/* 
 * Copyright (C) 2002 Ronald Kuetemeier 
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
 */


#define _GNU_SOURCE	/* needed to get the defines */
#include <fcntl.h>	/* in glibc 2.2 this has the needed
			   values defined */
#include <signal.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <linux/kd.h>



static volatile int counter = 0;
static struct itimerval itimer;


	
static void handler(int sig, siginfo_t *si, void *data)
{


	if (counter == 0){
		itimer.it_value.tv_sec = 0;
		itimer.it_value.tv_usec = 50 * 1000;
		setitimer(ITIMER_REAL,&itimer,NULL) ;
		counter++;		
	}
	else
		counter++;
		
	return ;
	
}


static void alr_handler(int sig, siginfo_t *si, void *data)
{
	counter = 0;
	
	return ;
	
}

	
int main(void)
{
	struct sigaction act, alr;
	int fd,fd1, tone,tone_length, tone_freq;
	struct stat buff;
	off_t file_length = 0;
		
	act.sa_sigaction = handler;
	sigemptyset(&act.sa_mask);
	act.sa_flags = SA_SIGINFO;
	sigaction(SIGRTMIN, &act, NULL);

	alr.sa_sigaction = alr_handler;
	sigemptyset(&alr.sa_mask);
	alr.sa_flags = SA_SIGINFO;
	sigaction(SIGALRM, &alr, NULL);

//Change the dir path, i.e XXXXXXX
	fd = open("/home/XXXXXXX/evolution/local/Inbox", O_RDONLY);
	fd1 = open("/dev/tty0", O_RDWR);

	fcntl(fd, F_SETSIG, SIGRTMIN);
	fcntl(fd, F_NOTIFY, DN_MODIFY|DN_MULTISHOT);
	
	tone_length = 500;
	tone_freq  = 850;				

	tone = (tone_length<<16)+(1193180/tone_freq);

	while (1) {


//counter for normal evolution house keeping, i.e don't beep when no new mail
		if(counter > 5 ){
//Change the file path; replace XXXXXX ...
			stat("/home/XXXXXXXX/evolution/local/Inbox/mbox",&buff);
			if(buff.st_size > file_length){					 
				ioctl(fd1, KDMKTONE,tone); 
 			}	
			file_length = buff.st_size; 
		}
		pause();
		 
	}
	close(fd);
        close(fd1);
	return 0;	
}