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



/* reads from the device. Especified the number of characters
 * to be read from the device. Its just a dummy program!!! 
 */

int main(int argc, char * argv[]){
	
	int fd,ret;
	char * buf;
	
	if(argc != 2) {
		printf("usage %s <num of char>\n",argv[0]);
		return 0;
	}
	
	if((fd = open("/dev/lcd", O_RDWR)) < -1) {
		perror("file files\n");
		return 0;
	}
	
	if((buf = malloc(atoi(argv[1])))==NULL){
		printf("malloc failed\n");
		return 0;
	}
	
	if( (ret = read(fd,buf,atoi(argv[1]))) < 0){
		perror("read");
		return 0;
	}
	
	printf("Read %d characters\n",ret);
	printf("\n%s\n",buf);
	return 0;
}