Note that if you're not sure where to find the source for a program, your fallback should be to check the Makefiles, as that's where the names are set. So:
$ find /usr/src -name 'Makefile*' -print | xargs grep -lw cu /usr/src/usr.bin/tip/Makefile $ That works not just for linked programs like cu/tip, but also programs whose source directory doesn't match the program name, like opencvs, spellprog, and diff3. Philip Guenther

