From inside of awk, I want to generate a string of X alphanumeric characters reasonably random (i.e., random but not cryptographic) on demand and rapidly.

From inside of awk, I want to generate a string of X alphanumeric characters reasonably random (i.e., random but not cryptographic) on demand and rapidly.

From inside of awk, I want to generate a string of X alphanumeric characters reasonably random (i.e., random but not cryptographic) on demand and rapidly.