/INPUT_ONLY can be used with SPY to skip watching terminal output and
   instead watch only the user's input keystrokes.

   The /DISPLAY_TYPE qualifier allows you to chose the format in which
   control characters are displayed during input-only watching or logging.

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

   Rights-list Identifiers are used to specify who may watch, or be watched,
   with /INPUT_ONLY. The Rights-list Identifiers used are
   SPY$INPUT_WATCHER and SPY$INPUT_WATCHEE.

   Any user using the input-watching feature to watch another with SPY
   must have been granted the Rights-list Identifier SPY$INPUT_WATCHER.

   Any user who is going to be watched /INPUT_ONLY with SPY must have been
   granted the Rights-list Identifier SPY$INPUT_WATCHEE.

   For help on /INPUT_ONLY watching, see the top-level PEEK Subtopic:
   Watching /INPUT_ONLY.

   INPUT_ONLY terminal-logging is done using NDC's KeyCapture product.

1  –  License-Option

   You must get a special license key from NDC in order to do input
   watching or logging.

   A PEEK/SHOW LICENSE command will display whether your site has enabled
   the input-only watching/logging feature in PEEK or SPY.

   If your site is licensed for INPUT_ONLY, then to use this feature both
   any watcher and the user/logger must have been granted the proper
   rights-ids.

   For more information, see the PEEK INPUT_ONLY_watching_and_logging
   Subtopic: Rights-IDs.

   GREAT CARE SHOULD BE USED WHEN LICENSING THE INPUT-ONLY FEATURE SINCE
   IT ALLOWS THE WATCHING OR LOGGING OF PASSWORDS AND OTHER NON-ECHOED
   INPUT.

2  –  Rights-IDs

   If your site is licensed to use the Input-Only feature then input-only
   watching/logging can be authorized for specific users by granting them
   the proper rights-ids.

   For being watched by SPY with /INPUT_ONLY the ID is SPY$INPUT_WATCHEE.

   For watching with SPY using /INPUT_ONLY the ID is SPY$INPUT_WATCHER.

   To add these identifiers to the system rights database use the
   AUTHORIZE commands ADD/IDENTIFIER SPY$INPUT_WATCHER, and
   ADD/IDENTIFIER SPY$INPUT_WATCHEE.

   To then grant these identifiers to specific users, use an AUTHORIZE
   command in the form of GRANT /IDENTIFIER PEEK$INPUT_WATCHER J_JONES

   GREAT CARE SHOULD BE USED WHEN GRANTING THESE IDENTIFIERS SINCE THEY
   ALLOW THE WATCHING OF PASSWORDS AND OTHER NON-ECHOED INPUT.