import type { RuntimeVFS } from '../../vfs.ts';
export interface FSLike {
    mkdirTree(path: string): void;
    writeFile(path: string, bytes: Uint8Array): void;
    /** Note a character device without materializing its content. */
    charDevice?(path: string, mode: number, rdev: number): void;
    /**
     * Note a listed file whose content could not be fetched. A target that
     * does not implement this simply omits the file, which is only safe
     * when nothing will write to it.
     */
    markUnreadable?(path: string): void;
    /**
     * Note a namespace symlink and its target. A target that cannot hold
     * links omits them, which is what every seed did before links were
     * reachable at all.
     */
    symlink?(path: string, target: string): void;
    /**
     * The mount's permission bits for a path already written. Spelled the
     * way Emscripten's own FS spells it, so a target that is a real FS
     * satisfies it as it stands; a target with no notion of a mode omits
     * it and its files keep the tree's default.
     */
    chmod?(path: string, mode: number): void;
    /** The mount's stamps, in milliseconds, as Emscripten's FS takes them. */
    utime?(path: string, atimeMs: number, mtimeMs: number): void;
}
/**
 * Copy one mount prefix into a synchronous target.
 *
 * Args:
 *   fs: the tree collector to fill.
 *   vfs: the runtime's mount vocabulary to read through.
 *   prefix: the mount prefix to walk.
 */
export declare function preloadInto(fs: FSLike, vfs: RuntimeVFS, prefix: string): Promise<void>;
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