udev_hwdb

udev_hwdb — retrieve properties from the hardware database

Functions

Types and Values

struct udev_hwdb

Object Hierarchy


Description

Libudev hardware database interface.

Functions

udev_hwdb_ref ()

struct udev_hwdb *
udev_hwdb_ref (struct udev_hwdb *hwdb);

Take a reference of a hwdb context.

Parameters

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.

Parameters

hwdb

context

 

Returns

the passed hwdb context if it has still an active reference, or NULL otherwise.


udev_hwdb_new ()

struct udev_hwdb *
udev_hwdb_new (struct udev *udev);

Create a hardware database context to query properties for devices.

Parameters

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.

Parameters

hwdb

context

 

modalias

modalias string

 

flags

(unused)

 

Returns

a udev_list_entry.

Types and Values

struct udev_hwdb

struct udev_hwdb;

Opaque object representing the hardware database.