1#!/bin/sh
2
3# udhcpc script edited by Tim Riker <Tim@Rikers.org>
4
5[ -z "$1" ] && echo "Error: should be called from udhcpc" && exit 1
6
7RESOLV_CONF="/etc/resolv.conf"
8[ -n "$subnet" ] && NETMASK="netmask $subnet"
9
10# return 0 if root is mounted on a network filesystem
11root_is_nfs() {
12	sed -n 's/^[^ ]* \([^ ]*\) \([^ ]*\) .*$/\1 \2/p' /proc/mounts |
13	grep -q "^/ \(nfs\|smbfs\|ncp\|coda\)$"
14}
15
16have_bin_ip=0
17if [ -x /SBIN_DIR/ip ]; then
18  have_bin_ip=1
19  BROADCAST="broadcast +"
20fi
21
22[ -n "$broadcast" ] && BROADCAST="broadcast $broadcast"
23
24case "$1" in
25	deconfig)
26		if [ -x /SBIN_DIR/resolvconf ]; then
27			/SBIN_DIR/resolvconf -d "${interface}.udhcpc"
28		fi
29		if ! root_is_nfs ; then
30                        if [ $have_bin_ip -eq 1 ]; then
31                                /SBIN_DIR/ip addr flush dev $interface
32                                /SBIN_DIR/ip link set dev $interface up
33                        else
34                                /SBIN_DIR/ifconfig $interface 0.0.0.0
35                        fi
36		fi
37		;;
38
39	renew|bound)
40                if [ $have_bin_ip -eq 1 ]; then
41                        /SBIN_DIR/ip addr add dev $interface local $ip/$mask $BROADCAST
42                else
43                        /SBIN_DIR/ifconfig $interface $ip $BROADCAST $NETMASK
44                fi
45
46		if [ -n "$router" ] ; then
47			if ! root_is_nfs ; then
48                                if [ $have_bin_ip -eq 1 ]; then
49                                        while /SBIN_DIR/ip route del default dev $interface 2>/dev/null ; do
50                                                :
51                                        done
52                                else
53                                        while /SBIN_DIR/route del default gw 0.0.0.0 dev $interface 2>/dev/null ; do
54                                                :
55                                        done
56                                fi
57			fi
58
59			metric=10
60			for i in $router ; do
61                                if [ $have_bin_ip -eq 1 ]; then
62                                        /SBIN_DIR/ip route add default via $i metric $metric
63                                else
64                                        /SBIN_DIR/route add default gw $i dev $interface metric $metric 2>/dev/null
65                                fi
66                                metric=$(($metric + 1))
67			done
68		fi
69
70		# Update resolver configuration file
71		R=""
72		[ -n "$domain" ] && R="domain $domain
73"
74		for i in $dns; do
75			echo "$0: Adding DNS $i"
76			R="${R}nameserver $i
77"
78		done
79
80		if [ -x /SBIN_DIR/resolvconf ]; then
81			echo -n "$R" | /SBIN_DIR/resolvconf -a "${interface}.udhcpc"
82		else
83			echo -n "$R" > "$RESOLV_CONF"
84		fi
85		;;
86esac
87
88exit 0
89