tmux "using" removable media? Why & how to stop it.

[Porcelain Mouse]

Dear TMUX Users,

Has anyone else observed this? Sometimes, and without any cause as far as
I can determine, tmux starts using removable media, preventing me from
unmounting it.

I start tmux first thing after every reboot. I recently rebooted, logged
in, and started tmux as normal. Then, a little bit later, I mounted a
flash drive, copied some files, and when I went to unmount the drive, I
found that tmux was "using" the drive. I assume this means that the tmux
process had the mounted directory open, as if I had started my tmux
session in a directory somewhere on the mounted removable filesystem--but
I didn't! I had to kill my four sessions just to unmount the drive.

1) Has anyone else seen this, i.e, unexpected tmux "using" of removable
filesystems?

2) What could cause this?

3) Let's say I did start a session or new-window on the mounted
filesystem. I assume that will cause this, if anything. How do I
reverse it or undo it with out killing all my sessions. I closed the
session I was most recently using and then started closing other
sessions that I am *sure* I didn't use since I had mounted the
removable drive, but I couldn't get tmux to release the FS.

I've experienced this three times, now, and I'm baffled.

[Thomas Adam]

Post by Porcelain Mouse
I start tmux first thing after every reboot. I recently rebooted, logged
in, and started tmux as normal. Then, a little bit later, I mounted a
flash drive, copied some files, and when I went to unmount the drive, I
found that tmux was "using" the drive. I assume this means that the tmux

It's possible the FD is open to the directory or something. Can you
send through some logs?

-- Thomas Adam

[Nicholas Marriott]

Probably either a session or window was created with the working
directory inside the removable media. You can change session wd with
attach -c, windows you will need to kill.

Post by Porcelain Mouse
Dear TMUX Users,
Has anyone else observed this? Sometimes, and without any cause as far as
I can determine, tmux starts using removable media, preventing me from
unmounting it.
I start tmux first thing after every reboot. I recently rebooted, logged
in, and started tmux as normal. Then, a little bit later, I mounted a
flash drive, copied some files, and when I went to unmount the drive, I
found that tmux was "using" the drive. I assume this means that the tmux
process had the mounted directory open, as if I had started my tmux
session in a directory somewhere on the mounted removable filesystem--but
I didn't! I had to kill my four sessions just to unmount the drive.
1) Has anyone else seen this, i.e, unexpected tmux "using" of removable
filesystems?
2) What could cause this?
3) Let's say I did start a session or new-window on the mounted
filesystem. I assume that will cause this, if anything. How do I
reverse it or undo it with out killing all my sessions. I closed the
session I was most recently using and then started closing other
sessions that I am *sure* I didn't use since I had mounted the
removable drive, but I couldn't get tmux to release the FS.
I've experienced this three times, now, and I'm baffled.
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[Balazs Kezes]

Post by Nicholas Marriott
Probably either a session or window was created with the working
directory inside the removable media. You can change session wd with
attach -c, windows you will need to kill.

It also affects panes when you open one in the directory which you want
to unmount. And it is quite hard to track down which pane is holding the
fd. See [1] for a previous discussion about this.

[1] http://sourceforge.net/p/tmux/tickets/164/