HP-UX Reference (11i v2 07/12) - 4 File Formats (vol 8)

inode_vxfs(4) inode_vxfs(4)

length up to a 4 byte boundary.

format The format of the data layout of the remainder of the attribute

record. Each attribute consists of a class identifying the attribute’s

administrative domain, a subclass identifying the attribute within

the administrative domain, and data. The valid record formats are:

ATTR_EXTIMMED

Extends the immediate data area so that ﬁles larger than 96

bytes can be stored directly in the inode.

ATTR_IMMED

The attribute is stored directly in the inode. The ﬁelds in the

rest of this record are:

class The class of the attribute.

subclass The subclass of the attribute.

data The attribute data.

ATTR_DIRECT

When attributes are too large to store directly in the inode,

each attribute is stored in its own ﬁle. ATTR_DIRECT lists

each attribute along with the inode number corresponding to

the ﬁle in which the attribute is stored. The number of entries

in the list is determined by the length of the record. The ﬁelds

in each entry are:

class The class of the attribute.

subclass The subclass of the attribute.

length The length of the attribute data. This allows attri-

bute operations to check the length of an attribute

without reading the attribute inode.

inumber The inode number of the ﬁle containing the attri-

bute data. The inode is part of the attribute ﬁleset.

The attribute records in the inode terminate with a record that has a format of

zero (for compatibility with ﬁle systems that have the last 80 bytes of all

inodes set to NULL).