when called without mode argument now, the script returns the status of attach

session

@@ -171,15 +171,20 @@ print_scrollback() {
 }
 
 ## Parse first argument (= mode argument)
-if [[ "$#" -lt 1 ]]; then
-  print_help
-  exit $EXIT_INVALID_MODE
-fi
 mode=$1
 shift
 
 ## Now enter mode specific code
 case $mode in
+  "")
+    if [ -z "$DTACH_SESSION_NAME" ];then
+      echo "Currently not attached."
+      exit $EXIT_NOT_ATTACHED
+    else
+      echo "Currently attached to '$DTACH_SESSION_NAME'."
+      exit $EXIT_SUCCESS
+    fi
+    ;;
   "attach"|"att"|"a") 
     exit_if_in_session
     # If no session name specified: select interactively
@@ -204,7 +209,7 @@ case $mode in
     session_path=$(get_session_path $session_name)
     CMD="dtach -a $session_path -e ${config[detach_char]} -r winch "
     #echo $CMD
-    echo "[attached to $session_name]"
+    echo "[attached to '$session_name']"
     [[ "${config[log_session]}" == "yes" ]] && print_scrollback $session_name 
     eval $CMD
     exit $EXITSUCCESS
@@ -231,7 +236,7 @@ case $mode in
       CMD+="/bin/bash" 
     fi
     #echo $CMD
-    echo "[new session $session_name]"
+    echo "[new session '$session_name']"
     eval $CMD
     exit $EXITSUCCESS
     ;;