# World process library

`sausage-spawn` starts WASI components through `sausage:process/host@0.1.0`.
It uses `wit-bindgen` 0.46.0 and the canonical `host/wit/process.wit`.
It adds no host interface.

```rust,no_run
use sausage_spawn::Command;
let status = Command::new("printenv").arg("FOO").env("FOO", "1").status()?;
assert_eq!(status, 0);
# Ok::<(), std::io::Error>(())
```

A command inherits the environment, cwd, and all three streams.
`Stdio::Pipe` exposes the generated WASI stream resource on `Child`.
`Stdio::Null` discards output or supplies EOF.
Drop piped stdin to supply EOF.
Drain both output pipes before `wait` to prevent a bounded-pipe deadlock.
`try_wait` returns the numeric status when the child finishes.
`kill` stops every process in the child's group through the process interface.
Use `Command::new_group` before spawn when the caller must survive a child kill.
`timeout` uses a separate child group.
Drop does not kill the child.

Run `nix develop -c nu userland/spawn/check-imports.nu` to inspect the release components.
The script keeps the complete WIT output and checks each import.