Print the number of the active vt.
fgconsole [--help|--version|--next-available]
If the active Virtual Terminal is /dev/ttyN, then prints N on standard output.
If the console is a serial console, then "serial" is printed instead.
--next-available
Will show the next unallocated virtual terminal. Normally 6 virtual terminals are allocated, with number 7 used for X; this will return "8" in this case.
Under devfs, the consoles are in /dev/vc/N. devfsd may maintain symlinks for compatibility.