On success, udev_device_get_syspath(), udev_device_get_sysname(),
udev_device_get_subsystem(), udev_device_get_driver() and
udev_device_get_action() return a pointer to a constant string that
describes the requested property. The lifetime of this string is
bound to the device it was requested on. On failure, each function
may return NULL.
On success, udev_device_get_devnum() returns the device type of the
passed device. On failure, a device type with minor and major number
set to 0 is returned.
udev_device_get_udev() always returns a valid pointer to the udev
context that this device belongs to.
On success, udev_device_get_parent() and
udev_device_get_parent_with_subsystem_devtype() return a pointer to
the parent device. No additional reference to this device is
acquired, but the child device owns a reference to such a parent
device. On failure, NULL is returned.
On success, udev_device_get_is_initialized() returns either 1 or 0,
depending on whether the passed device has already been initialized
by udev or not. On failure, a negative error code is returned. Note
that devices for which no udev rules are defined are never reported
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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
page was obtained from the project's upstream Git repository
⟨https://github.com/systemd/systemd.git⟩ on 2017-03-13. If you dis‐
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believe there is a better or more up-to-date source for the page, or
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COLOPHON (which is not part of the original manual page), send a mail
systemd 233 UDEV_DEVICE_GET_SYSPATH(3)