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    189
  • Rank 204,649 (Top 5 %)
  • Language
    Rust
  • License
    Apache License 2.0
  • Created over 2 years ago
  • Updated 2 months ago

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Repository Details

Provides adapters to communicate with various operating system service managers like launchd and systemd

Service Manager

Crates.io Docs CI

Rust library that provides an interface towards working with the following service management platforms:

Requires Rust 1.58.1 or higher!

Installation

Add the following to your Cargo.toml:

[dependencies]
service-manager = "0.3"

Examples

Generic service management

This crate provides a mechanism to detect and use the default service management platform of the current operating system. Each ServiceManager instance provides four key methods:

  • install - will install the service specified by a given context
  • uninstall - will uninstall the service specified by a given context
  • start - will start an installed service specified by a given context
  • stop - will stop a running service specified by a given context
use service_manager::*;
use std::ffi::OsString;
use std::path::PathBuf;

// Create a label for our service
let label: ServiceLabel = "com.example.my-service".parse().unwrap();

// Get generic service by detecting what is available on the platform
let manager = <dyn ServiceManager>::native()
    .expect("Failed to detect management platform");

// Install our service using the underlying service management platform
manager.install(ServiceInstallCtx {
    label: label.clone(),
    program: PathBuf::from("path/to/my-service-executable"),
    args: vec![OsString::from("--some-arg")],
    contents: None, // Optional String for system-specific service content.
}).expect("Failed to install");

// Start our service using the underlying service management platform
manager.start(ServiceStartCtx {
    label: label.clone()
}).expect("Failed to start");

// Stop our service using the underlying service management platform
manager.stop(ServiceStopCtx {
    label: label.clone()
}).expect("Failed to stop");

// Uninstall our service using the underlying service management platform
manager.uninstall(ServiceUninstallCtx {
    label: label.clone()
}).expect("Failed to stop");

User-level service management

By default, service management platforms will interact with system-level services; however, some service management platforms like systemd and launchd support user-level services. To interact with services at the user level, you configure your manager using the generic ServiceManager::set_level function.

use service_manager::*;

// Create a label for our service
let label: ServiceLabel = "com.example.my-service".parse().unwrap();

// Get generic service by detecting what is available on the platform
let mut manager = <dyn ServiceManager>::native()
    .expect("Failed to detect management platform");

// Update our manager to work with user-level services
manager.set_level(ServiceLevel::User)
    .expect("Service manager does not support user-level services");

// Continue operating as usual via install/uninstall/start/stop
// ...

Specific service manager configurations

There are times where you need more control over the configuration of a service tied to a specific platform. To that end, you can create the service manager explicitly and set configuration properties appropriately.

use service_manager::*;
use std::ffi::OsString;
use std::path::PathBuf;

// Create a label for our service
let label: ServiceLabel = "com.example.my-service".parse().unwrap();

// Instantiate a specific service manager
let mut manager = LaunchdServiceManager::system();

// Update an install configuration property where installing a service
// will NOT add the KeepAlive flag
manager.config.install.keep_alive = false;

// Install our service using the explicit service manager
manager.install(ServiceInstallCtx {
    label: label.clone(),
    program: PathBuf::from("path/to/my-service-executable"),
    args: vec![OsString::from("--some-arg")],
    contents: None, // Optional String for system-specific service content.
}).expect("Failed to install");

Running tests

For testing purposes, we use a separate crate called system-tests and execute singular tests based on desired platform and level. From the root of the repository, execute the following to run a systemd user test:

cargo test -p system-tests systemd_for_user -- --nocapture

Separately, run a systemd system test using the following (notice using of sudo -E to maintain permissions needed for system-level installation):

sudo -E cargo test -p system-tests systemd_for_system -- --nocapture

License

This project is licensed under either of

Apache License, Version 2.0, (LICENSE-APACHE or apache-license) MIT license (LICENSE-MIT or mit-license) at your option.

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