| #include <stdio.h> |
| #include <stdlib.h> |
| #include <fcntl.h> |
| #include <string.h> |
| #include <errno.h> |
| #include <time.h> |
| #include <sys/select.h> |
| #include <sys/inotify.h> |
| |
| #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) |
| |
| //#include <linux/input.h> // this does not compile |
| |
| // from <linux/input.h> |
| |
| struct input_event { |
| struct timeval time; |
| __u16 type; |
| __u16 code; |
| __s32 value; |
| }; |
| |
| #define EVIOCGVERSION _IOR('E', 0x01, int) /* get driver version */ |
| #define EVIOCGID _IOR('E', 0x02, struct input_id) /* get device ID */ |
| #define EVIOCGKEYCODE _IOR('E', 0x04, int[2]) /* get keycode */ |
| #define EVIOCSKEYCODE _IOW('E', 0x04, int[2]) /* set keycode */ |
| |
| #define EVIOCGNAME(len) _IOC(_IOC_READ, 'E', 0x06, len) /* get device name */ |
| #define EVIOCGPHYS(len) _IOC(_IOC_READ, 'E', 0x07, len) /* get physical location */ |
| #define EVIOCGUNIQ(len) _IOC(_IOC_READ, 'E', 0x08, len) /* get unique identifier */ |
| |
| #define EVIOCGKEY(len) _IOC(_IOC_READ, 'E', 0x18, len) /* get global keystate */ |
| #define EVIOCGLED(len) _IOC(_IOC_READ, 'E', 0x19, len) /* get all LEDs */ |
| #define EVIOCGSND(len) _IOC(_IOC_READ, 'E', 0x1a, len) /* get all sounds status */ |
| #define EVIOCGSW(len) _IOC(_IOC_READ, 'E', 0x1b, len) /* get all switch states */ |
| |
| #define EVIOCGBIT(ev,len) _IOC(_IOC_READ, 'E', 0x20 + ev, len) /* get event bits */ |
| #define EVIOCGABS(abs) _IOR('E', 0x40 + abs, struct input_absinfo) /* get abs value/limits */ |
| #define EVIOCSABS(abs) _IOW('E', 0xc0 + abs, struct input_absinfo) /* set abs value/limits */ |
| |
| #define EVIOCSFF _IOC(_IOC_WRITE, 'E', 0x80, sizeof(struct ff_effect)) /* send a force effect to a force feedback device */ |
| #define EVIOCRMFF _IOW('E', 0x81, int) /* Erase a force effect */ |
| #define EVIOCGEFFECTS _IOR('E', 0x84, int) /* Report number of effects playable at the same time */ |
| |
| #define EVIOCGRAB _IOW('E', 0x90, int) /* Grab/Release device */ |
| |
| /* |
| * Event types |
| */ |
| |
| #define EV_SYN 0x00 |
| #define EV_KEY 0x01 |
| #define EV_REL 0x02 |
| #define EV_ABS 0x03 |
| #define EV_MSC 0x04 |
| #define EV_SW 0x05 |
| #define EV_LED 0x11 |
| #define EV_SND 0x12 |
| #define EV_REP 0x14 |
| #define EV_FF 0x15 |
| #define EV_PWR 0x16 |
| #define EV_FF_STATUS 0x17 |
| #define EV_MAX 0x1f |
| |
| #define KEY_POWER 116 |
| #define KEY_SLEEP 142 |
| #define SW_0 0x00 |
| |
| // end <linux/input.h> |
| |
| struct notify_entry { |
| int id; |
| int (*handler)(struct notify_entry *entry, struct inotify_event *event); |
| const char *filename; |
| }; |
| |
| int charging_state_notify_handler(struct notify_entry *entry, struct inotify_event *event) |
| { |
| static int state = -1; |
| int last_state; |
| char buf[40]; |
| int read_len; |
| int fd; |
| |
| last_state = state; |
| fd = open(entry->filename, O_RDONLY); |
| read_len = read(fd, buf, sizeof(buf)); |
| if(read_len > 0) { |
| //printf("charging_state_notify_handler: \"%s\"\n", buf); |
| state = !(strncmp(buf, "Unknown", 7) == 0 |
| || strncmp(buf, "Discharging", 11) == 0); |
| } |
| close(fd); |
| //printf("charging_state_notify_handler: %d -> %d\n", last_state, state); |
| return state > last_state; |
| } |
| |
| struct notify_entry watched_files[] = { |
| { |
| .filename = "/sys/android_power/charging_state", |
| .handler = charging_state_notify_handler |
| } |
| }; |
| |
| int call_notify_handler(struct inotify_event *event) |
| { |
| unsigned int start, i; |
| start = event->wd - watched_files[0].id; |
| if(start >= ARRAY_SIZE(watched_files)) |
| start = 0; |
| //printf("%d: %08x \"%s\"\n", event->wd, event->mask, event->len ? event->name : ""); |
| for(i = start; i < ARRAY_SIZE(watched_files); i++) { |
| if(event->wd == watched_files[i].id) { |
| if(watched_files[i].handler) { |
| return watched_files[i].handler(&watched_files[i], event); |
| } |
| return 1; |
| } |
| } |
| for(i = 0; i < start; i++) { |
| if(event->wd == watched_files[i].id) { |
| if(watched_files[i].handler) { |
| return watched_files[i].handler(&watched_files[i], event); |
| } |
| return 1; |
| } |
| } |
| return 0; |
| } |
| |
| int handle_inotify_event(int nfd) |
| { |
| int res; |
| int wake_up = 0; |
| struct inotify_event *event; |
| char event_buf[512]; |
| int event_pos = 0; |
| |
| res = read(nfd, event_buf, sizeof(event_buf)); |
| if(res < (int)sizeof(*event)) { |
| if(errno == EINTR) |
| return 0; |
| fprintf(stderr, "could not get event, %s\n", strerror(errno)); |
| return 0; |
| } |
| printf("got %d bytes of event information\n", res); |
| while(res >= (int)sizeof(*event)) { |
| int event_size; |
| event = (struct inotify_event *)(event_buf + event_pos); |
| wake_up |= call_notify_handler(event); |
| event_size = sizeof(*event) + event->len; |
| res -= event_size; |
| event_pos += event_size; |
| } |
| return wake_up; |
| } |
| |
| int powerd_main(int argc, char *argv[]) |
| { |
| int c; |
| unsigned int i; |
| int res; |
| struct timeval tv; |
| int eventfd; |
| int notifyfd; |
| int powerfd; |
| int powerfd_is_sleep; |
| int user_activity_fd; |
| int acquire_partial_wake_lock_fd; |
| int acquire_full_wake_lock_fd; |
| int release_wake_lock_fd; |
| char *eventdev = "/dev/input/event0"; |
| const char *android_sleepdev = "/sys/android_power/request_sleep"; |
| const char *android_autooff_dev = "/sys/android_power/auto_off_timeout"; |
| const char *android_user_activity_dev = "/sys/android_power/last_user_activity"; |
| const char *android_acquire_partial_wake_lock_dev = "/sys/android_power/acquire_partial_wake_lock"; |
| const char *android_acquire_full_wake_lock_dev = "/sys/android_power/acquire_full_wake_lock"; |
| const char *android_release_wake_lock_dev = "/sys/android_power/release_wake_lock"; |
| const char *powerdev = "/sys/power/state"; |
| const char suspendstring[] = "standby"; |
| const char wakelockstring[] = "powerd"; |
| fd_set rfds; |
| struct input_event event; |
| struct input_event light_event; |
| struct input_event light_event2; |
| int gotkey = 1; |
| time_t idle_time = 5; |
| const char *idle_time_string = "5"; |
| time_t lcd_light_time = 0; |
| time_t key_light_time = 0; |
| int verbose = 1; |
| int event_sleep = 0; |
| int got_power_key_down = 0; |
| struct timeval power_key_down_time = { 0, 0 }; |
| |
| light_event.type = EV_LED; |
| light_event.code = 4; // bright lcd backlight |
| light_event.value = 0; // light off -- sleep after timeout |
| |
| light_event2.type = EV_LED; |
| light_event2.code = 8; // keyboard backlight |
| light_event2.value = 0; // light off -- sleep after timeout |
| |
| do { |
| c = getopt(argc, argv, "e:ni:vql:k:"); |
| if (c == EOF) |
| break; |
| switch (c) { |
| case 'e': |
| eventdev = optarg; |
| break; |
| case 'n': |
| gotkey = 0; |
| break; |
| case 'i': |
| idle_time = atoi(optarg); |
| idle_time_string = optarg; |
| break; |
| case 'v': |
| verbose = 2; |
| break; |
| case 'q': |
| verbose = 0; |
| break; |
| case 'l': |
| lcd_light_time = atoi(optarg); |
| break; |
| case 'k': |
| key_light_time = atoi(optarg); |
| break; |
| case '?': |
| fprintf(stderr, "%s: invalid option -%c\n", |
| argv[0], optopt); |
| exit(1); |
| } |
| } while (1); |
| if(optind != argc) { |
| fprintf(stderr,"%s [-e eventdev]\n", argv[0]); |
| return 1; |
| } |
| |
| eventfd = open(eventdev, O_RDWR | O_NONBLOCK); |
| if(eventfd < 0) { |
| fprintf(stderr, "could not open %s, %s\n", eventdev, strerror(errno)); |
| return 1; |
| } |
| if(key_light_time >= lcd_light_time) { |
| lcd_light_time = key_light_time + 1; |
| fprintf(stderr,"lcd bright backlight time must be longer than keyboard backlight time.\n" |
| "Setting lcd bright backlight time to %ld seconds\n", lcd_light_time); |
| } |
| |
| user_activity_fd = open(android_user_activity_dev, O_RDWR); |
| if(user_activity_fd >= 0) { |
| int auto_off_fd = open(android_autooff_dev, O_RDWR); |
| write(auto_off_fd, idle_time_string, strlen(idle_time_string)); |
| close(auto_off_fd); |
| } |
| |
| powerfd = open(android_sleepdev, O_RDWR); |
| if(powerfd >= 0) { |
| powerfd_is_sleep = 1; |
| if(verbose > 0) |
| printf("Using android sleep dev: %s\n", android_sleepdev); |
| } |
| else { |
| powerfd_is_sleep = 0; |
| powerfd = open(powerdev, O_RDWR); |
| if(powerfd >= 0) { |
| if(verbose > 0) |
| printf("Using linux power dev: %s\n", powerdev); |
| } |
| } |
| if(powerfd < 0) { |
| fprintf(stderr, "could not open %s, %s\n", powerdev, strerror(errno)); |
| return 1; |
| } |
| |
| notifyfd = inotify_init(); |
| if(notifyfd < 0) { |
| fprintf(stderr, "inotify_init failed, %s\n", strerror(errno)); |
| return 1; |
| } |
| fcntl(notifyfd, F_SETFL, O_NONBLOCK | fcntl(notifyfd, F_GETFL)); |
| for(i = 0; i < ARRAY_SIZE(watched_files); i++) { |
| watched_files[i].id = inotify_add_watch(notifyfd, watched_files[i].filename, IN_MODIFY); |
| printf("Watching %s, id %d\n", watched_files[i].filename, watched_files[i].id); |
| } |
| |
| acquire_partial_wake_lock_fd = open(android_acquire_partial_wake_lock_dev, O_RDWR); |
| acquire_full_wake_lock_fd = open(android_acquire_full_wake_lock_dev, O_RDWR); |
| release_wake_lock_fd = open(android_release_wake_lock_dev, O_RDWR); |
| |
| if(user_activity_fd >= 0) { |
| idle_time = 60*60*24; // driver handles real timeout |
| } |
| if(gotkey) { |
| tv.tv_sec = idle_time; |
| tv.tv_usec = 0; |
| } |
| else { |
| tv.tv_sec = 0; |
| tv.tv_usec = 500000; |
| } |
| |
| while(1) { |
| FD_ZERO(&rfds); |
| //FD_SET(0, &rfds); |
| FD_SET(eventfd, &rfds); |
| FD_SET(notifyfd, &rfds); |
| res = select(((notifyfd > eventfd) ? notifyfd : eventfd) + 1, &rfds, NULL, NULL, &tv); |
| if(res < 0) { |
| fprintf(stderr, "select failed, %s\n", strerror(errno)); |
| return 1; |
| } |
| if(res == 0) { |
| if(light_event2.value == 1) |
| goto light2_off; |
| if(light_event.value == 1) |
| goto light_off; |
| if(user_activity_fd < 0) { |
| if(gotkey && verbose > 0) |
| printf("Idle - sleep\n"); |
| if(!gotkey && verbose > 1) |
| printf("Reenter sleep\n"); |
| goto sleep; |
| } |
| else { |
| tv.tv_sec = 60*60*24; |
| tv.tv_usec = 0; |
| } |
| } |
| if(res > 0) { |
| //if(FD_ISSET(0, &rfds)) { |
| // printf("goto data on stdin quit\n"); |
| // return 0; |
| //} |
| if(FD_ISSET(notifyfd, &rfds)) { |
| write(acquire_partial_wake_lock_fd, wakelockstring, sizeof(wakelockstring) - 1); |
| if(handle_inotify_event(notifyfd) > 0) { |
| write(acquire_full_wake_lock_fd, wakelockstring, sizeof(wakelockstring) - 1); |
| } |
| write(release_wake_lock_fd, wakelockstring, sizeof(wakelockstring) - 1); |
| } |
| if(FD_ISSET(eventfd, &rfds)) { |
| write(acquire_partial_wake_lock_fd, wakelockstring, sizeof(wakelockstring) - 1); |
| res = read(eventfd, &event, sizeof(event)); |
| if(res < (int)sizeof(event)) { |
| fprintf(stderr, "could not get event\n"); |
| write(release_wake_lock_fd, wakelockstring, sizeof(wakelockstring) - 1); |
| return 1; |
| } |
| if(event.type == EV_PWR && event.code == KEY_SLEEP) { |
| event_sleep = event.value; |
| } |
| if(event.type == EV_KEY || (event.type == EV_SW && event.code == SW_0 && event.value == 1)) { |
| gotkey = 1; |
| if(user_activity_fd >= 0) { |
| char buf[32]; |
| int len; |
| len = sprintf(buf, "%ld%06lu000", event.time.tv_sec, event.time.tv_usec); |
| write(user_activity_fd, buf, len); |
| } |
| if(lcd_light_time | key_light_time) { |
| tv.tv_sec = key_light_time; |
| light_event.value = 1; |
| write(eventfd, &light_event, sizeof(light_event)); |
| light_event2.value = 1; |
| write(eventfd, &light_event2, sizeof(light_event2)); |
| } |
| else { |
| tv.tv_sec = idle_time; |
| } |
| tv.tv_usec = 0; |
| if(verbose > 1) |
| printf("got %s %s %d%s\n", event.type == EV_KEY ? "key" : "switch", event.value ? "down" : "up", event.code, event_sleep ? " from sleep" : ""); |
| if(event.code == KEY_POWER) { |
| if(event.value == 0) { |
| int tmp_got_power_key_down = got_power_key_down; |
| got_power_key_down = 0; |
| if(tmp_got_power_key_down) { |
| // power key released |
| if(verbose > 0) |
| printf("Power key released - sleep\n"); |
| write(release_wake_lock_fd, wakelockstring, sizeof(wakelockstring) - 1); |
| goto sleep; |
| } |
| } |
| else if(event_sleep == 0) { |
| got_power_key_down = 1; |
| power_key_down_time = event.time; |
| } |
| } |
| } |
| if(event.type == EV_SW && event.code == SW_0 && event.value == 0) { |
| if(verbose > 0) |
| printf("Flip closed - sleep\n"); |
| power_key_down_time = event.time; |
| write(release_wake_lock_fd, wakelockstring, sizeof(wakelockstring) - 1); |
| goto sleep; |
| } |
| write(release_wake_lock_fd, wakelockstring, sizeof(wakelockstring) - 1); |
| } |
| } |
| if(0) { |
| light_off: |
| light_event.value = 0; |
| write(eventfd, &light_event, sizeof(light_event)); |
| tv.tv_sec = idle_time - lcd_light_time; |
| } |
| if(0) { |
| light2_off: |
| light_event2.value = 0; |
| write(eventfd, &light_event2, sizeof(light_event2)); |
| tv.tv_sec = lcd_light_time - key_light_time; |
| } |
| if(0) { |
| sleep: |
| if(light_event.value == 1) { |
| light_event.value = 0; |
| write(eventfd, &light_event, sizeof(light_event)); |
| light_event2.value = 0; |
| write(eventfd, &light_event2, sizeof(light_event2)); |
| tv.tv_sec = idle_time - lcd_light_time; |
| } |
| if(powerfd_is_sleep) { |
| char buf[32]; |
| int len; |
| len = sprintf(buf, "%ld%06lu000", power_key_down_time.tv_sec, power_key_down_time.tv_usec); |
| write(powerfd, buf, len); |
| } |
| else |
| write(powerfd, suspendstring, sizeof(suspendstring) - 1); |
| gotkey = 0; |
| tv.tv_sec = 0; |
| tv.tv_usec = 500000; |
| } |
| } |
| |
| return 0; |
| } |
