1 """Miscellaneous functions for the mudpy engine."""
3 # Copyright (c) 2004-2019 mudpy authors. Permission to use, copy,
4 # modify, and distribute this software is granted under terms
5 # provided in the LICENSE file distributed with this software.
25 """An element of the universe."""
27 def __init__(self, key, universe, origin=None):
28 """Set up a new element."""
30 # keep track of our key name
33 # keep track of what universe it's loading into
34 self.universe = universe
36 # set of facet keys from the universe
37 self.facethash = dict()
39 # not owned by a user by default (used for avatars)
42 # no contents in here by default
45 if self.key.find(".") > 0:
46 self.group, self.subkey = self.key.split(".")[-2:]
49 self.subkey = self.key
50 if self.group not in self.universe.groups:
51 self.universe.groups[self.group] = {}
53 # get an appropriate origin
55 self.universe.add_group(self.group)
56 origin = self.universe.files[
57 self.universe.origins[self.group]["fallback"]]
59 # record or reset a pointer to the origin file
60 self.origin = self.universe.files[origin.source]
62 # add or replace this element in the universe
63 self.universe.contents[self.key] = self
64 self.universe.groups[self.group][self.subkey] = self
67 """Create a new element and replace this one."""
68 args = (self.key, self.universe, self.origin)
73 """Remove an element from the universe and destroy it."""
74 for facet in dict(self.facethash):
75 self.remove_facet(facet)
76 del self.universe.groups[self.group][self.subkey]
77 del self.universe.contents[self.key]
81 """Return a list of non-inherited facets for this element."""
84 def has_facet(self, facet):
85 """Return whether the non-inherited facet exists."""
86 return facet in self.facets()
88 def remove_facet(self, facet):
89 """Remove a facet from the element."""
90 if ".".join((self.key, facet)) in self.origin.data:
91 del self.origin.data[".".join((self.key, facet))]
92 if facet in self.facethash:
93 del self.facethash[facet]
94 self.origin.modified = True
97 """Return a list of the element's inheritance lineage."""
98 if self.has_facet("inherit"):
99 ancestry = self.get("inherit")
102 for parent in ancestry[:]:
103 ancestors = self.universe.contents[parent].ancestry()
104 for ancestor in ancestors:
105 if ancestor not in ancestry:
106 ancestry.append(ancestor)
111 def get(self, facet, default=None):
112 """Retrieve values."""
116 return self.origin.data[".".join((self.key, facet))]
117 except (KeyError, TypeError):
119 if self.has_facet("inherit"):
120 for ancestor in self.ancestry():
121 if self.universe.contents[ancestor].has_facet(facet):
122 return self.universe.contents[ancestor].get(facet)
126 def set(self, facet, value):
128 if not self.origin.is_writeable() and not self.universe.loading:
129 # break if there is an attempt to update an element from a
130 # read-only file, unless the universe is in the midst of loading
131 # updated data from files
132 raise PermissionError("Altering elements in read-only files is "
134 # Coerce some values to appropriate data types
135 # TODO(fungi) Move these to a separate validation mechanism
136 if facet in ["loglevel"]:
138 elif facet in ["administrator"]:
141 # The canonical node for this facet within its origin
142 node = ".".join((self.key, facet))
144 if node not in self.origin.data or self.origin.data[node] != value:
145 # Be careful to only update the origin's contents when required,
146 # since that affects whether the backing file gets written
147 self.origin.data[node] = value
148 self.origin.modified = True
150 # Make sure this facet is included in the element's facets
151 self.facethash[facet] = self.origin.data[node]
153 def append(self, facet, value):
154 """Append value to a list."""
155 newlist = self.get(facet)
158 if type(newlist) is not list:
159 newlist = list(newlist)
160 newlist.append(value)
161 self.set(facet, newlist)
171 add_terminator=False,
174 """Convenience method to pass messages to an owner."""
187 def can_run(self, command):
188 """Check if the user can run this command object."""
190 # has to be in the commands group
191 if command not in self.universe.groups["command"].values():
194 # avatars of administrators can run any command
195 elif self.owner and self.owner.account.get("administrator"):
198 # everyone can run non-administrative commands
199 elif not command.get("administrative"):
202 # otherwise the command cannot be run by this actor
206 # pass back the result
209 def update_location(self):
210 """Make sure the location's contents contain this element."""
211 area = self.get("location")
212 if area in self.universe.contents:
213 self.universe.contents[area].contents[self.key] = self
215 def clean_contents(self):
216 """Make sure the element's contents aren't bogus."""
217 for element in self.contents.values():
218 if element.get("location") != self.key:
219 del self.contents[element.key]
221 def go_to(self, area):
222 """Relocate the element to a specific area."""
223 current = self.get("location")
224 if current and self.key in self.universe.contents[current].contents:
225 del universe.contents[current].contents[self.key]
226 if area in self.universe.contents:
227 self.set("location", area)
228 self.universe.contents[area].contents[self.key] = self
232 """Relocate the element to its default location."""
233 self.go_to(self.get("default_location"))
234 self.echo_to_location(
235 "You suddenly realize that " + self.get("name") + " is here."
238 def move_direction(self, direction):
239 """Relocate the element in a specified direction."""
240 motion = self.universe.contents["mudpy.movement.%s" % direction]
241 enter_term = motion.get("enter_term")
242 exit_term = motion.get("exit_term")
243 self.echo_to_location("%s exits %s." % (self.get("name"), exit_term))
244 self.send("You exit %s." % exit_term, add_prompt=False)
246 self.universe.contents[
247 self.get("location")].link_neighbor(direction)
249 self.echo_to_location("%s arrives from %s." % (
250 self.get("name"), enter_term))
252 def look_at(self, key):
253 """Show an element to another element."""
255 element = self.universe.contents[key]
257 name = element.get("name")
259 message += "$(cyn)" + name + "$(nrm)$(eol)"
260 description = element.get("description")
262 message += description + "$(eol)"
263 portal_list = list(element.portals().keys())
266 message += "$(cyn)[ Exits: " + ", ".join(
269 for element in self.universe.contents[
272 if element.get("is_actor") and element is not self:
273 message += "$(yel)" + element.get(
275 ) + " is here.$(nrm)$(eol)"
276 elif element is not self:
277 message += "$(grn)" + element.get(
283 """Map the portal directions for an area to neighbors."""
285 if re.match(r"""^area\.-?\d+,-?\d+,-?\d+$""", self.key):
286 coordinates = [(int(x))
287 for x in self.key.split(".")[-1].split(",")]
290 self.universe.contents["mudpy.movement.%s" % x].get("vector")
291 ) for x in self.universe.directions)
292 for portal in self.get("gridlinks"):
293 adjacent = map(lambda c, o: c + o,
294 coordinates, offsets[portal])
295 neighbor = "area." + ",".join(
296 [(str(x)) for x in adjacent]
298 if neighbor in self.universe.contents:
299 portals[portal] = neighbor
300 for facet in self.facets():
301 if facet.startswith("link_"):
302 neighbor = self.get(facet)
303 if neighbor in self.universe.contents:
304 portal = facet.split("_")[1]
305 portals[portal] = neighbor
308 def link_neighbor(self, direction):
309 """Return the element linked in a given direction."""
310 portals = self.portals()
311 if direction in portals:
312 return portals[direction]
314 def echo_to_location(self, message):
315 """Show a message to other elements in the current location."""
316 for element in self.universe.contents[
319 if element is not self:
320 element.send(message)
327 def __init__(self, filename="", load=False):
328 """Initialize the universe."""
331 self.directions = set()
335 self.reload_flag = False
336 self.setup_loglines = []
337 self.startdir = os.getcwd()
338 self.terminate_flag = False
342 possible_filenames = [
344 "/usr/local/mudpy/etc/mudpy.yaml",
345 "/usr/local/etc/mudpy.yaml",
346 "/etc/mudpy/mudpy.yaml",
349 for filename in possible_filenames:
350 if os.access(filename, os.R_OK):
352 if not os.path.isabs(filename):
353 filename = os.path.join(self.startdir, filename)
354 self.filename = filename
356 # make sure to preserve any accumulated log entries during load
357 self.setup_loglines += self.load()
360 """Load universe data from persistent storage."""
362 # while loading, it's safe to update elements from read-only files
365 # it's possible for this to enter before logging configuration is read
366 pending_loglines = []
368 # start populating the (re)files dict from the base config
370 mudpy.data.Data(self.filename, self)
372 # load default storage locations for groups
373 if hasattr(self, "contents") and "mudpy.filing" in self.contents:
374 self.origins.update(self.contents["mudpy.filing"].get(
377 # add some builtin groups we know we'll need
378 for group in ("account", "actor", "internal"):
379 self.add_group(group)
381 # make a list of inactive avatars
382 inactive_avatars = []
383 for account in self.groups.get("account", {}).values():
384 for avatar in account.get("avatars"):
386 inactive_avatars.append(self.contents[avatar])
388 pending_loglines.append((
389 'Missing avatar "%s", possible data corruption' %
391 for user in self.userlist:
392 if user.avatar in inactive_avatars:
393 inactive_avatars.remove(user.avatar)
395 # another pass to straighten out all the element contents
396 for element in self.contents.values():
397 element.update_location()
398 element.clean_contents()
400 # done loading, so disallow updating elements from read-only files
403 return pending_loglines
406 """Create a new, empty Universe (the Big Bang)."""
407 new_universe = Universe()
408 for attribute in vars(self).keys():
409 exec("new_universe." + attribute + " = self." + attribute)
410 new_universe.reload_flag = False
415 """Save the universe to persistent storage."""
416 for key in self.files:
417 self.files[key].save()
419 def initialize_server_socket(self):
420 """Create and open the listening socket."""
422 # need to know the local address and port number for the listener
423 host = self.contents["mudpy.network"].get("host")
424 port = self.contents["mudpy.network"].get("port")
426 # if no host was specified, bind to all local addresses (preferring
434 # figure out if this is ipv4 or v6
435 family = socket.getaddrinfo(host, port)[0][0]
436 if family is socket.AF_INET6 and not socket.has_ipv6:
437 log("No support for IPv6 address %s (use IPv4 instead)." % host)
439 # create a new stream-type socket object
440 self.listening_socket = socket.socket(family, socket.SOCK_STREAM)
442 # set the socket options to allow existing open ones to be
443 # reused (fixes a bug where the server can't bind for a minute
444 # when restarting on linux systems)
445 self.listening_socket.setsockopt(
446 socket.SOL_SOCKET, socket.SO_REUSEADDR, 1
449 # bind the socket to to our desired server ipa and port
450 self.listening_socket.bind((host, port))
452 # disable blocking so we can proceed whether or not we can
454 self.listening_socket.setblocking(0)
456 # start listening on the socket
457 self.listening_socket.listen(1)
459 # note that we're now ready for user connections
461 "Listening for Telnet connections on: " +
462 host + ":" + str(port)
466 """Convenience method to get the elapsed time counter."""
467 return self.groups["internal"]["counters"].get("elapsed")
469 def add_group(self, group, fallback=None):
470 """Set up group tracking/metadata."""
471 if group not in self.origins:
472 self.origins[group] = {}
474 fallback = mudpy.data.find_file(
475 ".".join((group, "yaml")), universe=self)
476 if "fallback" not in self.origins[group]:
477 self.origins[group]["fallback"] = fallback
478 flags = self.origins[group].get("flags", None)
479 if fallback not in self.files:
480 mudpy.data.Data(fallback, self, flags=flags)
485 """This is a connected user."""
488 """Default values for the in-memory user variables."""
491 self.authenticated = False
494 self.connection = None
496 self.input_queue = []
497 self.last_address = ""
498 self.last_input = universe.get_time()
499 self.menu_choices = {}
500 self.menu_seen = False
501 self.negotiation_pause = 0
502 self.output_queue = []
503 self.partial_input = b""
504 self.password_tries = 0
505 self.state = "telopt_negotiation"
507 self.universe = universe
510 """Log, close the connection and remove."""
512 name = self.account.get("name", self)
515 log("Logging out %s" % name, 2)
516 self.deactivate_avatar()
517 self.connection.close()
520 def check_idle(self):
521 """Warn or disconnect idle users as appropriate."""
522 idletime = universe.get_time() - self.last_input
523 linkdead_dict = universe.contents[
524 "mudpy.timing.idle.disconnect"].facets()
525 if self.state in linkdead_dict:
526 linkdead_state = self.state
528 linkdead_state = "default"
529 if idletime > linkdead_dict[linkdead_state]:
531 "$(eol)$(red)You've done nothing for far too long... goodbye!"
536 logline = "Disconnecting "
537 if self.account and self.account.get("name"):
538 logline += self.account.get("name")
540 logline += "an unknown user"
541 logline += (" after idling too long in the " + self.state
544 self.state = "disconnecting"
545 self.menu_seen = False
546 idle_dict = universe.contents["mudpy.timing.idle.warn"].facets()
547 if self.state in idle_dict:
548 idle_state = self.state
550 idle_state = "default"
551 if idletime == idle_dict[idle_state]:
553 "$(eol)$(red)If you continue to be unproductive, "
554 + "you'll be shown the door...$(nrm)$(eol)"
558 """Save, load a new user and relocate the connection."""
560 # copy old attributes
561 attributes = self.__dict__
563 # get out of the list
566 # get rid of the old user object
569 # create a new user object
572 # set everything equivalent
573 new_user.__dict__ = attributes
575 # the avatar needs a new owner
577 new_user.account = universe.contents[new_user.account.key]
578 new_user.avatar = universe.contents[new_user.avatar.key]
579 new_user.avatar.owner = new_user
582 universe.userlist.append(new_user)
584 def replace_old_connections(self):
585 """Disconnect active users with the same name."""
587 # the default return value
590 # iterate over each user in the list
591 for old_user in universe.userlist:
593 # the name is the same but it's not us
596 ) and old_user.account and old_user.account.get(
598 ) == self.account.get(
600 ) and old_user is not self:
604 "User " + self.account.get(
606 ) + " reconnected--closing old connection to "
607 + old_user.address + ".",
611 "$(eol)$(red)New connection from " + self.address
612 + ". Terminating old connection...$(nrm)$(eol)",
617 # close the old connection
618 old_user.connection.close()
620 # replace the old connection with this one
622 "$(eol)$(red)Taking over old connection from "
623 + old_user.address + ".$(nrm)"
625 old_user.connection = self.connection
626 old_user.last_address = old_user.address
627 old_user.address = self.address
629 # take this one out of the list and delete
635 # true if an old connection was replaced, false if not
638 def authenticate(self):
639 """Flag the user as authenticated and disconnect duplicates."""
640 if self.state != "authenticated":
641 self.authenticated = True
642 if ("mudpy.limit" in universe.contents and self.account.subkey in
643 universe.contents["mudpy.limit"].get("admins")):
644 self.account.set("administrator", True)
645 log("Administrator %s authenticated." %
646 self.account.get("name"), 2)
648 log("User %s authenticated for account %s." % (
649 self, self.account.subkey), 2)
652 """Send the user their current menu."""
653 if not self.menu_seen:
654 self.menu_choices = get_menu_choices(self)
656 get_menu(self.state, self.error, self.menu_choices),
660 self.menu_seen = True
662 self.adjust_echoing()
665 """"Generate and return an input prompt."""
666 return self.account.get("prompt", ">") + " "
668 def adjust_echoing(self):
669 """Adjust echoing to match state menu requirements."""
670 if mudpy.telnet.is_enabled(self, mudpy.telnet.TELOPT_ECHO,
672 if menu_echo_on(self.state):
673 mudpy.telnet.disable(self, mudpy.telnet.TELOPT_ECHO,
675 elif not menu_echo_on(self.state):
676 mudpy.telnet.enable(self, mudpy.telnet.TELOPT_ECHO,
680 """Remove a user from the list of connected users."""
681 log("Disconnecting account %s." % self, 0)
682 universe.userlist.remove(self)
692 add_terminator=False,
695 """Send arbitrary text to a connected user."""
697 # unless raw mode is on, clean it up all nice and pretty
700 # strip extra $(eol) off if present
701 while output.startswith("$(eol)"):
703 while output.endswith("$(eol)"):
705 extra_lines = output.find("$(eol)$(eol)$(eol)")
706 while extra_lines > -1:
707 output = output[:extra_lines] + output[extra_lines + 6:]
708 extra_lines = output.find("$(eol)$(eol)$(eol)")
710 # start with a newline, append the message, then end
711 # with the optional eol string passed to this function
712 # and the ansi escape to return to normal text
713 if not just_prompt and prepend_padding:
714 if (not self.output_queue or not
715 self.output_queue[-1].endswith(b"\r\n")):
716 output = "$(eol)" + output
717 elif not self.output_queue[-1].endswith(
719 ) and not self.output_queue[-1].endswith(
722 output = "$(eol)" + output
723 output += eol + chr(27) + "[0m"
725 # tack on a prompt if active
726 if self.state == "active":
730 output += self.prompt()
731 mode = self.avatar.get("mode")
733 output += "(" + mode + ") "
735 # find and replace macros in the output
736 output = replace_macros(self, output)
738 # wrap the text at the client's width (min 40, 0 disables)
740 if self.columns < 40:
744 output = wrap_ansi_text(output, wrap)
746 # if supported by the client, encode it utf-8
747 if mudpy.telnet.is_enabled(self, mudpy.telnet.TELOPT_BINARY,
749 encoded_output = output.encode("utf-8")
751 # otherwise just send ascii
753 encoded_output = output.encode("ascii", "replace")
755 # end with a terminator if requested
756 if add_prompt or add_terminator:
757 if mudpy.telnet.is_enabled(
758 self, mudpy.telnet.TELOPT_EOR, mudpy.telnet.US):
759 encoded_output += mudpy.telnet.telnet_proto(
760 mudpy.telnet.IAC, mudpy.telnet.EOR)
761 elif not mudpy.telnet.is_enabled(
762 self, mudpy.telnet.TELOPT_SGA, mudpy.telnet.US):
763 encoded_output += mudpy.telnet.telnet_proto(
764 mudpy.telnet.IAC, mudpy.telnet.GA)
766 # and tack it onto the queue
767 self.output_queue.append(encoded_output)
769 # if this is urgent, flush all pending output
773 # just dump raw bytes as requested
775 self.output_queue.append(output)
779 """All the things to do to the user per increment."""
781 # if the world is terminating, disconnect
782 if universe.terminate_flag:
783 self.state = "disconnecting"
784 self.menu_seen = False
786 # check for an idle connection and act appropriately
790 # if output is paused, decrement the counter
791 if self.state == "telopt_negotiation":
792 if self.negotiation_pause:
793 self.negotiation_pause -= 1
795 self.state = "entering_account_name"
797 # show the user a menu as needed
798 elif not self.state == "active":
801 # flush any pending output in the queue
804 # disconnect users with the appropriate state
805 if self.state == "disconnecting":
808 # check for input and add it to the queue
811 # there is input waiting in the queue
813 handle_user_input(self)
816 """Try to send the last item in the queue and remove it."""
817 if self.output_queue:
819 self.connection.send(self.output_queue[0])
820 except (BrokenPipeError, ConnectionResetError):
821 if self.account and self.account.get("name"):
822 account = self.account.get("name")
824 account = "an unknown user"
825 self.state = "disconnecting"
826 log("Disconnected while sending to %s." % account, 7)
827 del self.output_queue[0]
829 def enqueue_input(self):
830 """Process and enqueue any new input."""
832 # check for some input
834 raw_input = self.connection.recv(1024)
835 except (BlockingIOError, OSError):
841 # tack this on to any previous partial
842 self.partial_input += raw_input
844 # reply to and remove any IAC negotiation codes
845 mudpy.telnet.negotiate_telnet_options(self)
847 # separate multiple input lines
848 new_input_lines = self.partial_input.split(b"\r\0")
849 if len(new_input_lines) == 1:
850 new_input_lines = new_input_lines[0].split(b"\r\n")
852 # if input doesn't end in a newline, replace the
853 # held partial input with the last line of it
855 self.partial_input.endswith(b"\r\0") or
856 self.partial_input.endswith(b"\r\n")):
857 self.partial_input = new_input_lines.pop()
859 # otherwise, chop off the extra null input and reset
860 # the held partial input
862 new_input_lines.pop()
863 self.partial_input = b""
865 # iterate over the remaining lines
866 for line in new_input_lines:
868 # strip off extra whitespace
871 # log non-printable characters remaining
872 if not mudpy.telnet.is_enabled(
873 self, mudpy.telnet.TELOPT_BINARY, mudpy.telnet.HIM):
874 asciiline = bytes([x for x in line if 32 <= x <= 126])
875 if line != asciiline:
876 logline = "Non-ASCII characters from "
877 if self.account and self.account.get("name"):
878 logline += self.account.get("name") + ": "
880 logline += "unknown user: "
881 logline += repr(line)
886 line = line.decode("utf-8")
887 except UnicodeDecodeError:
888 logline = "Non-UTF-8 sequence from "
889 if self.account and self.account.get("name"):
890 logline += self.account.get("name") + ": "
892 logline += "unknown user: "
893 logline += repr(line)
897 line = unicodedata.normalize("NFKC", line)
899 # put on the end of the queue
900 self.input_queue.append(line)
902 def new_avatar(self):
903 """Instantiate a new, unconfigured avatar for this user."""
905 while ("avatar_%s_%s" % (self.account.get("name"), counter)
906 in universe.groups.get("actor", {}).keys()):
908 self.avatar = Element(
909 "actor.avatar_%s_%s" % (self.account.get("name"), counter),
911 self.avatar.append("inherit", "archetype.avatar")
912 self.account.append("avatars", self.avatar.key)
913 log("Created new avatar %s for user %s." % (
914 self.avatar.key, self.account.get("name")), 0)
916 def delete_avatar(self, avatar):
917 """Remove an avatar from the world and from the user's list."""
918 if self.avatar is universe.contents[avatar]:
920 log("Deleting avatar %s for user %s." % (
921 avatar, self.account.get("name")), 0)
922 universe.contents[avatar].destroy()
923 avatars = self.account.get("avatars")
924 avatars.remove(avatar)
925 self.account.set("avatars", avatars)
927 def activate_avatar_by_index(self, index):
928 """Enter the world with a particular indexed avatar."""
929 self.avatar = universe.contents[
930 self.account.get("avatars")[index]]
931 self.avatar.owner = self
932 self.state = "active"
933 log("Activated avatar %s (%s)." % (
934 self.avatar.get("name"), self.avatar.key), 0)
935 self.avatar.go_home()
937 def deactivate_avatar(self):
938 """Have the active avatar leave the world."""
940 log("Deactivating avatar %s (%s) for user %s." % (
941 self.avatar.get("name"), self.avatar.key,
942 self.account.get("name")), 0)
943 current = self.avatar.get("location")
945 self.avatar.set("default_location", current)
946 self.avatar.echo_to_location(
947 "You suddenly wonder where " + self.avatar.get(
951 del universe.contents[current].contents[self.avatar.key]
952 self.avatar.remove_facet("location")
953 self.avatar.owner = None
957 """Destroy the user and associated avatars."""
958 for avatar in self.account.get("avatars"):
959 self.delete_avatar(avatar)
960 log("Destroying account %s for user %s." % (
961 self.account.get("name"), self), 0)
962 self.account.destroy()
964 def list_avatar_names(self):
965 """List names of assigned avatars."""
967 for avatar in self.account.get("avatars"):
969 avatars.append(universe.contents[avatar].get("name"))
971 log('Missing avatar "%s", possible data corruption.' %
976 def broadcast(message, add_prompt=True):
977 """Send a message to all connected users."""
978 for each_user in universe.userlist:
979 each_user.send("$(eol)" + message, add_prompt=add_prompt)
982 def log(message, level=0):
985 # a couple references we need
986 if "mudpy.log" in universe.contents:
987 file_name = universe.contents["mudpy.log"].get("file", "")
988 max_log_lines = universe.contents["mudpy.log"].get("lines", 0)
989 syslog_name = universe.contents["mudpy.log"].get("syslog", "")
994 timestamp = datetime.datetime.now().isoformat(' ')
996 # turn the message into a list of nonempty lines
997 lines = [x for x in [(x.rstrip()) for x in message.split("\n")] if x != ""]
999 # send the timestamp and line to a file
1001 if not os.path.isabs(file_name):
1002 file_name = os.path.join(universe.startdir, file_name)
1003 os.makedirs(os.path.dirname(file_name), exist_ok=True)
1004 file_descriptor = codecs.open(file_name, "a", "utf-8")
1006 file_descriptor.write(timestamp + " " + line + "\n")
1007 file_descriptor.flush()
1008 file_descriptor.close()
1010 # send the timestamp and line to standard output
1011 if ("mudpy.log" in universe.contents and
1012 universe.contents["mudpy.log"].get("stdout")):
1014 print(timestamp + " " + line)
1016 # send the line to the system log
1019 syslog_name.encode("utf-8"),
1021 syslog.LOG_INFO | syslog.LOG_DAEMON
1027 # display to connected administrators
1028 for user in universe.userlist:
1029 if user.state == "active" and user.account.get(
1031 ) and user.account.get("loglevel", 0) <= level:
1032 # iterate over every line in the message
1036 "$(bld)$(red)" + timestamp + " "
1037 + line.replace("$(", "$_(") + "$(nrm)$(eol)")
1038 user.send(full_message, flush=True)
1040 # add to the recent log list
1042 while 0 < len(universe.loglines) >= max_log_lines:
1043 del universe.loglines[0]
1044 universe.loglines.append((level, timestamp + " " + line))
1047 def get_loglines(level, start, stop):
1048 """Return a specific range of loglines filtered by level."""
1050 # filter the log lines
1051 loglines = [x for x in universe.loglines if x[0] >= level]
1053 # we need these in several places
1054 total_count = str(len(universe.loglines))
1055 filtered_count = len(loglines)
1057 # don't proceed if there are no lines
1060 # can't start before the begining or at the end
1061 if start > filtered_count:
1062 start = filtered_count
1066 # can't stop before we start
1073 message = "There are " + str(total_count)
1074 message += " log lines in memory and " + str(filtered_count)
1075 message += " at or above level " + str(level) + "."
1076 message += " The matching lines from " + str(stop) + " to "
1077 message += str(start) + " are:$(eol)$(eol)"
1079 # add the text from the selected lines
1081 range_lines = loglines[-start:-(stop - 1)]
1083 range_lines = loglines[-start:]
1084 for line in range_lines:
1085 message += " (" + str(line[0]) + ") " + line[1].replace(
1089 # there were no lines
1091 message = "None of the " + str(total_count)
1092 message += " lines in memory matches your request."
1098 def glyph_columns(character):
1099 """Convenience function to return the column width of a glyph."""
1100 if unicodedata.east_asian_width(character) in "FW":
1106 def wrap_ansi_text(text, width):
1107 """Wrap text with arbitrary width while ignoring ANSI colors."""
1109 # the current position in the entire text string, including all
1110 # characters, printable or otherwise
1113 # the current text position relative to the begining of the line,
1114 # ignoring color escape sequences
1117 # the absolute and relative positions of the most recent whitespace
1119 last_abs_whitespace = 0
1120 last_rel_whitespace = 0
1122 # whether the current character is part of a color escape sequence
1125 # normalize any potentially composited unicode before we count it
1126 text = unicodedata.normalize("NFKC", text)
1128 # iterate over each character from the begining of the text
1129 for each_character in text:
1131 # the current character is the escape character
1132 if each_character == "\x1b" and not escape:
1136 # the current character is within an escape sequence
1139 if each_character == "m":
1140 # the current character is m, which terminates the
1144 # the current character is a space
1145 elif each_character == " ":
1146 last_abs_whitespace = abs_pos
1147 last_rel_whitespace = rel_pos
1149 # the current character is a newline, so reset the relative
1150 # position too (start a new line)
1151 elif each_character == "\n":
1153 last_abs_whitespace = abs_pos
1154 last_rel_whitespace = rel_pos
1156 # the current character meets the requested maximum line width, so we
1157 # need to wrap unless the current word is wider than the terminal (in
1158 # which case we let it do the wrapping instead)
1159 if last_rel_whitespace != 0 and (rel_pos > width or (
1160 rel_pos > width - 1 and glyph_columns(each_character) == 2)):
1162 # insert an eol in place of the last space
1163 text = (text[:last_abs_whitespace] + "\r\n" +
1164 text[last_abs_whitespace + 1:])
1166 # increase the absolute position because an eol is two
1167 # characters but the space it replaced was only one
1170 # now we're at the begining of a new line, plus the
1171 # number of characters wrapped from the previous line
1172 rel_pos -= last_rel_whitespace
1173 last_rel_whitespace = 0
1175 # as long as the character is not a carriage return and the
1176 # other above conditions haven't been met, count it as a
1177 # printable character
1178 elif each_character != "\r":
1179 rel_pos += glyph_columns(each_character)
1180 if each_character in (" ", "\n"):
1181 last_abs_whitespace = abs_pos
1182 last_rel_whitespace = rel_pos
1184 # increase the absolute position for every character
1187 # return the newly-wrapped text
1191 def weighted_choice(data):
1192 """Takes a dict weighted by value and returns a random key."""
1194 # this will hold our expanded list of keys from the data
1197 # create the expanded list of keys
1198 for key in data.keys():
1199 for _count in range(data[key]):
1200 expanded.append(key)
1202 # return one at random
1203 return random.choice(expanded)
1207 """Returns a random character name."""
1209 # the vowels and consonants needed to create romaji syllables
1238 # this dict will hold our weighted list of syllables
1241 # generate the list with an even weighting
1242 for consonant in consonants:
1243 for vowel in vowels:
1244 syllables[consonant + vowel] = 1
1246 # we'll build the name into this string
1249 # create a name of random length from the syllables
1250 for _syllable in range(random.randrange(2, 6)):
1251 name += weighted_choice(syllables)
1253 # strip any leading quotemark, capitalize and return the name
1254 return name.strip("'").capitalize()
1257 def replace_macros(user, text, is_input=False):
1258 """Replaces macros in text output."""
1260 # third person pronouns
1262 "female": {"obj": "her", "pos": "hers", "sub": "she"},
1263 "male": {"obj": "him", "pos": "his", "sub": "he"},
1264 "neuter": {"obj": "it", "pos": "its", "sub": "it"}
1267 # a dict of replacement macros
1270 "bld": chr(27) + "[1m",
1271 "nrm": chr(27) + "[0m",
1272 "blk": chr(27) + "[30m",
1273 "blu": chr(27) + "[34m",
1274 "cyn": chr(27) + "[36m",
1275 "grn": chr(27) + "[32m",
1276 "mgt": chr(27) + "[35m",
1277 "red": chr(27) + "[31m",
1278 "yel": chr(27) + "[33m",
1281 # add dynamic macros where possible
1283 account_name = user.account.get("name")
1285 macros["account"] = account_name
1287 avatar_gender = user.avatar.get("gender")
1289 macros["tpop"] = pronouns[avatar_gender]["obj"]
1290 macros["tppp"] = pronouns[avatar_gender]["pos"]
1291 macros["tpsp"] = pronouns[avatar_gender]["sub"]
1296 # find and replace per the macros dict
1297 macro_start = text.find("$(")
1298 if macro_start == -1:
1300 macro_end = text.find(")", macro_start) + 1
1301 macro = text[macro_start + 2:macro_end - 1]
1302 if macro in macros.keys():
1303 replacement = macros[macro]
1305 # this is how we handle local file inclusion (dangerous!)
1306 elif macro.startswith("inc:"):
1307 incfile = mudpy.data.find_file(macro[4:], universe=universe)
1308 if os.path.exists(incfile):
1309 incfd = codecs.open(incfile, "r", "utf-8")
1312 if line.endswith("\n") and not line.endswith("\r\n"):
1313 line = line.replace("\n", "\r\n")
1315 # lose the trailing eol
1316 replacement = replacement[:-2]
1319 log("Couldn't read included " + incfile + " file.", 7)
1321 # if we get here, log and replace it with null
1325 log("Unexpected replacement macro " +
1326 macro + " encountered.", 6)
1328 # and now we act on the replacement
1329 text = text.replace("$(" + macro + ")", replacement)
1331 # replace the look-like-a-macro sequence
1332 text = text.replace("$_(", "$(")
1337 def escape_macros(value):
1338 """Escapes replacement macros in text."""
1339 if type(value) is str:
1340 return value.replace("$(", "$_(")
1345 def first_word(text, separator=" "):
1346 """Returns a tuple of the first word and the rest."""
1348 if text.find(separator) > 0:
1349 return text.split(separator, 1)
1357 """The things which should happen on each pulse, aside from reloads."""
1359 # open the listening socket if it hasn't been already
1360 if not hasattr(universe, "listening_socket"):
1361 universe.initialize_server_socket()
1363 # assign a user if a new connection is waiting
1364 user = check_for_connection(universe.listening_socket)
1366 universe.userlist.append(user)
1368 # iterate over the connected users
1369 for user in universe.userlist:
1372 # add an element for counters if it doesn't exist
1373 if "counters" not in universe.groups.get("internal", {}):
1374 Element("internal.counters", universe)
1376 # update the log every now and then
1377 if not universe.groups["internal"]["counters"].get("mark"):
1378 log(str(len(universe.userlist)) + " connection(s)")
1379 universe.groups["internal"]["counters"].set(
1380 "mark", universe.contents["mudpy.timing"].get("status")
1383 universe.groups["internal"]["counters"].set(
1384 "mark", universe.groups["internal"]["counters"].get(
1389 # periodically save everything
1390 if not universe.groups["internal"]["counters"].get("save"):
1392 universe.groups["internal"]["counters"].set(
1393 "save", universe.contents["mudpy.timing"].get("save")
1396 universe.groups["internal"]["counters"].set(
1397 "save", universe.groups["internal"]["counters"].get(
1402 # pause for a configurable amount of time (decimal seconds)
1403 time.sleep(universe.contents["mudpy.timing"].get("increment"))
1405 # increase the elapsed increment counter
1406 universe.groups["internal"]["counters"].set(
1407 "elapsed", universe.groups["internal"]["counters"].get(
1414 """Reload all relevant objects."""
1416 old_userlist = universe.userlist[:]
1417 for element in list(universe.contents.values()):
1420 for user in old_userlist:
1424 def check_for_connection(listening_socket):
1425 """Check for a waiting connection and return a new user object."""
1427 # try to accept a new connection
1429 connection, address = listening_socket.accept()
1430 except BlockingIOError:
1433 # note that we got one
1434 log("New connection from %s." % address[0], 2)
1436 # disable blocking so we can proceed whether or not we can send/receive
1437 connection.setblocking(0)
1439 # create a new user object
1441 log("Instantiated %s for %s." % (user, address[0]), 0)
1443 # associate this connection with it
1444 user.connection = connection
1446 # set the user's ipa from the connection's ipa
1447 user.address = address[0]
1449 # let the client know we WILL EOR (RFC 885)
1450 mudpy.telnet.enable(user, mudpy.telnet.TELOPT_EOR, mudpy.telnet.US)
1451 user.negotiation_pause = 2
1453 # return the new user object
1457 def get_menu(state, error=None, choices=None):
1458 """Show the correct menu text to a user."""
1460 # make sure we don't reuse a mutable sequence by default
1464 # get the description or error text
1465 message = get_menu_description(state, error)
1467 # get menu choices for the current state
1468 message += get_formatted_menu_choices(state, choices)
1470 # try to get a prompt, if it was defined
1471 message += get_menu_prompt(state)
1473 # throw in the default choice, if it exists
1474 message += get_formatted_default_menu_choice(state)
1476 # display a message indicating if echo is off
1477 message += get_echo_message(state)
1479 # return the assembly of various strings defined above
1483 def menu_echo_on(state):
1484 """True if echo is on, false if it is off."""
1485 return universe.groups["menu"][state].get("echo", True)
1488 def get_echo_message(state):
1489 """Return a message indicating that echo is off."""
1490 if menu_echo_on(state):
1493 return "(won't echo) "
1496 def get_default_menu_choice(state):
1497 """Return the default choice for a menu."""
1498 return universe.groups["menu"][state].get("default")
1501 def get_formatted_default_menu_choice(state):
1502 """Default menu choice foratted for inclusion in a prompt string."""
1503 default_choice = get_default_menu_choice(state)
1505 return "[$(red)" + default_choice + "$(nrm)] "
1510 def get_menu_description(state, error):
1511 """Get the description or error text."""
1513 # an error condition was raised by the handler
1516 # try to get an error message matching the condition
1518 description = universe.groups[
1519 "menu"][state].get("error_" + error)
1521 description = "That is not a valid choice..."
1522 description = "$(red)" + description + "$(nrm)"
1524 # there was no error condition
1527 # try to get a menu description for the current state
1528 description = universe.groups["menu"][state].get("description")
1530 # return the description or error message
1532 description += "$(eol)$(eol)"
1536 def get_menu_prompt(state):
1537 """Try to get a prompt, if it was defined."""
1538 prompt = universe.groups["menu"][state].get("prompt")
1544 def get_menu_choices(user):
1545 """Return a dict of choice:meaning."""
1546 menu = universe.groups["menu"][user.state]
1547 create_choices = menu.get("create")
1549 choices = eval(create_choices)
1555 for facet in menu.facets():
1556 if facet.startswith("demand_") and not eval(
1557 universe.groups["menu"][user.state].get(facet)
1559 ignores.append(facet.split("_", 2)[1])
1560 elif facet.startswith("create_"):
1561 creates[facet] = facet.split("_", 2)[1]
1562 elif facet.startswith("choice_"):
1563 options[facet] = facet.split("_", 2)[1]
1564 for facet in creates.keys():
1565 if not creates[facet] in ignores:
1566 choices[creates[facet]] = eval(menu.get(facet))
1567 for facet in options.keys():
1568 if not options[facet] in ignores:
1569 choices[options[facet]] = menu.get(facet)
1573 def get_formatted_menu_choices(state, choices):
1574 """Returns a formatted string of menu choices."""
1576 choice_keys = list(choices.keys())
1578 for choice in choice_keys:
1579 choice_output += " [$(red)" + choice + "$(nrm)] " + choices[
1583 choice_output += "$(eol)"
1584 return choice_output
1587 def get_menu_branches(state):
1588 """Return a dict of choice:branch."""
1590 for facet in universe.groups["menu"][state].facets():
1591 if facet.startswith("branch_"):
1593 facet.split("_", 2)[1]
1594 ] = universe.groups["menu"][state].get(facet)
1598 def get_default_branch(state):
1599 """Return the default branch."""
1600 return universe.groups["menu"][state].get("branch")
1603 def get_choice_branch(user, choice):
1604 """Returns the new state matching the given choice."""
1605 branches = get_menu_branches(user.state)
1606 if choice in branches.keys():
1607 return branches[choice]
1608 elif choice in user.menu_choices.keys():
1609 return get_default_branch(user.state)
1614 def get_menu_actions(state):
1615 """Return a dict of choice:branch."""
1617 for facet in universe.groups["menu"][state].facets():
1618 if facet.startswith("action_"):
1620 facet.split("_", 2)[1]
1621 ] = universe.groups["menu"][state].get(facet)
1625 def get_default_action(state):
1626 """Return the default action."""
1627 return universe.groups["menu"][state].get("action")
1630 def get_choice_action(user, choice):
1631 """Run any indicated script for the given choice."""
1632 actions = get_menu_actions(user.state)
1633 if choice in actions.keys():
1634 return actions[choice]
1635 elif choice in user.menu_choices.keys():
1636 return get_default_action(user.state)
1641 def handle_user_input(user):
1642 """The main handler, branches to a state-specific handler."""
1644 # if the user's client echo is off, send a blank line for aesthetics
1645 if mudpy.telnet.is_enabled(user, mudpy.telnet.TELOPT_ECHO,
1647 user.send("", add_prompt=False, prepend_padding=False)
1649 # check to make sure the state is expected, then call that handler
1650 if "handler_" + user.state in globals():
1651 exec("handler_" + user.state + "(user)")
1653 generic_menu_handler(user)
1655 # since we got input, flag that the menu/prompt needs to be redisplayed
1656 user.menu_seen = False
1658 # update the last_input timestamp while we're at it
1659 user.last_input = universe.get_time()
1662 def generic_menu_handler(user):
1663 """A generic menu choice handler."""
1665 # get a lower-case representation of the next line of input
1666 if user.input_queue:
1667 choice = user.input_queue.pop(0)
1669 choice = choice.lower()
1673 choice = get_default_menu_choice(user.state)
1674 if choice in user.menu_choices:
1675 exec(get_choice_action(user, choice))
1676 new_state = get_choice_branch(user, choice)
1678 user.state = new_state
1680 user.error = "default"
1683 def handler_entering_account_name(user):
1684 """Handle the login account name."""
1686 # get the next waiting line of input
1687 input_data = user.input_queue.pop(0)
1689 # did the user enter anything?
1692 # keep only the first word and convert to lower-case
1693 name = input_data.lower()
1695 # fail if there are non-alphanumeric characters
1696 if name != "".join(filter(
1697 lambda x: x >= "0" and x <= "9" or x >= "a" and x <= "z",
1699 user.error = "bad_name"
1701 # if that account exists, time to request a password
1702 elif name in universe.groups.get("account", {}):
1703 user.account = universe.groups["account"][name]
1704 user.state = "checking_password"
1706 # otherwise, this could be a brand new user
1708 user.account = Element("account.%s" % name, universe)
1709 user.account.set("name", name)
1710 log("New user: " + name, 2)
1711 user.state = "checking_new_account_name"
1713 # if the user entered nothing for a name, then buhbye
1715 user.state = "disconnecting"
1718 def handler_checking_password(user):
1719 """Handle the login account password."""
1721 # get the next waiting line of input
1722 input_data = user.input_queue.pop(0)
1724 if "mudpy.limit" in universe.contents:
1725 max_password_tries = universe.contents["mudpy.limit"].get(
1726 "password_tries", 3)
1728 max_password_tries = 3
1730 # does the hashed input equal the stored hash?
1731 if mudpy.password.verify(input_data, user.account.get("passhash")):
1733 # if so, set the username and load from cold storage
1734 if not user.replace_old_connections():
1736 user.state = "main_utility"
1738 # if at first your hashes don't match, try, try again
1739 elif user.password_tries < max_password_tries - 1:
1740 user.password_tries += 1
1741 user.error = "incorrect"
1743 # we've exceeded the maximum number of password failures, so disconnect
1746 "$(eol)$(red)Too many failed password attempts...$(nrm)$(eol)"
1748 user.state = "disconnecting"
1751 def handler_entering_new_password(user):
1752 """Handle a new password entry."""
1754 # get the next waiting line of input
1755 input_data = user.input_queue.pop(0)
1757 if "mudpy.limit" in universe.contents:
1758 max_password_tries = universe.contents["mudpy.limit"].get(
1759 "password_tries", 3)
1761 max_password_tries = 3
1763 # make sure the password is strong--at least one upper, one lower and
1764 # one digit, seven or more characters in length
1765 if len(input_data) > 6 and len(
1766 list(filter(lambda x: x >= "0" and x <= "9", input_data))
1768 list(filter(lambda x: x >= "A" and x <= "Z", input_data))
1770 list(filter(lambda x: x >= "a" and x <= "z", input_data))
1773 # hash and store it, then move on to verification
1774 user.account.set("passhash", mudpy.password.create(input_data))
1775 user.state = "verifying_new_password"
1777 # the password was weak, try again if you haven't tried too many times
1778 elif user.password_tries < max_password_tries - 1:
1779 user.password_tries += 1
1782 # too many tries, so adios
1785 "$(eol)$(red)Too many failed password attempts...$(nrm)$(eol)"
1787 user.account.destroy()
1788 user.state = "disconnecting"
1791 def handler_verifying_new_password(user):
1792 """Handle the re-entered new password for verification."""
1794 # get the next waiting line of input
1795 input_data = user.input_queue.pop(0)
1797 if "mudpy.limit" in universe.contents:
1798 max_password_tries = universe.contents["mudpy.limit"].get(
1799 "password_tries", 3)
1801 max_password_tries = 3
1803 # hash the input and match it to storage
1804 if mudpy.password.verify(input_data, user.account.get("passhash")):
1807 # the hashes matched, so go active
1808 if not user.replace_old_connections():
1809 user.state = "main_utility"
1811 # go back to entering the new password as long as you haven't tried
1813 elif user.password_tries < max_password_tries - 1:
1814 user.password_tries += 1
1815 user.error = "differs"
1816 user.state = "entering_new_password"
1818 # otherwise, sayonara
1821 "$(eol)$(red)Too many failed password attempts...$(nrm)$(eol)"
1823 user.account.destroy()
1824 user.state = "disconnecting"
1827 def handler_active(user):
1828 """Handle input for active users."""
1830 # get the next waiting line of input
1831 input_data = user.input_queue.pop(0)
1836 # split out the command and parameters
1838 mode = actor.get("mode")
1839 if mode and input_data.startswith("!"):
1840 command_name, parameters = first_word(input_data[1:])
1841 elif mode == "chat":
1842 command_name = "say"
1843 parameters = input_data
1845 command_name, parameters = first_word(input_data)
1847 # lowercase the command
1848 command_name = command_name.lower()
1850 # the command matches a command word for which we have data
1851 if command_name in universe.groups["command"]:
1852 command = universe.groups["command"][command_name]
1856 # if it's allowed, do it
1857 if actor.can_run(command):
1858 exec(command.get("action"))
1860 # otherwise, give an error
1862 mudpy.command.error(actor, input_data)
1864 # if no input, just idle back with a prompt
1866 user.send("", just_prompt=True)
1869 def daemonize(universe):
1870 """Fork and disassociate from everything."""
1872 # only if this is what we're configured to do
1873 if "mudpy.process" in universe.contents and universe.contents[
1874 "mudpy.process"].get("daemon"):
1876 # log before we start forking around, so the terminal gets the message
1877 log("Disassociating from the controlling terminal.")
1879 # fork off and die, so we free up the controlling terminal
1883 # switch to a new process group
1886 # fork some more, this time to free us from the old process group
1890 # reset the working directory so we don't needlessly tie up mounts
1893 # clear the file creation mask so we can bend it to our will later
1896 # redirect stdin/stdout/stderr and close off their former descriptors
1897 for stdpipe in range(3):
1899 sys.stdin = codecs.open("/dev/null", "r", "utf-8")
1900 sys.__stdin__ = codecs.open("/dev/null", "r", "utf-8")
1901 sys.stdout = codecs.open("/dev/null", "w", "utf-8")
1902 sys.stderr = codecs.open("/dev/null", "w", "utf-8")
1903 sys.__stdout__ = codecs.open("/dev/null", "w", "utf-8")
1904 sys.__stderr__ = codecs.open("/dev/null", "w", "utf-8")
1907 def create_pidfile(universe):
1908 """Write a file containing the current process ID."""
1909 pid = str(os.getpid())
1910 log("Process ID: " + pid)
1911 if "mudpy.process" in universe.contents:
1912 file_name = universe.contents["mudpy.process"].get("pidfile", "")
1916 if not os.path.isabs(file_name):
1917 file_name = os.path.join(universe.startdir, file_name)
1918 os.makedirs(os.path.dirname(file_name), exist_ok=True)
1919 file_descriptor = codecs.open(file_name, "w", "utf-8")
1920 file_descriptor.write(pid + "\n")
1921 file_descriptor.flush()
1922 file_descriptor.close()
1925 def remove_pidfile(universe):
1926 """Remove the file containing the current process ID."""
1927 if "mudpy.process" in universe.contents:
1928 file_name = universe.contents["mudpy.process"].get("pidfile", "")
1932 if not os.path.isabs(file_name):
1933 file_name = os.path.join(universe.startdir, file_name)
1934 if os.access(file_name, os.W_OK):
1935 os.remove(file_name)
1938 def excepthook(excepttype, value, tracebackdata):
1939 """Handle uncaught exceptions."""
1941 # assemble the list of errors into a single string
1943 traceback.format_exception(excepttype, value, tracebackdata)
1946 # try to log it, if possible
1949 except Exception as e:
1950 # try to write it to stderr, if possible
1951 sys.stderr.write(message + "\nException while logging...\n%s" % e)
1954 def sighook(what, where):
1955 """Handle external signals."""
1958 message = "Caught signal: "
1960 # for a hangup signal
1961 if what == signal.SIGHUP:
1962 message += "hangup (reloading)"
1963 universe.reload_flag = True
1965 # for a terminate signal
1966 elif what == signal.SIGTERM:
1967 message += "terminate (halting)"
1968 universe.terminate_flag = True
1970 # catchall for unexpected signals
1972 message += str(what) + " (unhandled)"
1978 def override_excepthook():
1979 """Redefine sys.excepthook with our own."""
1980 sys.excepthook = excepthook
1983 def assign_sighook():
1984 """Assign a customized handler for some signals."""
1985 signal.signal(signal.SIGHUP, sighook)
1986 signal.signal(signal.SIGTERM, sighook)
1990 """This contains functions to be performed when starting the engine."""
1992 # see if a configuration file was specified
1993 if len(sys.argv) > 1:
1994 conffile = sys.argv[1]
2000 universe = Universe(conffile, True)
2002 # report any loglines which accumulated during setup
2003 for logline in universe.setup_loglines:
2005 universe.setup_loglines = []
2007 # fork and disassociate
2010 # override the default exception handler so we get logging first thing
2011 override_excepthook()
2013 # set up custom signal handlers
2017 create_pidfile(universe)
2019 # load and store diagnostic info
2020 universe.versions = mudpy.version.Versions("mudpy")
2022 # log startup diagnostic messages
2023 log("On %s at %s" % (universe.versions.python_version, sys.executable), 1)
2024 log("Import path: %s" % ", ".join(sys.path), 1)
2025 log("Installed dependencies: %s" % universe.versions.dependencies_text, 1)
2026 log("Other python packages: %s" % universe.versions.environment_text, 1)
2027 log("Started %s with command line: %s" % (
2028 universe.versions.version, " ".join(sys.argv)), 1)
2030 # pass the initialized universe back
2035 """These are functions performed when shutting down the engine."""
2037 # the loop has terminated, so save persistent data
2040 # log a final message
2041 log("Shutting down now.")
2043 # get rid of the pidfile
2044 remove_pidfile(universe)