What is wrong with this program?

[hosking at convexs.UUCP]

Among other things, it looks like you never allocate space for "data" in
your program.  You have a pointer, but it doesn't point to anything.  On
a Convex C-1, this leads to a core dump when "fread" tries to do a "bcopy"
with a null pointer.... which is invalid as a user address.  On VAXen and
other machines, null pointers are valid user addresses, which can make
finding such problems a lot more difficult.  One of the biggest problems
in porting 4.2 to a Convex C-1 was exactly this problem... programs tried
to use pointers which had never been initialized.

Hint:  Learn about the program "lint" and use it regularly.  It might have
saved you a lot of work.
				Doug Hosking
				Convex Computer Corp.
				Richardson, TX