source: trunk/essentials/app-shells/bash/tests/jobs1.sub

# make sure that jobs -p, %+, and $! all agree
set -m
sleep 60 &

FN=/tmp/jobs-pid.$$

pid1=$!
jobs -p %+ > $FN
pid2=$(< $FN)
rm $FN

if [ $pid1 -ne $pid2 ]; then
        echo 'oops - $! and jobs -p %+ disagree!'
fi

exec 2>/dev/null
kill -9 $pid1