safe cleanup handler

[jackyq2015]

For main script clean up, it would be nice to put into a function and hook the signal to capture the unexpected exit/terminate:
https://www.ibm.com/developerworks/aix/library/au-usingtraps/index.html

[felixlohmeier]

thx @jackyq2015, i will keep that in mind for the next update (sometime in November)

[felixlohmeier]

hi @jackyq2015, is this what you meant? 978344a

[jackyq2015]

@felixlohmeier instead of:
trap cleanup EXIT
should be something like this:
trap cleanup SIGNHUP SIGINT SIGQUIT SIGTERM

The idea is to capture all the the abnormal exit of your application for any reason(manually terminate, your script failed and OR itself failed etc). You would like an ensured clearnup to be executed no matter what.

[felixlohmeier]

thx @jackyq2015, I've got it!