FTAM/9000 User's Guide

Chapter 5 75
FTAM File Protection
Concepts of FTAM File Protection
Concepts of FTAM File Protection
As noted before, there are two related concepts in FTAM file protection:
access control, and concurrency control. Access control governs the
actions that are permitted on a file, granting different users different
subsets of the available actions. Concurrency control governs whether
and how multiple users can access the file. Concurrency control is
applied independently to each action, as will be described later.
All the following controls and passwords are set (or satisfied) by using an
“action/concurrency string” as an argument in an FTAM command.
These are discussed later in this chapter.
Access Control
The following example illustrates the concepts involved in FTAM access
control.
$ fls -a donald@chicago:/users/donald/earlydata
Filename:
/users/donald/earlydata Permissions:
R-PXEACD--- File type: text (FTAM-1)
Storage account: no value available
File creation: no value available
Last file modification: Jan 12 19:49
Last read: Jan 18 15:36
Last attribute modification: no value available
Identity of creator: donald
Identity of modifier: no value available
Identity of reader: no value available
Identity of attribute modifier: no value available
File availability: immediate availability
Filesize: 1100 Access
Control: other
R------- group R--X-A--
user R-PXEACD Legal qualification: no value
available
Examine the italicized line labelled Permissions. The permissions stated
on that line are the only actions that anyone can perform on the file.
Notice that the “I” permission is missing; this means that no one has or
can be given Insert permission for this file.
1
1. Actually, the Insert action does not apply to FTAM-1 files.