NAME
mesg — permit or deny messages to terminal
SYNOPSIS
mesg
[[-]
g]
[[-]
y]
[[-]
n]
mesg
DESCRIPTION
The command form
mesg
[-]
n
forbids messages via
write
by revoking write permission to users without appropriate privilege on the user's terminal (see
write(1)).
The command form
mesg
[-]
g
reinstates permission so that only legitimate commands (such as
write(1))
can be used by other users to send messages.
mesg
[-]
y
allows applications such as
write
or
talk
to send messages to the user's terminal (that is, without restrictions).
mesg
without any other argument reports the current state
without changing it.
RETURN VALUE
mesg
returns the following values:
- 0
Messages are receivable.
- 1
Messages are not receivable.
- 2
An error occurred.
EXTERNAL INFLUENCES
Environment Variables
LC_MESSAGES
determines the language in which messages are displayed.
If
LC_MESSAGES
is not specified in the environment or is set to
the empty string, the value of
LANG
is used as a default for each
unspecified or empty variable.
If
LANG
is not specified or is set to the empty string, a default of "C" (see
lang(5))
is used instead of
LANG.
If any internationalization variable contains an invalid setting,
mesg
behaves as if all internationalization variables are set to "C".
See
environ(5).
STANDARDS CONFORMANCE
mesg: SVID2, SVID3, XPG2, XPG3, XPG4
