2003-11-08 16:48:03 +00:00
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2001-11-12 21:42:17 +00:00
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2003-11-08 18:49:36 +00:00
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2003-11-08 16:48:03 +00:00
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2003-11-08 20:15:31 +00:00
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<META name="author" lang="en" content="Michiel Broek">
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2001-11-12 21:42:17 +00:00
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<META name="copyright" lang="en" content="Copyright Michiel Broek">
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<META name="description" lang="en" content="MBSE BBS Manual">
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<META name="keywords" lang="en" content="MBSE BBS, MBSE, BBS, manual, fido, fidonet, gateway, tosser, mail, tic, mailer">
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<TITLE>MBSE BBS Programs - mbtask - MBSE BBS Taskmanager.</TITLE>
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<BLOCKQUOTE>
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2004-09-09 19:02:43 +00:00
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<div align="right"><h5>Last update 09-Sep-2004</h5></div>
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2003-11-08 16:48:03 +00:00
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<div align="center"><H1>mbtask - MBSE BBS Taskmanager</H1></div>
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2001-11-12 21:42:17 +00:00
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<H3>Sysopsis.</H3>
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<P>
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2003-12-06 16:35:33 +00:00
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<code><strong>mbtask</strong> [-nd]</code>
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2001-11-12 21:42:17 +00:00
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<P> <P>
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<H3>Description.</H3>
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<P>
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<strong>mbtask</strong> is the taskmanager for the whole MBSE BBS system.
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This deamon keeps track of all client actions,
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does the logging for the clients, does database locking, authorizes clients,
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set/resets users "do not disturb flags", sends and receives chat messages,
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2001-12-29 15:17:18 +00:00
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keeps track of Zone Mail Hour, the status of the mail and files in the outbound,
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and the BBS open/close status.
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Communication between <strong>mbsed</strong> and the client programs is done via Unix
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2001-11-12 21:42:17 +00:00
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Datagram sockets. The protocol used to communicate between <strong>mbtask</strong>
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and the clients is explained later.
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This daemon also watches the semafore directory for some special files.
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It also starts programs when they are needed.
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The very first time <b>mbtask</b> is started it creates a default config.data and task.data,
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2001-12-29 15:17:18 +00:00
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the main configuration and task configuration files.
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Then it calls <b>mbsetup init</b> to build the default databases.
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2001-11-12 21:42:17 +00:00
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<b>mbtask</b> should be started at system boot so the bbs system will start working.
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The init script that is installed on your system will do that.
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<P>
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After startup and initalization <b>mbtask</b> runs internally once per second forever.
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If there is nothing to do then this time will slowly increase upto 5 seconds. This time will be reset
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to one second as soon as there is work to be done. The actual work is to check a number of external and
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internal semafore's and act on these.
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But before any program is started a number of things are checked:
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<OL>
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<LI>Check the system's load average. If it is too busy the processing of background
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tasks is suspended until your system load drops.
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The default setup is set at 1.50 but you can change that with mbsetup. Experience
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will learn what the best value will be and I need some feedback on that.<br>
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<LI>The UPS semafore <b>upsalarm</b> will be checked. This means that the system is running on
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battery power and no new jobs are started.
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<LI>The UPS semafore <b>upsdown</b> will be checked. This is the fatal one, if
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this one exists <b>mbtask</b> will try to stop all current running jobs.
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If there are no jobs left running then <b>mbtask</b> will stop itself.
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The upsdown semafore means that the system
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will shutdown and power off, that's why it's fatal and there is no way back.<br>
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<LI>The status of the bbs will be checked, is it open or closed. If it is closed, no
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jobs will be started.
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2001-12-29 15:17:18 +00:00
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<LI>The Zone Mail Hour is checked. If ZMH begins the semafore's <b>zmh</b> is
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created.
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If ZMH ends the semafore <b>zmh</b> is removed.
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<LI>Each twenty seconds a ping is send to the IP addresses defined with <b>mbsetup</b> to
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check if the internet can be reached. If both ping addresses fail, it is assumed that
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2001-12-29 15:17:18 +00:00
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the internet can't be reached. After a status change, the outbound will be
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scanned.
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<LI>Scan the mailer outbound for work. This builds a list of nodes with mail
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in the outbound and sets the necessary flags on nodes who may be called.
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2002-03-23 13:30:50 +00:00
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If a node needs to be called, <b>mbtask</b> will spawn <b>mbcico</b> to
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call this node. The number of free modem and ISDN ports and the maximum
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number of TCP/IP sessions and already registered sessions, determine
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howmany sessions will be started. The sessions will be started at
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intervals of 20 seconds.
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2001-12-29 15:17:18 +00:00
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It will also set a time when something will change for a node, ie. a zone
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mail hour is reached, or a mail window for a node with Txx flags is
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reached. Internally this scheduler runs at the UTC clock because Fidonet
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has all times defined in UTC.
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2001-11-12 21:42:17 +00:00
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</OL>
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Each new minute the timestamp of semafore <b>mbtask.last</b> is updated so that you can check that
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<b>mbtask</b> is running. Also each minute is checked if the system configuration files are
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changed, is so they are reloaded. There is no need to stop and start <b>mbtask</b> if you made
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changes to the system configuration.
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Then all kind of internal semafore's will be checked. The commands that are executed have default
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values, but they can be changed wit mbsetup. The commands can be scripts as well.
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The checks and actions are:
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<P>
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2003-11-08 20:15:31 +00:00
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<table border=1 bgcolor='#FFFF99' cellspacing=0 cellpadding=3>
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2001-11-12 21:42:17 +00:00
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<tr>
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2003-11-08 20:15:31 +00:00
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<th align=left bgcolor='#000080'><font color='#FFFFFF'>Semafore</font></th>
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<th align=left bgcolor='#000080'><font color='#FFFFFF'>Speed</font></th>
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<th align=left bgcolor='#000080'><font color='#FFFFFF'>Tasktype</font></th>
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<th align=left bgcolor='#000080'><font color='#FFFFFF'>Depends on</font></th>
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<th align=left bgcolor='#000080'><font color='#FFFFFF'>Job to run</font></th>
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2001-11-12 21:42:17 +00:00
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</tr>
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<tr><td>mailout</td><td>Fast</td><td>mbfido</td><td>Max. 1 mbfido task</td><td>mbfido scan web -quiet</td></tr>
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<tr><td>mailin</td><td>Fast</td><td>mbfido</td><td>Max. 1 mbfido task</td><td>mbfido tic toss web -quiet</td></tr>
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<tr><td>newnews</td><td>Fast</td><td>mbfido</td><td>Max. 1 mbfido task</td><td>mbfido news web -quiet</td></tr>
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<tr><td>mbindex</td><td>Fast</td><td>mbindex</td><td>No other tasks</td><td>mbindex -quiet and if exist: goldnode</td></tr>
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<tr><td>msglink</td><td>Fast</td><td>mbfido</td><td>No other tasks</td><td>mbmsg link -quiet</td></tr>
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<tr><td>reqindex</td><td>Fast</td><td>mbfile</td><td>No other tasks</td><td>mbfile index -quiet</td></tr>
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<tr><td>scanout</td><td>Slow</td><td>call</td><td>Only 1 call task</td><td>mbcico -r1</td></tr>
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</table>
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<P>
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The Fast and Slow values mean: Fast is each second, Slow is check each 20 seconds.
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As you can see, the system will not do too much at the same time. Jobs like compiling
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new nodelists or create file request indexes have a very low priority. Because this
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daemon checks the semafore's each second it responds much better that the old scripts
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running on the cron daemon. The system will be expanded so that more outgoing calls
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will be done at the same time, ie. ISDN and analogue calls, and if they are present
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internet calls, will be made at the same time.
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<P>
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The <b>mbtask</b> program keeps also track of a unique number generator, this is
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just a simple counter that is increased each time it is asked for a new number.
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It will take years for the numbers to repeat. Even if the status file is lost
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the chance that numbers are repeated on your system are almost zero. The first
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time the counter is initialized it is set to the current unix time in seconds
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since 1 januari 1970. This counter is used by several programs to create unique
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.pkt filenames, msgid numbers etc.
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2003-12-06 16:35:33 +00:00
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<P>
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The commandline option <b>-nd</b> is only for debugging, it allows to start
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without becoming a daemon, <b>mbtask</b> will run in the foreground. This
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option is only usefull for developers.
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2001-11-12 21:42:17 +00:00
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<P> <P>
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<H3>Environment.</H3>
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<P>
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In order to run <strong>mbtask</strong> you must set the global variable
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<strong>$MBSE_ROOT</strong>. This variable must point to the root directory
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of the bbs structure.
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<P> <P>
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<H3>Security.</H3>
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<P>
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2001-12-29 15:17:18 +00:00
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<strong>mbtask</strong> is installed setuid root. This is needed to initialize
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2001-11-12 21:42:17 +00:00
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a raw socket for the ping function. After that is done the privilege drops to
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user <strong>mbse</strong> before the child process is created and the rest
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of the initialisation is done.
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The child process can never get root privileges because it is spawned by user mbse.
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<P> <P>
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<H3>Communications.</H3>
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<P>
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Communication between the server and the clients is established by
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Unix datagram sockets. There can be only 1 server running.
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The server will accept connections from clients on your local machine only.
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The limit for the amount of clients that can connect to the server is set to 100.
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<P>
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The server creates a Unix datagram socket at startup and waits for connections.
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The name of this this socket is /opt/mbse/tmp/mbtask.
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When a client connects it creates a Unix datagram socket in /opt/mbse/tmp, the name is
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the name of the program, added with the pid of the program. So if <b>mbcico</b> is started
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with pid 2312 the socket will be /opt/mbse/tmp/mbcico2312.
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<P>
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All commands are 4 capital letters followed by a colon, a number indicating
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how much data fields will follow. If that number is higher than zero, the
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data fields are seperated with commas. The command is terminated
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with a ; character. Examples are:<br>
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<pre>
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GCLO:0; Zero datafields command.
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DOPE:1,dbname; One datafield command.
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</pre>
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All commands will receive a reply as soon as possible. If a
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resource is temporary not available, a reply will follow too, telling
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this condition. Replies can also contain optional data. Examples:<br>
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<pre>
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100:0; Response 100, no data.
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200:1,Syntax error; One datafield.
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</pre>
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The server has a 10 minute timeout for receiving data when a connection
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is established. The clients need to "ping" the server at regular intervals
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to prevent a disconnect. All official MBSE BBS programs do that. The pid
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send with most commands is the pid of the calling program. Since this number
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is unique, it is used to keep track of the connected clients.
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<P>
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The commands are divided in 26 catagories, most unused at this time.
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<P>
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<pre>
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Catagories:
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Cat. Description
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---- -------------------------------------------
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Axxx Accounting, system monitor info etc.
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Cxxx Chatting
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2004-03-20 13:26:34 +00:00
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Dxxx Disk watch
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Gxxx Global commands.
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Sxxx Status commands.
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Group A, Accounting.
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Command: AINI:5,pid,tty,uid,prg,city; Initialize connection, and who am I.
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2004-09-09 19:02:43 +00:00
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Reply: 100:1,line; Ok, linen is a logical linennumber for the bbs.
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2001-11-12 21:42:17 +00:00
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200:1,Syntax Error; Error.
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Command: ADOI:2,pid,doing; What am I doing right now.
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Reply: 100:0; Ok.
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200:1,Syntax Error; Error.
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Command: ACLO:1,pid; Close my connection.
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Reply: 107:0; Connection closed.
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200:1,Syntax Error; Error, connection is still open.
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Command: ALOG:5,fil,prg,pid,grade,txt; Write a line of text in logfile with grade.
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Reply: 100:0; Ok.
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201:1,errno; Error, number in errno.
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2002-03-23 13:30:50 +00:00
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Command: ATCP:1,pid; Registrate this session as TCP/IP session.
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Reply: 100:0; Ok.
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200:1,Syntax Error; Error.
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2001-11-12 21:42:17 +00:00
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Command: AUSR:3,pid,uid,city; Set username and city
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Reply: 100:0; Ok.
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200:1,Syntax Error; Error.
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Command: ADIS:2,pid,flag; Set Do Not Disturb flag.
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Reply: 100:0; Ok.
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200:1,Syntax Error; Error.
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Command: ATIM:1,time; Set new Client/Server timer in seconds.
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Reply: 100:0; Ok.
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200:1,Syntax Error; Error.
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Command: ADEF:0; Set Client/Server timer to default (10 minutes).
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Reply: 100:0; Ok.
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200:1,Syntax Error; Error.
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Command: ATTY:2,pid,tty; Set new tty name.
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Reply: 100:0; Ok.
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200:1,Syntax Error; Error.
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2004-03-20 13:26:34 +00:00
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Group C, Chatting
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2001-11-12 21:42:17 +00:00
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Command: CIPM:1,pid; Is Personal Message present.
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Reply: 100:2,fromname,message; Yes, from .. with message text.
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100:0; No.
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Command: CSPM:3,fromuser,touser,txt; Send personal message to user.
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Reply: 100:1,n; n: 0=Ok, 1=Do not disturb, 2=Buffer full, 3=Error.
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100:0; Impossible.
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2004-03-20 13:26:34 +00:00
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Command: CSYS:2,pid,1; Sysop available for chat (from mbmon).
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CSYS:2,pid,0; Sysop goes away (from mbmon).
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Reply: 100:0; Always Ok.
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2001-11-12 21:42:17 +00:00
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2004-03-20 13:26:34 +00:00
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Command: CPAG:2,pid,reason; Page sysop for a chat.
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Reply: 100:1,n; 1=busy, 2=sysop not available, 3=error.
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100:0; Ok
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Command: CCAN:1,pid; Cancel sysop page.
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Reply: 100:0; Always Ok.
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Command: CCKP:0; Check sysop page (from mbmon).
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Reply: 100:3,pid,1,reason; Page is active.
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100:3,pid,0,reason; Page is cancelled, user still online.
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100:0; No page active.
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Command: CISC:1,pid; Check sysop in chatmode.
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Reply: 100:1,1; Yes and drop into chatmode.
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100:1,0; No.
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2005-04-20 16:59:32 +00:00
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Command: CCON:4,pid,username,unixname,n; Connect to chatserver with username. n=1 user is sysop.
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2004-03-20 13:26:34 +00:00
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Reply: 100:1,error; Error with message.
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100:0; Ok.
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Command: CCLO:1,pid; Close chat session.
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Reply: 100:1,error; Error.
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100:0; Ok.
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Command: CPUT:2,pid,message; Put message on chatserver.
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Reply: 100:2,0,error; Error, not fatal and continue.
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100:2,1,error; Error, fatal and disconnect chat.
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100:0; Ok.
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Command: CGET:1,pid; Get message from chatserver.
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100:2,0,message; If message present.
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100:2,1,error; Error and disconnect chat.
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100:0; No new message.
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Group D, Disk watch command.
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Command: DRES:0; Reset and reread disk tables.
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Reply: 100:0; Always Ok.
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Command: DSPC:0; Enough free diskspace.
|
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|
|
Reply: 100:1;n; 0=No, 1=Yes, 2=Unknown, 3=Error.
|
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|
Command: DGFS:0; Get filesystem status (see note below).
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100:n,data1, ..., data10; Maximum 10 filesystems datalines.
|
2001-11-12 21:42:17 +00:00
|
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|
2001-12-29 15:17:18 +00:00
|
|
|
Group G, Global commands.
|
2001-11-12 21:42:17 +00:00
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|
Command: GNOP:0; No OPerations.
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|
Reply: 100:0; Ok.
|
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|
Command: GPNG:1,data; Ping, echo data.
|
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Reply: 100:1,data; Ping reply.
|
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Command: GVER:0; Give server version.
|
|
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|
|
Reply: 100:1,Version ....; Version reply.
|
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|
|
Command: GSTA:0; Get complete mbsed status record. (13 fields)
|
2004-03-20 13:26:34 +00:00
|
|
|
Reply: 100:19,start,laststart,daily,startups,clients,tot_clients,tot_peak,syntax_errs,
|
2001-11-12 21:42:17 +00:00
|
|
|
com_errs,today_clients,today_peak,today_syntax,today_comerr,bbsopen,
|
2002-02-02 15:15:34 +00:00
|
|
|
is_zmh,do_inet,processing,system_load,sequence;
|
2001-11-12 21:42:17 +00:00
|
|
|
|
|
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|
|
Command: GMON:1,n; Get registration info line, 1=First, 0=Next line.
|
|
|
|
|
Reply: 100:7,pid,tty,user,program,city,isdoing,starttime;
|
|
|
|
|
100:0; No more lines.
|
|
|
|
|
|
2004-03-20 13:26:34 +00:00
|
|
|
Command: GDST:0; Get filesystem status. Obsolete, use DGFS instead.
|
2001-11-12 21:42:17 +00:00
|
|
|
100:n,data1, ..., data10; Maximum 10 filesystems datalines.
|
|
|
|
|
|
|
|
|
|
Command: GSYS:0; Get bbs statistics.
|
|
|
|
|
100:7,calls,pots_calls,isdn_calls,network_calls,local_calls,startdate,lastcaller;
|
|
|
|
|
|
|
|
|
|
Command: GLCC:0; Get Lastcallers count
|
|
|
|
|
100,1,n; Return counter value.
|
|
|
|
|
|
|
|
|
|
Command: GLCR:1,recno; Get Lastcaller record
|
|
|
|
|
100:9,user,location,level,tty,time,minsmcalls,speed,cations;
|
|
|
|
|
201:1,16; Not available.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Group S, Status commands.
|
|
|
|
|
|
|
|
|
|
Command: SBBS:0; Get BBS Status (open, zmh, shutdown).
|
|
|
|
|
Reply: 100:2,0,The system is open for use;
|
|
|
|
|
100:2,1,The system is closed right now!;
|
|
|
|
|
100:2,2,The system is closed for Zone Mail Hour!;
|
|
|
|
|
|
|
|
|
|
Command: SOPE:0; Open the BBS.
|
|
|
|
|
Reply: 100:0; Ok.
|
|
|
|
|
|
|
|
|
|
Command: SCLO:1,mesage; Close the BBS with reason.
|
|
|
|
|
Reply: 100:0; Ok.
|
|
|
|
|
|
|
|
|
|
Command: SFRE:0; Is the BBS Free.
|
|
|
|
|
Reply: 100:1,Running utilities: n Active users: n;
|
|
|
|
|
100:0; It's free.
|
|
|
|
|
|
|
|
|
|
Command: SSEQ:0; Get next unique sequence number.
|
|
|
|
|
Reply: 100:1,number; Next unique sequence number.
|
|
|
|
|
|
|
|
|
|
Command: SEST:1,semafore; Get status of internal semafore.
|
|
|
|
|
Reply: 100:1,n; 1 = set, 0 = not set.
|
|
|
|
|
200:1,16; Semafore not known.
|
|
|
|
|
|
|
|
|
|
Command: SECR:1,semafore; Set semafore
|
|
|
|
|
Reply: 100:0; Ok.
|
|
|
|
|
200:1,16; Error.
|
|
|
|
|
|
|
|
|
|
Command: SERM:1,semafore; Remove semafore
|
|
|
|
|
Reply: 100:0; Ok (also if there was no semafore).
|
|
|
|
|
200:1,16; Semafore not known.
|
|
|
|
|
</pre>
|
2004-03-20 13:26:34 +00:00
|
|
|
Note: in reply of DGFS the reply is 100:n,size free mountpoint fstype,.....
|
2001-11-12 21:42:17 +00:00
|
|
|
where n = 1 for 1 filesystem, and 10 for a total of 10 filesystems. There
|
|
|
|
|
will never be a reply for more then 10 filesystems. The reported filesystems
|
2004-03-20 13:26:34 +00:00
|
|
|
are collected by a thread process of mbtask that only includes the filesystems
|
|
|
|
|
actually used by mbse.
|
2002-03-23 13:30:50 +00:00
|
|
|
This is used by the <b>mbmon</b> program to get a "live" view of your filesystems.
|
2004-03-20 13:26:34 +00:00
|
|
|
The GSPC command is used by utilities to check if enough space is available to
|
|
|
|
|
continue to work safely.
|
2001-11-12 21:42:17 +00:00
|
|
|
<P> <P>
|
|
|
|
|
|
2003-08-18 11:48:36 +00:00
|
|
|
<A HREF="index.htm"><IMG SRC="../images/larrow.png" ALT="Index" Border="0">Back to index</A>
|
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<A HREF="../index.htm"><IMG SRC="../images/b_arrow.png" ALT="Main" Border="0">Back to Main index</A>
|
2001-11-12 21:42:17 +00:00
|
|
|
</BLOCKQUOTE>
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