https://github.com/cppcoffee/vfork-rs

vfork-rs is used in embedded low memory to run an external program.
https://github.com/cppcoffee/vfork-rs

embedded vfork

Last synced: about 1 month ago
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vfork-rs is used in embedded low memory to run an external program.

• Host: GitHub
• URL: https://github.com/cppcoffee/vfork-rs
• Owner: cppcoffee
• Created: 2023-09-24T05:26:12.000Z (over 1 year ago)
• Default Branch: main
• Last Pushed: 2023-09-24T09:08:46.000Z (over 1 year ago)
• Last Synced: 2024-04-25T17:05:36.108Z (9 months ago)
• Topics: embedded, vfork
• Language: Rust
• Homepage:
• Size: 11.7 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# vfork-rs

`vfork-rs` is used in embedded low memory to run an external program and read the stdout output.

Just like the name, the `vfork-rs` uses the linux `vfork` syscall. the `vfork` syscall is used to create new processes without copying the page tables of the parent process. 

## Notice

Used in linux only.

## Usage

```rust

use vfork::Command;

fn main() {

    let s = "hello, world!";

    let mut cmd = Command::new("/bin/echo")

        .arg(s)

        .spawn()

        .expect("failed to execute process");

    let status_code = cmd.wait().expect("failed to wait process");

    assert_eq!(0, status_code.code());

    let output = cmd.output().expect("failed to get output");

    assert_eq!(String::from_utf8_lossy(&output), s);

}

```

## Reference

[https://man7.org/linux/man-pages/man2/vfork.2.html](https://man7.org/linux/man-pages/man2/vfork.2.html)