I am trying to do this also... I have found structures in the ext2_fs.h header that define ACLs, but am not sure how they fit togeather with the inode. There is also a reserved inode number for "ACL list" I am wondering if there is a huge list of all ACLs on the fs? and can more than one file entry share the same ACL? I will look at the site that you mentiond and see if I can make it work... nice to see that I am not the only one who wants ACLs on Linux :)
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