#!/bin/sh
set -e

# No trailing slash
conf_dir="/etc/net"
interface="iwn0"

help(){
cat <<EOF
Usage: $0 [option]

$0 Allows you to set, edit, or display saved interface configurations placed
in "$conf_dir".

Configurations are in the standard hostname.if(5) format.

Where option is:
	-l List all of the available network names.
	-s "\$name" Sets the network name
	-e "\$name" Edit the configuration file of "\$name"
	-d "\$name" Display the configuration file of "\$name"
	-i "\$interface" Override the interface ($interface)  set in the script.
	-D Set the interface down and remove all IP addresses
EOF
if ! [ -z "$1" ] ; then
	exit "$1"
else
	exit 0
fi
}

list() {
	find "$conf_dir" -type f | sed -e"s@$conf_dir/@@g"
}

edit_net() {
	if [ -z "$1" ] ; then
		echo "Please pass in a file name!"
		exit 1
	fi
	_f="$1"; shift
	"$EDITOR" "${conf_dir}/$_f"
}

display_net() {
	if [ -z "$1" ] ; then
		echo "Please pass in a file name!"
		exit 1
	fi
	_f="$1"; shift
	cat "${conf_dir}/$_f"
}

set_net() {
	if [ -z "$1" ] ; then
		echo "Please pass in a file name!"
		exit 1
	fi
	_f="$1"; shift

	if [ -L "/etc/hostname.${interface}" ] ; then
		rm "/etc/hostname.${interface}"
	fi
	ln -s "${conf_dir}/$_f" "/etc/hostname.${interface}"
	sh /etc/netstart
}

down_net() {
	ifconfig "$interface" down -inet -inet6
}

if [ -z "$1" ] ; then
	help
fi
while [ $# -gt 0 ] ; do case $1 in
	-i) interface="$2"; shift; shift ;;
	-l) shift; list ; break ;;
	-s) shift; set_net "$@" ; break ;;
	-d) shift; display_net "$@" ; break ;;
	-e) shift; edit_net "$@" ; break ;;
	-D) shift; down_net "$@" ; break ;;
	*) help 1;;
esac ; done