts)
+                       logging.warning('Vend Server finished unexpectedly, restarting')
+               except KeyboardInterrupt:
+                       logging.info("Killed by signal, cleaning up")
+                       clean_up_nicely(options, config_opts)
+                       logging.info("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...)")
+

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