wall(1M)                         DG/UX R4.11                        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 have appropriate privilege to override any
       protections the users may have invoked (see mesg(1)).  On a generic
       DG/UX system, appropriate privilege is granted by having an effective
       UID of 0 (root).  See the appropriateprivilege(5) man page for more
       information.

       On a system with DG/UX information security, appropriate privilege is
       granted by having one or more specific capabilities enabled in the
       effective capability set of the user.  See the capdefaults(5) man
       page for more information.

   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)i, appropriateprivilege(5).


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