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Problem finding what is using a serial port

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Operating Systems SCO Problem finding what is using a serial port
# 1  
Old 11-07-2012
Problem finding what is using a serial port
How can I determine what process is currently using a serial port? A good bit of google searching hasn't turned up anything useful, but it seems like there has to be a way to do this without too much difficulty.

When I first started looking into this problem, I assumed that when a port was in use, a lock file would be generated for it. Is that not correct? If it is, where are these locks stored?

Any help is greatly appreciated.
# 2  
Old 11-07-2012
Try
Code:
/etc/fuser /dev/tty1a

The output is the pid of any processes using it.

Lock files would be in /usr/spool/uucp, but only if the program using the file is cu, uucp or login/getty
This User Gave Thanks to jgt For This Post:
jdsnatl
# 3  
Old 11-08-2012
Thanks very much, that worked like a charm.
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