Chmod/Chown is not atomic

[ihucos]

I had the problem, that this line:

unionfs-fuse/src/fuse_ops.c

Line 85 in 24b46b6

int res = lchown(p, uid, gid);

rightfully returns an error, but nevertheless apparently the file in a branch is created with the default owner/group, which effectively changes the file in the mounted filesystem.
Some debugging thoughts can be found here: #78
That may also happen in other places. It would also be interesting if there is a race condition.
One solution (that I think would require a bigger refactoring) is to first build the file for the write branch in a tmp directory and then rename it to the final destination instead of changing it "in place".