POSTIN

/bin/sh

grep -q '^gdomap' /etc/services                                            \
   || (echo "gdomap 538/tcp # GNUstep distributed objects" >> /etc/services  \
       && echo "gdomap 538/udp # GNUstep distributed objects" >> /etc/services)

POSTUN

/bin/sh

mv -f /etc/services /etc/services.orig
grep -v "^gdomap 538" /etc/services.orig > /etc/services
rm -f /etc/services.orig