MESG(1) User Commands MESG(1)

NAME

mesg - permit or deny messages

SYNOPSIS

mesg [-n | -y | n | y]

DESCRIPTION

The mesg utility will control whether other users are allowed to send
messages via write(1), talk(1), or other utilities to a terminal
device. The terminal device affected is determined by searching for
the first terminal in the sequence of devices associated with
standard input, standard output, and standard error, respectively.
With no arguments, mesg reports the current state without changing
it. Processes with appropriate privileges may be able to send
messages to the terminal independent of the current state.

OPTIONS

The following options are supported:

-n|n
Denies permission to other users to send message to the
terminal. See write(1).


-y|y
Grants permission to other users to send messages to the
terminal.

ENVIRONMENT VARIABLES

See environ(7) for descriptions of the following environment
variables that affect the execution of mesg: LANG, LC_ALL, LC_CTYPE,
LC_MESSAGES, and NLSPATH.

EXIT STATUS

The following exit values are returned:

0
if messages are receivable.


1
if messages are not receivable.


2
on error.

FILES

/dev/tty*
terminal devices


/dev/pts/*
terminal devices

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:


+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Standard |
+--------------------+-----------------+

SEE ALSO

talk(1), write(1), attributes(7), environ(7), standards(7)

October 31, 1997 MESG(1)