#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>

#include <signal.h>
#include <sys/types.h>
#include <sys/shm.h>

#include <time.h>

#include "common.h"

static int shm_id = 0; 

void free_shmem( int i ) {
   shmctl( shm_id, IPC_RMID, NULL);
   _exit(1);
}

int main( int argc, char* argv[] ) {
   
   struct inf_t *data;
   time_t start;
   
   key_t key;
   int shmflg;
   size_t size = sizeof(struct inf_t);

   start = time(NULL);

   key = getuid() + 6661;
   
   shmflg = 0600 | IPC_CREAT;
   massert( (shm_id = shmget(key, size, shmflg)) < 0, "shmget" );

   signal( SIGINT, free_shmem );

   data = (struct inf_t*)shmat( shm_id, NULL, 0 );
   if( data == (struct inf_t*)(-1)) {
      perror("shmat");
      shmctl( shm_id, IPC_RMID, NULL);
      exit(-1);
   }
   memset(data, 0, size);
   set_id(data);
   while( 1 ) {
      if( update_inf( data, start ) < 0 )
         perror("getloadavg");
      sleep(1);
   }
   return 0;
}