import type { TProcessSignal } from './smartexit.types.js';
export interface IProcessTreeSignalResult {
    status: 'signalled' | 'notFound' | 'failed';
    error?: unknown;
}
export interface IProcessGroupProbeResult {
    status: 'exists' | 'notFound' | 'failed';
    error?: unknown;
}
/**
 * Signal one owned process tree synchronously so shutdown and the final exit
 * safety net use the same OS contract.
 */
export declare const signalProcessTreeByPid: (pidArg: number, signalArg: TProcessSignal) => IProcessTreeSignalResult;
/** Probe the exact POSIX process group owned by a detached group leader. */
export declare const probeProcessGroupByPid: (pidArg: number) => IProcessGroupProbeResult;