Re: Don't cross the (tty) streams

[Andreas Schwab]

Matthew Wilcox <matthew@xxxxxx> writes:

> Connect two machines with a serial cable.  On the victim:
>
> willy@rowlf:~$ cat </dev/ttyS1
>
> Now, let's find out which ttyS on the other machine is connected ...
>
> willy@teeth:~$ echo foo >/dev/ttyS1
> -bash: echo: write error: Input/output error
>
> Oops, that's not a serial port.  No output on rowlf, as expected.
> OK, carrying on ...
>
> willy@teeth:~$ echo bar >/dev/ttyS0
>
> And yet on rowlf, we now see:
>
> foo
> bar
>
> Looks like there's an error path that doesn't throw away data on -EIO.

Read the thread starting here:
<http://lists.gnu.org/archive/html/bug-bash/2007-09/msg00020.html>.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@xxxxxxx
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
PGP key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/