Exiting fish from a keybinding which calls a function

[enricozb]

Environment

version: fish, version 3.2.1
uname: Linux xibalba 5.11.16-arch1-1 #1 SMP PREEMPT Wed, 21 Apr 2021 17:22:13 +0000 x86_64 GNU/Linux
term: alacritty

The behavior I'm reporting still occurs under sh -c 'env HOME=$(mktemp -d) fish'.

Problem & Reproduction

The following keybinding correctly exits the shell when typing ctrl+t:

bind \ct exit

However, the following keybinding does not exit the shell when typing ctrl+t:

function myexit
  exit
end
bind \ct myexit

Why is this the case?

[faho]

The exit builtin doesn't immediately exit, it marks the session for exit so fish has a chance to clean up, e.g. to fire the exit handlers and such.

In a binding, you're still in the read loop, and it only checks the "session should exit" flag the next run through, so trying to run any command then exits.

Just exit works because there's also an exit bind function, so bind \ct exit does the equivalent of commandline -f exit - which also works here as a workaround.

[enricozb]

Thanks for the explanation.