Code quality upgrade

This is what you get when Dave Reisner points you at some bash anti-patterns.
Also in this commit:
- updated documentation
- bugfix revision of the IPv6 SLAAC address/route bug

1 files changed, 12 insertions, 16 deletions

diff --git a/src/connections/bridge b/src/connections/bridge
index 3cf60c1..e134647 100644
--- a/src/connections/bridge
+++ b/src/connections/bridge
@@ -6,27 +6,23 @@ bridge_up() {
     local bridge_interface
     load_profile "$1"
 
-    if [ -e "/sys/class/net/$INTERFACE" ]; then
-        if [ ! -d "/sys/class/net/$INTERFACE/brif" ]; then
+    if [[ -e "/sys/class/net/$INTERFACE" ]]; then
+        if [[ ! -d "/sys/class/net/$INTERFACE/brif" ]]; then
             report_fail "Interface $INTERFACE already exists and is not a bridge."
             exit 1
         fi
     else
-        $BRCTL addbr $INTERFACE
+        $BRCTL addbr "$INTERFACE"
     fi
 
     for bridge_client in $BRIDGE_INTERFACES; do
-      ip link set $bridge_client promisc on up
-      ip addr flush dev $bridge_client
-      $BRCTL addif $INTERFACE $bridge_client
+      ip link set "$bridge_client" promisc on up
+      ip addr flush dev "$bridge_client"
+      $BRCTL addif "$INTERFACE" "$bridge_client"
     done
     # Set options
-    if [ -n "$FWD_DELAY" ]; then
-        $BRCTL setfd $INTERFACE "$FWD_DELAY"
-    fi
-    if [ -n "$MAX_AGE" ]; then
-        $BRCTL setmaxage $INTERFACE "$MAX_AGE"
-    fi
+    [[ "$FWD_DELAY" ]] && $BRCTL setfd "$INTERFACE" "$FWD_DELAY"
+    [[ "$MAX_AGE" ]] && $BRCTL setmaxage "$INTERFACE" "$MAX_AGE"
 
     bring_interface up "$INTERFACE"
     "$CONN_DIR/ethernet" up "$1"
@@ -38,14 +34,14 @@ bridge_down() {
     load_profile "$1"
 
     for bridge_client in $BRIDGE_INTERFACES; do
-      ip link set $bridge_client promisc off down
-      $BRCTL delif $INTERFACE $bridge_client
+      ip link set "$bridge_client" promisc off down
+      $BRCTL delif "$INTERFACE" "$bridge_client"
     done
 
     "$CONN_DIR/ethernet" down "$1"
     bring_interface down "$INTERFACE"
-    $BRCTL delbr $INTERFACE
-    return 0 
+    $BRCTL delbr "$INTERFACE"
+    return 0
 }
 
 # Returns status of profile - is it still functional?