Most UNIX OS'es use "who -r" to show the current runlevel.
The "who" command that ships with Red Hat does not support
this option -- the command to determine the current runlevel
in Red Hat Linux is "runlevel".  "runlevel(8)" is not
mentioned in the init/telinit manpage, but "who(1)" is.
Either the init/telinit manpage should be changed to
reference "runlevel(8)" instead of "who(1)" or support for
the "-r" option should be added to "who" command.