/**
 * Application: basic-webserver, Helpers.cpp
 * Author: Project, UNX511, Team A
 * Description: Contains helper functions
 * A webserver that has been coded from scratch.
 * It uses Linux's socket library to deal with connections.
 *
 * This application is licensed under Creative Commons - Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0)
 * See this for more information: http://creativecommons.org/licenses/by-nc-sa/3.0/
 */

#include "Helpers.h"

void preventZombies() {
   signal(SIGHUP, SIG_IGN); // Ignore terminal hangups
   signal(SIGCLD, SIG_IGN); // Ignore child death
   setpgrp();               // Break away from process group
}

char* runCmd(const char* cmd){
   FILE* fp;
   char* out = NULL;
   char* more_out;
   char ch;
   int count = 0;

  /* Open the command for reading. */
   fp = popen(cmd, "r");
   if (fp == NULL) {
      printf("Failed to run command\n" );
      return 0;
   }

   /* Read the output a line at a time - output it. */
   ch = fgetc(fp);
   while(ch != '\n' && ch != EOF){
      more_out = (char*) realloc(out, ++count); // no need to free more_out

      if(more_out != NULL){
         out = more_out;
         out[count-1] = ch;
      }
      ch = fgetc(fp);
   }

   pclose(fp);
   return out;
}