/* James Nobis UPSD monitoring program for apc ups'
   GPL'ed
*/

#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <termios.h>

int main()
{
   int serial,i,outage;
   char c;
   struct termios old_flags, new_flags;
   outage=0;

   daemon(0,0);
   serial = open ("/dev/ttyS0",O_RDONLY);
   
   if (serial==-1) exit(0);

   tcgetattr(serial,&old_flags);
   new_flags = old_flags;
   new_flags.c_lflag &= ~(ECHO | ICANON | ISIG);
   new_flags.c_iflag &= ~(BRKINT | ICRNL);
   new_flags.c_oflag &= ~OPOST;
   new_flags.c_cc[VTIME] = 0;
   new_flags.c_cc[VMIN] = 1;
   if (tcsetattr(serial, TCSAFLUSH, &new_flags) < 0)
      printf("woops\n");

   while ((i = read(serial, &c, 1) == 1))
   {
      if ((c &= 255) == 33) 
      {
         if (outage==2) 
         {
              system("echo \"Uaho!\" | mail -s 'power outage!' 9999999999@messaging.sprintpcs.com");
         
         }
         outage++;
      }

      if ((c & 255) == 36)
         outage=0;
 
   }

   close(serial);
}