730b9c1e14
This adds two things: - A new switch --uuid is added to "udevadm trigger". If specified a random UUID is associated with the synthettic uevent and it is printed to stdout. It may then be used manually to match up uevents as they propagate through the system. - The UUID logic is now implicitly enabled if "udevadm trigger --settle" is used, in order to wait for precisely the uevents we actually trigger. Fallback support is kept for pre-4.13 kernels (where the requests for trigger uevents with uuids results in EINVAL).
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