Compaq OSI/FTAM D43 - Manual (Page 48)

Compaq FTAM Responder Support of
ISO FTAM Functions
OSI/FTAM Responder Manual— 425199-001
4- 12
Kernel Group File Attributes
Filename Attribute
The filename attribute maps directly from the Compaq external file name to the FTAM
VFS, with the exception of specifying NBS-9 files. For an explanation of the
relationship between the filename attribute and NBS-9 files, see “NBS-9 Documents”
later in this subsection.
Permitted-Actions Attribute
The permitted-actions attribute is a fixed list that specifies the actions that can be
performed on an FTAM file. No Compaq file attribute corresponds to permitted-actions.
When a remote initiator creates an FTAM file in the Compaq VFS, the Compaq
responder always sets permitted-actions to fixed values. The fixed values selected
depend on document type, as listed in Table 4-8. Although the remote application can
specify permitted-actions in its file-create request, the values in Table 4-8 always
override these values.
Contents-Type Attribute
The contents-type attribute maps directly to Compaq file structures. Table 4-6, earlier in
this section, lists the Compaq file structures (including file type and file code) created
when you use the file-open service with any supported contents type except NBS-9.
Table 4-7 shows how the responder maps Compaq files to the FTAM contents type
when you open them with a contents-type value of unknown, or when you read the file
attributes of the Compaq file.
When you open an existing file to read it, you can specify as part of the contents-type
parameter a document type that is a simplification of the FTAM document type normally
expected for that file. Document types can be simplified to other document types with
simpler structures.
You can simplify document types only on read operations. This means that you must
issue a read request immediately after your open request. If you issue a write request
after an open request that requires a simplification, the responder returns a diagnostic
message.
Table 4-8. Actions Permitted for FTAM Document Type
FTAM
Document
Types
Permitted Actions
FTAM-1 Read, replace, extend, erase, read-attribute, change-
attribute, delete-file
FTAM-2 Read, insert, erase, read-attribute, change-attribute,
delete-file, traversal, reverse-traversal, random-
order
FTAM-3 Read, replace, extend, erase, read-attribute, change-
attribute, delete-file
NBS-9 Read, read-attribute