/**
 * Whether a tar line reads the filesystem rather than an archive.
 *
 * Only -c makes tar's operands source paths. Under -t and -x they are
 * member selectors matched against names inside the archive, so a
 * selector that happens to spell a mount root is not a mount at all and
 * refusing it would deny an ordinary listing.
 *
 * Scanned raw because both callers fire before flag parsing: the
 * mount-root policy at admission, and the cross-mount router deciding
 * whether a span is real. Only the first word may be GNU's dashless
 * option cluster (`tar cf a.tar d`), so a later bare word is an operand
 * and cannot turn the mode on. `--` ends the scan the way it ends GNU's
 * option parsing: a later `-c` names a member, and reading it as the
 * create flag would refuse the very selector fix this gate exists to
 * protect (`tar -xf a.tar -C /dst -- -c`).
 */
export declare function isCreateMode(argv: readonly string[]): boolean;
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