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19 lines
968 B
Markdown
19 lines
968 B
Markdown
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# Plan 9
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Plan9 is a linux process that hosts a plan9 filesystem server for WSL1 and WSL2 distributions. It's created by [init](init.md) in each distribution.
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## WSL 1
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In WSL1 distributions, `plan9` serves its filesystem through a unix socket, which can then be connected to from Windows.
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## WSL2
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In WSL2 distributions, `plan9` runs its filesystem through an `hvsocket`
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## Accessing the distribution files from Windows
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From Windows, a special redirector driver (p9rdr.sys) registers both `\\wsl$` and `\\wsl.localhost`. When either of those paths are accessed, `p9rdr.sys` calls [wslservice.exe](wslservice.exe.md) to list the available distributions for a given Windows users.
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When a distribution path is accessed (like `\\wsl.localhost\debian`), `p9rdr.sys` calls into [wslservice.exe](wslservice.exe.md) via COM to start the distribution, and connect to its plan9 server, which allows the files to be accessed from Windows.
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See `src/linux/init/plan9.cpp`
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