Something

BEGIN {
        IGNORECASE=1
        #QUEUE="/var/qmail/bin/qmail-queue-real"
        QUEUE="/bin/gawk '{print}'" # for test
        subj_match=31
        atach_match=31
        internal_bug=81
#       getline pid < "/dev/pid"
        getline pid < PROCINFO["pid"]
        file_tmp=("/tmp/email."pid)
        junkmail="/var/log/junkmail" # chown root:nofiles && chmod 664
        r=(getline < file_tmp)
        if (r == -1) {
                t=system("/bin/touch " file_tmp)
        }
        if (t != 0) { exit internal_bug }
        header = 1
        f=0
}