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

//setup GPIO Direction folder

const char *gpio10_dir= "/sys/class/gpio/gpio26/direction";
 const char *gpio10_val= "/sys/class/gpio/gpio26/value"; /* Light On -  Light-Off*/

//create a variable to store whether we are sending a '1' or a '0'
 char set_value[4];
 FILE *fp;

/*******************************************
 *           Light on/off                  *
 *******************************************/
 void light_On(){
 char set_value[4];
 /*start motion pins*/
 if ((fp = fopen(gpio10_val, "rb+")) == NULL)
 {
 printf("Cannot open value file \n");
 exit(1);
 }
 //Set pointer to beginning of the file
 rewind(fp);
 //Write our value of "1" to the file
 strcpy(set_value,"1");

fwrite(&set_value, sizeof(char), 1, fp);
 fclose(fp);
 }
 void light_Off(){
 char set_value[4];
 /*start motion pins*/
 if ((fp = fopen(gpio10_val, "rb+")) == NULL)
 {
 printf("Cannot open value file \n");
 exit(1);
 }
 //Set pointer to beginning of the file
 rewind(fp);
 //Write our value of "1" to the file
 strcpy(set_value,"0");
 fwrite(&set_value, sizeof(char), 1, fp);

fclose(fp);
 }

void set_direction(const char *dir, int size){
 char set_value[4];

//SET DIRECTION
 //Open the LED's sysfs file in binary for reading and writing, store file pointer in fp
 if ((fp = fopen(dir, "rb+")) == NULL)
 {
 printf("Cannot open direction file \n");
 exit(1);
 }
 //Set pointer to beginning of the file
 rewind(fp);
 //Write our value of "out" to the file
 strcpy(set_value,"out");
 fwrite(&set_value, sizeof(char), size, fp);
 fclose(fp);

}
 void pin_value(const char *dir, char vset_value[]){

//Open the LED's sysfs file in binary for reading and writing, store file pointer in fp
 if ((fp = fopen(dir, "rb+")) == NULL)
 {
 printf("Cannot open value file \n");
 exit(1);
 }
 //Set pointer to beginning of the file
 rewind(fp);
 fwrite(&vset_value, sizeof(char), 1, fp);
 fclose(fp);

}
 int light()
 {
 //create a variable to store whether we are sending a '1' or a '0'
 char set_value[4];

if ((fp = fopen("/sys/class/gpio/export", "ab")) == NULL)
 {
 printf("Cannot open export file \n");
 exit(1);
 }
 rewind(fp);
 //export DAC GPIO 10
 strcpy(set_value,"26");
 fwrite(&set_value, sizeof(char), 2, fp);
 fclose(fp);

strcpy(set_value,"0");
 //setup GPIO 1
 set_direction(gpio10_dir, 3);

light_On();

return 0;
 }

int main() {

printf("Status: 204 No Content \n");
 light();
 return 0;
 }