mesg(1) - phpMan

MESG(1)                                   User Commands                                   MESG(1)

NAME
       mesg - display (or do not display) messages from other users

SYNOPSIS
       mesg [option] [n|y]

DESCRIPTION
       The  mesg utility is invoked by a user to control write access others have to the terminal
       device associated with standard error output.  If write access is allowed,  then  programs
       such as talk(1) and write(1) may display messages on the terminal.

       Traditionally,  write  access  is  allowed by default.  However, as users become more con-
       scious of various security risks, there is a trend to remove write access by  default,  at
       least  for  the primary login shell.  To make sure your ttys are set the way you want them
       to be set, mesg should be executed in your login scripts.

       The mesg utility silently exits with error status 2 if not executed on terminal.  In  this
       case  execute mesg is pointless.  The command line option --verbose forces mesg to print a
       warning in this situation.  This behaviour has been introduced in version 2.33.

ARGUMENTS
       n      Disallow messages.

       y      Allow messages to be displayed.

       If no arguments are given, mesg shows the current message status on standard error output.

OPTIONS
       -v, --verbose
              Explain what is being done.

       -V, --version
              Display version information and exit.

       -h, --help
              Display help text and exit.

EXIT STATUS
       The mesg utility exits with one of the following values:

            0     Messages are allowed.

            1     Messages are not allowed.

           >1     An error has occurred.

FILES
       /dev/[pt]ty[pq]?

SEE ALSO
       login(1), talk(1), write(1), wall(1), xterm(1)

HISTORY
       A mesg command appeared in Version 6 AT&T UNIX.

AVAILABILITY
       The mesg command is part of the util-linux package and is available from  https://www.ker-
       nel.org/pub/linux/utils/util-linux/.

util-linux                                  July 2014                                     MESG(1)

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