udev_new(3) — Linux manual page


UDEV_NEW(3)                     udev_new                     UDEV_NEW(3)

NAME         top

       udev_new, udev_ref, udev_unref - Create, acquire and release a
       udev context object

SYNOPSIS         top

       #include <libudev.h>

       struct udev *udev_new(void);

       struct udev *udev_ref(struct udev *udev);

       struct udev *udev_unref(struct udev *udev);

DESCRIPTION         top

       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         top

       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         top

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

SEE ALSO         top


COLOPHON         top

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       This page was obtained from the project's upstream Git repository
       ⟨https://github.com/systemd/systemd.git⟩ on 2023-12-22.  (At that
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systemd 255                                                  UDEV_NEW(3)

Pages that refer to this page: libudev(3)udev_device_get_syspath(3)udev_device_has_tag(3)udev_device_new_from_syspath(3)udev_enumerate_add_match_subsystem(3)udev_enumerate_new(3)udev_enumerate_scan_devices(3)udev_list_entry(3)udev_monitor_filter_update(3)udev_monitor_new_from_netlink(3)udev_monitor_receive_device(3)systemd.directives(7)systemd.index(7)