examples/udhcp/simple.script: add possibility to use modern "ip"

Script uses "ifconfig" only, not up-to-date so much.
This patch adds "ip" in condition if exists.

Signed-off-by: Jiří Prchal <jiri.prchal@aksignal.cz>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 15 insertions, 3 deletions

diff --git a/examples/udhcp/simple.script b/examples/udhcp/simple.script
index e4c1f2d76..44aa46ece 100755
--- a/examples/udhcp/simple.script
+++ b/examples/udhcp/simple.script
@@ -6,19 +6,31 @@ RESOLV_CONF="/etc/resolv.conf"
 [ -n "$1" ] || { echo "Error: should be called from udhcpc"; exit 1; }
 
 NETMASK=""
-[ -n "$subnet" ] && NETMASK="netmask $subnet"
+if command -v ip >/dev/null; then
+        [ -n "$subnet" ] && NETMASK="/$subnet"
+else
+        [ -n "$subnet" ] && NETMASK="netmask $subnet"
+fi
 BROADCAST="broadcast +"
 [ -n "$broadcast" ] && BROADCAST="broadcast $broadcast"
 
 case "$1" in
         deconfig)
                 echo "Setting IP address 0.0.0.0 on $interface"
-                ifconfig $interface 0.0.0.0
+                if command -v ip >/dev/null; then
+                        ip addr flush dev $interface
+                else
+                        ifconfig $interface 0.0.0.0
+                fi
                 ;;
 
         renew|bound)
                 echo "Setting IP address $ip on $interface"
-                ifconfig $interface $ip $NETMASK $BROADCAST
+                if command -v ip >/dev/null; then
+                        ip addr add $ip$NETMASK $BROADCAST dev $interface
+                else
+                        ifconfig $interface $ip $NETMASK $BROADCAST
+                fi
 
                 if [ -n "$router" ] ; then
                         echo "Deleting routers"