rshd depends on risky assumption

[Doug Gwyn]

In article <KARL.89Aug23121144 at triceratops.cis.ohio-state.edu> karl at triceratops.cis.ohio-state.edu (Karl Kleinpaste) writes:
-gwyn at smoke.brl.mil writes:
-   The 4.3BSD rshd (normally in its child branch) unconditionally
-   closes an FD named "f" in the source code without checking whether
-   f = 0, 1, or 2.
-It doesn't have to do so.  `f' is passed into doit() from main() as a
-constant 0.

If it were, then the code would be horribly wrong!