libproc-rs

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A rust library for getting information about running processes for Mac and Linux

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# libproc-rs

This is a library for getting information about running processes for Mac OS X and Linux.

Add it to your project's `Cargo.toml`:

```toml
libproc = "0.14.11"
```

And then use it in your code:

```rust
use libproc::libproc::proc_pid;

match proc_pid::pidpath(pid) {
Ok(path) => println ! ("PID {}: has path {}", pid, path),
Err(err) => writeln ! ( & mut std::io::stderr(), "Error: {}", err).unwrap()
}
```

You can find the latest published release on [crates.io](https://crates.io/crates/libproc)

You can find the browseable docs for the latest release on [docs.rs](https://docs.rs/libproc/latest/libproc/).

NOTE: `master` branch (code and docs) can differ from those docs prior to a new release.

# Minimum rust version

The minimum rust version required, by versions:

* libproc-rs: 0.14.6 --> 1.74.1
* libproc-rs: 0.14.7 --> 1.72.0
* libproc-rs: 0.14.11 --> 1.72.0
* libproc-rs: Next --> 1.85.0

This is tested in CI and must pass.

# Test Matrix

The GitHub Actions CI test `libproc-rs` on :

rust versions:

* `stable` (must pass)
* `beta` (must pass)
* `1.72.0` (currently the minimum rust version supported) (must pass)
* `nightly` (allowed to fail)

on the following platforms:

* `ubuntu-latest`
* `macos-12` (Monterey) (Intel)
* `macos-13` (Ventura) (Intel)
* `macos-14` (Sonoma) (Arm64)

# Examples

Two simple examples are included to show libproc-rs working.

- `procinfo` that takes a PID as an optional argument (uses its own pid if none supplied) and returns
  information about the process on stdout
- `dmesg` is a version of dmesg implemented in rust that uses libproc-rs.

These can be run thus:
`cargo run --example procinfo` or
`sudo cargo run --example dmesg`

# Contributing

You are welcome to fork this repo and make a pull request, or write an issue.

## Experiment in OSS funding

I am exploring the ideas around Open Source Software funding from [RadWorks Foundation]([https://radworks.org/) via
the [Drips Project](https://www.drips.network/)

This project is in Drips [here](https://www.drips.network/app/projects/github/andrewdavidmackenzie/libproc-rs)

## Input Requested

* Suggestions for API, module re-org and cross-platform abstractions are welcome.
* How to do error reporting? Define own new Errors, or keep simple with Strings?
* Would like Path/PathBuf returned when it makes sense instead of String?

## TODO

See the [list of issues](https://github.com/andrewdavidmackenzie/libproc-rs/issues).
I put the "help wanted" label where I need help from others.

- Look at what similar methods could be implemented on Linux
- Complete the API on Mac OS X - figuring out all the Mac OS X / Darwin version mess....
- Add more documentation (including samples with documentation test)
- Add own custom error type and implement From::from to ease reporting of multiple error types in clients

## Build and Test Locally

If you're feeling lucky today, start with `make` that will run `clippy`, `test` and will build docs also.

If you want to stay "pure rust" : `cargo test` will build and test as usual.

In order to have tests pass when not run as `root`, some tests check if they are `root`
at run-time (using our own `am_root()` function) and avoid failing if *not* run as `root`.

### Using `act` to run GH Actions locally

If you develop on macOS but want to ensure code builds and tests pass on linux while making changes,
you can use the [act](https://github.com/nektos/act) tool to run the GitHub Actions Workflows on
the test matrix.

Just install `act` (`brew install act` on macOS) (previously install docker if you don't have it already,
and make sure the daemon is running) then run `act push`. You can test a subset of the rust
and os versions of the matrix with something like `act push --matrix os:ubuntu-latest`

## Enter the matrix

If you want to test locally as much of the test matrix as possible (different OS and
versions of rust), that you can use `make matrix`. On macOS, if you have `act`
installed, it will use it to run the linux part of the matrix.

### macOS: clang detection and header file finding

Newer versions of `bindgen` have improved the detection of `clang` and hence macOS header files.
If you also have llvm/clang installed directly or via `brew` this may cause the build to fail saying it
cannot find `libproc.h`. This can be fixed by setting `CLANG_PATH="/usr/bin/clang"` so that `bindgen`
detects the Xcode version and hence can find the correct header files.

# Other docs

* [Reference docs](doc/References.md) used to build and document libproc-rs
* Details on methods available in different [macOS versions](doc/MacosVersions.md)

# LICENSE

This code is licensed under MIT license (see LICENCE).

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