46 lines
2.4 KiB
HTML
46 lines
2.4 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
|
<HTML>
|
|
<HEAD>
|
|
<META http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
|
|
<META http-equiv="Content-Style-Type" content="text/css">
|
|
<META NAME="Language" content='en'>
|
|
<META name="author" lang="en" content="Michiel Broek">
|
|
<META name="copyright" lang="en" content="Copyright Michiel Broek">
|
|
<META name="description" lang="en" content="MBSE BBS Manual - Using UPS semafore's">
|
|
<META name="keywords" lang="en" content="MBSE BBS, MBSE, BBS, manual, fido, fidonet, gateway, tosser, mail, tic, mailer">
|
|
<TITLE>Using UPS semafore's.</TITLE>
|
|
<LINK rel=stylesheet HREF="manual.css">
|
|
</HEAD>
|
|
<BODY>
|
|
<BLOCKQUOTE>
|
|
<!-- MBSEADVERT -->
|
|
<div align='right'><h5>Last update 08-Jun-2001</h5></div>
|
|
<div align='center'><H1>MBSE BBS - Using UPS semafore's.</H1></div>
|
|
|
|
If you have a UPS and you are able to let your UPS software create semafore's when powerfail conditions
|
|
occur then read on. The MBSE BBS taskmanager and a lot of utilities will act on two special semafore's,
|
|
they are:
|
|
|
|
<ol>
|
|
<li><code>upsalarm</code>, this semafore should be set when there is no mains power, but there is enough
|
|
power left to operate your system. All background tasks will be suspended as long as this condition
|
|
is true. If the power comes back, the UPS software should remove this semafore.
|
|
<li><code>upsdown</code>, this semafore should be set when the UPS sofware signals your system to go down.
|
|
This is a fatal condition and there is no way back. Even if the power comes back your system should
|
|
shutdown and the UPS will disconnect the power to your system. After a while it will turn the power on
|
|
again and your system boots. MBSE BBS will if this semafore is seen kick users out of the bbs, and the
|
|
system shutdown script will try to close MBSE BBS as quick as possible. Normal the close timeout is
|
|
one hour to let users normal finnish what they were doing, now it is only 30 seconds and if they were
|
|
not logged out, they will be disconnected anyway.
|
|
</ol>
|
|
I know not all UPS software can do this but most UPS software is open source so you can change it to create
|
|
these semafore's. It is not a problem that UPS semafore's still exist if the systems boots, the MBSE BBS
|
|
startup scripts will remove them before the bbs is started.
|
|
<P> <P>
|
|
|
|
|
|
<A HREF="index.html"><IMG SRC="images/b_arrow.png" ALT="Back" Border="0">Go Back</A>
|
|
</BLOCKQUOTE>
|
|
</BODY>
|
|
</HTML>
|