Fix network-bridge shell quoting.

Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>

diff --git a/tools/examples/network-bridge b/tools/examples/network-bridge
index 9244f0a75cd33319a3c30b1ab6f668bf9bf766c6..245f7ce9f0aa0b9cd2eeb6420a5f650c29583abe 100755 (executable)
--- a/tools/examples/network-bridge
+++ b/tools/examples/network-bridge
@@ -96,12 +96,12 @@ get_ip_info() {
     
 do_ifup() {
     if ! ifup $1 ; then
-        if [ ${addr_pfx} ] ; then
+        if [ -n "$addr_pfx" ] ; then
             # use the info from get_ip_info()
             ip addr flush $1
             ip addr add ${addr_pfx} dev $1
             ip link set dev $1 up
-            [ ${gateway} ] && ip route add default via ${gateway}
+            [ -n "$gateway" ] && ip route add default via ${gateway}
         fi
     fi
 }