More like a dumb generic operating system irritation that nobody has bothered
to fix. When you run a program then open a file from within the program, the
file is properly protected from being written to by other programs.
But when you close the file within the program, the operating system refuses to
let go of it until the program used to open the file is exited, and sometimes
even then the OS refuses to acknowledge that the file is closed.
One imagines the Babbage machine with a teleprinter rapping out "That cam is in
use, please wait" while it is quite clearly NOT in use.
From: Jim Craig <jimcraig5...@windstream.net>
To: Enhanced Machine Controller (EMC) <emc-users@lists.sourceforge.net>
Sent: Thursday, May 12, 2016 11:51 AM
Subject: Re: [Emc-users] USB flash drive issue
More info.
So I did the same as before. Plugged in the usb to the linux box. Went
to LinuxCNC using Axis GUI. Opened a file from the /media/usb0/
directory in Axis. Opened a file on the local hard drive in Axis. Axis
is no longer showing the file from the usb on the graphical display or
in the g-code text box.
Went to a terminal and tried: umount /media/usb0/ and received an error
that the volume was busy.
Did lsof /media/usb0/ and it showed that AXIS was still using the file
that I had opened.
When I closed LinuxCNC Axis the file and volume were released and I
could umount them.
This seems like a bug.
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