man/man3devinfo/di_walk_node.3devinfo

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 DI_WALK_NODE 3DEVINFO "Jan 16, 2009"
 NAME
di_walk_node - traverse libdevinfo device nodes
 SYNOPSIS

cc [ flag... ] file... -ldevinfo [ library... ]
#include <libdevinfo.h>

int di_walk_node(di_node_t root, uint_t flag, void *arg,
 int (*node_callback)(di_node_t node, void *arg));


 DESCRIPTION

The di_walk_node() function visits all nodes in the subtree rooted at
root. For each node found, the caller-supplied function
node_callback() is invoked. The return value of node_callback()
specifies subsequent walking behavior.
 PARAMETERS
arg

Pointer to caller-specific data.


flag

Specifies walking order, either DI_WALK_CLDFIRST (depth first) or
DI_WALK_SIBFIRST (breadth first). DI_WALK_CLDFIRST is the default.


node

The node being visited.


root

The handle to the root node of the subtree to visit.


 RETURN VALUES

Upon successful completion, di_walk_node() returns 0. Otherwise, -1
is returned and errno is set to indicate the error.

The node_callback() function can return one of the following:
DI_WALK_CONTINUE

Continue walking.


DI_WALK_PRUNESIB

Continue walking, but skip siblings and their child nodes.


DI_WALK_PRUNECHILD

Continue walking, but skip subtree rooted at current node.


DI_WALK_TERMINATE

Terminate the walk immediately.


 ERRORS

The di_walk_node() function will fail if:
EINVAL

Invalid argument.


 ATTRIBUTES

See attributes(7) for descriptions of the following attributes:


ATTRIBUTE TYPE ATTRIBUTE VALUE
Interface Stability Committed
MT-Level Safe


 SEE ALSO

 di_init (3DEVINFO),  libdevinfo (3LIB),  attributes (7)
Writing Device Drivers