renameat

fn renameat(
    old_dir: posix.fd_t,
    old_sub_path: [*:0]const u8,
    new_dir: posix.fd_t,
    new_sub_path: [*:0]const u8,
) Dir.RenameError!void {
    const syscall: Syscall = try .start();
    while (true) switch (posix.errno(posix.system.renameat(old_dir, old_sub_path, new_dir, new_sub_path))) {
        .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),
        .IO => return syscall.fail(error.HardwareFailure),
        .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.DirNotEmpty),
        .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),
    };
}