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