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# memfd
[](https://travis-ci.org/lucab/memfd-rs)
[](https://crates.io/crates/memfd)
[](https://docs.rs/memfd)
A pure-Rust library to work with Linux memfd and seals.
It provides support for creating `memfd` objects on Linux
and handling seals on them. This was first introduced in
Linux kernel 3.17.
For further details, see `memfd_create(2)` manpage.
## Example
```rust
extern crate memfd;
use memfd::errors::Result;
fn new_sized_memfd() -> Result<memfd::Memfd> {
// Create a sealable memfd.
let opts = memfd::MemfdOptions::default().allow_sealing(true);
let mfd = opts.create("sized-1K")?;
// Resize to 1024B.
mfd.as_file().set_len(1024)?;
// Add seals to prevent further resizing.
let mut seals = memfd::SealsHashSet::new();
seals.insert(memfd::FileSeal::SealShrink);
seals.insert(memfd::FileSeal::SealGrow);
mfd.add_seals(&seals)?;
// Prevent further sealing changes.
mfd.add_seal(memfd::FileSeal::SealSeal);
Ok(mfd)
}
```
Some more examples are available under [examples](examples).
## License
Licensed under either of
* MIT license - <http://opensource.org/licenses/MIT>
* Apache License, Version 2.0 - <http://www.apache.org/licenses/LICENSE-2.0>
at your option.
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