dirRenamePreserveLinux

fn dirRenamePreserveLinux(
    old_dir: Dir,
    old_sub_path: []const u8,
    new_dir: Dir,
    new_sub_path: []const u8,
) Dir.RenamePreserveError!void {
    const linux = std.os.linux;

    var old_path_buffer: [linux.PATH_MAX]u8 = undefined;
    var new_path_buffer: [linux.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 (linux.errno(linux.renameat2(
        old_dir.handle,
        old_sub_path_posix,
        new_dir.handle,
        new_sub_path_posix,
        .{ .NOREPLACE = true },
    ))) {
        .SUCCESS => return syscall.finish(),
        .INTR => {
            try syscall.checkCancel();
            continue;
        },
        .ACCES => return syscall.fail(error.AccessDenied),
        .PERM => return syscall.fail(error.PermissionDenied),
        .BUSY => return syscall.fail(error.FileBusy),
        .DQUOT => return syscall.fail(error.DiskQuota),
        .ISDIR => return syscall.fail(error.IsDir),
        .LOOP => return syscall.fail(error.SymLinkLoop),
        .MLINK => return syscall.fail(error.LinkQuotaExceeded),
        .NAMETOOLONG => return syscall.fail(error.NameTooLong),
        .NOENT => return syscall.fail(error.FileNotFound),
        .NOTDIR => return syscall.fail(error.NotDir),
        .NOMEM => return syscall.fail(error.SystemResources),
        .NOSPC => return syscall.fail(error.NoSpaceLeft),
        .EXIST => return syscall.fail(error.PathAlreadyExists),
        .NOTEMPTY => return syscall.fail(error.DirNotEmpty),
        .ROFS => return syscall.fail(error.ReadOnlyFileSystem),
        .XDEV => return syscall.fail(error.CrossDevice),
        .ILSEQ => return syscall.fail(error.BadPathName),
        .FAULT => |err| return syscall.errnoBug(err),
        .INVAL => |err| return syscall.errnoBug(err),
        else => |err| return syscall.unexpectedErrno(err),
    };
}