udev_device_get_syspath

systemd
Developer David Herrmann dh.herrmann@gmail.com
udev_device_get_syspath 3
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 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.

## See Also

udev_new 3, udev_device_new_from_syspath 3, udev_device_has_tag 3, udev_enumerate_new 3, udev_monitor_new_from_netlink 3, udev_list_entry 3, systemd 1,