Werk #20123: mkp add/inspect: Report unreadable files instead of failing silently

Component	Checks & agents
Title	mkp add/inspect: Report unreadable files instead of failing silently
Date	Jul 29, 2026
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	3.0.0b1 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT 2.5.0p11 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

Previously, mkp add and mkp inspect exited silently -- no output at all -- if the given file could not be read. Both commands now tell you what went wrong, for example:

Cannot read file /tmp/coolstuff.mkp: [Errno 13] Permission denied: '/tmp/coolstuff.mkp'

The exit code was, and still is, 1 in these cases.

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