WALL(1)                              BSD                               WALL(1)



NAME
     wall - write to all users

SYNOPSIS
     wall

DESCRIPTION
     wall reads its standard input until an end-of-file.  It then sends this
     message, preceded by "Broadcast Message ...", to users logged-in on the
     node from which you are writing.  The message appears in a pad on the
     transmitting node, as well as on the screen or output device of anyone
     logged onto the node via ttys or SIO lines.

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

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

FILES
     /dev/tty?
     /etc/utmp
     /dev/pty?
     /dev/sio?

SEE ALSO
     mesg(1), write(1)