Print out only last revision in list of patches

Contributed by Michilimackinac  
Tagged: Solaris  

This will print out a list of patches that omits earlier revs of the same patch. This can be useful to check if a system is at the same level as another (via a diff) system but possibly went through a different patch cycle and ended with different patches at lower revisions.

showrev -p | awk -F- ‘{hold0=$0; hold=$1; while (getline > 0) { if (hold!=$1) {print hold0; hold0=$0} if (hold=$1) hold0=$0 } }’