#!/bin/sh case "$1" in libminiupnpc) # Verify the shared library is installed ls /usr/lib/libminiupnpc.so.* > /dev/null ;; miniupnpc) # upnpc without args exits non-zero but prints usage including port # redirection operations and the discover (-l) option upnpc 2>&1 | grep -qi "Add port redirection\|port redirection\|upnp" ;; *) exit 0 ;; esac