busybox: port improvements to simple.script from Debian (udhcpc)

* Support resolvconf
* Avoid bashism $((metric++))
* Use 'domain' instead of 'search' for domain parameter

(From OE-Core rev: 3d4ccf98b83fe662f375cd5b029fdd602824c0e8)

Signed-off-by: Andreas Oberritter <obi@opendreambox.org>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 21 insertions, 8 deletions

diff --git a/meta/recipes-core/busybox/busybox_1.19.4.bb b/meta/recipes-core/busybox/busybox_1.19.4.bb
index 0b1e78746a..a797ac9392 100644
--- a/meta/recipes-core/busybox/busybox_1.19.4.bb
+++ b/meta/recipes-core/busybox/busybox_1.19.4.bb
@@ -1,5 +1,5 @@
 require busybox.inc
-PR = "r4"
+PR = "r5"
 
 SRC_URI = "http://www.busybox.net/downloads/busybox-${PV}.tar.bz2;name=tarball \
            file://B921600.patch \
diff --git a/meta/recipes-core/busybox/files/simple.script b/meta/recipes-core/busybox/files/simple.script
index 5cc21b9de2..27368f0ee5 100644
--- a/meta/recipes-core/busybox/files/simple.script
+++ b/meta/recipes-core/busybox/files/simple.script
@@ -20,6 +20,9 @@ fi
 
 case "$1" in
         deconfig)
+                if [ -x /sbin/resolvconf ]; then
+                        /sbin/resolvconf -d "${interface}.udhcpc"
+                fi
                 if ! root_is_nfs ; then
                         if [ $have_bin_ip -eq 1 ]; then
                                 ip addr flush dev $interface
@@ -53,19 +56,29 @@ case "$1" in
                         metric=0
                         for i in $router ; do
                                 if [ $have_bin_ip -eq 1 ]; then
-                                        ip route add default via $i metric $((metric++))
+                                        ip route add default via $i metric $metric
                                 else
-                                        route add default gw $i dev $interface metric $((metric++)) 2>/dev/null
+                                        route add default gw $i dev $interface metric $metric 2>/dev/null
                                 fi
+                                metric=$(($metric + 1))
                         done
                 fi
 
-                echo -n > $RESOLV_CONF
-                [ -n "$domain" ] && echo search $domain >> $RESOLV_CONF
-                for i in $dns ; do
-                        echo adding dns $i
-                        echo nameserver $i >> $RESOLV_CONF
+                # Update resolver configuration file
+                R=""
+                [ -n "$domain" ] && R="domain $domain
+"
+                for i in $dns; do
+                        echo "$0: Adding DNS $i"
+                        R="${R}nameserver $i
+"
                 done
+
+                if [ -x /sbin/resolvconf ]; then
+                        echo -n "$R" | /sbin/resolvconf -a "${interface}.udhcpc"
+                else
+                        echo -n "$R" > "$RESOLV_CONF"
+                fi
                 ;;
 esac