"chmod A-" does not work (ERROR: Operation not supported)
Observed on OpenIndiana 2019.05
The "chmod A-" command, which is used to removed ACLs (see "man chmod") does
not work. It stops with the following message:
ERROR: Operation not supported
This command used to work on Oracle Solaris 10.
cd /tmp touch abc getfacl abc # this works chmod A- abc ERROR: Operation not supported