udev_device_get_syspath

systemd

udev_device_get_sysname

udev_device_get_sysnum

udev_device_get_devpath

udev_device_get_devnode

udev_device_get_devnum

udev_device_get_devtype

udev_device_get_subsystem

udev_device_get_driver

udev_device_get_udev

udev_device_get_parent

udev_device_get_parent_with_subsystem_devtype

udev_device_get_is_initialized

udev_device_get_action

Query device properties

#include <libudev.h>

const char *

udev_device_get_syspath

struct udev_device *

udev_device

const char *

udev_device_get_sysname

struct udev_device *

udev_device

const char *

udev_device_get_sysnum

struct udev_device *

udev_device

const char *

udev_device_get_devpath

struct udev_device *

udev_device

const char *

udev_device_get_devnode

struct udev_device *

udev_device

dev_t

udev_device_get_devnum

struct udev_device *

udev_device

const char *

udev_device_get_devtype

struct udev_device *

udev_device

const char *

udev_device_get_subsystem

struct udev_device *

udev_device

const char *

udev_device_get_driver

struct udev_device *

udev_device

struct udev *

udev_device_get_udev

struct udev_device *

udev_device

struct udev_device *

udev_device_get_parent

struct udev_device *

udev_device

struct udev_device *

udev_device_get_parent_with_subsystem_devtype

struct udev_device *

udev_device

const char *

subsystem

const char *

devtype

int

udev_device_get_is_initialized

struct udev_device *

udev_device

const char *

udev_device_get_action

struct udev_device *

udev_device

Return Value

On success, udev_device_get_syspath(), udev_device_get_sysname(), udev_device_get_sysnum(), udev_device_get_devpath(), udev_device_get_devnode(), udev_device_get_devtype(), udev_device_get_subsystem(), udev_device_get_driver() and udev_device_get_action() return a pointer to a constant string that describes the requested property. The lifetime of this string is bound to the device it was requested on. On failure, each function may return NULL.

On success, udev_device_get_devnum() returns the device type of the passed device. On failure, a device type with minor and major number set to 0 is returned.

udev_device_get_udev() always returns a valid pointer to the udev context that this device belongs to.

On success, udev_device_get_parent() and udev_device_get_parent_with_subsystem_devtype() return a pointer to the parent device. No additional reference to this device is acquired, but the child device owns a reference to such a parent device. On failure, NULL is returned.

On success, udev_device_get_is_initialized() returns either 1 or 0, depending on whether the passed device has already been initialized by udev or not. On failure, a negative error code is returned. Note that devices for which no udev rules are defined are never reported initialized.

History

udev_device_get_syspath(), udev_device_get_sysname(), udev_device_get_sysnum(), udev_device_get_devpath(), udev_device_get_devnode(), udev_device_get_devnum(), udev_device_get_devtype(), udev_device_get_subsystem(), udev_device_get_driver(), udev_device_get_udev(), udev_device_get_parent(), udev_device_get_parent_with_subsystem_devtype(), udev_device_get_is_initialized(), and udev_device_get_action() were added in version 221.