wall(1M)                                                 wall(1M)



NAME
     wall - writes to all users

SYNOPSIS
     wall

DESCRIPTION
     wall reads its standard input until an end-of-file.  It then
     sends this message to all currently logged in users preceded
     by:

        Broadcast Message from ...

     It is used to warn all users, typically prior to shutting
     down the system.

     The sender must be the superuser to override any protections
     the users may have invoked (see mesg(1)).

EXAMPLES
     The command:

        wall

     will broadcast the standard input to all users who are not
     protected against receiving messages by the mesg command.

STATUS MESSAGES AND VALUES
     ``Cannot send to ...''  Occurs when the open on a user's tty
     file fails.

FILES
     /etc/wall
          Executable file
     /dev/tty*
          Files containing terminal information

SEE ALSO
     mesg(1), write(1) in A/UX Command Reference
















January 1992                                                    1