coleman@cam.nist.gov (Sean Sheridan Coleman X5672) (01/23/91)
I want to be able to determine if another process has control of an RS232 port on a Alm Board on a Sun4. I am writing a program to gather data from a device that is connected via RS-232. I want to deny access to the program if another program is accessing the port currently. I want to know (1) how to tell if a port is being used currently for a login port. ie.. some has log in using the port (2) how to tell if a process has control of a port for out going communication such as kermit? I use a simplistic tty driver for comunicating to the ports. Is there something I should add to the driver code to allow other programs to do what I have asked about above? Thanks Sean Coleman NIST coleman@bldrdoc.gov