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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define DEBUG true // STOPSHIP if true
#include "Log.h"
#include "storage/StorageManager.h"
#include "android-base/stringprintf.h"
#include <android-base/file.h>
#include <dirent.h>
using android::util::FIELD_COUNT_REPEATED;
using android::util::FIELD_TYPE_MESSAGE;
namespace android {
namespace os {
namespace statsd {
#define STATS_SERVICE_DIR "/data/misc/stats-service"
// for ConfigMetricsReportList
const int FIELD_ID_REPORTS = 2;
using android::base::StringPrintf;
using std::unique_ptr;
void StorageManager::writeFile(const char* file, const void* buffer, int numBytes) {
int fd = open(file, O_WRONLY | O_CREAT | O_CLOEXEC, S_IRUSR | S_IWUSR);
if (fd == -1) {
VLOG("Attempt to access %s but failed", file);
return;
}
int result = write(fd, buffer, numBytes);
if (result == numBytes) {
VLOG("Successfully wrote %s", file);
} else {
VLOG("Failed to write %s", file);
}
close(fd);
}
void StorageManager::deleteFile(const char* file) {
if (remove(file) != 0) {
VLOG("Attempt to delete %s but is not found", file);
} else {
VLOG("Successfully deleted %s", file);
}
}
void StorageManager::deleteAllFiles(const char* path) {
unique_ptr<DIR, decltype(&closedir)> dir(opendir(path), closedir);
if (dir == NULL) {
VLOG("Directory does not exist: %s", path);
return;
}
dirent* de;
while ((de = readdir(dir.get()))) {
char* name = de->d_name;
if (name[0] == '.') continue;
deleteFile(StringPrintf("%s/%s", path, name).c_str());
}
}
void StorageManager::deletePrefixedFiles(const char* path, const char* prefix) {
unique_ptr<DIR, decltype(&closedir)> dir(opendir(path), closedir);
if (dir == NULL) {
VLOG("Directory does not exist: %s", path);
return;
}
dirent* de;
while ((de = readdir(dir.get()))) {
char* name = de->d_name;
if (name[0] == '.' || strncmp(name, prefix, strlen(prefix)) != 0) {
continue;
}
deleteFile(StringPrintf("%s/%s", path, name).c_str());
}
}
void StorageManager::sendBroadcast(const char* path,
const std::function<void(const ConfigKey&)>& sendBroadcast) {
unique_ptr<DIR, decltype(&closedir)> dir(opendir(path), closedir);
if (dir == NULL) {
VLOG("no stats-data directory on disk");
return;
}
dirent* de;
while ((de = readdir(dir.get()))) {
char* name = de->d_name;
if (name[0] == '.') continue;
VLOG("file %s", name);
int index = 0;
int uid = 0;
string configName;
char* substr = strtok(name, "-");
// Timestamp lives at index 2 but we skip parsing it as it's not needed.
while (substr != nullptr && index < 2) {
if (index) {
uid = atoi(substr);
} else {
configName = substr;
}
index++;
}
if (index < 2) continue;
sendBroadcast(ConfigKey(uid, configName));
}
}
void StorageManager::appendConfigMetricsReport(const char* path, ProtoOutputStream& proto) {
unique_ptr<DIR, decltype(&closedir)> dir(opendir(path), closedir);
if (dir == NULL) {
VLOG("Path %s does not exist", path);
return;
}
dirent* de;
while ((de = readdir(dir.get()))) {
char* name = de->d_name;
if (name[0] == '.') continue;
VLOG("file %s", name);
int index = 0;
int uid = 0;
string configName;
char* substr = strtok(name, "-");
// Timestamp lives at index 2 but we skip parsing it as it's not needed.
while (substr != nullptr && index < 2) {
if (index) {
uid = atoi(substr);
} else {
configName = substr;
}
index++;
}
if (index < 2) continue;
string file_name = StringPrintf("%s/%s", path, name);
int fd = open(file_name.c_str(), O_RDONLY | O_CLOEXEC);
if (fd != -1) {
string content;
if (android::base::ReadFdToString(fd, &content)) {
proto.write(FIELD_TYPE_MESSAGE | FIELD_COUNT_REPEATED | FIELD_ID_REPORTS,
content.c_str());
}
close(fd);
}
// Remove file from disk after reading.
remove(file_name.c_str());
}
}
void StorageManager::readConfigFromDisk(unordered_map<ConfigKey, StatsdConfig>& configsMap) {
unique_ptr<DIR, decltype(&closedir)> dir(opendir(STATS_SERVICE_DIR), closedir);
if (dir == NULL) {
VLOG("no default config on disk");
return;
}
dirent* de;
while ((de = readdir(dir.get()))) {
char* name = de->d_name;
if (name[0] == '.') continue;
VLOG("file %s", name);
int index = 0;
int uid = 0;
string configName;
char* substr = strtok(name, "-");
// Timestamp lives at index 2 but we skip parsing it as it's not needed.
while (substr != nullptr && index < 2) {
if (index) {
uid = atoi(substr);
} else {
configName = substr;
}
index++;
}
if (index < 2) continue;
string file_name = StringPrintf("%s/%s", STATS_SERVICE_DIR, name);
VLOG("full file %s", file_name.c_str());
int fd = open(file_name.c_str(), O_RDONLY | O_CLOEXEC);
if (fd != -1) {
string content;
if (android::base::ReadFdToString(fd, &content)) {
StatsdConfig config;
if (config.ParseFromString(content)) {
configsMap[ConfigKey(uid, configName)] = config;
VLOG("map key uid=%d|name=%s", uid, name);
}
}
close(fd);
}
}
}
} // namespace statsd
} // namespace os
} // namespace android
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