Re: tty loop-back device

["Matwey V. Kornilov" <matwey.kornilov@gmail.com>]

28.09.2013 20:03, Grant Edwards пишет:
> What you're talking about is pretty much the existing pty device.
>
> Unfortunately, Linux pty's only support a subset of the serial port
> API, so they can't be used for applications like network-connected
> serial ports.  So people like me have to write kernel-mode drivers for
> such devices.

Yep, pty_set_termios looks like a mock or dummy, when it is critical 
part to applications like network serial port devices. One needs to set 
baudrate, parity, etc.

> I've suggested extending the Linux pty so that it _does_ support the
> rest of the serial port API.  I even offered to work on it if the
> results would likely be accepted into the kernel tree, but my
> questions/offers have never gotten any response.

It seems that BSD and Unix98 pty's may coexist in pty.c. So, there is a 
chance that it is possible to add support of Extended pty not breaking 
existing things. One need to be a brave to change something in pty.c, It 
is quite critical part.

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