export declare class DaemonLockError extends Error {
    code: 'HELD' | 'UNSUPPORTED_FILESYSTEM';
    constructor(code: 'HELD' | 'UNSUPPORTED_FILESYSTEM', message: string);
}
export interface DaemonLockHandle {
    /** Frees the lock; calling it again does nothing. */
    release(): void;
}
/** The filesystem type of the mount that contains `path`, from /proc/self/mountinfo text. */
export declare function mountFsTypeOf(mountinfo: string, path: string): string | undefined;
/** Throws UNSUPPORTED_FILESYSTEM when `root` is on a network filesystem. A
 *  platform or path the check cannot classify is allowed. */
export declare function assertSupportedFilesystem(root: string, opts?: {
    mountinfo?: string;
}): void;
/**
 * Takes the lock for (root, org) or throws DaemonLockError: HELD when another
 * daemon owns it, UNSUPPORTED_FILESYSTEM when the root is on a network mount.
 */
export declare function acquireDaemonLock(root: string, org: string): Promise<DaemonLockHandle>;
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