<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div><br><div><div><br></div><div>On Oct 27, 2009, at 11:08 PM, Matt McCutchen wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>On Tue, 2009-10-27 at 23:38 -0400, Tony wrote:<br><blockquote type="cite">When rsync 3.0.6 copies files with HFS+ File Compression, the new <br></blockquote><blockquote type="cite">extended attribute decmpfs is not preserved, and the UF_COMPRESSED <br></blockquote><blockquote type="cite">flag is not set on the destination and the destination file is not <br></blockquote><blockquote type="cite">compressed.<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">I examined the destination file as described in ars technica (with ls <br></blockquote><blockquote type="cite">and xattr from a 10.5 Leopard boot), and the compressed data is moved <br></blockquote><blockquote type="cite">from the resource fork to the data fork, and the extended attributes <br></blockquote><blockquote type="cite">'@' are removed from the file.<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">As far as I know, only ditto in 10.6 can handle HFS+ File <br></blockquote><blockquote type="cite">Compression. (I even tested a 'clone' with disk utility (file copy, <br></blockquote><blockquote type="cite">not block), and it also failed (block copy, of course works).<br></blockquote><br>Rsync is just reading and writing files via the filesystem API; it has<br>no access to any of the flags or xattrs used to implement the<br>compression.<br><br>I guess the filesystem doesn't compress new files by default. If it had<br>an API to request compression, rsync could use that API when writing the<br>destination files. Unfortunately, the API ditto is using appears to be<br>private to Apple. See the post from brkirch beginning "The first thing<br>that I tried to do" on this page:<br><br><a href="http://www.macosxhints.com/article.php?story=20090902223042255">http://www.macosxhints.com/article.php?story=20090902223042255</a><br><br>So anyone interested in making rsync compress the destination files<br>would probably have to copy the relevant code from afsctool. This could<br>be shared as a patch; I feel quite sure it would not be adopted in the<br>main version of rsync.<br><br>-- <br>Matt<br><br>-- <br>Please use reply-all for most replies to avoid omitting the mailing list.<br>To unsubscribe or change options: https://lists.samba.org/mailman/listinfo/rsync<br>Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html<br></div></blockquote></div><br></div></div></body></html>