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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | 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.
systemd(1),
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 2017-07-05. If you dis‐
cover 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 234 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)