di_prop_bytes(3DEVINFDevice Information Library Functiodi_prop_bytes(3DEVINFO)NAME
di_prop_bytes, di_prop_devt, di_prop_ints, di_prop_name,
di_prop_strings, di_prop_type, di_prop_int64 - access property values
and attributes
SYNOPSIS
cc [ flag... ] file... -ldevinfo [ library... ]
#include <libdevinfo.h>
int di_prop_bytes(di_prop_t prop, uchar_t **prop_data);
dev_t di_prop_devt(di_prop_t prop);
int di_prop_ints(di_prop_t prop, int **prop_data);
int di_prop_int64(di_prop_t prop, int64_t **prop_data);
char *di_prop_name(di_prop_t prop);
int di_prop_strings(di_prop_t prop, char **prop_data);
int di_prop_type(di_prop_t prop);
PARAMETERS
prop Handle to a property returned by di_prop_next(3DEV‐
INFO).
prop_data For di_prop_bytes(), the address of a pointer to an
unsigned character.
For di_prop_ints(), the address of a pointer to an
integer.
For di_prop_int64(), the address of a pointer to a
64-bit integer.
For di_prop_strings(), the address of pointer to a
character.
DESCRIPTION
These functions access information associated with property values and
attributes. All memory allocated by these functions is managed by the
library and must not be freed by the caller.
The di_prop_bytes() function returns the property data as a series of
unsigned characters.
The di_prop_devt() function returns the dev_t with which this property
is associated. If the value is DDI_DEV_T_NONE, the property is not
associated with any specific minor node.
The di_prop_ints() function returns the property data as a series of
integers.
The di_prop_int64() function returns the property data as a series of
64-bit integers.
The di_prop_name() function returns the name of the property.
The di_prop_strings() function returns the property data as a concate‐
nation of null-terminated strings.
The di_prop_type() function returns the type of the property. The type
determines the appropriate interface to access property values. The
following is a list of possible types:
DI_PROP_TYPE_BOOLEAN There is no interface to call since
there is no property data associated
with boolean properties. The existence
of the property defines a TRUE value.
DI_PROP_TYPE_INT Use di_prop_ints() to access property
data.
DI_PROP_TYPE_INT64 Use di_prop_int64() to access property
data.
DI_PROP_TYPE_STRING Use di_prop_strings() to access prop‐
erty data.
DI_PROP_TYPE_BYTE Use di_prop_bytes() to access property
data.
DI_PROP_TYPE_UNKNOWN Use di_prop_bytes() to access property
data. Since the type of property is
unknown, the caller is responsible for
interpreting the contents of the data.
DI_PROP_TYPE_UNDEF_IT The property has been undefined by the
driver. No property data is available.
RETURN VALUES
Upon successful completion, di_prop_bytes(), di_prop_ints(),
di_prop_int64(), and di_prop_strings() return a non-negative value,
indicating the number of entries in the property value buffer. See
di_prom_prop_lookup_bytes(3DEVINFO) for a description of the return
values. Otherwise, -1 is returned and errno is set to indicate the
error.
The di_prop_devt() function returns the dev_t value associated with the
property.
The di_prop_name() function returns a pointer to a string containing
the name of the property.
The di_prop_type() function can return one of types described in the
DESCRIPTION section.
ERRORS
These functions will fail if:
EINVAL Invalid argument. For example, the property type does
not match the interface.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │Evolving │
├─────────────────────────────┼─────────────────────────────┤
│MT-Level │Safe │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOdi_prom_prop_lookup_bytes(3DEVINFO), di_prop_next(3DEVINFO), libdev‐
info(3LIB), attributes(5)
Writing Device Drivers
SunOS 5.10 27 Mar 2001 di_prop_bytes(3DEVINFO)