export declare const SIGNAL_EXIT_CODES: () => Record<SignalName, number>;
export declare const DEFAULT_FATAL_EXIT_CODE = 1;
export type SignalName = 'SIGINT' | 'SIGTERM' | 'SIGQUIT';
export type FatalKind = 'uncaughtException' | 'unhandledRejection';
export type CloseReason = {
    kind: 'signal';
    signal: SignalName;
} | {
    kind: 'fatal';
    fatal: FatalKind;
} | {
    kind: 'exit';
};
export type ExitHandlerOptions = {
    onExit?: (code: number, reason: CloseReason) => void;
    onError?: (err: unknown, kind: FatalKind) => void;
    exitOnFatal?: boolean;
    exitOnSignal?: boolean;
    fatalExitCode?: number;
};
/**
 *
 * @param options - Options for the exit handler
 * @param options.onExit - Callback to be called when the process exits
 * @param options.onError - Callback to be called when an error occurs
 * @param options.exitOnFatal - Whether to exit the process on fatal errors
 * @param options.exitOnSignal - Whether to exit the process on signals
 * @param options.fatalExitCode - The exit code to use for fatal errors
 * @returns A function to unsubscribe from the exit handlers
 */
export declare function subscribeProcessExit(options?: ExitHandlerOptions): () => void;