>My machine has only one serial port. Now I want to add more *software* >(virtual) serial ports. I also want to make a virtual serial cable >between a real serial port and a virtual one OR between virtual ports. >Is there any way to solve that problem in our universe? You could write a device driver implementing virtual serial ports. Then you just add an ioctl that connects/disconnects virtual ports to real ports if desired. I do not quite see what this would be good for, but I am sure it's good for learning or for fun. :) Jan Engelhardt -- - : send the line "unsubscribe linux-c-programming" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html