I've been asked a couple of times by customers if Linux
supports "transparent printing". AFAICT from looking at tty
and serial drivers, the answer is no.
My understanding of "transparent printing" (gleaned from SCO
1) You've got a serial terminal with an aux serial port (I
remember ADM5's used to have them) which si connected to a
2) That terminal's "main" serial port is hooked to a serial
port on a Unix machine. For example's sake: /dev/ttyS0.
3) The serial driver provides a second device interface, for
4) Data written to /dev/ttyS0 is sent un*erated to the
terminal (and hence shows up on the screen).
5) Data written to /dev/ttySp0 is enclosed between two escape
sequences that route the data to the printer.
Thus the printer can be used by anybody on the system while the
terminal is used simultaneously for a normal interactive
session (apparently the printer-boud data is chopped up into
reasonable sized chunks so that response time on the terminal
doesn't get too bad).
Has anybody seen anything like that under Linux?
Grant Edwards grante Yow! Yow! I want to mail
at a bronzed arti*to