Re: serial device access from welcome script

[Thilo Riessner <thilo@riessner.de>]

Am Mittwoch, 6. September 2006 23:53 schrieben Sie:
> Thilo Riessner writes:
> > >From a program called by the welcome script which tries to access the
> > > serial
> >
> > port (in this case /dev/ttyI0) I get the errormessage:
> >         Port or socket open error!
> > I guess, that the serial port is blocked by the pppd.
> > Is there any possibility to access the serial port nevertheless?
>
> You shouldn't be trying to access the port directly.  Instead, when
> the "welcome" script runs, your script's standard input and standard
> output are connected directly to the tty.
>
> You should be able to use 'read' and 'echo' (or whatever your
> scripting language supports) without having to open anything.
>
> This is true for "connect", "disconnect", "init", and "pty" as well.
Thanks for your hint, but I have the problem, that the program (which is a 
binary program) I am running out of my welcome script (which is a bash 
script) does not support the usage of stdin and stdout, but it demands the 
usage of a device for reading and writing. Is there a trick that I could use 
in the  welcome script to  redirect stdin and stdout to a "device" and use 
that device in the program, which is called from the welcome script.