[spidergawd]

Well, I think that shntool md5 (st5) and flac ffp are basically the same thing; md5 checksums of the uncompressed audio (rather than whole file).

Anyway, to do it with shntool:

shntool hash *.flac >showname.st5

or with metaflac:

metaflac --show-md5sum *flac >showmane.ffp

The metaflac method seems to just grab the ffp info from the file, rather than compute it, so it might be a good idea to write the script to do both and compare, or at least run

flac -t *flac

first to make sure the audio portion of the files haven't become corrupted.