How to compile Rsync with acl support on Cygwin

[Peter Olivia]

Problem: ------- For sometime now, I have wanted to be able to rsync ACLs of files on windows machines to a Linux server.  I never saw anyone post anything about how to make it work.  I tried, but I was never able to compile on Cygwin when I patched the source with the acls.diff patch.  ./configure would error out after displaying:   Checking whether to support ACLS... checking for acl_get_file in -lacl...  no checking for ACL support... no   This issue was referenced in this post, but I never saw a follow up or resolution: http://www.cygwin.com/ml/cygwin/2004-01/msg01329.html   Solution: ----------- Well I did some poking around the acls.diff patch and started examining the way cygwin implements ACLs to see what could be patched to make it work.  I found that cygwin ACLs are implemented using the Solaris implementation: http://www.ee.adfa.edu.au/staff/hrp/webDesignHelp/cygwin-ug-net-nochunks.html#OV-HI-PERM   Corinna Vinschen also mentioned that the cygwin ACLs were modeled using Solaris ACLs and to reference the sun documentation site for implementation http://sources.redhat.com/ml/cygwin/2001-06/msg01243.html   Seeing that the acls.diff patch already had all the code for doing Solaris ACLs, it struck me that maybe it might work for Cygwin.  I edited the acls.diff patch and it compiled (albeit with a few warnings).  I have since tested it using the 2.6.6 and 2.6.7 code successfully.  I was able to rsync acls intact to and from my Linux server.   Here is the only edit needed for acls.diff to work on Cygwin ----------------------------------------------------------------------------------- Edit the following line +               *solaris*) +                       AC_MSG_RESULT(Using solaris ACLs) +                       AC_DEFINE(HAVE_SOLARIS_ACLS, 1, [true if you have solaris ACLs])   to read : +               *solaris*|*cygwin*) +                       AC_MSG_RESULT(Using solaris ACLs) +                       AC_DEFINE(HAVE_SOLARIS_ACLS, 1, [true if you have solaris ACLs])   Open Issue ---------------- 1) The only issue I’ve seen so far with rsync is that setuid, setgid and sticky bits don’t get restored when restoring to windows with –-acls .  If you restore once with –acls and once more without, it restores both acls and setuid/setgid/sticky bits. 2) I also had to use the old way (autoconf and autoheader) with 2.6.7 as the ./prepare-source did not regenerate the configure file   Thought someone might want to test it out and merge the change into CVS.

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