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In reply to Comment by Reader Richard Yao

Andrew Ayer on 2014-07-16 at 00:13:

As another commenter pointed out, Linux, as do many Unixes, has chroot(). If you're going to start a program's execution from inside a chroot, it makes sense to set up a basic directory structure. However, a very common privilege separation technique is to start execution outside the jail, open all the resources you need, and then chroot into a completely empty unwritable directory. OpenSSL has the API to make this work (as do other crypto libraries such as libsodium); LibreSSL does not.

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