Initial Contribution
diff --git a/libs/ui/EventHub.cpp b/libs/ui/EventHub.cpp
new file mode 100644
index 0000000..f0c77ba
--- /dev/null
+++ b/libs/ui/EventHub.cpp
@@ -0,0 +1,743 @@
+//
+// Copyright 2005 The Android Open Source Project
+//
+// Handle events, like key input and vsync.
+//
+// The goal is to provide an optimized solution for Linux, not an
+// implementation that works well across all platforms. We expect
+// events to arrive on file descriptors, so that we can use a select()
+// select() call to sleep.
+//
+// We can't select() on anything but network sockets in Windows, so we
+// provide an alternative implementation of waitEvent for that platform.
+//
+#define LOG_TAG "EventHub"
+
+//#define LOG_NDEBUG 0
+
+#include <ui/EventHub.h>
+#include <hardware/power.h>
+
+#include <cutils/properties.h>
+#include <utils/IServiceManager.h>
+#include <utils/Log.h>
+#include <utils/Timers.h>
+#include <utils.h>
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <memory.h>
+#include <errno.h>
+#include <assert.h>
+
+#include "KeyLayoutMap.h"
+
+#include <string.h>
+#include <stdint.h>
+#include <dirent.h>
+#ifdef HAVE_INOTIFY
+# include <sys/inotify.h>
+#endif
+#ifdef HAVE_ANDROID_OS
+# include <sys/limits.h> /* not part of Linux */
+#endif
+#include <sys/poll.h>
+#include <sys/ioctl.h>
+
+/* this macro is used to tell if "bit" is set in "array"
+ * it selects a byte from the array, and does a boolean AND
+ * operation with a byte that only has the relevant bit set.
+ * eg. to check for the 12th bit, we do (array[1] & 1<<4)
+ */
+#define test_bit(bit, array) (array[bit/8] & (1<<(bit%8)))
+
+#define ID_MASK 0x0000ffff
+#define SEQ_MASK 0x7fff0000
+#define SEQ_SHIFT 16
+#define id_to_index(id) ((id&ID_MASK)+1)
+
+namespace android {
+
+static const char *WAKE_LOCK_ID = "KeyEvents";
+static const char *device_path = "/dev/input";
+
+/* return the larger integer */
+static inline int max(int v1, int v2)
+{
+ return (v1 > v2) ? v1 : v2;
+}
+
+EventHub::device_t::device_t(int32_t _id, const char* _path)
+ : id(_id), path(_path), classes(0)
+ , layoutMap(new KeyLayoutMap()), next(NULL) {
+}
+
+EventHub::device_t::~device_t() {
+ delete layoutMap;
+}
+
+EventHub::EventHub(void)
+ : mError(NO_INIT), mHaveFirstKeyboard(false), mFirstKeyboardId(0)
+ , mDevicesById(0), mNumDevicesById(0)
+ , mOpeningDevices(0), mClosingDevices(0)
+ , mDevices(0), mFDs(0), mFDCount(0)
+{
+ acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID);
+#ifdef EV_SW
+ memset(mSwitches, 0, sizeof(mSwitches));
+#endif
+}
+
+/*
+ * Clean up.
+ */
+EventHub::~EventHub(void)
+{
+ release_wake_lock(WAKE_LOCK_ID);
+ // we should free stuff here...
+}
+
+void EventHub::onFirstRef()
+{
+ mError = openPlatformInput() ? NO_ERROR : UNKNOWN_ERROR;
+}
+
+status_t EventHub::errorCheck() const
+{
+ return mError;
+}
+
+String8 EventHub::getDeviceName(int32_t deviceId) const
+{
+ AutoMutex _l(mLock);
+ device_t* device = getDevice(deviceId);
+ if (device == NULL) return String8();
+ return device->name;
+}
+
+uint32_t EventHub::getDeviceClasses(int32_t deviceId) const
+{
+ AutoMutex _l(mLock);
+ device_t* device = getDevice(deviceId);
+ if (device == NULL) return 0;
+ return device->classes;
+}
+
+int EventHub::getAbsoluteInfo(int32_t deviceId, int axis, int *outMinValue,
+ int* outMaxValue, int* outFlat, int* outFuzz) const
+{
+ AutoMutex _l(mLock);
+ device_t* device = getDevice(deviceId);
+ if (device == NULL) return -1;
+
+ struct input_absinfo info;
+
+ if(ioctl(mFDs[id_to_index(device->id)].fd, EVIOCGABS(axis), &info)) {
+ LOGE("Error reading absolute controller %d for device %s fd %d\n",
+ axis, device->name.string(), mFDs[id_to_index(device->id)].fd);
+ return -1;
+ }
+ *outMinValue = info.minimum;
+ *outMaxValue = info.maximum;
+ *outFlat = info.flat;
+ *outFuzz = info.fuzz;
+ return 0;
+}
+
+int EventHub::getSwitchState(int sw) const
+{
+#ifdef EV_SW
+ if (sw >= 0 && sw <= SW_MAX) {
+ int32_t devid = mSwitches[sw];
+ if (devid != 0) {
+ return getSwitchState(devid, sw);
+ }
+ }
+#endif
+ return -1;
+}
+
+int EventHub::getSwitchState(int32_t deviceId, int sw) const
+{
+#ifdef EV_SW
+ AutoMutex _l(mLock);
+ device_t* device = getDevice(deviceId);
+ if (device == NULL) return -1;
+
+ if (sw >= 0 && sw <= SW_MAX) {
+ uint8_t sw_bitmask[(SW_MAX+1)/8];
+ memset(sw_bitmask, 0, sizeof(sw_bitmask));
+ if (ioctl(mFDs[id_to_index(device->id)].fd,
+ EVIOCGSW(sizeof(sw_bitmask)), sw_bitmask) >= 0) {
+ return test_bit(sw, sw_bitmask) ? 1 : 0;
+ }
+ }
+#endif
+
+ return -1;
+}
+
+int EventHub::getScancodeState(int code) const
+{
+ return getScancodeState(mFirstKeyboardId, code);
+}
+
+int EventHub::getScancodeState(int32_t deviceId, int code) const
+{
+ AutoMutex _l(mLock);
+ device_t* device = getDevice(deviceId);
+ if (device == NULL) return -1;
+
+ if (code >= 0 && code <= KEY_MAX) {
+ uint8_t key_bitmask[(KEY_MAX+1)/8];
+ memset(key_bitmask, 0, sizeof(key_bitmask));
+ if (ioctl(mFDs[id_to_index(device->id)].fd,
+ EVIOCGKEY(sizeof(key_bitmask)), key_bitmask) >= 0) {
+ return test_bit(code, key_bitmask) ? 1 : 0;
+ }
+ }
+
+ return -1;
+}
+
+int EventHub::getKeycodeState(int code) const
+{
+ return getKeycodeState(mFirstKeyboardId, code);
+}
+
+int EventHub::getKeycodeState(int32_t deviceId, int code) const
+{
+ AutoMutex _l(mLock);
+ device_t* device = getDevice(deviceId);
+ if (device == NULL || device->layoutMap == NULL) return -1;
+
+ Vector<int32_t> scanCodes;
+ device->layoutMap->findScancodes(code, &scanCodes);
+
+ uint8_t key_bitmask[(KEY_MAX+1)/8];
+ memset(key_bitmask, 0, sizeof(key_bitmask));
+ if (ioctl(mFDs[id_to_index(device->id)].fd,
+ EVIOCGKEY(sizeof(key_bitmask)), key_bitmask) >= 0) {
+ #if 0
+ for (size_t i=0; i<=KEY_MAX; i++) {
+ LOGI("(Scan code %d: down=%d)", i, test_bit(i, key_bitmask));
+ }
+ #endif
+ const size_t N = scanCodes.size();
+ for (size_t i=0; i<N && i<=KEY_MAX; i++) {
+ int32_t sc = scanCodes.itemAt(i);
+ //LOGI("Code %d: down=%d", sc, test_bit(sc, key_bitmask));
+ if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, key_bitmask)) {
+ return 1;
+ }
+ }
+ }
+
+ return 0;
+}
+
+EventHub::device_t* EventHub::getDevice(int32_t deviceId) const
+{
+ if (deviceId == 0) deviceId = mFirstKeyboardId;
+ int32_t id = deviceId & ID_MASK;
+ if (id >= mNumDevicesById || id < 0) return NULL;
+ device_t* dev = mDevicesById[id].device;
+ if (dev->id == deviceId) {
+ return dev;
+ }
+ return NULL;
+}
+
+bool EventHub::getEvent(int32_t* outDeviceId, int32_t* outType,
+ int32_t* outScancode, int32_t* outKeycode, uint32_t *outFlags,
+ int32_t* outValue, nsecs_t* outWhen)
+{
+ *outDeviceId = 0;
+ *outType = 0;
+ *outScancode = 0;
+ *outKeycode = 0;
+ *outFlags = 0;
+ *outValue = 0;
+ *outWhen = 0;
+
+ status_t err;
+
+ fd_set readfds;
+ int maxFd = -1;
+ int cc;
+ int i;
+ int res;
+ int pollres;
+ struct input_event iev;
+
+ // Note that we only allow one caller to getEvent(), so don't need
+ // to do locking here... only when adding/removing devices.
+
+ while(1) {
+
+ // First, report any devices that had last been added/removed.
+ if (mClosingDevices != NULL) {
+ device_t* device = mClosingDevices;
+ LOGV("Reporting device closed: id=0x%x, name=%s\n",
+ device->id, device->path.string());
+ mClosingDevices = device->next;
+ *outDeviceId = device->id;
+ if (*outDeviceId == mFirstKeyboardId) *outDeviceId = 0;
+ *outType = DEVICE_REMOVED;
+ delete device;
+ return true;
+ }
+ if (mOpeningDevices != NULL) {
+ device_t* device = mOpeningDevices;
+ LOGV("Reporting device opened: id=0x%x, name=%s\n",
+ device->id, device->path.string());
+ mOpeningDevices = device->next;
+ *outDeviceId = device->id;
+ if (*outDeviceId == mFirstKeyboardId) *outDeviceId = 0;
+ *outType = DEVICE_ADDED;
+ return true;
+ }
+
+ release_wake_lock(WAKE_LOCK_ID);
+
+ pollres = poll(mFDs, mFDCount, -1);
+
+ acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID);
+
+ if (pollres <= 0) {
+ if (errno != EINTR) {
+ LOGW("select failed (errno=%d)\n", errno);
+ usleep(100000);
+ }
+ continue;
+ }
+
+ //printf("poll %d, returned %d\n", mFDCount, pollres);
+ if(mFDs[0].revents & POLLIN) {
+ read_notify(mFDs[0].fd);
+ }
+ for(i = 1; i < mFDCount; i++) {
+ if(mFDs[i].revents) {
+ LOGV("revents for %d = 0x%08x", i, mFDs[i].revents);
+ if(mFDs[i].revents & POLLIN) {
+ res = read(mFDs[i].fd, &iev, sizeof(iev));
+ if (res == sizeof(iev)) {
+ LOGV("%s got: t0=%d, t1=%d, type=%d, code=%d, v=%d",
+ mDevices[i]->path.string(),
+ (int) iev.time.tv_sec, (int) iev.time.tv_usec,
+ iev.type, iev.code, iev.value);
+ *outDeviceId = mDevices[i]->id;
+ if (*outDeviceId == mFirstKeyboardId) *outDeviceId = 0;
+ *outType = iev.type;
+ *outScancode = iev.code;
+ if (iev.type == EV_KEY) {
+ err = mDevices[i]->layoutMap->map(iev.code, outKeycode, outFlags);
+ LOGV("iev.code=%d outKeycode=%d outFlags=0x%08x err=%d\n",
+ iev.code, *outKeycode, *outFlags, err);
+ if (err != 0) {
+ *outKeycode = 0;
+ *outFlags = 0;
+ }
+ } else {
+ *outKeycode = iev.code;
+ }
+ *outValue = iev.value;
+ *outWhen = s2ns(iev.time.tv_sec) + us2ns(iev.time.tv_usec);
+ return true;
+ } else {
+ if (res<0) {
+ LOGW("could not get event (errno=%d)", errno);
+ } else {
+ LOGE("could not get event (wrong size: %d)", res);
+ }
+ continue;
+ }
+ }
+ }
+ }
+ }
+}
+
+/*
+ * Open the platform-specific input device.
+ */
+bool EventHub::openPlatformInput(void)
+{
+ /*
+ * Open platform-specific input device(s).
+ */
+ int res;
+
+ mFDCount = 1;
+ mFDs = (pollfd *)calloc(1, sizeof(mFDs[0]));
+ mDevices = (device_t **)calloc(1, sizeof(mDevices[0]));
+ mFDs[0].events = POLLIN;
+ mDevices[0] = NULL;
+#ifdef HAVE_INOTIFY
+ mFDs[0].fd = inotify_init();
+ res = inotify_add_watch(mFDs[0].fd, device_path, IN_DELETE | IN_CREATE);
+ if(res < 0) {
+ LOGE("could not add watch for %s, %s\n", device_path, strerror(errno));
+ }
+#else
+ /*
+ * The code in EventHub::getEvent assumes that mFDs[0] is an inotify fd.
+ * We allocate space for it and set it to something invalid.
+ */
+ mFDs[0].fd = -1;
+#endif
+
+ res = scan_dir(device_path);
+ if(res < 0) {
+ LOGE("scan dir failed for %s\n", device_path);
+ //open_device("/dev/input/event0");
+ }
+
+ return true;
+}
+
+// ----------------------------------------------------------------------------
+
+int EventHub::open_device(const char *deviceName)
+{
+ int version;
+ int fd;
+ struct pollfd *new_mFDs;
+ device_t **new_devices;
+ char **new_device_names;
+ char name[80];
+ char location[80];
+ char idstr[80];
+ struct input_id id;
+
+ LOGV("Opening device: %s", deviceName);
+
+ AutoMutex _l(mLock);
+
+ fd = open(deviceName, O_RDWR);
+ if(fd < 0) {
+ LOGE("could not open %s, %s\n", deviceName, strerror(errno));
+ return -1;
+ }
+
+ if(ioctl(fd, EVIOCGVERSION, &version)) {
+ LOGE("could not get driver version for %s, %s\n", deviceName, strerror(errno));
+ return -1;
+ }
+ if(ioctl(fd, EVIOCGID, &id)) {
+ LOGE("could not get driver id for %s, %s\n", deviceName, strerror(errno));
+ return -1;
+ }
+ name[sizeof(name) - 1] = '\0';
+ location[sizeof(location) - 1] = '\0';
+ idstr[sizeof(idstr) - 1] = '\0';
+ if(ioctl(fd, EVIOCGNAME(sizeof(name) - 1), &name) < 1) {
+ //fprintf(stderr, "could not get device name for %s, %s\n", deviceName, strerror(errno));
+ name[0] = '\0';
+ }
+ if(ioctl(fd, EVIOCGPHYS(sizeof(location) - 1), &location) < 1) {
+ //fprintf(stderr, "could not get location for %s, %s\n", deviceName, strerror(errno));
+ location[0] = '\0';
+ }
+ if(ioctl(fd, EVIOCGUNIQ(sizeof(idstr) - 1), &idstr) < 1) {
+ //fprintf(stderr, "could not get idstring for %s, %s\n", deviceName, strerror(errno));
+ idstr[0] = '\0';
+ }
+
+ int devid = 0;
+ while (devid < mNumDevicesById) {
+ if (mDevicesById[devid].device == NULL) {
+ break;
+ }
+ devid++;
+ }
+ if (devid >= mNumDevicesById) {
+ device_ent* new_devids = (device_ent*)realloc(mDevicesById,
+ sizeof(mDevicesById[0]) * (devid + 1));
+ if (new_devids == NULL) {
+ LOGE("out of memory");
+ return -1;
+ }
+ mDevicesById = new_devids;
+ mNumDevicesById = devid+1;
+ mDevicesById[devid].device = NULL;
+ mDevicesById[devid].seq = 0;
+ }
+
+ mDevicesById[devid].seq = (mDevicesById[devid].seq+(1<<SEQ_SHIFT))&SEQ_MASK;
+ if (mDevicesById[devid].seq == 0) {
+ mDevicesById[devid].seq = 1<<SEQ_SHIFT;
+ }
+
+ new_mFDs = (pollfd*)realloc(mFDs, sizeof(mFDs[0]) * (mFDCount + 1));
+ new_devices = (device_t**)realloc(mDevices, sizeof(mDevices[0]) * (mFDCount + 1));
+ if (new_mFDs == NULL || new_devices == NULL) {
+ LOGE("out of memory");
+ return -1;
+ }
+ mFDs = new_mFDs;
+ mDevices = new_devices;
+
+#if 0
+ LOGI("add device %d: %s\n", mFDCount, deviceName);
+ LOGI(" bus: %04x\n"
+ " vendor %04x\n"
+ " product %04x\n"
+ " version %04x\n",
+ id.bustype, id.vendor, id.product, id.version);
+ LOGI(" name: \"%s\"\n", name);
+ LOGI(" location: \"%s\"\n"
+ " id: \"%s\"\n", location, idstr);
+ LOGI(" version: %d.%d.%d\n",
+ version >> 16, (version >> 8) & 0xff, version & 0xff);
+#endif
+
+ device_t* device = new device_t(devid|mDevicesById[devid].seq, deviceName);
+ if (device == NULL) {
+ LOGE("out of memory");
+ return -1;
+ }
+
+ mFDs[mFDCount].fd = fd;
+ mFDs[mFDCount].events = POLLIN;
+
+ // figure out the kinds of events the device reports
+ uint8_t key_bitmask[(KEY_MAX+1)/8];
+ memset(key_bitmask, 0, sizeof(key_bitmask));
+ LOGV("Getting keys...");
+ if (ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(key_bitmask)), key_bitmask) >= 0) {
+ //LOGI("MAP\n");
+ //for (int i=0; i<((KEY_MAX+1)/8); i++) {
+ // LOGI("%d: 0x%02x\n", i, key_bitmask[i]);
+ //}
+ for (int i=0; i<((BTN_MISC+7)/8); i++) {
+ if (key_bitmask[i] != 0) {
+ device->classes |= CLASS_KEYBOARD;
+ break;
+ }
+ }
+ }
+ if (test_bit(BTN_MOUSE, key_bitmask)) {
+ uint8_t rel_bitmask[(REL_MAX+1)/8];
+ memset(rel_bitmask, 0, sizeof(rel_bitmask));
+ LOGV("Getting relative controllers...");
+ if (ioctl(fd, EVIOCGBIT(EV_REL, sizeof(rel_bitmask)), rel_bitmask) >= 0)
+ {
+ if (test_bit(REL_X, rel_bitmask) && test_bit(REL_Y, rel_bitmask)) {
+ device->classes |= CLASS_TRACKBALL;
+ }
+ }
+ }
+ if (test_bit(BTN_TOUCH, key_bitmask)) {
+ uint8_t abs_bitmask[(ABS_MAX+1)/8];
+ memset(abs_bitmask, 0, sizeof(abs_bitmask));
+ LOGV("Getting absolute controllers...");
+ if (ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(abs_bitmask)), abs_bitmask) >= 0)
+ {
+ if (test_bit(ABS_X, abs_bitmask) && test_bit(ABS_Y, abs_bitmask)) {
+ device->classes |= CLASS_TOUCHSCREEN;
+ }
+ }
+ }
+
+#ifdef EV_SW
+ // figure out the switches this device reports
+ uint8_t sw_bitmask[(SW_MAX+1)/8];
+ memset(sw_bitmask, 0, sizeof(sw_bitmask));
+ if (ioctl(fd, EVIOCGBIT(EV_SW, sizeof(sw_bitmask)), sw_bitmask) >= 0) {
+ for (int i=0; i<EV_SW; i++) {
+ //LOGI("Device 0x%x sw %d: has=%d", device->id, i, test_bit(i, sw_bitmask));
+ if (test_bit(i, sw_bitmask)) {
+ if (mSwitches[i] == 0) {
+ mSwitches[i] = device->id;
+ }
+ }
+ }
+ }
+#endif
+
+ LOGI("New device: path=%s name=%s id=0x%x (of 0x%x) index=%d fd=%d classes=0x%x\n",
+ deviceName, name, device->id, mNumDevicesById, mFDCount, fd, device->classes);
+
+ if ((device->classes&CLASS_KEYBOARD) != 0) {
+ char devname[101];
+ char tmpfn[101];
+ char keylayoutFilename[300];
+
+ // a more descriptive name
+ ioctl(mFDs[mFDCount].fd, EVIOCGNAME(sizeof(devname)-1), devname);
+ devname[sizeof(devname)-1] = 0;
+ device->name = devname;
+
+ // replace all the spaces with underscores
+ strcpy(tmpfn, devname);
+ for (char *p = strchr(tmpfn, ' '); p && *p; p = strchr(tmpfn, ' '))
+ *p = '_';
+
+ // find the .kl file we need for this device
+ const char* root = getenv("ANDROID_ROOT");
+ snprintf(keylayoutFilename, sizeof(keylayoutFilename),
+ "%s/usr/keylayout/%s.kl", root, tmpfn);
+ bool defaultKeymap = false;
+ if (access(keylayoutFilename, R_OK)) {
+ snprintf(keylayoutFilename, sizeof(keylayoutFilename),
+ "%s/usr/keylayout/%s", root, "qwerty.kl");
+ defaultKeymap = true;
+ }
+ device->layoutMap->load(keylayoutFilename);
+
+ // tell the world about the devname (the descriptive name)
+ int32_t publicID;
+ if (!mHaveFirstKeyboard && !defaultKeymap) {
+ publicID = 0;
+ // the built-in keyboard has a well-known device ID of 0,
+ // this device better not go away.
+ mHaveFirstKeyboard = true;
+ mFirstKeyboardId = device->id;
+ } else {
+ publicID = device->id;
+ // ensure mFirstKeyboardId is set to -something-.
+ if (mFirstKeyboardId == 0) {
+ mFirstKeyboardId = device->id;
+ }
+ }
+ char propName[100];
+ sprintf(propName, "hw.keyboards.%u.devname", publicID);
+ property_set(propName, devname);
+
+ LOGI("New keyboard: publicID=%d device->id=%d devname='%s propName='%s' keylayout='%s'\n",
+ publicID, device->id, devname, propName, keylayoutFilename);
+ }
+
+ LOGV("Adding device %s %p at %d, id = %d, classes = 0x%x\n",
+ deviceName, device, mFDCount, devid, device->classes);
+
+ mDevicesById[devid].device = device;
+ device->next = mOpeningDevices;
+ mOpeningDevices = device;
+ mDevices[mFDCount] = device;
+
+ mFDCount++;
+ return 0;
+}
+
+int EventHub::close_device(const char *deviceName)
+{
+ AutoMutex _l(mLock);
+
+ int i;
+ for(i = 1; i < mFDCount; i++) {
+ if(strcmp(mDevices[i]->path.string(), deviceName) == 0) {
+ //LOGD("remove device %d: %s\n", i, deviceName);
+ device_t* device = mDevices[i];
+ int count = mFDCount - i - 1;
+ int index = (device->id&ID_MASK);
+ mDevicesById[index].device = NULL;
+ memmove(mDevices + i, mDevices + i + 1, sizeof(mDevices[0]) * count);
+ memmove(mFDs + i, mFDs + i + 1, sizeof(mFDs[0]) * count);
+
+#ifdef EV_SW
+ for (int j=0; j<EV_SW; j++) {
+ if (mSwitches[j] == device->id) {
+ mSwitches[j] = 0;
+ }
+ }
+#endif
+
+ device->next = mClosingDevices;
+ mClosingDevices = device;
+
+ mFDCount--;
+
+ uint32_t publicID;
+ if (device->id == mFirstKeyboardId) {
+ LOGW("built-in keyboard device %s (id=%d) is closing! the apps will not like this",
+ device->path.string(), mFirstKeyboardId);
+ mFirstKeyboardId = 0;
+ publicID = 0;
+ } else {
+ publicID = device->id;
+ }
+ // clear the property
+ char propName[100];
+ sprintf(propName, "hw.keyboards.%u.devname", publicID);
+ property_set(propName, NULL);
+ return 0;
+ }
+ }
+ LOGE("remote device: %s not found\n", deviceName);
+ return -1;
+}
+
+int EventHub::read_notify(int nfd)
+{
+#ifdef HAVE_INOTIFY
+ int res;
+ char devname[PATH_MAX];
+ char *filename;
+ char event_buf[512];
+ int event_size;
+ int event_pos = 0;
+ struct inotify_event *event;
+
+ res = read(nfd, event_buf, sizeof(event_buf));
+ if(res < (int)sizeof(*event)) {
+ if(errno == EINTR)
+ return 0;
+ LOGW("could not get event, %s\n", strerror(errno));
+ return 1;
+ }
+ //printf("got %d bytes of event information\n", res);
+
+ strcpy(devname, device_path);
+ filename = devname + strlen(devname);
+ *filename++ = '/';
+
+ while(res >= (int)sizeof(*event)) {
+ event = (struct inotify_event *)(event_buf + event_pos);
+ //printf("%d: %08x \"%s\"\n", event->wd, event->mask, event->len ? event->name : "");
+ if(event->len) {
+ strcpy(filename, event->name);
+ if(event->mask & IN_CREATE) {
+ open_device(devname);
+ }
+ else {
+ close_device(devname);
+ }
+ }
+ event_size = sizeof(*event) + event->len;
+ res -= event_size;
+ event_pos += event_size;
+ }
+#endif
+ return 0;
+}
+
+
+int EventHub::scan_dir(const char *dirname)
+{
+ char devname[PATH_MAX];
+ char *filename;
+ DIR *dir;
+ struct dirent *de;
+ dir = opendir(dirname);
+ if(dir == NULL)
+ return -1;
+ strcpy(devname, dirname);
+ filename = devname + strlen(devname);
+ *filename++ = '/';
+ while((de = readdir(dir))) {
+ if(de->d_name[0] == '.' &&
+ (de->d_name[1] == '\0' ||
+ (de->d_name[1] == '.' && de->d_name[2] == '\0')))
+ continue;
+ strcpy(filename, de->d_name);
+ open_device(devname);
+ }
+ closedir(dir);
+ return 0;
+}
+
+}; // namespace android