MESG(1) BSD Reference Manual MESG(1)
mesg - display (do not display) messages from other users
mesg [n | y]
The mesg utility is invoked by a users to control write access others
have to the terminal device associated with the standard error output.
Write access is allowed by default, and programs such as talk(1) and
write(1) may display messages on the terminal.
n Disallows messages.
y Permits messages to be displayed.
If no arguments are given, mesg displays the present message status to
the standard error output.
The mesg utility exits with one of the following values:
0 Messages are allowed.
1 Messages are not allowed.
An error has occurred.
biff(1), talk(1), write(1)
A mesg command appeared in Version 6 AT&T UNIX.
4.4BSD June 6, 1993 1