beeMail_getEmailCount.ino

//detivative of code posted here: https://www.sparkfun.com/news/1360
//discussion of project here: http://blog.carlynorama.com/tag/intelgalileo/
//RELEVANT CHANGES FROM OC COMMENTED IN ALL CAPS

int getEmailCount()
{
  //SAME VARIABLES
  int digits = 0;
  char temp[10];
  int emailCnt = 0;

  // Send a system call to run our python script and route the
  // output of the script to a file.
  //ADDED ERROR MESSAGE LOG
  //MADE THE FILE I WAS WRITING TO A .TXT FILE
  //ADDED ERROR MESAGES LOG 
  system("python /media/realroot/pyMailCheck.py > /media/realroot/emails.txt 2>pyMailErrors.log");

  // Check to see if the file exists: 
  //ADDED IF FILE EXISTS CHECK
  if (SD.exists("emails.txt")) {
    //Serial.println("emails exists.");


    File emailsFile = SD.open("emails.txt"); // open emails for reading

    if (emailsFile) {
      while ((emailsFile.available()) && (emailsFile.peek() != '\n')) {
        //digits++ is acting like i++, it will go up every time. Assumes no bigger than 10 digit number
        //digits is incremented AFTER it is used. 
        temp[digits++] = emailsFile.read();
      }
      //digits now contains the index number of the next empty place
      //THIS IS WHERE I ADDED THE NULL TERMINATION
      temp[digits] = NULL;
      //Serial.print("digits: ");
      //Serial.println(digits);
      //Serial.print("temp: ");
      //Serial.println(temp);
      //REPLACE THE FOR LOOPING WITH RUNNING atoi() ON THE CHAR ARRAY.
      //THE FOR LOOPS ARE FRIENDLIER B/C atoi() IS NOT IN THE ARDUINO DOCS
      emailCnt = atoi(temp);
      emailsFile.close();

    }  
    // if the file isn't open, pop up an error:
    else {
      //TELL ME ABOUT THE PROBLEMS
      Serial.println("error with emailsFile.txt");
    }

  }
  else {
    //ALERT THAT SOMETHING WENT WRONG WITH THE PYTHON
    Serial.println("emails doesn't exist.");  
  }
  return emailCnt;
}