Werk #19701: MRPE: Fix silent skipping of entries when plugin reads stdin

Component	Checks & agents
Title	MRPE: Fix silent skipping of entries when plugin reads stdin
Date	Apr 14, 2026
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.6.0b1 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT 2.5.0b5 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT 2.4.0p27 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

Previously, when multiple MRPE checks were configured in mrpe.cfg, any plugin that read from stdin could cause subsequent plugins to be skipped during execution of the agent. This bug affected the check_mk_agent.linux, check_mk_agent.aix, check_mk_agent.solaris, check_mk_agent.freebsd and check_mk_agent.openwrt. It has been fixed by redirecting stdin to /dev/null for each MRPE plugin invocation.

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