The picl_walk_tree_by_class() function visits all the nodes of the subtree under the node specified by rooth. The PICL class name of the visited node is compared with the class name specified by classname. If the class names match, then the callback function specified by callback is called with the matching node handle and the argument provided in c_args. If the class name specified in classname is NULL, then the callback function is invoked for all the nodes.

The return value from the callback function is used to determine whether to continue or terminate the tree walk. The callback function returns PICL_WALK_CONTINUE or PICL_WALK_TERMINATE to continue or terminate the tree walk.

Upon successful completion, 0 is returned. On failure, a non-negative integer is returned to indicate an error.

PICL_STALEHANDLE is returned if the handle is no longer valid. This occurs if the PICL tree was refreshed or reinitialized.

PICL_INVALIDHANDLE is returned if the specified handle never existed. This error may be returned for a previously valid handle if the daemon was brought down and restarted. When this occurs a client must revalidate any saved handles.

PICL_NOTINITIALIZED

Session not initialized

PICL_NORESPONSE

Daemon not responding

PICL_NOTNODE

Not a node

PICL_INVALIDHANDLE

Invalid handle specified

PICL_STALEHANDLE

Stale handle specified

PICL_FAILURE

General system failure

See attributes(5) for descriptions of the following attributes:

picl_get_propval_by_name(3PICL), attributes(5)