Powerman

ScriptLanguage - powerman - Powerman Device Specification Files - cluster power management utility - Google Project Hosting - http://code.google.com/p/powerman/wiki/ScriptLanguage

"powerman device specifications are rather wierd, and the intent is to replace them with embedded Lua at some point. For this reason, we suggest that you leave the writing of these scripts to the powerman authors. However, if you insist, here is how they work."