This is supported on WASI only.
Expand description
Platform-specific extensions to std
for the WebAssembly System Interface (WASI).
Provides access to platform-level information on WASI, and exposes
WASI-specific functions that would otherwise be inappropriate as
part of the core std
library.
It exposes more ways to deal with platform-specific strings (OsStr
,
OsString
), allows to set permissions more granularly, extract low-level
file descriptors from files and sockets, and has platform-specific helpers
for spawning processes.
Examples
use std::fs::File;
use std::os::wasi::prelude::*;
fn main() -> std::io::Result<()> {
let f = File::create("foo.txt")?;
let fd = f.as_raw_fd();
// use fd with native WASI bindings
Ok(())
}
Run