udev_new

systemd

udev_new

udev_ref

udev_unref

Create, acquire and release a udev context object

#include <libudev.h>

struct udev *

udev_new

void

struct udev *

udev_ref

struct udev *

udev

struct udev *

udev_unref

struct udev *

udev

Description

udev_new() allocates a new udev context object and returns a pointer to it. This object is opaque and must not be accessed by the caller via different means than functions provided by libudev. Initially, the reference count of the context is 1. You can acquire further references, and drop gained references via udev_ref() and udev_unref(). Once the reference count hits 0, the context object is destroyed and freed.

Return Value

On success, udev_new() returns a pointer to the allocated udev context. On failure, NULL is returned. udev_ref() returns the argument that it was passed, unmodified. udev_unref() always returns NULL.

History

udev_new(), udev_ref(), and udev_unref() were added in version 221.