usage: /usr/bin/selabel_lookup -b backend [-v] [-r] -k key [-t type] [-f file]

Where:
	-b  The backend - "file", "media", "x", "db" or "prop"
	-v  Validate entries against loaded policy.
	-r  Use "raw" function.
	-k  Lookup key - Depends on backend.
	-t  Lookup type - Optional as depends on backend.
	-f  Optional file containing the specs (defaults to
	    those used by loaded policy).

Examples:
	/usr/bin/selabel_lookup -v -b file -k /run -t 0
	   lookup with validation against the loaded policy, the
	   "file" backend for path "/run" with mode = 0
	/usr/bin/selabel_lookup -r -b x -t 4 -k X11:ButtonPress
	   lookup_raw the "X" backend for type SELABEL_X_EVENT
	   using key "X11:ButtonPress"