Fix script_dir for symlink setup

src/dynamic-ip

@@ -274,7 +274,7 @@ run-hook() {
             "$hook_script" "$@"
         then
             logerr "WARNING: Agent $(basename "$hook_script") had errors"
-            let errors++
+            (( errors++ )) || true
         fi
     done < <(run-parts "${hook_dir}")
 
@@ -419,7 +419,8 @@ if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
     # Internal Initialization
 
     prog_name=$(basename "$0")
-    script_dir=$(dirname "$(readlink -f "$0")")
+    #script_dir=$(dirname "$(readlink -f "$0")")
+    script_dir=$(readlink -f "$(dirname "$0")")
 
 
     # Main