Clipboard wiki page should mention allow-passthrough option

I recently spent some time trying to get set-clipboard to work, to eventually discover that I needed to set the allow-passthrough option as well. It would be nice if https://github.com/tmux/tmux/wiki/Clipboard mentioned this.

I don't believe I can edit the wiki myself, but let me know if that's not the case, I'm happy to.

Required information

Please provide the following information:

tmux version (tmux -V). tmux 3.5a
Platform (uname -sp). Linux unknown
$TERM inside and outside of tmux (echo $TERM). tmux-256color, xterm-kitty
Logs from tmux (tmux kill-server; tmux -vv new). n/a

allow-passthrough is not required for set-clipboard.

allow-passthrough is not required for set-clipboard.

Interesting, it seems to be required in my case. Note that what doesn't work without it is OSC52 from applications run within tmux (i.e. set-clipboard on, not external), copying from tmux itself to the system clipboard via OSC52 works fine without it. It made sense to me that this might be blocked based on the description of allow-passthrough.

Probably whatever applications you are using are using the bypass sequence rather than just setting the clipboard normally.

Probably whatever applications you are using are using the bypass sequence rather than just setting the clipboard normally.

It's just Emacs using clipetty, which is hopefully not doing anything too unusual. I also noticed that https://github.com/theimpostor/osc has an explicit check for allow-passthrough, which implies I'm not the only one to encounter this.

Anyway, happy to close this if you think it's not a general issue, just thought it would be worth flagging. Thanks!

Emacs' built-in xterm.el fully supports OSC52 clipboard access, there's no need in extra packages, they only cause issues.

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Clipboard wiki page should mention allow-passthrough option #4214