>>>>> "John" == John H Darrah <[EMAIL PROTECTED]> writes:

  John> Does any one know if ferror returns anything on a
  John> framing, parity or overrun error? It appears that
  John> it doesn't from the testing I've done.

man termios; see PARMRK.

ferror(3) is a stdio function.  It doesn't actually know anything
about the underlying hardware.  IMHO, if your application actually
cares that the underlying comms. layer is serial rather than (e.g.) a
file or a network pty then you should consider using read(2) and
write(2) instead of stdio.


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