self-abusing C programs

[jack at rlgvax.UUCP]

> Re:    main(){system("cat foo.c");}
> 
> I beleive there is an implicit assumption that programs that
> simply print out their source files do not qualify as
> "self reproducing" because they are so trivial.  If we alow this,
> then cat can produce any arbitrary program whose source is already
> on the system.  Not very exciting.
> 
> --jcz
> North Carolina State University

To make writing self-replicating C programs fun, I'd say
the reasonable restriction is that they are forbidden to
make any system call except 'write'.

I have one that satisfies the further restriction that
it makes no call on any library routine except 'write'.