Question

I am trying to find a c function that generates a 32bit random/pseudo random number and can be reproduced. (Like the rand/srand functions). I cannot use urandom because I cannot reproduce the sequence like I can with srand/rand. Do I have to write my own function or does something like this already exist?

Thanks

For future reference, while the suggestions by others were good. I ended up by doing something like this:

uint32_t generateRandom (unsigned int randomSeed) {
   uint32_t number = 0;
   int randomNumber, x;

   for (x=0; x<8;x++) {
       randomNumber = rand_r(&randomSeed) % 16;
       number |= (randomNumber<<(x*4));
       randomSeed++;
   }
   return (number);
}

Answer 1

Join 2 (or more) rand() results to obtain as many digits as you need.
Bad (because it’s exaggerated) example:

uint32_t bit0 = rand() & 1;
uint32_t bit1 = rand() & 1;
/* ... */
uint32_t bit31 = rand() & 1;

uint32_t whole = bit0 | (bit1 << 1) | ... | (bit31 << 31);