#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>

#define STARTFILE		"/var/run/ppp.linkstart"

int main()
{
	int fd = open(STARTFILE, O_RDONLY);
	char buf[128];
	time_t start, end;
	unsigned int diff;
	if(fd<0) {
		perror("could not open ppp.linkstart");
		exit(1);
	}
	read(fd, buf, sizeof(buf));
	if(buf[strlen(buf)-1] == '\n') buf[strlen(buf)-1] = '\0';
	start = atoi(buf);
	end = start+7200;
	diff = end-time(NULL);
	printf("Connection started at  %s", ctime(&start));
	printf("Connection will end at %s", ctime(&end));
	printf("%d seconds remaining\n", diff);		
}