#include <stdio.h>
#include <string.h>
#include <iostream>

// don't want the standard library's getline
//using namespace std;

int main() {
   FILE * stream = popen("/bin/ls -alrt", "r");

   if (stream == nullptr) {
      perror("popen");
      exit(0);
   }

   char  * line = nullptr;
   size_t len;
   
   int size = getline(&line, &len, stream);
   while(size>0) {
      std::cout << line;
      size = getline(&line, &len, stream);
   }

   free(line);

   if(-1 == pclose(stream)) {
       perror("pclose");
   }

   return 0;
}