Don't call iptables if it is not installed. This code is only there to ensure

that packets between domU and the bridge are not firewalled, so if iptables is
not installed, then there is no worry.

Signed-off-by: Ewan Mellor <ewan@xensource.com>

diff --git a/tools/examples/vif-common.sh b/tools/examples/vif-common.sh
index 0f8fcc706f99c4671ba177c77f4606e766a498ed..273cbacab50fdbda29eb123dbb9ec0675c7f4e8f 100644 (file)
--- a/tools/examples/vif-common.sh
+++ b/tools/examples/vif-common.sh
@@ -53,7 +53,8 @@ function frob_iptable()
     local c="-D"
   fi
 
-  iptables "$c" FORWARD -m physdev --physdev-in "$vif" "$@" -j ACCEPT
+  iptables "$c" FORWARD -m physdev --physdev-in "$vif" "$@" -j ACCEPT ||
+    fatal "iptables $c FORWARD -m physdev --physdev-in $vif $@ -j ACCEPT failed"
 }
 
 
@@ -66,6 +67,11 @@ function frob_iptable()
 #
 function handle_iptable()
 {
+  if ! which iptables >&/dev/null
+  then
+    return
+  fi
+
   if [ "$ip" != "" ]
   then
       local addr