For information on the Hierarchical File System (HFS) APIs, see the following:
The hierarchical file system (HFS) APIs include:
The HFS APIs and the functions they support are part of the i5/OS(R) program. These APIs provide applications with a single, consistent interface to the file systems registered with the hierarchical file system on your iSeries server. They automatically support the document library services (DLS) file system and the optical file system (QOPT), and they can also support user-written file systems.
With HFS APIs you can work with nonrelational data stored in objects, such as directories and files in existing file systems. You can also perform such tasks as creating and deleting directories and files, reading from and writing to files, and changing the directory entry attributes of files and directories.
The following diagram shows the relationship of the HFS APIs to your applications and to other file systems:
If you are working with the optical file system (QOPT), refer to Optical device programming. If you are not writing applications, but instead are creating or installing a new file system for other programmers to use with the HFS APIs, turn to User-Written File Systems and HFS.
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