usage: /usr/bin/selabel_digest -b backend [-v] [-B] [-i] [-f file]

Where:
	-b  The backend - "file", "media", "x", "db" or "prop"
	-v  Run "cat <specfile_list> | openssl dgst -sha1 -hex"
	    on the list of specfiles to compare the SHA1 digests.
	-B  Use base specfiles only (valid for "-b file" only).
	-i  Do not request a digest.
	-f  Optional file containing the specs (defaults to
	    those used by loaded policy).