Jason, you are very fast! I will download the new main.c as soon as I arrive at home and remove the case for the "-m" option. I will remove the "f" option in "[-safe]" as it seems that the argument to it is not optional.
I will submit the patch, based on the updated code, later. Two changes: - remove the "f" option in "-safe" as it cannot be used without an argument. (it cannot be used without an argument, am I wrong?) - remove the case for "-m" as it is nicely handled by the default case. If you agree I will send a patch to Brian Kernighan, but it is perhaps better sending it by "official channels" (i.e. by you). Cheers, Igor.