wall(1)                             CLIX                             wall(1)



  NAME

    wall - Writes to all users

  SYNOPSIS

    /etc/wall

  DESCRIPTION

    The wall command writes a message to all users currently logged in to the
    system.  The wall command reads its stdin until an end-of-file character
    (the <Ctrl-D> sequence) is read.  It then sends the input as a message,
    preceded by the following, to all currently logged-in users:

    Broadcast Message from user (device) on sys_name date...

    The wall command is used to warn all users about such things as shutting
    down the system.

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

  EXAMPLES

    To send a message to all users logged onto the system, enter the
    following:

    $ /etc/wall
    The system is being shutdown.  Please log off.
    <Ctrl-D>


  FILES

    /dev/tty*  Controlling terminal interface.

  DIAGNOSTICS

    Cannot send to ...
           The open() on a user's tty file failed.

  EXIT VALUES

    The wall command exits with a nonzero value if an error occurs.

  RELATED INFORMATION

    Commands: mesg(1), write(1)





  2/94 - Intergraph Corporation                                              1