|
HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
|
|
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | HISTORY | SEE ALSO | COLOPHON |
|
|
|
UDEV_NEW(3) udev_new UDEV_NEW(3)
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);
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.
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.
udev_new(), udev_ref(), and udev_unref() were added in version
221.
systemd(1), systemd-udevd.service(8)
This page is part of the systemd (systemd system and service
manager) project. Information about the project can be found at
⟨http://www.freedesktop.org/wiki/Software/systemd⟩. If you have a
bug report for this manual page, see
⟨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 2025-08-11. (At that
time, the date of the most recent commit that was found in the
repository was 2025-08-11.) If you discover any rendering
problems in this HTML version of the page, or you believe there is
a better or more up-to-date source for the page, or you have
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 258~rc2 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)
|
HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
|