#!/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
PATH=$PATH:/sbin:/usr/sbin

. /lib/dracut-lib

getarg rdnetdebug && {
    exec >/tmp/dhclient.$interface.$$.out
    exec 2>>/tmp/dhclient.$interface.$$.out
    set -x
}

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
}

# Catch unlikely initial errors
trap 'echo Errors preparing to configure $netif > $ERR; exit 0' EXIT

netif=$interface
ip=$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.$interface.override ] && . /tmp/net.$interface.override

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

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

setup_interface() {
    [ -n "$mtu" ] && {
	run ip link set $netif down
	run ip link set $netif mtu $mtu
	run ip link set $netif up
    }

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

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

trap - EXIT
exit 0