sbin/tpop3d
@unexec if cmp -s %D/etc/tpop3d.conf.dist %D/etc/tpop3d.conf; then rm -f %D/etc/tpop3d.conf; fi
etc/tpop3d.conf.dist
@exec if [ ! -f %D/etc/tpop3d.conf ]; then cp %D/etc/%f %D/etc/tpop3d.conf; fi