Wolfpack Empire - mirror of https://git.pond.sub.org/empserver
http://wolfpackempire.com/
Markus Armbruster
40b11c098c
buy() reads the lot, prompts for input, then writes back the lot, triggering a generation oops. Any updates made by other threads while buy() waits for input are wiped out, triggering a seqno mismatch oops. Since commodities are taken from the seller when he puts them on the market, and given to the buyer when the trade executes, the wiped out lot's seller loses his goods without compensation, the other seller gets to keep his goods, and the buyer receives their duplicates. This can be abused by two conspiring countries to duplicate commodities. The seller puts them on the market (say 100 gold bars). The buyer starts a buy command, and waits at its last prompt for the lot to be replaced. The seller takes them off the market (possible, since there's no bid, yet), and sells something else (say one food) quickly enough to get the same lot number assigned. The buyer then completes the buy command. The seller loses one food, the buyer gains 100 gold bars. Replaces a partial fix from v4.0.1, which only caught lots gone away, not lots replaced by new ones. |
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| doc | ||
| include | ||
| info | ||
| m4 | ||
| man | ||
| scripts | ||
| src | ||
| .gitignore | ||
| bootstrap | ||
| compile | ||
| config.guess | ||
| config.sub | ||
| configure.ac | ||
| COPYING | ||
| CREDITS | ||
| depcomp | ||
| GNUmakefile.in | ||
| INSTALL | ||
| install-sh | ||
| Make.mk | ||
| README | ||
Welcome to Empire 4, code-named Wolfpack.
Empire is a multi-player, client/server Internet based war game.
Copyright (C) 1986-2011, Dave Pare, Jeff Bailey, Thomas Ruschak,
Ken Stevens, Steve McClure, Markus Armbruster
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License (in file
`COPYING'), or (at your option) any later version.
See file `CREDITS' for a list of contributors.
Directory `doc' has additional information. File `doc/README'
describes the files there and what they talk about.
To build the server and set up a game, follow the steps below.
(1) Unpacking the source tree
If you downloaded a tarball, unpack it.
If you cloned a git repository, run bootstrap. This requires
recent versions of Autoconf and Automake to be installed.
(2) Building a server
Prerequisites: IEEE Std 1003.1-2001 (POSIX.1-2001), GNU make, a
curses library, Perl, and either nroff or GNU troff (`groff').
See file `INSTALL' for detailed compilation and installation
instructions. Quick guide for the impatient: run configure; make;
make install. The last step is optional; everything runs fine
right from the build tree.
If make fails without doing anything, you're probably not using
GNU make. Some systems have it installed as `gmake'.
Solaris supports POSIX.1-2001, but you need to set up your
environment for that. Try passing
SHELL=/usr/xpg4/bin/sh PATH=/usr/xpg6/bin:/usr/xpg4/bin:$PATH
to make. See standards(5) for details.
(3) Creating a game
* Create a configuration for your game. make install installs one
in $prefix/etc/empire/econfig ($prefix is /usr/local unless you
chose something else with configure). You can use pconfig to
create another one.
* Edit your configuration file. See doc/econfig for more
information.
Unless you put your configuration file in the default location
(where make install installs it), you have to use -e with all
programs to make them use your configuration.
* Run files to set up your data directory.
* Run fairland to create a world. For a sample world, try
`fairland 10 30'. This creates file ./newcap_script, which will
be used below. You can edit it to change country names and
passwords.
Check out fairland's manual page for more information.
* Start the server. For development, you want to run it with -d
in a debugger, see doc/debugging. Do not use -d for a real
game!
* Log in as deity POGO with password peter. This guide assumes
you use the included client `empire', but other clients should
work as well.
For help, try `info'.
To change the deity password, use `change re <password>'.
* Create countries with `exec newcap_script'.
Your game is now up!
Naturally, there's more to running a real game than that, but that's
beyond the scope of this file.
Please report bugs to <wolfpack@wolfpackempire.com> or via SourceForge
http://sourceforge.net/projects/empserver (registration required).
For more information or help, try rec.games.empire on Usenet, or send
e-mail to <wolfpack@wolfpackempire.com> and we'll try to answer if we
can. Also check out our web site at "http://www.wolfpackempire.com".
Have fun!
Wolfpack!