add a TODO

pacman

@@ -33,7 +33,10 @@ while true; do
     # Wait for the lock.
     [[ -f "$aurpar_config_lock_path" ]] && continue
 
-    # Launch real pacman, swap stdout and stderr.
+    # Launch real pacman, swap stdout and stderr. 
+    # We need to send everything into stderr, as aurpar debug output. 
+    # We also need to grep keyword from stdout, to detect lock failure. 
+    # TODO: tee /dev/stderr permission denied.
     "$aurpar_config_pacman_path" "$@" --noconfirm 3>&1 1>&2 2>&3 | tee /dev/stderr | grep -F "$aurpar_config_lock_path" > /dev/null
     pacman_ret=${PIPESTATUS[0]}
     grep_ret=${PIPESTATUS[1]}