Are you busy to receive the submissions?

A bash local command that returns "no" when the node asked was absolutely not running any job, otherwise "yes".

areyoubusy(){
njobs=$(pbsnodes -x $1 | grep \<jobs\> | sed -e 's/.*<jobs>//;s/<\/jobs\>.*$//' \
        | awk -F ',' 'END{print NF}')
if [ $njobs -gt 0 ]; then
   echo "yes"
else
   echo "no"
fi
}
# usage: areyoubusy node1.local