Safeguard Reference Manual (G06.24+, H06.03+ )

Disk Volume and Subvolume Security Commands
Safeguard Reference Manual—520618-013
9-2
Subvolume Authorization Record Ownership
can always be specified for all volumes protected by the Safeguard software. With an
ACL in effect, the OWNER authority is always included whenever the * (asterisk)
authority code is used. It can also be abbreviated as O.
With the Safeguard software, the owner of a volume can also be defined as a network
user. A network user who owns a protected volume can use the Safeguard software
from a remote node to control access to that volume (provided the user has remote
passwords set up between the two systems).
For more information about OWNER, see VOLUME on page 12-2.
Subvolume Authorization Record Ownership
The rules governing subvolume authorization record ownership are nearly identical to
those governing volume ownership. The only exception is that although only a local
super group user can add an authorization record for a volume (by default), any local
user can add an authorization record for a subvolume. For more information about
controlling this class of objects, see OBJECTTYPE SUBVOLUME in Section 12.
Volume and Subvolume Access Authorities
ACLs for disk volumes and subvolumes can grant the following six access authorities:
Volume and Subvolume Access Authorization
When a user attempts to create or access a disk file, the Safeguard software performs
a series of authorization checks to determine whether to allow the user to create or
access the file on the specified volume or subvolume. The following paragraphs
describe the authorization checking performed by the Safeguard software.
For any attempt to create or access a disk file, the Safeguard software checks the
requester’s authority as follows:
CREATE Create a disk file on a volume or subvolume
OWNER Change the authorization records
READ Read disk files within the volume or subvolume
WRITE Write disk files within the volume or subvolume
EXECUTE Execute disk files within the volume or subvolume
PURGE Purge disk files within the volume or subvolume
Note. READ, WRITE, EXECUTE, and PURGE access for a volume or subvolume are
consulted only when the Safeguard global configuration attribute CHECK-VOLUME or CHECK-
SUBVOLUME is turned on. If the option is turned off, only CREATE and OWNER are
applicable. For more information about the global configuration attributes, see Section 16,
Safeguard Subsystem Commands.