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Programming
Two player game, forking & sockets
Post 302528146 by Corona688 on Monday 6th of June 2011 01:21:37 PM
06-06-2011
Quote:
Hi.
I am just making first steps in Linux POSIX programming. I have read some tutorials on processes, signals and sockets (thanks Beej!), so some basic knowledge I have already got.
I want to write some very basic game server. My idea is to have main process, which is waiting for new players. If there are at least two clients connected, spawn one process per every player and then start doing some actions (not relevant now). Players (separate processes) would communicate in pairs through hm... I don't know yet, for sure some IPC structure.
I am just making first steps in Linux POSIX programming. I have read some tutorials on processes, signals and sockets (thanks Beej!), so some basic knowledge I have already got.
I want to write some very basic game server. My idea is to have main process, which is waiting for new players. If there are at least two clients connected, spawn one process per every player and then start doing some actions (not relevant now). Players (separate processes) would communicate in pairs through hm... I don't know yet, for sure some IPC structure.
Quote:
According to this very general approach (I am just beginner 
) I have few questions:
1. How to provide proper waiting for players, for example when there is no clients at all or there is only one and waits for opponent?
) I have few questions:1. How to provide proper waiting for players, for example when there is no clients at all or there is only one and waits for opponent?
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2. How to handle three way inter-process communication? I mean between main process, player1 process, player3 process. I am guessing I would have to use some semaphores.
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3. How to handle such communication, when the main process has to gather some information about paired clients moves and waiting for new clients at the same time? Can it be done in one, main process?
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4. Could you explain me some basic algorithm how such program should be properly constructed? Some skeleton, names of functions, which manuals I have to study and general hints in order not to make steps blindly.
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LEARN ABOUT DEBIAN
dbus-cleanup-sockets
dbus-cleanup-sockets(1) General Commands Manual dbus-cleanup-sockets(1) NAME
dbus-cleanup-sockets - clean up leftover sockets in a directory SYNOPSIS
dbus-cleanup-sockets [DIRECTORY] DESCRIPTION
The dbus-cleanup-sockets command cleans up unused D-Bus connection sockets. See http://www.freedesktop.org/software/dbus/ for more informa- tion about the big picture. If given no arguments, dbus-cleanup-sockets cleans up sockets in the standard default socket directory for the per-user-login-session mes- sage bus; this is usually /tmp. Optionally, you can pass a different directory on the command line. On Linux, this program is essentially useless, because D-Bus defaults to using "abstract sockets" that exist only in memory and don't have a corresponding file in /tmp. On most other flavors of UNIX, it's possible for the socket files to leak when programs using D-Bus exit abnormally or without closing their D-Bus connections. Thus, it might be interesting to run dbus-cleanup-sockets in a cron job to mop up any leaked sockets. Or you can just ignore the leaked sockets, they aren't really hurting anything, other than cluttering the output of "ls /tmp" AUTHOR
dbus-cleanup-sockets was adapted by Havoc Pennington from linc-cleanup-sockets written by Michael Meeks. BUGS
Please send bug reports to the D-Bus mailing list or bug tracker, see http://www.freedesktop.org/software/dbus/ dbus-cleanup-sockets(1)