--- /dev/null
+#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;
+}
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