For more information, see Using Your Assigned Administrative Rights in Securing Users and Processes in Oracle Solaris 11.4.
Command output is similar to the following:
$ prctl -n process.max-file-descriptor $$
process: 110453: -sh
NAME PRIVILEGE VALUE FLAG ACTION RECIPIENT
process.max-file-descriptor
basic 256 - deny 11731
privileged 65.5K - deny -
system 2.15G max deny