WALL(C)                  XENIX System V                   WALL(C)



     Name
          wall - Writes to all users.

     Syntax
          /etc/wall

     Description
          wall reads a message from the standard input until an end-
          of-file.  It then sends this message to all users currently
          logged in preceded by ``Broadcast Message from ...''.  wall
          is used to warn all users, for example, prior to shutting
          down the system.

          The sender should be super-user to override any protections
          the users may have invoked.

     Files
          /dev/tty*

     See Also
          mesg(C), write(C)

     Diagnostics
          Cannot send to ...  The open on a user's tty file has
                              failed.






























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