ANSI Escape sequences filtered, any reason for that?

[zokrezyl]

Issue description

Tmux is filtering unknown escape sequences and that is making it unusable for the following purpose:

I was intending to use tmux on top of a new opengl terminal https://github.com/zokrezyl/asciterm . Asciterm is using libvterm for rendering text, but also is randering OpenGL shaders received as ANSI escape sequences.

My question is:

• is there any trick to disable this filtering, and let tmux pass them to the underlying terminal or
• would a patch that modifies the behavior be accepted

Required information

platform: Linux x86_64
tmux: 3.0a

[nicm]

You can use the DCS passthrough sequence to pass stuff, for example:

printf "\033Ptmux;abcdef\033\\"

You need to double any \033 in the sequence you want to pass.

[zokrezyl]

Thanks for the quick answer. So the idea is in case environment variable TERM=tmux is defined, to send DCS pass through. Will test it and report back.

[nicm]

Better to check for TMUX than TERM.

[zokrezyl]

Thanks for the advice. Can confirm the DSC pass through worked. Though I just bumped in other limitations I did not think about in my current design.

[github-actions]

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