> I think that the fix to send tty_hangup when the USB-to-serial adapter
is
> disconnected really should go in (there was about a 2-line patch posted
a
> while ago to add this). The application I'm working on required this
patch
> in order to detect that the USB serial port it's talking to has been
> disconnected from the machine - otherwise the behavior you get is
rather
> silly, if you're blocked on a read it never returns after the device
was
> unplugged, and writes return -ENODEV; basically if you don't write
anything
> there is no way whatsoever to detect that the port is gone. It sounds
like
> the poster's application is another where the current behavior of the
USB
> serial driver makes things a real pain..
I *strongly* agree with this! I have exactly the same problem. I'm
blocking on a select to wait for something to happen at ttyUSBx and
my application will block forever when the device gets unplugged.
A tty hangup would be very much welcome in such a situation.
Regards
Joerg
BTW: Where is the 2 line patch to add this?
=====
--
Regards
Joerg
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