Knowing if someone really stole someone else's code

[Christian Walther]

Sorry if I sound rude, but did you ever read the BSD license?
http://www.freebsd.org/copyright/freebsd-license.html

It says in the first sentence:
"Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met..."

I'd say you can use BSD licensed code for your own projects as long as
you provide the copyright message (with is stated below the part I
quoted above ;). Which is, by the way, a reason for several producers
of WLAN routers to switch from Linux to *BSD: They can alter the
source code, compile it, ship their own devices with it, without
having to provide the source code.