wall(1M)                         DG/UX 5.4.2                        wall(1M)


NAME
       wall - write to all users

SYNOPSIS
       /usr/sbin/wall

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

       Broadcast Message from ...

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

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

   International Features
       wall can send characters from supplementary codesets.

       wall uses the locale of the sender to determine printability.

FILES
       /dev/tty*

DIAGNOSTICS
       ``Cannot send to ...''
       when the open on a user's tty file fails.

SEE ALSO
       mesg(1), write(1).

























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