udev_hwdb

udev_hwdb — retrieve properties from the hardware database

Synopsis

struct              udev_hwdb;
struct udev_hwdb *  udev_hwdb_ref                       (struct udev_hwdb *hwdb);
struct udev_hwdb *  udev_hwdb_unref                     (struct udev_hwdb *hwdb);
struct udev_hwdb *  udev_hwdb_new                       (struct udev *udev);
struct udev_list_entry * udev_hwdb_get_properties_list_entry
                                                        (struct udev_hwdb *hwdb,
                                                         const char *modalias,
                                                         unsigned int flags);

Description

Libudev hardware database interface.

Details

struct udev_hwdb

struct udev_hwdb;

Opaque object representing the hardware database.


udev_hwdb_ref ()

struct udev_hwdb *  udev_hwdb_ref                       (struct udev_hwdb *hwdb);

Take a reference of a hwdb context.

hwdb :

context

Returns :

the passed enumeration context

udev_hwdb_unref ()

struct udev_hwdb *  udev_hwdb_unref                     (struct udev_hwdb *hwdb);

Drop a reference of a hwdb context. If the refcount reaches zero, all resources of the hwdb context will be released.

hwdb :

context

Returns :

NULL

udev_hwdb_new ()

struct udev_hwdb *  udev_hwdb_new                       (struct udev *udev);

Create a hardware database context to query properties for devices.

udev :

udev library context

Returns :

a hwdb context.

udev_hwdb_get_properties_list_entry ()

struct udev_list_entry * udev_hwdb_get_properties_list_entry
                                                        (struct udev_hwdb *hwdb,
                                                         const char *modalias,
                                                         unsigned int flags);

Lookup a matching device in the hardware database. The lookup key is a modalias string, whose formats are defined for the Linux kernel modules. Examples are: pci:v00008086d00001C2D*, usb:v04F2pB221*. The first entry of a list of retrieved properties is returned.

hwdb :

context

modalias :

modalias string

flags :

(unused)

Returns :

a udev_list_entry.