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Add README section about nesting

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Elara 2023-10-24 13:51:52 -07:00
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@ -10,7 +10,11 @@ Fakeroot is a utility that runs commands in an environment where they appear to
### How is this library different? ### How is this library different?
Instead of injecting custom libc functions, this library uses the Linux kernel's built-in isolation features to make a sort of container where the user is root. That means even programs that don't use libc (such as Go programs), or programs with a statically-linked libc, will believe they're running as root. However, this approach will only work on Linux kernels new enough (3.8+) and on distros that don't disable this functionality. Most modern Linux systems support it though, so it should work in most cases. Instead of injecting custom libc functions, this library uses the Linux kernel's built-in isolation features to make a sort of container where the user is root. That means even programs that don't use libc (such as Go programs), or programs with a statically-linked libc, will believe they're running as root.
You can also nest this type of fakeroot up to 32 times, unlike the original libc-based one, which doesn't support nesting at all.
However, this approach will only work on Linux kernels new enough (3.8+) and on distros that don't disable this functionality. Most modern Linux systems support it though, so it should work in most cases.
### Why? ### Why?