mesg(1) User Commands mesg(1)
mesg - permit or deny messages
mesg [-n | -y | n | y]
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 argu-
ments, mesg reports the current state without changing it. Processes
with appropriate privileges may be able to send messages to the termi-
nal independent of the current state.
The following options are supported:
-n|n Denies permission to other users to send message to the termi-
nal. See write(1).
-y|y Grants permission to other users to send messages to the ter-
See environ(5) for descriptions of the following environment variables
that affect the execution of mesg: LANG, LC_ALL, LC_CTYPE, LC_MESSAGES,
The following exit values are returned:
0 if messages are receivable.
1 if messages are not receivable.
2 on error.
/dev/tty* terminal devices
/dev/pts/* terminal devices
See attributes(5) for descriptions of the following attributes:
tab() allbox; cw(2.750000i)| cw(2.750000i) lw(2.750000i)|
lw(2.750000i). ATTRIBUTE TYPEATTRIBUTE VALUE AvailabilitySUNWcsu
talk(1), write(1), attributes(5), environ(5), standards(5)
SunOS 5.10 31 Oct 1997 mesg(1)