Veritas™ File System 5.0.1 Programmer's Reference Guide

API library interfaces

The API library interfaces highlighted in this SDK are the vxfsutil library and

VxFS IOCTL directives. The library contains a collection of API calls that

applications can use to take advantage of the features of the VxFS file system.

Manual pages are available for all of the API interfaces.

Table 1-1 describes the API calls and features available in the VxFS API library.

Table 1-1

Library APIs and features

FeatureAPIs

Inode-to-path lookupinotopath

Named Data Streamnattr

File Change LogFCL

Multi-volume supportMVS

IOCTL directivesCaching

Advisories

IOCTL directivesExtents

IOCTL directivesFreeze/Thaw

The VxFS API library, vxfsutil, can be installed independent of the Veritas File

System product. This library is implemented using a stubs library and dynamic

library combination. Applications are compiled with the stubs library

libvxfsutil.a, making the application portable to any VxFS target environment.

The application can then be run on a VxFS target, and the stubs library finds the

dynamic library that is provided with the VxFS target.

The stubs library uses a default path for the location of the vxfsutil.so dynamic

library. In most cases, the default path should be used. However, the default path

can be overridden by setting the environment variable, LIBVXFSUTIL_DLL_PATH,

to the path of the vxfsutil.so library. This structure allows an application to be

deployed with minimal issues related to compatibility with other releases of VxFS.

File Change Log

The VxFS File Change Log (FCL) tracks changes to files and directories in a file

system. Applications such as backup products, Web crawlers, search and indexing

engines, and replication software that typically scan an entire file system searching

for modifications since a previous scan can use the File Change Log.

Veritas File System software developer’s kit

File System software developer’s kit features