Improved handling of exposed variables

Hooks can now tell the command to be executed by looking at $Command.
The value will be "start", "stop", or "" (undefined), depending on the
reason a profile is being sourced.

src/lib/globals

@@ -119,6 +119,7 @@ load_profile() {
     while IFS= read -r hook; do
         source "$hook"
     done < <(find -L "$PROFILE_DIR/hooks" -maxdepth 1 -type f -executable -not -name '.*' -not -name '*~' -not -name $'*\n*' | sort -u)
+    unset hook
     source "$PROFILE_DIR/$1"
     if [[ -z $Interface ]]; then
         exit_error "Profile '$1' does not specify an interface"

src/lib/network

@@ -85,7 +85,8 @@ cd /
 if [[ $# -eq 1 && $1 == wait-online ]]; then
     network_wait_online
 elif [[ $# -eq 2 && $1 == @(start|stop) ]]; then
-    # Expose the profile name
+    # Expose the profile name and command
+    Command=$1
     Profile=$2
     load_profile "$Profile"
     load_interface_config "$Interface"

src/wifi-menu

@@ -35,7 +35,7 @@ init_profiles() {
     local i=0 essid profile
     while IFS= read -r profile; do
         essid=$(
-            unset INTERFACE ESSID
+            unset Interface ESSID
             source "$PROFILE_DIR/$profile" > /dev/null
             if [[ "$Interface" = "$1" && -n "$ESSID" ]]; then
                 printf "%s" "$ESSID"