In some cases it is useful to specify the access mode/uid/gid for inodes we create without also enforcing them on existing inodes. Let's add a new flag for that: if the uid/gid/mode specificaitons are prefixed with ":", then they only apply to creation, not otherwise. This is specifically useful for provisioning SSH keys later. Those we'd like to provision like this: <snip> d /root :0700 root root - d /root/.ssh :0700 root root - f^ /root/.ssh/authorized_keys - - - - ssh.authorized_keys </snip> While /root/ + /root/.ssh/ being owned by root is pretty uncontroversial the access mode of /root/ and /root/.ssh/ might not be. Hence we should only have a default mode defined that is used when we create the dir, but not otherwise.
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