#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "cgic.h"

int startRobotArmDeviceDriverSession();

int cgiMain() {
	if (startRobotArmDeviceDriverSession() == 1) {
		cgiHeaderLocation("/cgi-bin/robarm_control.cgi");
	} else {
		cgiHeaderLocation("/RobotArmFailedLogin.html");
	}

	return 0;
}

/**
 * @return 1 if the session was successfully started, 0 otherwise
 */
int startRobotArmDeviceDriverSession() {
	int file = open("/dev/robarm0", O_RDWR);
	char* msg;
	int len = strlen("start session")+1;
	size_t ret;

	if (file < 0) {
		return 0;
	}

	msg = (char*) malloc(sizeof(char)*len);
	strcpy(msg, "start session");

	ret = write(file, msg, len);

	close(file);
	free(msg);

	if ((int) ret == len) {
		return 1;
	} else {
		// error
		return 0;
	}
}