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diff -rup busybox-1.01/.pc/udhcpscript.patch/examples/udhcp/simple.script busybox-1.01/examples/udhcp/simple.script
--- busybox-1.01/examples/udhcp/simple.script 1970-01-01 00:00:00.000000000 +0000
+++ busybox-1.01/examples/udhcp/simple.script 1970-01-01 00:00:00.000000000 +0000
@@ -1,40 +1,129 @@
#!/bin/sh
+# slugos UDHCP client script
+#
+. /etc/default/functions
+
+echodns(){
+ local dns
+ if test $# -gt 0
+ then
+ for dns in "$@"
+ do
+ echo "nameserver $dns #dhcp:$interface"
+ done
+ fi
+}
-# udhcpc script edited by Tim Riker <Tim@Rikers.org>
+# Output the correct contents for resolv.conf based on
+# the current one and any new information
+mkresolv() {
+ local rmdomain
+ rmdomain=
+ # last search takes precedence, so a user
+ # specified search in resolv.conf is retained
+ test -n "$domain" && {
+ echo "search $domain #dhcp"
+ rmdomain='|search [^ ]* #dhcp'
+ }
+ # first nameserver takes precedence, use a user
+ # specified nameserver in preference then the
+ # new ones
+ egrep -v '^(nameserver [^ ]* #dhcp:.*'"$rmdomain"')$' "$1"
+ echodns $dns
+ egrep '^nameserver [^ ]* #dhcp:.*$' "$1" | egrep -v :"$interface"'$'
+}
+
+# checksum of a file (or stdin if -)
+md5strm() {
+ md5sum $1 2>/dev/null | sed -n 's/^\([0-9A-Za-z]*\).*$/\1/p'
+}
+
+# update resolv.conf for $interface using $domain and $dns
+updresolv() {
+ local md5old md5new resolv
+ md5old="$(md5strm /etc/resolv.conf)"
+ resolv="$(mkresolv /etc/resolv.conf)"
+ md5new="$(echo "$resolv" | md5strm -)"
+ test "$md5old" != "$md5new" && echo "$resolv" >/etc/resolv.conf
+}
+
+unroute() {
+ # called to deconfig the interface
+ while route del default gw 0.0.0.0 dev $interface 2>/dev/null
+ do
+ :
+ done
+}
+
+bind() {
+ local B N metric i olddomain resolv
+ B=
+ test -n "$broadcast" && B="broadcast $broadcast"
+ N=
+ test -n "$subnet" && N="netmask $subnet"
+ ifconfig "$interface" "$ip" $B $N up
+
+ # If given router information delete the old information and
+ # enter new stuff, routers get metrics incremented by 1
+ # between each (this is somewhat arbitrary)
+ if test -n "$router"
+ then
+ unroute
+ metric=0
+ for i in $router
+ do
+ route add default gw "$i" dev "$interface" metric $((metric++))
+ done
+ fi
-[ -z "$1" ] && echo "Error: should be called from udhcpc" && exit 1
+ olddomain=
+ test -r /etc/defaultdomain && olddomain="$(cat /etc/defaultdomain)"
+ if test -n "$domain" -a "$domain" != "$olddomain"
+ then
+ echo "$domain" >/etc/defaultdomain
+ # and update the kernel view too
+ echo "$domain" >/proc/sys/kernel/domainname
+ fi
-RESOLV_CONF="/etc/resolv.conf"
-[ -n "$broadcast" ] && BROADCAST="broadcast $broadcast"
-[ -n "$subnet" ] && NETMASK="netmask $subnet"
+ updresolv
+}
case "$1" in
- deconfig)
- /sbin/ifconfig $interface 0.0.0.0
- ;;
-
- renew|bound)
- /sbin/ifconfig $interface $ip $BROADCAST $NETMASK
-
- if [ -n "$router" ] ; then
- echo "deleting routers"
- while route del default gw 0.0.0.0 dev $interface ; do
- :
- done
-
- metric=0
- for i in $router ; do
- route add default gw $i dev $interface metric $((metric++))
- done
+deconfig)
+ # Bring the interface up (without inet at this point)
+ # Remove the resolver information because deconfig is called
+ # on leasefail and we need to remove this interface at that
+ # point to ensure the machine remains visible on another
+ # interface!
+ domain=
+ dns=
+ unroute
+ updresolv
+ ifconfig "$interface" up;;
+
+renew|bound)
+ bind;;
+
+leasefail)
+ # Pull the values from the config data if (only only if) this
+ # is the config interface
+ if test "$interface" = "$(config iface)"
+ then
+ ip="$(config ip)"
+ if test -n "$ip"
+ then
+ router="$(config gateway)"
+ subnet="$(config netmask)"
+ broadcast="$(config broadcast)"
+ domain="$(config domain)"
+ dns="$(config dns)"
+
+ bind
fi
+ fi;;
- echo -n > $RESOLV_CONF
- [ -n "$domain" ] && echo search $domain >> $RESOLV_CONF
- for i in $dns ; do
- echo adding dns $i
- echo nameserver $i >> $RESOLV_CONF
- done
- ;;
+*) echo "udhcpc: $*: unknown command" >&2
+ exit 1;;
esac
exit 0
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