PSPP-BUG: [bug #17213] interactive output should go to terminal

[John Darrington]

Follow-up Comment #2, bug #17213 (project pspp):

1. I'm not sure how safe this is:
   if (f == stdin || f == stdout || f == stderr)

Maybe it's possible for two distinct pointers to be associated with the same
stdio stream, or  perhaps it could fail after a call to freopen ?? I don't
know.

Perhaps it would be better to  use 
  if ( fileno(f) == STDIN_FILENO || ...


2. I'll assume that the  HAVE_LIBTERMCAP vs. HAVE_LIBNCURSES change is
correct. That issue is so convoluted I always get confused.

I don't see any other problems.

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