udev_new(3) — Linux manual page

UDEV_NEW(3)                     udev_new                     UDEV_NEW(3)

NAME

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

SYNOPSIS

       #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.

SEE ALSO

       systemd(1),

COLOPHON

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       manager) project.  Information about the project can be found at
       ⟨http://www.freedesktop.org/wiki/Software/systemd⟩.  If you have
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       ⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩.
       This page was obtained from the project's upstream Git repository
       ⟨https://github.com/systemd/systemd.git⟩ on 2024-06-14.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2024-06-13.)  If you discover any rendering
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       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to
       man-pages@man7.org

systemd 257~devel                                            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)

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