Compaq OSI/FTAM D43 manual 17. Guardian Access Required to Perform FTAM Actions, FTAM VFS Action

Compaq FTAM Responder Support of	File-Access and Security Considerations
ISO FTAM Functions

password. For details on configuring a default user, refer to the OSI/FTAM Configuration and Management Manual.

The VFS actions allowed by the FTAM responder depend on the Guardian security (R W E P) for a file and the user ID for the association. For example, if you have Compaq purge access to a given file, the responder allows the FTAM delete-file action. Table 4-17 shows the Guardian access required for each FTAM VFS action.

Table 4-17. Guardian Access Required to Perform FTAM Actions

FTAM VFS Action	Guardian File Access	Guardian
	Required	Exclusion Mode
Read	READ	SHARED
Insert	WRITE	EXCLUSIVE
Replace	WRITE (READ also	EXCLUSIVE
	required for EDIT files)
Extend	WRITE (READ also	EXCLUSIVE
	required for EDIT files)
Erase	WRITE	EXCLUSIVE
Read attributes	None	SHARED
Change attributes	WRITE	EXCLUSIVE
Delete file	PURGE	EXCLUSIVE

Note. The Compaq EXECUTE access for a file has no bearing on FTAM access.

Refer to the Compaq File Utility Program (FUP) Reference Manual, the Compaq Enscribe Programmer’s Guide, and, if your files are Safeguard protected, the Compaq Safeguard Reference Manual for information about setting READ, WRITE, and PURGE access to a file.

Because the Compaq responder runs under the user ID for an association, Guardian security and Safeguard security are both enforced. The responder cannot translate Safeguard security attributes into the FTAM access-control attribute. Therefore, when a remote application reads the attributes of a file that the Safeguard software protects, the access-control attribute indicates that no value is available. However, the Safeguard software still protects FTAM access to the file. Note that for such a file, the read- attribute action does not tell you which file-access actions you may perform.

If a file-access request is rejected because the user ID does not meet the Guardian security requirements of the file, the responder sends a diagnostic message to the application, and also generates an EMS event message indicating a security violation on a file-access attempt.

Table 4-17 shows the exclusion mode that applies to each FTAM VFS action. Files open for read actions are open for SHARED access, allowing more than one user to open a file concurrently for reading. Files open for insert, replace, extend, and erase

OSI/FTAM Responder Manual—425199-001

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