Re: 8250 serial console fixes -- issue

[Krzysztof Halasa]

Russell King <rmk+lkml@xxxxxxxxxxxxxxxx> writes:

> In that case the problem is unsolvable.  What if I named a process
>
> \n+++ATH0\n
>
> ?  Oh dear, your modem just hung up.  Or maybe:
>
> \n+++AT&C0\n
>
> and now your modem always sets DCD active, so even with detection of DCD
> in the kernel, I can now talk to it via process names after I've forced
> it to disconnect.
>
> And yes, there's modems out there which accept that and act on the '+++'
> immediately - no pause after '+++' required.

Correct, but the escape character can usually be disabled with ATS2=128
or something like that.

The problem was common some time ago with people putting X-header: +++ATH\n
(or was that +++ATH\r ?) in mail headers.
-- 
Krzysztof Halasa
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