fd-lock

Advisory cross-platform file locks using file descriptors. Adapted from mafintosh/fd-lock.

Note that advisory lock compliance is opt-in, and can freely be ignored by other parties. This means this crate should never be used for security purposes, but solely to coordinate file access.

• Documentation
• Crates.io
• Releases

Examples

Basic usage

use std::io::prelude::*;
use std::fs::File;
use fd_lock::RwLock;

// Lock a file and write to it.
let mut f = RwLock::new(File::open("foo.txt")?);
write!(f.write()?, "chashu cat")?;

// A lock can also be held across multiple operations.
let mut f = f.write()?;
write!(f, "nori cat")?;
write!(f, "bird!")?;

Installation

$ cargo add fd-lock

Safety

This crate uses unsafe on Windows to interface with windows-sys. All invariants have been carefully checked, and are manually enforced.

Contributing

Want to join us? Check out our "Contributing" guide and take a look at some of these issues:

• Issues labeled "good first issue"
• Issues labeled "help wanted"

References

• LockFile function - WDC
• flock(2) - Linux Man Page
• rustix::fs::flock
• windows_sys::Win32::Storage::FileSystem::LockFile

License

MIT OR Apache-2.0