tag 20018 notabug thanks On 03/06/2015 11:28 AM, H0PE wrote: > Hi guys, > > > > I'm having hard timewith diffutils and I need your help. What I've done is: [Your mail is hard to read in plain text, due to missing spaces in various places. Writing html mail is frowned upon in technical lists, and doing the mail in plain text to begin with can avoid some embarrassment when the list automatically converts your html into plain text.] > > diff -n -a before.txtafter.txt >diff.txt This creates a binary diff in ed-script format. > Issues I got -and Ican't figure out-: > > 1.)How to get rid ofthe > characters from the beginning -so diffutil > wouldn't evenwrite it to there in the first place-? You don't. The output is correct for what you asked for. Rather, it sounds like you DON'T want to do a binary diff, but instead want to do a content-specific diff. That is, using diffutils is the wrong tool for what you appear to want. There are other tools, such as hivex (low-level) and virt-win-reg (built on top of hivex, which formats a hive file into a registry file), that are better equipped to read registry files _as structured data_, rather than diffutils' approach of a raw binary byte stream. Using tools like this can generate usable registry scripts that represent the difference between two hive files. For a demonstration, read Rich Jones' blog: https://rwmj.wordpress.com/2011/06/05/tip-using-a-backing-file-to-record-file-and-registry-changes-part-3/ > > 2.)I dont want toinclude diffutil difference notes to the file (e.g.: > 3424a3425,3429) Again, it sounds like you are using the wrong tool. > > 3.)Why diffutil addspaces after every damn character? I can't figure out how > to get rid of this-so diffutil wouldn't add a space after every character- That's because the hive format uses UTF-16 characters (where ASCII characters are represented by the two-byte sequence of the ASCII byte and a NUL byte, which your viewer is rendering as a space). When using diffutils to compare hive files, you are seeing raw UTF-16 streams, and NOT the typical registry files (which can be written in pure ASCII). As you have not demonstrated any bug in diffutils, I'm closing this bug report. Hopefully, by pointing you at higher level tools more suited to your task, I've helped you figure out the difference between binary diffs (diffutils' specialty) and structured diffs (hivex' specialty). Good luck, and feel free to ask more questions on the topic even though the bug is closed, although the answer on this list may merely be redirecting you over to the hivex list. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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