#!/bin/sh -e
# very simple dhclient-script.  All it cares about is bringing the interface
# up, and it does not even try to do anything else.

LOG=/tmp/dhclient.$$.log
ERR=/tmp/network.$$.err

log_err() {
    # avoid the need for cat on the image
    echo "On $netif, the following command:" > $ERR
    echo "    " "$CMD" >> $ERR
    echo "had errors:" >> $ERR
    while read line; do echo "     $line"; done < $LOG >> $ERR
}

run() {
    CMD="$@"
    "$@" >> $LOG 2>&1
}

setup_interface() {
    ip=$new_ip_address
    mtu=$new_interface_mtu
    mask=$new_subnet_mask
    bcast=$new_broadcast_address
    gw=${new_routers%%,*}
    domain=$new_domain_name
    search=$new_domain_search
    namesrv=$new_domain_name_servers
    hostname=$new_host_name

    [ -f /tmp/net.$netif.override ] && . /tmp/net.$netif.override

    if [ -n "$mtu" ] ; then
	run ip link set $netif down
	run ip link set $netif mtu $mtu
	run ip link set $netif up
    fi

    run ip addr add $ip${mask:+/$mask} ${bcast:+broadcast $bcast} dev $netif
    [ -n "$gw" ] && run ip route add default via $gw
    if [ -n "${search}${domain}" -a -n "$namesrv" ] ; then
	echo search $search $domain > /etc/resolv.conf
	for s in $namesrv; do
	    echo nameserver $s >> /etc/resolv.conf
	done
    fi
    if [ ! -e /tmp/hostname.set ] ; then
	[ -n "$hostname" ] && mknod /tmp/hostname.set p && run hostname $hostname
    fi
    :
}

PATH=$PATH:/sbin:/usr/sbin

. /lib/dracut-lib

if getarg rdnetdebug ; then
    exec >/tmp/dhclient.$interface.$$.out
    exec 2>>/tmp/dhclient.$interface.$$.out
    set -x
fi

# Huh? Interface configured?
[ -f "/tmp/net.$netif.up" ] && exit 0

# save offending commands and let udev move on if we have an error
trap 'log_err; exit 0' EXIT

# We already need a set netif here
netif=$interface

case $reason in
    PREINIT)
	run ip link set $netif up
	;;
    BOUND)
	setup_interface 
	set | while read line; do
	    [ "${line#new_}" = "$line" ] && continue
	    echo "$line" 
	done >/tmp/dhclient.$netif.dhcpopts
	>/tmp/net.$netif.up
	echo online > /sys/class/net/$netif/uevent ;;
    *) ;;
esac

trap - EXIT
exit 0