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    Command:

    upssched

    
    
    

    SYNOPSIS

           upssched
    
               Note
               upssched should be run from upsmon(8) via the NOTIFYCMD. You should
               never run it directly during normal operations.
    
    
    

    DESCRIPTION

           upssched was created to allow users to execute programs at times
           relative to events being monitored by upsmon(8). The original purpose
           was to allow for a shutdown to occur after some fixed period on
           battery, but there are other uses that are possible.
    
    
    

    INTEGRATION

           upssched needs to be called as the NOTIFYCMD in your upsmon.conf(5). It
           determines what is happening based on the UPSNAME and NOTIFYTYPE
           environment variables. You should never have to deal with them
           directly.
    
           Set the EXEC flag on the events that you want to see in upssched. For
           example, to make sure that upssched hears about ONLINE, ONBATT and
           LOWBATT events, the flags would look like this:
    
               NOTIFYFLAG ONLINE EXEC
               NOTIFYFLAG ONBATT EXEC
               NOTIFYFLAG LOWBATT EXEC
    
           If you also want to continue writing to the syslog, just add it in:
    
               NOTIFYFLAG ONLINE SYSLOG+EXEC
               NOTIFYFLAG ONBATT SYSLOG+EXEC
               NOTIFYFLAG LOWBATT SYSLOG+EXEC
    
           For a full list of notify flags, see the upsmon(8) documentation.
    
    
    

    CONFIGURATION

           See upssched.conf(5) for information on configuring this program.
    
    
    

    EARLY SHUTDOWNS

           To shut down the system early, define a timer that starts due to an
           ONBATT condition. When it triggers, make your CMDSCRIPT call your
           shutdown routine. It should finish by calling upsmon -c fsd so that
           upsmon gets to shut down the slaves in a controlled manner.
    
           Be sure you cancel the timer if power returns (ONLINE).
    
    
    

    DEBOUNCING EVENTS

           If your UPS goes on and off battery frequently, you can use this
           program to reduce the number of pager messages that are sent out.
           Rather than sending pages directly from upsmon(8), use a short timer
           here. If the timer triggers with the UPS still on battery, then send
           the page. If the power returns before then, the timer can be cancelled
           impact. It will come and go from the process list as necessary. When a
           new timer is started, a process will be forked to actually watch the
           clock and eventually start the CMDSCRIPT. When a timer triggers, it is
           removed from the queue. Cancelling a timer will also remove it from the
           queue. When no timers are present in the queue, the background process
           exits.
    
           This means that you will only see upssched running when one of two
           things is happening:
    
           ?   There's a timer of some sort currently running
    
           ?   upsmon just called it, and you managed to catch the brief instance
    
           The final optimization handles the possibility of trying to cancel a
           timer when there are none running. If the timer daemon isn't running,
           there are no timers to cancel, and furthermore there is no need to
           start a clock-watcher. So, it skips that step and exits sooner.
    
    
    

    FILES

           upssched.conf(5)
    
    
    

    SEE ALSO

           upsmon(8)
    
       Internet resources:
           The NUT (Network UPS Tools) home page: http://www.networkupstools.org/
    
    
    

    Network UPS Tools 10/09/2011 UPSSCHED(8)

    
    
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