surma
57a47b069e
T8: sausage:process WIT (spawn, wait, kill), one store per process over the shared root, /proc/processes, /run, pipeline and cancellation groups, Exec. brush and 78 uutils commands; the shared cwd-init object sets the cwd from PWD and keeps numeric exit codes. The corpus matches native bash. T9: V8 (deno_core) runs pi-durable, pi-ai and chord; SQLite storage in <dir>/host/harness.sqlite (WAL, synchronous=FULL); file tools on the VFS, bash through Exec; resumes after SIGKILL.
32 lines
1.5 KiB
Markdown
32 lines
1.5 KiB
Markdown
# Shared WASI startup object
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This constructor adopts `PWD` before Rust calls `main`.
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The process table supplies `PWD` from the spawn request, not from the host environment.
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The constructor exits with status 1 if the directory does not exist.
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It preserves one `/` preopen and the whole-world view.
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Build the object before you build userland:
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```sh
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nix develop -c nu --no-config-file userland/cwd-init/build.nu
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```
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Run workspace Cargo commands from `userland/` so Cargo loads `.cargo/config.toml`.
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Its rustflags request the startup object.
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The linker wrapper resolves the object path independently of each crate's directory.
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The builder must use the same rustflags, wrapper, and object for agent programs.
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The object also replaces libc's success/failure exit conversion with standard `wasi:cli/exit.exit-with-code`.
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Rust std on this toolchain does not use that interface directly.
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The host registers this gated standard function.
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The linker places the object before libc to resolve `_Exit` and `_exit`.
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Numeric exit codes use the usual low eight bits.
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`probe/` uses normal Rust APIs without startup code.
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It reads relative and absolute files or calls `std::process::exit` with its first argument.
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The standard `initial-cwd` import is preferable to `PWD`.
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The current Rust component does not declare that import.
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An upstream wasi-libc fix must declare it in the component type and initialize the local cwd before main.
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The fix must initialize cwd even when the linker omits `chdir` from program code.
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