System admins sometimes need to ensure that "long running" jobs
have completed before a reboot. To support this, #OracleSolaris 11.4.63 has added the ability for an authorized administrator to temporarily disable system reboot/halt by adding a new maintenance type to the existing 'sysadm maintain' subcommand.
Further information can be found in the updated versions of the halt(8), init(8), shutdown(8), and sysadm(8) man pages.