The GRPNAM privilege lets the user's process
bypass discretionary access controls on the system logical name table
in order to insert names into (and delete names from) the logical
name table of the group to which the process belongs by the use of
the Create Logical Name ($CRELNM) and Delete Logical Name ($DELLNM)
In addition, the privileged process can issue
the DCL commands ASSIGN and DEFINE to add names to the group logical
name table and the DCL command DEASSIGN to delete names from the table.
The privilege allows the use of the /GROUP qualifier with the DCL
commands MOUNT and DISMOUNT (as well as the system services $MOUNT
and $DISMOUNT) when sharing volumes among group members.
Do not grant this privilege to all users of the
system because it allows the user's process to create an unlimited
number of group logical names. When unqualified users have the unrestricted
ability to create group logical names, excessive use of system dynamic
memory can degrade system performance. In addition, a process with
the GRPNAM privilege can interfere with the activities of other processes
in the same group by creating definitions of commonly used logical
names such as SYS$SYSTEM.