Excellent. That's very helpful as well.

Michael


On Sat, 19 Nov 2005, Nick Rout wrote:

On Fri, 18 Nov 2005 00:48:19 -0800 (PST)
[EMAIL PROTECTED] wrote:

That was it. Thanks!
M

you could also try

strace -eopen programname

It will give a pretty verbose account of what files are opened by
programname. (and of course devices, like everything else, are files)



On Fri, 18 Nov 2005, John Myers wrote:

On Thursday 17 November 2005 23:54, [EMAIL PROTECTED] wrote:
I have a custom device driver in /dev/ that can only be used by one
program at a time. Since the device is /dev/ttyUSB0, I can see if anyone
is using it by:

        ls -l /proc/*/fd/* | grep ttyUSB0

Is there a utility or other better way I can discover which process, or
better, which program, is using a particular device?

Thanks,
Michael
try lsof

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