#include <time.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/errno.h>

int main(int argc, char** argv)
{
	int fd = open("/dev/lp0", O_RDWR | O_NONBLOCK);
	int ret = 0;
	int status = 0;
	char buffer[1024];
	char teststr[] = "This is a test\n";
	char XMIT_STATUS_OFFLINE[] = {0x10,0x04,0x02};
	char XMIT_STATUS_ERROR[] = {0x10,0x04,0x03};
	char XMIT_STATUS_ROLL[] = {0x10,0x04,0x04};
	char XMIT_STATUS_SLIP[] = {0x10,0x04,0x05};
	fd_set rfds;
	FD_ZERO( &rfds );
	FD_SET( fd, &rfds );
	struct timeval sleep;
	sleep.tv_sec = 5;
	sleep.tv_usec = 0;

	/* Offline status */
	ret = write(fd, XMIT_STATUS_OFFLINE, sizeof(XMIT_STATUS_OFFLINE));
	//printf("write() returned %d\n", ret);

	do {
		ret = select( fd + 1, &rfds, NULL, NULL, &sleep );
	} while (ret < 0 && (errno == EINTR));

	ret = read(fd, buffer, 1024);
if(ret == -1) {
		perror("read(): ");
	} else {
		status = buffer[0];
		if((status & 0x04) != 0)
		{
			printf("The cover is open.\n");
		} else {
			printf("OFFLINE is good.\n");
		}
	}
        close(fd);
        return 0;
}