On Apr 11, 6:56 pm, Grant Edwards <gra...@visi.com> wrote: > On 2009-04-11, Grant Edwards <gra...@visi.com> wrote: > > > You can write a port redirector in user-space in MS-Windows, > > but you can't in Linux/Unix. On Unix systems you have to > > write a kernel module that sits below the tty layer. > > Perhaps I should elucidate further. > > That's what the "pty" driver on Unix is: a kernel module that > sits underneath the tty layer where the "normal" serial-port > UART drivers sit. > > However, Unix pty drivers only handles a subset of the normal > serial-port API. [I'm not sure why pty drivers have never been > "finished" so that they fully emulate a serial port, but it's > been that way for 20+ years]. > > If RouteBuddy doesn't try to do things like get/set modem > control/status lines, then the OP might be able to use a pty. > > Each pty consists of two devices: a master end and a slave end. > RouteBuddy would be told to use the slave end, and the OP would > write a program that would transfer data between a network > connection and the master end. > > A pty devices is what is used by programs like xterm to run > programs like bash. Xterm transfers data between a network > connection and the master end of a pty. Bash is connected to > the slave end of that pty and "thinks" it's connected to a > serial port. Bash uses little of the serial port API, so it's > happy with the limited API provided by a pty slave-end. > > -- > Grant
Grant - HERO! THIS EXACTLY WHAT I WANT TO DO... I didn't realise people were still posting on this thread and have spent the last 3 hours trying to get some example code to create a pseudo TTY (pty) in Python, I get that I have to use the pty module, but finding an example is like searching for... lets go festing ...an easter egg in a forest ;) You wouldn't have any pointers to initiating a PTY and how to write to it? This is all I want to achieve. My point in all this is actually that I ordered a USB GPS Receiver and it wont arrive for another two weeks, being my impatient self, I am writing an app for my iPhone to broadcast its GPS location over the network to my laptop. I then want to get this data into the NMEA format and push this data onto a PTY - this will in-effect replace the USB GPS Receiver and the GPS software can read it :) Cheers Stu -- http://mail.python.org/mailman/listinfo/python-list
