DI_PATH_PROP_LOOKUP_BYTES(3DEVINFO) Device Information Library Functions
NAME
di_path_prop_lookup_bytes, di_path_prop_lookup_int64s,
di_path_prop_lookup_ints, di_path_prop_lookup_strings - search for a path
property
SYNOPSIS
cc [
flag... ]
file...
-ldevinfo [
library... ]
#include <libdevinfo.h>
int di_path_prop_lookup_bytes(
di_path_t path,
const char *prop_name);
int di_path_prop_lookup_int64s(
di_path_t path,
const char *prop_name);
int di_path_prop_lookup_ints(
di_path_t path,
const char *prop_name,
char **prop_data);
int di_path_prop_lookup_strings(
di_path_t path,
const char *prop_name,
char **prop_data);
PARAMETERS
path The handle to a path node in a
di_init(3DEVINFO).
prop_name The name of property for which to search.
prop_data For
di_path_prop_lookup_bytes(), the address to a pointer to
an array of unsigned characters containing the property
data.
For
di_path_prop_lookup_int64(), the address to a pointer to
an array of 64-bit integers containing the property data.
For
di_path_prop_lookup_ints(), the address to a pointer to
an array of integers containing the property data.
For
di_path_prop_lookup_strings(), the address to a pointer
to a buffer containing a concatenation of null-terminated
strings containing the property data.
DESCRIPTION
These functions return the value of a known property name and type.
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.
Otherwise, -1 is returned and
errno is set to indicate the error.
ERRORS
These functions will fail if:
EINVAL One of the arguments is invalid.
ENOTSUP The snapshot contains no property information.
ENXIO The path property does not exist.
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 May 15, 2008
DI_PATH_PROP_LOOKUP_BYTES(3DEVINFO)