A small bash function, which checks, whether the given host runs a job in the grid. (hostname is just host on some systems!)

isGridJobRunning.sh

#!/usr/bin/env bash

# This function takes a hostname as an argument and returns
# 0 when the given host has at least 1 job running 0 if it has 
# no job (or future).
function hasHostActiveJobs(){ 
        hostname=$1
        qhostout=$(qhost -j -xml -l hostname=$hostname) # Option seems to be called host on other systems
        #echo $qhostout
        filterstring="name='job_state'>r" # Just remove the r for any job
         [[ $qhostout == *$filterstring* ]]
        return $?
}

if hasHostActiveJobs $(hostname); then
        echo "I have a job!"
else
        echo "No job for me."
fi

# Test with
# echo sleep 3 | qsub -l hostname=$(hostname) && watch -n1 bash isGridJobRunning.sh