DI_PROM_PROP_LOOKUP_BYTES(3DEVINFO) Device Information Library Functions
NAME
di_prom_prop_lookup_bytes, di_prom_prop_lookup_ints,
di_prom_prop_lookup_strings - search for a PROM property
SYNOPSIS
cc [
flag... ]
file...
-ldevinfo [
library... ]
#include <libdevinfo.h>
int di_prom_prop_lookup_bytes(
di_prom_handle_t ph,
di_node_t node,
const char *prop_name,
uchar_t **prop_data);
int di_prom_prop_lookup_ints(
di_prom_handle_t ph,
di_node_t node,
const char *prop_name,
int **prop_data);
int di_prom_prop_lookup_strings(
di_prom_handle_t ph,
di_node_t node,
const char *prop_name,
char **prop_data);
PARAMETERS
node Handle to device node in snapshot created by
di_init(3DEVINFO).
ph Handle returned by
di_prom_init(3DEVINFO).
prop_data For
di_prom_prop_lookup_bytes(), the address of a pointer to
an array of unsigned characters.
For
di_prom_prop_lookup_ints(), the address of a pointer to
an integer.
For
di_prom_prop_lookup_strings(), the address of pointer to
a buffer.
prop_name The name of the property being searched.
DESCRIPTION
These functions return the value of a known
PROM property name and value
type and update the
prop_data pointer to reference memory that contains
the property value. All memory allocated by these functions is managed by
the library and must not be freed by the caller.
RETURN VALUES
If the property is found, the number of entries in
prop_data is returned.
If the property is a boolean type, 0 is returned and the existence of
this property indicates the value is true. Otherwise, -1 is returned and
errno is set to indicate the error.
For
di_prom_prop_lookup_bytes(), the number of entries is the number of
unsigned characters contained in the buffer pointed to by
prop_data.
For
di_prom_prop_lookup_ints(), the number of entries is the number of
integers contained in the buffer pointed to by
prop_data.
For
di_prom_prop_lookup_strings(), the number of entries is the number of
null-terminated strings contained in the buffer. The strings are stored
in a concatenated format in the buffer.
ERRORS
These functions will fail if::
EINVAL Invalid argument.
ENXIO The property does not exist.
ATTRIBUTES
See
attributes(7) for descriptions of the following attributes:
+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Evolving |
+--------------------+-----------------+
|MT-Level | Safe |
+--------------------+-----------------+
SEE ALSO
di_init(3DEVINFO),
di_prom_prop_next(3DEVINFO),
libdevinfo(3LIB),
openprom(4D),
attributes(7) Writing Device Drivers December 1, 1998
DI_PROM_PROP_LOOKUP_BYTES(3DEVINFO)