#include <hardware/flashlight.h>#include <stdio.h>#include <unistd.h>#include <fcntl.h>#include <errno.h>#define FLASHLIGHT "/sys/class/leds/spotlight/brightness"#define CAMERA_FLASH "/sys/class/timed_output/flash/enable"int get_flashlight_enabled(){    int fd;    int ret = 0;    char value;    fd = open(FLASHLIGHT, O_RDONLY);    if(fd && read(fd, &value, 1) == 1) {        ret = (value == '1');    }    close(fd);    return ret;}int set_flashlight_enabled(int on){    int nwr, ret, fd;    char value[20];    fd = open(FLASHLIGHT, O_RDWR);    if(fd < 0)        return errno;    nwr = sprintf(value, "%d\n", !!on);    ret = write(fd, value, nwr);    close(fd);    return (ret == nwr) ? 0 : -1;}int enable_camera_flash(int milliseconds){    int nwr, ret, fd;    char value[20];    fd = open(CAMERA_FLASH, O_RDWR);    if(fd < 0)        return errno;    nwr = sprintf(value, "%d\n", milliseconds);    ret = write(fd, value, nwr);    close(fd);    return (ret == nwr) ? 0 : -1;}