dirRenamePreserveDarwin

fn dirRenamePreserveDarwin(
    old_dir: Dir,
    old_sub_path: []const u8,
    new_dir: Dir,
    new_sub_path: []const u8,
) Dir.RenamePreserveError!void {
    var old_path_buffer: [posix.PATH_MAX]u8 = undefined;
    var new_path_buffer: [posix.PATH_MAX]u8 = undefined;
    const old_sub_path_posix = try pathToPosix(old_sub_path, &old_path_buffer);
    const new_sub_path_posix = try pathToPosix(new_sub_path, &new_path_buffer);

    const syscall: Syscall = try .start();
    while (true) {
        switch (posix.errno(std.c.renameatx_np(
            old_dir.handle,
            old_sub_path_posix,
            new_dir.handle,
            new_sub_path_posix,
            .{ .EXCL = true },
        ))) {
            .SUCCESS => {
                syscall.finish();
                break;
            },
            .INTR => {
                try syscall.checkCancel();
                continue;
            },
            .INVAL => |err| return syscall.errnoBug(err),
            .FAULT => |err| return syscall.errnoBug(err),
            .BADF => |err| return syscall.errnoBug(err),
            .ISDIR => |err| return syscall.errnoBug(err),
            .NOTEMPTY => |err| return syscall.errnoBug(err),
            .OPNOTSUPP => return syscall.fail(error.OperationUnsupported),
            .IO => return syscall.fail(error.HardwareFailure),
            .DEADLK => return syscall.fail(error.AccessDenied),
            .ACCES => return syscall.fail(error.AccessDenied),
            .DQUOT => return syscall.fail(error.DiskQuota),
            .EXIST => return syscall.fail(error.PathAlreadyExists),
            .LOOP => return syscall.fail(error.LinkQuotaExceeded),
            .NAMETOOLONG => return syscall.fail(error.NameTooLong),
            .NOENT => return syscall.fail(error.FileNotFound),
            .NOSPC => return syscall.fail(error.NoSpaceLeft),
            .NOTDIR => return syscall.fail(error.NotDir),
            .PERM => return syscall.fail(error.PermissionDenied),
            .ROFS => return syscall.fail(error.ReadOnlyFileSystem),
            .XDEV => return syscall.fail(error.CrossDevice),
            else => |err| return syscall.unexpectedErrno(err),
        }
    }
}