Title: Use fzf for ksh history search

	Title: Use fzf for ksh history search
	Author: Solène
	Date: 17 October 2021
	Tags: openbsd shell ksh fzf
	Description:

	# Introduction

	fzf is a powerful tool to interactively select a line among data piped
	to stdin, a simple example is to pick a line in your shell history and
	it's my main fzf use.

	fzf ships with bindings for bash, zsh or fish but doesn't provide
	anything for ksh, OpenBSD default shell. I found a way to run it with
	Ctrl+R but it comes with a limitation!

	This setup will run fzf for looking a history line with Ctrl+R and will
	run it without allowing you to edit the line! /!\

	# Configuration

	In your interactive shell configuration file (should be the one set in
	$ENV), add the following function and binding, it will rebind Ctrl+R to
	fzf-histo function that will look into your shell history.

	```
	function fzf-histo {
	RES=$(fzf --tac --no-sort -e < $HISTFILE)
	test -n "$RES" \|\| exit 0
	eval "$RES"
	}

	bind -m ^R=fzf-histo^J
	```

	Reload your file or start a new shell, Ctrl+R should now run fzf for a
	more powerful history search. Don't forget to install fzf package.