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Mike Hibler authored
The -S (sanity check) option adds the ability to do the obvious: validate an image file using its signature. So what did imagehash do all these years? Well, its primary job was to generate a signature file that imagezip could use to generate a delta. Secondarily, it would compare a signature vs. a dis with an image loaded on it. But now we use imagezip to gen most signatures while generating the image itself. Also added -X (xtreme hack) option to have imagehash attempt to check or generate signature file entries in a way that is consistent with what imagezip does. The difference is that imagezip can produce hashes for blocks that span chunk boundaries, imagehash (previously) never did this. So when validating an image whose signature was generated by imagezip: imagehash -SX foo.ndz To generate a new signature for an image: imagehash -cX foo.ndz
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