Question

So I have some temp data in my program (in RAM). I want to somehow make it seem as it is a file (for example for sending it into another program which takes a file link as argument)?

Is it possible?

How to do such thing?

Answer 1

You can do it in C using the popen() function:

FILE *f = popen("program args", "w");
// write your output to f here using stdio
pclose(f);

This is possible if your external program reads its input from stdin.