Running Ruby code in C

gistfile1.c

#include <stdio.h>
#include <ruby.h>

int main(int argc, char *argv[]) {

  // Open file
  FILE *fp;
  fp = fopen(argv[1], "r");
  if(fp == NULL) {
    return 1;
  }

  // Size of file 
  fseek(fp, 0, SEEK_END);
  long int size = ftell(fp);
  rewind(fp);

  // File -> string
  char* content = calloc(size + 1, 1);
  fread(content,1,size,fp);
 
  // Run the ruby
  ruby_init();
  rb_eval_string(content);
  ruby_finalize();

  return 0;
}