/**
 * PID Manager for MAMA Standalone
 *
 * Manages PID file for daemon process tracking
 */
/**
 * Process information
 */
export interface ProcessInfo {
    /** Process ID */
    pid: number;
    /** Start time (Unix timestamp) */
    startedAt: number;
}
/**
 * Get the full path to PID file
 */
export declare function getPidPath(): string;
/**
 * Check if PID file exists
 */
export declare function pidFileExists(): boolean;
/**
 * Write PID file with process information
 *
 * @param pid - Process ID to write
 */
export declare function writePid(pid: number): Promise<void>;
/**
 * Read process information from PID file
 *
 * @returns Process info or null if file doesn't exist
 */
export declare function readPid(): Promise<ProcessInfo | null>;
/**
 * Delete PID file
 */
export declare function deletePid(): Promise<void>;
/**
 * Check if a process with given PID is running
 *
 * @param pid - Process ID to check
 * @returns true if process is running
 */
export declare function isProcessRunning(pid: number): boolean;
/**
 * Check if MAMA daemon is currently running
 *
 * @returns Process info if running, null otherwise
 */
export declare function isDaemonRunning(): Promise<ProcessInfo | null>;
/**
 * Get uptime in human-readable format
 *
 * @param startedAt - Start timestamp
 * @returns Human-readable uptime string
 */
export declare function getUptime(startedAt: number): string;
/**
 * Get PID file modification time (for last activity tracking)
 *
 * @returns Modification timestamp or null
 */
export declare function getPidFileModTime(): Promise<number | null>;
export { expandPath } from '../config/config-manager.js';
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