reset USB<->RS232 adapter over SSH

[m4rtin]

I'm at home and in my office machine, there is an USB<->RS232 adapter connected to a Cisco device. There is no screen running in the office machine so I can't take this session over. If I connect to my office machine over SSH and start for example minicom, the results are following:

[root@ /usr/home/martin-office]# minicom 
Device /dev/cuaU0 is locked.
[root@ /usr/home/martin-office]# file /dev/cuaU0
/dev/cuaU0: character special
[root@ /usr/home/martin-office]# ls -l /dev/cuaU0
crw-rw----  1 uucp  dialer    0, 117 Dec  9 18:47 /dev/cuaU0
[root@ /usr/home/martin-office]#

One possibility would be to reboot the office machine, however, are there better options? Like somehow resetting the /dev/cuaU0 device?

 

[lme@]

What about killing the process that's locking the device?
# procstat -f -a | grep cuaU0 should show the process.

 

[ondra_knezour]

Maybe watch() may help you to get access to running session?

 

[wblock@]

lme@'s suggestion is the first thing I'd try. usbconfig(8) can reset the USB device. Whether that will kill the program that has it locked...