Update LAT version.
[zanchey/dispense2.git] / sql-edition / servers / VendServer.py
index 0f1daec..c82dda8 100755 (executable)
@@ -4,7 +4,7 @@
 USE_DB = 0
 
 import ConfigParser
-import sys, os, string, re, pwd, signal
+import sys, os, string, re, pwd, signal, math
 import logging, logging.handlers
 from traceback import format_tb
 if USE_DB: import pg
@@ -12,12 +12,29 @@ from time import time, sleep
 from popen2 import popen2
 from LATClient import LATClient, LATClientException
 from VendingMachine import VendingMachine, VendingException
+from MessageKeeper import MessageKeeper
 from HorizScroll import HorizScroll
 from random import random, seed
-from Idler import TrainIdler,GrayIdler
+from Idler import TrainIdler,GrayIdler,StringIdler
 import socket
 from posix import geteuid
 
+CREDITS="""
+This vending machine software brought to you by:
+Bernard Blackham
+Mark Tearle
+Nick Bannon
+Cameron Patrick
+and a collective of hungry alpacas.
+
+
+
+For a good time call +61 8 6488 3901
+
+
+
+"""
+
 GREETING = 'UCC SNACKS'
 PIN_LENGTH = 4
 
@@ -86,22 +103,27 @@ def get_pin(uid):
        try:
                info = pwd.getpwuid(uid)
        except KeyError:
+               logging.info('getting pin for uid %d: user not in password file'%uid)
                return None
        if info.pw_dir == None: return False
        pinfile = os.path.join(info.pw_dir, '.pin')
        try:
                s = os.stat(pinfile)
        except OSError:
+               logging.info('getting pin for uid %d: .pin not found in home directory'%uid)
                return None
        if s.st_mode & 077:
+               logging.info('getting pin for uid %d: .pin has wrong permissions'%uid)
                return None
        try:
                f = file(pinfile)
        except IOError:
+               logging.info('getting pin for uid %d: I cannot read pin file'%uid)
                return None
        pinstr = f.readline()
        f.close()
        if not re.search('^'+'[0-9]'*PIN_LENGTH+'$', pinstr):
+               logging.info('getting pin for uid %d: %s not a good pin'%(uid,repr(pinstr)))
                return None
        return int(pinstr)
 
@@ -111,8 +133,10 @@ def has_good_pin(uid):
 def verify_user_pin(uid, pin):
        if get_pin(uid) == pin:
                info = pwd.getpwuid(uid)
+               logging.info('accepted pin for uid %d (%s)'%(uid,info.pw_name))
                return info.pw_name
        else:
+               logging.info('refused pin for uid %d'%(uid))
                return None
 
 def door_open_mode(v):
@@ -157,54 +181,41 @@ 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
+
+idlers = []
+idler = None
+
+def setup_idlers(v):
+       global idlers, idler
+       idlers = [
+               StringIdler(v),
+               StringIdler(v, text=CREDITS),
+               StringIdler(v, text=str(math.pi) + "            "),
+               StringIdler(v, text=str(math.e) + "            "),
+               GrayIdler(v),
+               TrainIdler(v),
+               GrayIdler(v,one="*",zero="-"),
+               GrayIdler(v,one="/",zero="\\"),
+               GrayIdler(v,one="X",zero="O"),
+               GrayIdler(v,one="*",zero="-",reorder=1),
+               GrayIdler(v,one="/",zero="\\",reorder=1),
+               GrayIdler(v,one="X",zero="O",reorder=1),
+               ]
+       idler = choose_idler()
+
+def choose_idler():
+       global idler
+       idler = idlers[int(random()*len(idlers))]
+       idler.reset()
+
+def idle_step():
+       global idler
+       idler.next()
 
 def run_forever(rfh, wfh, options, cf):
        v = VendingMachine(rfh, wfh)
-       logging.debug('PING is', v.ping())
+       logging.debug('PING is ' + str(v.ping()))
 
        if USE_DB: db = DispenseDatabase(v, cf.DBServer, cf.DBName, cf.DBUser, cf.DBPassword)
        cur_user = ''
@@ -214,9 +225,7 @@ def run_forever(rfh, wfh, options, cf):
        mk = MessageKeeper(v)
        mk.set_message(GREETING)
        time_to_autologout = None
-       #idler = TrainIdler(v)
-       #idler = GrayIdler(v)
-       idler = GrayIdler(v,one="*",zero="-")
+       setup_idlers(v)
        time_to_idle = None
        last_timeout_refresh = None
 
@@ -247,15 +256,20 @@ def run_forever(rfh, wfh, options, cf):
                        # 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()
+               if time_to_idle == None and cur_user == '':
+                       time_to_idle = time() + 5
+                       choose_idler()
+               if time_to_idle is not None and cur_user != '': time_to_idle = None
+               if time_to_idle is not None and time() > time_to_idle: idle_step()
+               if time_to_idle is not None and time() > time_to_idle + 300:
+                       time_to_idle = time()
+                       choose_idler()
 
                mk.update_display()
 
                e = v.next_event(0)
                if e == None:
-                       e = v.next_event(0.1)
+                       e = v.next_event(0.05)
                        if e == None:
                                continue
                time_to_idle = None
@@ -283,6 +297,7 @@ def run_forever(rfh, wfh, options, cf):
                                if len(cur_user) == 5:
                                        uid = int(cur_user)
                                        if not has_good_pin(uid):
+                                               logging.info('user '+cur_user+' has a bad PIN')
                                                #mk.set_messages(
                                                        #[(center('INVALID'), False, 0.7),
                                                         #(center('PIN'), False, 0.7),
@@ -296,6 +311,7 @@ def run_forever(rfh, wfh, options, cf):
                                                continue
                                        cur_pin = ''
                                        mk.set_message('PIN: ')
+                                       logging.info('need pin for user %s'%cur_user)
                                        continue
                        elif len(cur_pin) < PIN_LENGTH:
                                if key == 11:
@@ -348,13 +364,16 @@ def run_forever(rfh, wfh, options, cf):
                                        # XXX this should move somewhere else:
                                        if cur_selection == '55':
                                                mk.set_message('OPENSESAME')
+                                               logging.info('dispensing a door for %s'%username)
                                                if geteuid() == 0:
                                                        ret = os.system('su - "%s" -c "dispense door"'%username)
                                                else:
                                                        ret = os.system('dispense door')
                                                if ret == 0:
+                                                       logging.info('door opened')
                                                        mk.set_message(center('DOOR OPEN'))
                                                else:
+                                                       logging.warning('user %s tried to dispense a bad door'%username)
                                                        mk.set_message(center('BAD DOOR'))
                                                sleep(1)
                                        elif cur_selection == '91':
@@ -378,10 +397,12 @@ def run_forever(rfh, wfh, options, cf):
 def connect_to_vend(options, cf):
        # Open vending machine via LAT?
        if options.use_lat:
+               logging.info('Connecting to vending machine using 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')
+               logging.info('Connecting to virtual vending machine on %s:%d'%(options.host,options.port))
                import socket
                sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0)
                sock.connect((options.host, options.port))
@@ -399,7 +420,7 @@ def parse_args():
        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('-s', '--syslog', dest='syslog', metavar='FACILITY', default=None, help='log output to given syslog facility')
        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')
@@ -437,9 +458,7 @@ class VendConfigFile:
                                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)
+                       raise SystemExit("Error reading config file "+config_file+": " + str(e))
 
 def create_pid_file(name):
        try:
@@ -458,9 +477,9 @@ def set_stuff_up():
        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()
+       set_up_logging(options)
        if options.pid_file != '': create_pid_file(options.pid_file)
 
        return options, config_opts
@@ -475,9 +494,10 @@ def clean_up_nicely(options, config_opts):
 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 not options.daemon:
+               stderr_logger = logging.StreamHandler(sys.stderr)
+               stderr_logger.setFormatter(logging.Formatter('%(levelname)s: %(message)s'))
+               logger.addHandler(stderr_logger)
        
        if options.log_file != '':
                try:
@@ -487,8 +507,8 @@ def set_up_logging(options):
                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')
+       if options.syslog != None:
+               sys_logger = logging.handlers.SysLogHandler('/dev/log', options.syslog)
                sys_logger.setFormatter(logging.Formatter('vendserver[%d]'%(os.getpid()) + ' %(levelname)s: %(message)s'))
                logger.addHandler(sys_logger)
 
@@ -505,8 +525,12 @@ def become_daemon():
        os.dup2(fd, 0)
        os.dup2(fd, 1)
        os.dup2(fd, 2)
-       if os.fork() != 0:
-               sys.exit(0)
+       try:
+               if os.fork() != 0:
+                       sys.exit(0)
+               os.setsid()
+       except OSError, e:
+               raise SystemExit('failed to fork: '+str(e))
 
 def do_vend_server(options, config_opts):
        while True:
@@ -539,6 +563,8 @@ if __name__ == '__main__':
                        clean_up_nicely(options, config_opts)
                        logging.warning("Vend Server stopped")
                        break
+               except SystemExit:
+                       break
                except:
                        (exc_type, exc_value, exc_traceback) = sys.exc_info()
                        tb = format_tb(exc_traceback, 20)

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