Move running dhclient on DHCP interfaces into a pre-mount hook.

Static interfaces are still configured on the fly as we add them, but
discussions on the mailing list have suggested that we need to have finer
control over bringing up dhcp interfaces.

The default hook just runs all the requested dhclients in parallel and waits
for them to all return.  If you need something more complicated than this, or
need to have more control over bringing interfaces up, you will probably need
to override some stuff in the 40network hook.

dhclient-script

@@ -19,7 +19,9 @@ case $reason in
 	for s in $new_domain_name_servers; do
 	    echo "nameserver $s" >> /etc/resolv.conf
 	done
-	set |grep -e '^new_[a-z_]=' >/net.$interface.dhcpopts
+	set |grep -e '^new_[a-z_]=' |while read line; do
+	    echo "${line%%=*}=\'${line#*=}\'">>/net.$interface.dhcpopts
+	done
 	>/net.$interface.up ;;
     *) ;;
 esac

hooks/run-dhclient.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+for i in /net.*.dhcp; do
+    dev=${i#net.}; dev=${i%.dhcp}
+    dhclient -1 -q $dev &
+done
+wait
+    

ifup

@@ -1,5 +1,4 @@
 #!/bin/sh
->/net.$1
 
 # loopback is always handled the same way
 [ "$1" = "lo" ] && {
@@ -14,13 +13,13 @@ for p in $(cat /proc/cmdline); do
     p=${p#ip=}
     case $p in
 	none|off) exit 0;; # we were told to not configure anything
-	dhcp|on|any) dhclient -nw "$1"; exit 0;; 
+	dhcp|on|any) >/net.$1.dhcp; exit 0;; 
 	bootp|rarp|both) exit 0;; #dunno how to do this
 	*) echo ${ip#ip=} | \
 	    (IFS=':' read client server gw netmask hostname device autoconf
 		if [ -z "$device" -o "$device" = "$1"  ]; then
 		    case $autoconf in
-			dhcp|on|any) dhclient -nw "$1";;
+			dhcp|on|any) >/net.$1.dhcp ;;
 			none|off|'') # do some basic configuration
 			    ip link set $1 up
 			    ip addr add $client/$netmask dev $1

modules/40network.sh

@@ -5,3 +5,4 @@ inst "$dsrc/dhclient-script" "/sbin/dhclient-script"
 instmods =networking ecb arc4
 inst_rules "$dsrc/rules.d/60-net.rules"
 inst_hook pre-pivot 10 "$dsrc/hooks/kill-dhclient.sh"
+inst_hook pre-mount 70 "$dsrc/hooks/run-dhclient.sh"