def query(logfile, jobID = None):
    joblist = logfile.readFromLogfile()
    if jobID and type(jobID) == type(1):
        command = ['qstat', '-j', str(jobID)]
    else:
        command = ['qstat']
    processoutput = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE).communicate()
    output = processoutput[0]
    serror = processoutput[1]
    jobs = {}
    if type(jobID) == type(1):
        if serror.find("Following jobs do not exist") != -1:
            return False
        else:
            return True
    if not output.strip():
        colorprinter.message("No jobs running at present.")
    output = output.strip().split("\n")
    if len(output) > 2:
        for line in output[2:]:
            tokens = line.split()
            jid = int(tokens[0])
            jobstate = tokens[4]
            details = {  "jobid" : jid,
                         "prior" : tokens[1],
                         "name" : tokens[2],
                         "user" : tokens[3],
                         "state" : jobstate,
                         "submit/start at" : "%s %s" % (tokens[5], tokens[6])
                         }
            jataskID = 0
            if jobstate == "r":
                details["queue"] = tokens[7]
                details["slots"] = tokens[8]
            elif jobstate == "qw":
                details["slots"] = tokens[7]
                if len(tokens) >= 9:
                    jataskID = tokens[8]
                    details["ja-task-ID"] = jataskID
            if len(tokens) > 9:
                jataskID = tokens[9]
                details["ja-task-ID"] = jataskID
            jobs[jid] = jobs.get(jid) or {}
            jobs[jid][jataskID] = details
            if joblist.get(jid):
                jobdir = joblist[jid]["Directory"]
                jobtime = joblist[jid]["TimeInSeconds"]
                colorprinter.message("Job %d submitted %d minutes ago. Status: '%s'. Destination directory: %s." % (jid, jobtime / 60, jobstate, jobdir))
            else:
                colorprinter.message("Job %d submitted at %s %s. Status: '%s'. Destination directory unknown." % (jid, tokens[5], tokens[6], jobstate))
        return True