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use crate::system_services::*;
use std::fmt::Debug;
use std::path::PathBuf;
use std::sync::Arc;
use tedge_users::UserManager;
/// Abstraction over the system-provided facility that manages starting, stopping as well as other
/// service-related management functions of system services.
pub trait SystemServiceManager: Debug {
/// Returns the name of the system service manager facility (e.g. "systemd" or "openrc").
fn name(&self) -> &str;
/// Checks whether the system service manager facility is available and operational.
fn check_operational(&self) -> Result<(), SystemServiceError>;
/// Stops the specified system service.
fn stop_service(&self, service: SystemService) -> Result<(), SystemServiceError>;
/// Restarts the specified system service.
fn restart_service(&self, service: SystemService) -> Result<(), SystemServiceError>;
/// Enables the specified system service. This does not start the service, unless you reboot.
fn enable_service(&self, service: SystemService) -> Result<(), SystemServiceError>;
/// Disables the specified system service. This does not stop the service.
fn disable_service(&self, service: SystemService) -> Result<(), SystemServiceError>;
/// Queries status of the specified system service. "Running" here means the same as "active".
fn is_service_running(&self, service: SystemService) -> Result<bool, SystemServiceError>;
/// Utility method that only restarts the `service` if it is already running.
fn restart_service_if_running(
&self,
service: SystemService,
) -> Result<bool, SystemServiceError> {
if self.is_service_running(service)? {
let () = self.restart_service(service)?;
Ok(true)
} else {
Ok(false)
}
}
}
pub fn service_manager(
user_manager: UserManager,
config_root: PathBuf,
) -> Result<Arc<dyn SystemServiceManager>, SystemServiceError> {
Ok(Arc::new(GeneralServiceManager::try_new(
user_manager,
config_root,
)?))
}
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