Werk #19148: mk_tsm: Fix plug-in failing on AIX

Component	Checks & agents
Title	mk_tsm: Fix plug-in failing on AIX
Date	Sep 8, 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 2.5.0p14 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT 2.4.0p37 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

On AIX the plug-in aborted with a syntax error and delivered nothing at all, so the TSM Stagingpool, TSM Drive, TSM Storagepool and Scratch Pool services went stale.

The Korn shell at /usr/bin/ksh on AIX is a ksh88, and here-strings (<<<) are not among the redirections it supports. The plug-in used one to feed the list of dsmserv processes into a loop. It now uses a POSIX compliant here-document instead, which every supported shell understands.

Nothing has to be reconfigured. The fix will be deployed with the normal re-bake after an update.

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