[Nut-upsuser] The system doesn't shutdown

Roger Price roger at rogerprice.org
Thu Oct 29 11:58:01 UTC 2015

On Wed, 28 Oct 2015, George Anchev wrote:

>  ${sbinPath}upsmon -c fsd
> In 'upsmon --help' I read: "- fsd: shutdown all master UPSes (use with 
> caution)". What exactly does this line do?

My understanding is that it calls upsmon running as root to execute the 
command specified by SHUTDOWNCMD in upsmon.conf, and that it checks that 
it is running as root.

> I decided to make a simple test with this script named test:
> #!/bin/bash
> MSG0=$'test'
> echo $MSG0 | /usr/bin/wall
> echo "abc"
> If I run it as root, there is a notification - both in console and in 
> KDE and "abc" in console. But if I attempt to run the test script it as 
> upsd:
> su - upsd -c "./test"
> the result is only silence.

Its upsmon which executes the shutdown command, not upsd.  upsmon only 
accepts the -c values it understands, and will remind you of this if you 
try something else.

I don't know if upsmon is running as root or upsd when it calls wall for a 
shutdown.  If it is running as upsd then there could be a problem.


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