gpath <path> [file]
Return the specified path from an OGDL file, or from stdin. If the path is a dot, then the complete input graph is returned. The specifications for the OGDL language and the OGDL path language are available at http://ogdl.org.
For example, if we have a configuration file conf.g like this:
eth0 ip 220.127.116.11 gw 18.104.22.168
then the command
# gpath eth0.ip conf.g