[luatex] tex.setrandomseed primitive missing in Lua

[Henri Menke]

On 10/01/19 11:50 AM, Henri Menke wrote:
> Dear list,
> 
> To set the random seed of the MP random number generator I have to use
> the TeX command \setrandomseed.  I can't do it from the Lua level,
> because tex.randomseed is read-only and tex.setrandomseed is nil.
> Could you please expose this primitive in Lua?

I tried to work around this using

\directlua{
  token.create("setrandomseed")
  token.create(string.byte("1"))
  token.expand()
  print(tex.randomseed)
}

but I only get ! Undefined control sequence.

> 
> Kind regards, Henri
>