/[NO]INPUT_ONLY

   Used with SPY to skip watching terminal output and instead watch only
   the user's input keystrokes, E.g.

     SPY/INPUT_ONLY/TERMINAL=FTA10 or SPY/INPUT_ONLY/USER=J_JONES

   The default value is taken from the logical WATCHER$INPUT_ONLY.

   Your site must be licensed for Input-Only. Any watcher and any user
   being watched or logged must have been authorized by the system
   manager for input-only watching or logging since passwords and other
   non-echoed input are displayed during input watching or logging.

   You can specify the format in which control characters are
   displayed by using the /DISPLAY_TYPE qualifier.

   For more information, see the top-level PEEK Subtopic:
   INPUT_ONLY_watching_and_logging