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- .th WALL VIII 4/10/75
- .sh NAME
- wall \*- write to all users
- .sh SYNOPSIS
- .bd /etc/wall
- .sh DESCRIPTION
- .it 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 ...''.
- It is used to warn all users,
- typically prior to shutting down the system.
- .s3
- The sender should be super-user to override
- any protections the users may have invoked.
- .sh FILES
- /dev/tty?
- .sh "SEE ALSO"
- mesg (I), write (I)
- .sh DIAGNOSTICS
- ``Cannot send to ...'' when the open on
- a user's tty file fails.
- .sh BUGS
-