DI_PROM_PROP_DATA(3DEVINFO) Device Information Library Functions

NAME

di_prom_prop_data, di_prom_prop_next, di_prom_prop_name - access PROM
device information

SYNOPSIS

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

di_prom_prop_t di_prom_prop_next(di_prom_handle_t ph, di_node_t node,
di_prom_prop_t prom_prop);


char *di_prom_prop_name(di_prom_prop_t prom_prop);


int di_prom_prop_data(di_prom_prop_t prom_prop, uchar_t **prop_data);

PARAMETERS

node
Handle to a device node in the snapshot of kernel device
tree.


ph
PROM handle


prom_prop
Handle to a PROM property.


prop_data
Address of a pointer.

DESCRIPTION

The di_prom_prop_next() function obtains a handle to the next
property on the PROM property list associated with node. If prom_prop
is DI_PROM_PROP_NIL, the first property associated with node is
returned.


The di_prom_prop_name() function returns the name of the prom_prop
property.


The di_prom_prop_data() function returns the value of the prom_prop
property. The return value is a non-negative integer specifying the
size in number of bytes in prop_data.


All memory allocated by these functions is managed by the library and
must not be freed by the caller.

RETURN VALUES

The di_prom_prop_data() function returns the number of bytes in
prop_data and prop_data is updated to point to a byte array
containing the property value. If 0 is returned, the property is a
boolean property and the existence of this property indicates the
value is true.


The di_prom_prop_name() function returns a pointer to a string that
contains the name of prom_prop.


The di_prom_prop_next() function returns a handle to the next PROM
property. DI_PROM_PROP_NIL is returned if no additional properties
exist.

ERRORS

See openprom(4D) for a description of possible errors.

ATTRIBUTES

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


+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Evolving |
+--------------------+-----------------+
|MT-Level | Safe |
+--------------------+-----------------+

SEE ALSO

openprom(4D), attributes(7)


Writing Device Drivers

December 1, 1998 DI_PROM_PROP_DATA(3DEVINFO)