/**
 * Whether a TCP port can still be bound on this machine.
 *
 * Binding is the only check that also sees processes the manifest store knows nothing about (an
 * unrelated server, a leftover process, an e2e run started from a checkout with its own generated
 * directory), so port bookkeeping always combines the manifests with this probe.
 */
export declare function isPortAvailable(port: number, host?: string): Promise<boolean>;
/**
 * Whether something accepts TCP connections on a port.
 *
 * The inverse of `isPortAvailable` is not the same check: a bind probe only tells us the port is
 * taken on the host we probed, while a server we want to talk to has to accept the connection. Used
 * to tell "your MySQL is not running" apart from "your MySQL is running elsewhere".
 */
export declare function isPortListening(port: number, host?: string, timeoutMs?: number): Promise<boolean>;
/**
 * The subset of `ports` that is already in use, in the order they were passed in.
 */
export declare function findBusyPorts(ports: number[], host?: string): Promise<number[]>;
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