#!/bin/bash

# This example script retrieves the DHCP state of a given interface.
# In the interest of keeping the KVP daemon code free of distro specific
# information; the kvp daemon code invokes this external script to gather
# DHCP setting for the specific interface.
#
# Input: Name of the interface
#
# Output: The script prints the string "Enabled" to stdout to indicate
#	that DHCP is enabled on the interface. If DHCP is not enabled,
#	the script prints the string "Disabled" to stdout.
#
# Each Distro is expected to implement this script in a distro specific
# fashion. 

#set -x

IF_FILE="/etc/network/interfaces"
NMCMD="nmcli"

function checknetworkmanager {
	#Assumes if $NMCMD exists, inteface exists and interface is not
	#  in $IF_FILE then dhcp is being used by NM
        if  hash $NMCMD >/dev/null 2>&1  ; then
                if  $NMCMD  dev status |grep -q $1  ; then
                        echo "Enabled"
                else
                        echo "Disabled"
                fi
        else
                #Give up
                echo "Disabled"
        fi
}

if [ -z $1 ]  ; then echo "Disabled"; exit; fi

if [ -e $IF_FILE ]; then
	if grep -v -e "^#" $IF_FILE|grep -q $1 ; then
		#interface exists so
		if grep -q -e $1\.\*dhcp $IF_FILE; then 
			echo "Enabled"; exit;
		else
			echo "Disabled"; exit;
		fi
	else
		checknetworkmanager $1
		exit
	fi
else
	checknetworkmanager $1
	exit
fi