Use std::filesystem for input event devices scan.
Use std::filesystem directory iterator to scan event devices in EventHub.
Bug: 160010896
Test: atest inputflinger_tests, atest EventHubTest
Change-Id: Ib5658e96783b8a1099fe0a2cb6dda51703045c84
diff --git a/services/inputflinger/reader/Android.bp b/services/inputflinger/reader/Android.bp
index 83a610f..0ccada9 100644
--- a/services/inputflinger/reader/Android.bp
+++ b/services/inputflinger/reader/Android.bp
@@ -81,4 +81,7 @@
export_header_lib_headers: [
"libinputreader_headers",
],
+ static_libs: [
+ "libc++fs"
+ ],
}
diff --git a/services/inputflinger/reader/EventHub.cpp b/services/inputflinger/reader/EventHub.cpp
index 5f1d475..5e590d0 100644
--- a/services/inputflinger/reader/EventHub.cpp
+++ b/services/inputflinger/reader/EventHub.cpp
@@ -34,20 +34,20 @@
#define LOG_TAG "EventHub"
// #define LOG_NDEBUG 0
-
-#include "EventHub.h"
-
#include <android-base/stringprintf.h>
#include <cutils/properties.h>
+#include <input/KeyCharacterMap.h>
+#include <input/KeyLayoutMap.h>
+#include <input/VirtualKeyMap.h>
#include <openssl/sha.h>
#include <utils/Errors.h>
#include <utils/Log.h>
#include <utils/Timers.h>
#include <utils/threads.h>
-#include <input/KeyCharacterMap.h>
-#include <input/KeyLayoutMap.h>
-#include <input/VirtualKeyMap.h>
+#include <filesystem>
+
+#include "EventHub.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
@@ -94,8 +94,8 @@
/**
* Return true if name matches "v4l-touch*"
*/
-static bool isV4lTouchNode(const char* name) {
- return strstr(name, "v4l-touch") == name;
+static bool isV4lTouchNode(std::string name) {
+ return name.find("v4l-touch") != std::string::npos;
}
/**
@@ -810,7 +810,7 @@
return index >= 0 ? mDevices.valueAt(index) : NULL;
}
-EventHub::Device* EventHub::getDeviceByPathLocked(const char* devicePath) const {
+EventHub::Device* EventHub::getDeviceByPathLocked(const std::string& devicePath) const {
for (size_t i = 0; i < mDevices.size(); i++) {
Device* device = mDevices.valueAt(i);
if (device->path == devicePath) {
@@ -1215,14 +1215,14 @@
}
}
-status_t EventHub::openDeviceLocked(const char* devicePath) {
+status_t EventHub::openDeviceLocked(const std::string& devicePath) {
char buffer[80];
- ALOGV("Opening device: %s", devicePath);
+ ALOGV("Opening device: %s", devicePath.c_str());
- int fd = open(devicePath, O_RDWR | O_CLOEXEC | O_NONBLOCK);
+ int fd = open(devicePath.c_str(), O_RDWR | O_CLOEXEC | O_NONBLOCK);
if (fd < 0) {
- ALOGE("could not open %s, %s\n", devicePath, strerror(errno));
+ ALOGE("could not open %s, %s\n", devicePath.c_str(), strerror(errno));
return -1;
}
@@ -1230,7 +1230,7 @@
// Get device name.
if (ioctl(fd, EVIOCGNAME(sizeof(buffer) - 1), &buffer) < 1) {
- ALOGE("Could not get device name for %s: %s", devicePath, strerror(errno));
+ ALOGE("Could not get device name for %s: %s", devicePath.c_str(), strerror(errno));
} else {
buffer[sizeof(buffer) - 1] = '\0';
identifier.name = buffer;
@@ -1240,7 +1240,7 @@
for (size_t i = 0; i < mExcludedDevices.size(); i++) {
const std::string& item = mExcludedDevices[i];
if (identifier.name == item) {
- ALOGI("ignoring event id %s driver %s\n", devicePath, item.c_str());
+ ALOGI("ignoring event id %s driver %s\n", devicePath.c_str(), item.c_str());
close(fd);
return -1;
}
@@ -1249,7 +1249,7 @@
// Get device driver version.
int driverVersion;
if (ioctl(fd, EVIOCGVERSION, &driverVersion)) {
- ALOGE("could not get driver version for %s, %s\n", devicePath, strerror(errno));
+ ALOGE("could not get driver version for %s, %s\n", devicePath.c_str(), strerror(errno));
close(fd);
return -1;
}
@@ -1257,7 +1257,7 @@
// Get device identifier.
struct input_id inputId;
if (ioctl(fd, EVIOCGID, &inputId)) {
- ALOGE("could not get device input id for %s, %s\n", devicePath, strerror(errno));
+ ALOGE("could not get device input id for %s, %s\n", devicePath.c_str(), strerror(errno));
close(fd);
return -1;
}
@@ -1289,7 +1289,7 @@
int32_t deviceId = mNextDeviceId++;
Device* device = new Device(fd, deviceId, devicePath, identifier);
- ALOGV("add device %d: %s\n", deviceId, devicePath);
+ ALOGV("add device %d: %s\n", deviceId, devicePath.c_str());
ALOGV(" bus: %04x\n"
" vendor %04x\n"
" product %04x\n"
@@ -1446,7 +1446,7 @@
// If the device isn't recognized as something we handle, don't monitor it.
if (device->classes == 0) {
- ALOGV("Dropping device: id=%d, path='%s', name='%s'", deviceId, devicePath,
+ ALOGV("Dropping device: id=%d, path='%s', name='%s'", deviceId, devicePath.c_str(),
device->identifier.name.c_str());
delete device;
return -1;
@@ -1492,7 +1492,7 @@
ALOGI("New device: id=%d, fd=%d, path='%s', name='%s', classes=0x%x, "
"configuration='%s', keyLayout='%s', keyCharacterMap='%s', builtinKeyboard=%s, ",
- deviceId, fd, devicePath, device->identifier.name.c_str(), device->classes,
+ deviceId, fd, devicePath.c_str(), device->identifier.name.c_str(), device->classes,
device->configurationFile.c_str(), device->keyMap.keyLayoutFile.c_str(),
device->keyMap.keyCharacterMapFile.c_str(), toString(mBuiltInKeyboardId == deviceId));
@@ -1726,13 +1726,13 @@
return NAME_NOT_FOUND;
}
-void EventHub::closeDeviceByPathLocked(const char* devicePath) {
+void EventHub::closeDeviceByPathLocked(const std::string& devicePath) {
Device* device = getDeviceByPathLocked(devicePath);
if (device) {
closeDeviceLocked(device);
return;
}
- ALOGV("Remove device: %s not found, device may already have been removed.", devicePath);
+ ALOGV("Remove device: %s not found, device may already have been removed.", devicePath.c_str());
}
/**
@@ -1837,16 +1837,16 @@
event = (struct inotify_event*)(event_buf + event_pos);
if (event->len) {
if (event->wd == mInputWd) {
- std::string filename = StringPrintf("%s/%s", DEVICE_PATH, event->name);
+ std::string filename = std::string(DEVICE_PATH) + "/" + event->name;
if (event->mask & IN_CREATE) {
- openDeviceLocked(filename.c_str());
+ openDeviceLocked(filename);
} else {
ALOGI("Removing device '%s' due to inotify event\n", filename.c_str());
- closeDeviceByPathLocked(filename.c_str());
+ closeDeviceByPathLocked(filename);
}
} else if (event->wd == mVideoWd) {
if (isV4lTouchNode(event->name)) {
- std::string filename = StringPrintf("%s/%s", VIDEO_DEVICE_PATH, event->name);
+ std::string filename = std::string(VIDEO_DEVICE_PATH) + "/" + event->name;
if (event->mask & IN_CREATE) {
openVideoDeviceLocked(filename);
} else {
@@ -1865,24 +1865,10 @@
return 0;
}
-status_t EventHub::scanDirLocked(const char* dirname) {
- char devname[PATH_MAX];
- char* filename;
- DIR* dir;
- struct dirent* de;
- dir = opendir(dirname);
- if (dir == nullptr) 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);
- openDeviceLocked(devname);
+status_t EventHub::scanDirLocked(const std::string& dirname) {
+ for (const auto& entry : std::filesystem::directory_iterator(dirname)) {
+ openDeviceLocked(entry.path());
}
- closedir(dir);
return 0;
}
@@ -1890,22 +1876,12 @@
* Look for all dirname/v4l-touch* devices, and open them.
*/
status_t EventHub::scanVideoDirLocked(const std::string& dirname) {
- DIR* dir;
- struct dirent* de;
- dir = opendir(dirname.c_str());
- if (!dir) {
- ALOGE("Could not open video directory %s", dirname.c_str());
- return BAD_VALUE;
- }
-
- while ((de = readdir(dir))) {
- const char* name = de->d_name;
- if (isV4lTouchNode(name)) {
- ALOGI("Found touch video device %s", name);
- openVideoDeviceLocked(dirname + "/" + name);
+ for (const auto& entry : std::filesystem::directory_iterator(dirname)) {
+ if (isV4lTouchNode(entry.path())) {
+ ALOGI("Found touch video device %s", entry.path().c_str());
+ openVideoDeviceLocked(entry.path());
}
}
- closedir(dir);
return OK;
}
diff --git a/services/inputflinger/reader/include/EventHub.h b/services/inputflinger/reader/include/EventHub.h
index c17f3a1..ee62c9a 100644
--- a/services/inputflinger/reader/include/EventHub.h
+++ b/services/inputflinger/reader/include/EventHub.h
@@ -373,13 +373,13 @@
}
};
- status_t openDeviceLocked(const char* devicePath);
+ status_t openDeviceLocked(const std::string& devicePath);
void openVideoDeviceLocked(const std::string& devicePath);
void createVirtualKeyboardLocked();
void addDeviceLocked(Device* device);
void assignDescriptorLocked(InputDeviceIdentifier& identifier);
- void closeDeviceByPathLocked(const char* devicePath);
+ void closeDeviceByPathLocked(const std::string& devicePath);
void closeVideoDeviceByPathLocked(const std::string& devicePath);
void closeDeviceLocked(Device* device);
void closeAllDevicesLocked();
@@ -396,14 +396,14 @@
status_t unregisterDeviceFromEpollLocked(Device* device);
void unregisterVideoDeviceFromEpollLocked(const TouchVideoDevice& videoDevice);
- status_t scanDirLocked(const char* dirname);
+ status_t scanDirLocked(const std::string& dirname);
status_t scanVideoDirLocked(const std::string& dirname);
void scanDevicesLocked();
status_t readNotifyLocked();
Device* getDeviceByDescriptorLocked(const std::string& descriptor) const;
Device* getDeviceLocked(int32_t deviceId) const;
- Device* getDeviceByPathLocked(const char* devicePath) const;
+ Device* getDeviceByPathLocked(const std::string& devicePath) const;
/**
* Look through all available fd's (both for input devices and for video devices),
* and return the device pointer.
diff --git a/services/inputflinger/tests/Android.bp b/services/inputflinger/tests/Android.bp
index eae0963..eb9ac68 100644
--- a/services/inputflinger/tests/Android.bp
+++ b/services/inputflinger/tests/Android.bp
@@ -44,5 +44,8 @@
"frameworks/native/libs/input",
],
},
+ static_libs: [
+ "libc++fs"
+ ],
require_root: true,
}