:>functions.txt
for mandirs in `grep ^MANPATH /etc/man.config |grep -v MANPATH_MAP|awk '{print $2}'`
do
        for myman in `find ${mandirs} -type f -wholename *man[239]\/*.gz`
        do
                echo "--[ ${myman} ]"
                zgrep ^\.BI ${myman} | sed 's/\.BI //' >>functions.txt
        done
done