mesg --version (return code: 0)
mesg from util-linux 2.27.1
mesg --help (return code: 0)
Usage:
mesg [options] [y | n]
Control write access of other users to your terminal.
Options:
-v, --verbose explain what is being done
-h, --help display this help and exit
-V, --version output version information and exit
For more details see mesg(1).