linux VS key-mapper

It's actually incredibly useful to have apps like window managers or apps that rely on manipulating user input like xcape read another apps data. In fact such are still possible just 10x as complicated as they now involve writing awful little programs in some combination of c and yaml instead of a dead simple single line shell invocation of a program.

See https://gitlab.com/interception/linux/tools

The fact that this can work at all seems to suggest that its just as possible for malicious code running as user to compromise your security and the only thing actually broken is useful apps.

After updating my system after a while, i found Interception-tools to not working . It fails on a dependency on libyaml-cpp.so.0.7

You can try to use https://gitlab.com/interception/linux/tools/-/tree/master

Having both is a game-changer. Depends on your OS. On Mac, I use Karabiner. Linux I used use caps2esc and on Windows I use a custom AutoHotKey.

Before that I had used interception tools for key rebindings, which relied on the udevmon service to intercept keypress events, and thus even works in a TTY terminal, not requiring a window manager. I use vim keybindings in Emacs and for that I found it useful to rebind ESC to CTRL if tapped, but it still acts as CTRL when held (now I have implemented that in my keyboard firmware).

In addition to using ctrl+a as prefix... some of us remap capslock to ctrl so then the two buttons are right next to each other and easy to press with one motion. (This then makes it possible to have that key be ctrl when pressed in combo with another key or esc when pressed on its own.)

i use both X and Wayland and i also have a lot of key switching going on. So to have a universal config that works under both protocols i have to go lower than the display server protocols. I looked around for such a thing and finally found the interception tool

Do you know about https://gitlab.com/interception/linux/plugins/caps2esc? It makes it ctrl when held in combo with another key or esc when pressed on its own w/o other key (I loved it before ergodox) and there are some related plugins there for other keyboard customizations as well.

Caps2Esc is a very useful input remapping utility: it turns the Caps key into either Esc or Control depending on how it's used: - if the Caps key is released before another key is pressed, it emits Esc - If the Caps key is used in chording mode, like by pressing Caps and C, it emits Control, to send Control-C

This may help you!

Another option is key-mapper which runs as a systemd service and lets you map all kinds of things to other things.

Key-mapper

Being a previous windows user I have a mindset that I shouldn't download non mainstream or non trusted applications on my system especially the ones that have admin access or physical device access . I wanted to remap my keyboard in such way which allows me to use capslock key as backspace and alt_r key as escape. setxkbmap and Xmodmap isn't giving required results or I am not too advance to use it properly . I recently stumbled upon this program key-mapper but it requires admin access so should I trust it for daily use. ( I am not a developer and thus does not understand what any of the code does )

There's Key Mapper which I haven't tried yet (still on my 100% rubberdome at the moment so no need) but it looks very promising.