Solaris 9 and trap signal handlers

Question

I'm looking for a reliable means to trap signals on sub functions under ksh. I seem to get unreliable results while attempting to trap user signals via the kill command.
Specifics: I have a ksh script which autoloads several functions, one of which is a background function to display a sweeping character while the main process is executing. Depending on the exit status of the main process, I kill the background process with either USR1 (16) or USR2 (17) signal and depending on the signal, I display a success or fail message. However, most of the time, the background process is simply terminated without calling the trapped function, occasionally it does call the function, which is really confusing me, along with the fact that this code runs fine on AIX?!?!. Any suggestions would be appreciated!
THANKS!
Code:
function WAIT
trap 'Trap_Exit 0; exit 0' 16
trap 'Trap_Exit 1; exit 1' 17
<display code>
function Trap_Exit
if [[ $1 -eq 0 ]]; then
echo "`tput rc` Success"
else
echo "`tput rc` Failed"
fi
function Kill_WAIT
if [[ $1 -eq 0 ]]; then
kill -s USR1 $WPID
return 0
else
kill -s USR2 $WPID
return 1
fi
}

Answer 1

If your raid array is working and you have a recent version of raidctl installed it should show the following when type raidctl:
bash-2.05# raidctl
RAID RAID RAID Disk
Volume Status Disk Status
c1t0d0 OK c1t0d0 OK
c1t1d0 OK
bash-2.05#
(Note: this is from a V20z)
This would indicate that raid is working on the system. If it says anything else I've always assumed that the raid array is not working. I've see a few instances where setting up the raid array in the bios and then executing raidctl from command line didn't indicate a raid array at all. Turns out that the version of raidctl was old and needed patching on those systems or the system needed a restart for some reason or other.