Created attachment 870104 [details]
Packages updated on 2023-10-11

Until the updated that got applied on openSUSE MicroOS last night,
`/usr/lib/nagios/plugins/check_load -r -w 15,10,05 -c 30,25,20` worked fine.

But since that update:

microos:/var/log/zypp # /usr/lib/nagios/plugins/check_load -r -w 15,10,05 -c
30,25,20
CRITICAL - You need more args!!!
Error opening 

I am not sure where the problem is, I see `monitoring-plugins-load` got
updated, but the last changelog entry is from 2022, so I'd assume this was the
result of some kind of mass rebuild (as the update as big, see the attached log
with all the packages that got installed/updated). Last change on the package
happened 1 year ago, according to
https://build.opensuse.org/package/show/openSUSE:Factory/monitoring-plugins

Seems Fedora had a bug that caused the same output years ago:
https://bugzilla.redhat.com/show_bug.cgi?id=1470823, but it seems it got fixed
by bumping their package to a 2018 commit based on 2.2.1
(https://src.fedoraproject.org/rpms/nagios-plugins/c/97402353898e984baebc50ad4d3f0c304a266e4d?branch=main),
so I'd say this is maybe not related.

I reviewed apparmor changelogs, but could not see anything relevant either.

Checking check_load's code, I'd say this is the line causing this:
https://github.com/nagios-plugins/nagios-plugins/blob/master/plugins/check_load.c#L132

But the fact that CRITICAL error about args is showing confuses me.

Checking
https://github.com/nagios-plugins/nagios-plugins/blob/bade01b453b012af8c712034b8917c8c242b74cd/configure.ac#L1452,
I see `PATH_TO_UPTIME` is... well, basically seems to be the path to the
`uptime` binary, that I can find and it works:

microos:/var/log/zypp # which uptime
/usr/bin/uptime
microos:/var/log/zypp # uptime
 17:31:47  up  13:01,  2 users,  load average: 0.04, 0.01, 0.00

And given I am executing check_load as root and uptime has rights 755... I
don't think this is a problem with the permissions.

Can't see anything on any logs.

I am out of ideas, so happy to debug a bit more if someone can provide a hint
:-)