#!/bin/sh

hosts() {
	if [ ! -r "$HOME/.ssh/config.d/hosts.conf" ]; then
		printf '%s\n' 'SSH host configuration is unavailable.' >&2
		return 1
	fi

	awk '
		tolower($1) == "host" {
			for (field = 2; field <= NF; field++) {
				if ($field !~ /[*?!]/) print $field
			}
		}
	' "$HOME/.ssh/config.d/hosts.conf"
}