NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | HISTORY | SEE ALSO | COLOPHON |
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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),
This page is part of the systemd (systemd system and service
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⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩.
This page was obtained from the project's upstream Git repository
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(which is not part of the original manual page), send a mail to
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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)