miniupnp.tuxfamily.org

[unitedwallabies]

The one-line script invokes `upnpc -s' and parses the output looking for line(s) matching "ExternalIP". The parsing currently uses both grep and sed. Combining grep, cut, awk, and sed on the same pipe-line, though sometimes convenient, is always sub-optimal -- it is Ok for one's own one-shot command-line, but not for an installable utility. Below is a more efficient implementation, that produces equivalent result at much lower cost. Though both approaches are very cheap on modern computers, there is no never a need to invoke more processes than necessary...