Charles M. Hannum said:
> What, precisely, are you trying to do?

Using "/dev/tty01" WITHOUT an active carrier e.g. to dial out with "chat".

> The redirection is superfluous and will just cause the shell to hang
> trying to open the device because there's no carrier.

I still do not understand why you thinks this is the correct behavior.
I've never seend any operating system blocking the serial devices if
there's no carrier. Excuse me but I consider this as somehow brain dead.

-- 
Matthias Scheler
tron@colwyn.owl.de