export interface WebUiInstance {
    readonly pid: number;
    readonly port: number;
    readonly origin: string;
    readonly startedAt: string;
}
export declare class WebUiAlreadyRunningError extends Error {
    readonly instance: WebUiInstance;
    constructor(instance: WebUiInstance);
}
export interface WebUiInstanceLock {
    readonly path: string;
    readonly controlToken: string;
    publishOrigin(origin: string): Promise<void>;
    release(): Promise<void>;
}
export type StopWebUiResult = {
    readonly disposition: 'not_running';
} | {
    readonly disposition: 'stopped';
    readonly instance: WebUiInstance;
};
export declare function readWebUiInstance(globalConfigDirectory: string): Promise<WebUiInstance | undefined>;
export declare function stopWebUiInstance(globalConfigDirectory: string): Promise<StopWebUiResult>;
export declare function acquireWebUiInstanceLock(globalConfigDirectory: string, port: number): Promise<WebUiInstanceLock>;
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