-----------------------------------------------------------------------------
aclmod - modify access control lists (ACLs)
-----------------------------------------------------------------------------

Usage:  aclmod [-hvfdOR] [-ic|-io] <acl-entry-list> file...

        Options:
                  -h     Print this help information
                  -v     Print version and copyright information
                  -f     Don't print error messages, fail silently
                  -d     Delete existing ACL before applying modifications
                  -O     Modify other_obj and any_other entries seperately
                  -R     Apply changes recursively
                  -ic    Modify initial container ACL
                         (default permissions for new directories created
                          in this directory)
                  -io    Modify initial object ACL
                         (default permissions for new files created in
                          this directory)

        Where:
                  <acl-entry-list> is a comma separated list of
                  ([ugoOa]+|[ug]:<name>)(+|-|=)([rwxcid]+|[ugoO]|[ug]:<name>)
                  or an absolute mode in chmod format (eg, 755)

        Examples:
                  aclmod ugo+rwx file
                  aclmod o+rx directory
                  aclmod u:fred=rw,g:friends+r file
                  aclmod -R g=g:friends,a+r directory
                  aclmod -O o=rw,O=r file