We seem to have no tool to verify udev rule files. There is a simple udev rules syntax checker in the tree, test/rule-syntax-check.py, but it is too simple to detect less trivial issues not detected by udev, e.g. redundant comparisons (#26593) or labels without references. Such a tool would be beneficial not only for maintaining udev rules distributed along with udev, but also and even more so for maintaining third party udev rules that are more likely to have issues with syntax and semantic correctness. Implement a udev rules syntax and semantics checker in the form of 'udevadm verify [OPTIONS] FILE...' command that is based on udev_rules_parse_file() interface and would apply further checks on top of it in subsequent commits. Resolves: #26606
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