proot - 5.1.0-1.3 main

PRoot is a user-space implementation of chroot, mount --bind,
and binfmt_misc.
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This means that users don't need any privileges or setup to do things like
using an arbitrary directory as the new root filesystem, making files
accessible somewhere else in the filesystem hierarchy, or executing programs
built for another CPU architecture transparently through QEMU user-mode.
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Also, developers can add their own features or use PRoot as a Linux process
instrumentation engine thanks to its extension mechanism.
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Technically PRoot relies on ptrace, an unprivileged system-call available in
every Linux kernel.