WRAP reboot

gpio.c

#include <sys/types.h>
#include <sys/gpio.h>
#include <sys/ioctl.h>
#include <sys/reboot.h>
 
#include <err.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
 
#define _PATH_DEV_GPIO  "/dev/gpio0"
 
char *device = _PATH_DEV_GPIO;
int devfd = -1;
int quiet = 0;
 
int pinread(int);
 
main()
{
        if ((devfd = open(device, O_RDWR)) == -1)
                err(1, "%s", device);
        while (pinread(40) == 1) {
                sleep(3);
        }
        reboot(3);
}
 
int
pinread(int pin)
{
        struct gpio_pin_op op;
 
        bzero(&op, sizeof(op));
        op.gp_pin = pin;
        if (ioctl(devfd, GPIOPINREAD, &op) == -1)
                err(1, "GPIOPINREAD");
 
        return op.gp_value;
}