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-rw-r--r--otautil/logging.cpp324
1 files changed, 0 insertions, 324 deletions
diff --git a/otautil/logging.cpp b/otautil/logging.cpp
deleted file mode 100644
index 3db0e8ac2..000000000
--- a/otautil/logging.cpp
+++ /dev/null
@@ -1,324 +0,0 @@
-/*
- * Copyright (C) 2016 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.
- */
-
-#include "otautil/logging.h"
-
-#include <dirent.h>
-#include <errno.h>
-#include <stdio.h>
-#include <string.h>
-#include <sys/klog.h>
-#include <sys/types.h>
-
-#include <algorithm>
-#include <memory>
-#include <string>
-
-#include <android-base/file.h>
-#include <android-base/logging.h>
-#include <android-base/parseint.h>
-#include <android-base/stringprintf.h>
-#include <android-base/unique_fd.h>
-#include <private/android_filesystem_config.h> /* for AID_SYSTEM */
-#include <private/android_logger.h> /* private pmsg functions */
-#include <selinux/label.h>
-
-#include "otautil/dirutil.h"
-#include "otautil/paths.h"
-#include "otautil/roots.h"
-
-constexpr const char* LOG_FILE = "/cache/recovery/log";
-constexpr const char* LAST_INSTALL_FILE = "/cache/recovery/last_install";
-constexpr const char* LAST_KMSG_FILE = "/cache/recovery/last_kmsg";
-constexpr const char* LAST_LOG_FILE = "/cache/recovery/last_log";
-
-constexpr const char* LAST_KMSG_FILTER = "recovery/last_kmsg";
-constexpr const char* LAST_LOG_FILTER = "recovery/last_log";
-
-constexpr const char* CACHE_LOG_DIR = "/cache/recovery";
-
-static struct selabel_handle* logging_sehandle;
-
-void SetLoggingSehandle(selabel_handle* handle) {
- logging_sehandle = handle;
-}
-
-// fopen(3)'s the given file, by mounting volumes and making parent dirs as necessary. Returns the
-// file pointer, or nullptr on error.
-static FILE* fopen_path(const std::string& path, const char* mode, const selabel_handle* sehandle) {
- if (ensure_path_mounted(path) != 0) {
- LOG(ERROR) << "Can't mount " << path;
- return nullptr;
- }
-
- // When writing, try to create the containing directory, if necessary. Use generous permissions,
- // the system (init.rc) will reset them.
- if (strchr("wa", mode[0])) {
- mkdir_recursively(path, 0777, true, sehandle);
- }
- return fopen(path.c_str(), mode);
-}
-
-void check_and_fclose(FILE* fp, const std::string& name) {
- fflush(fp);
- if (fsync(fileno(fp)) == -1) {
- PLOG(ERROR) << "Failed to fsync " << name;
- }
- if (ferror(fp)) {
- PLOG(ERROR) << "Error in " << name;
- }
- fclose(fp);
-}
-
-// close a file, log an error if the error indicator is set
-ssize_t logbasename(log_id_t /* id */, char /* prio */, const char* filename, const char* /* buf */,
- size_t len, void* arg) {
- bool* do_rotate = static_cast<bool*>(arg);
- if (std::string(LAST_KMSG_FILTER).find(filename) != std::string::npos ||
- std::string(LAST_LOG_FILTER).find(filename) != std::string::npos) {
- *do_rotate = true;
- }
- return len;
-}
-
-ssize_t logrotate(log_id_t id, char prio, const char* filename, const char* buf, size_t len,
- void* arg) {
- bool* do_rotate = static_cast<bool*>(arg);
- if (!*do_rotate) {
- return __android_log_pmsg_file_write(id, prio, filename, buf, len);
- }
-
- std::string name(filename);
- size_t dot = name.find_last_of('.');
- std::string sub = name.substr(0, dot);
-
- if (std::string(LAST_KMSG_FILTER).find(sub) == std::string::npos &&
- std::string(LAST_LOG_FILTER).find(sub) == std::string::npos) {
- return __android_log_pmsg_file_write(id, prio, filename, buf, len);
- }
-
- // filename rotation
- if (dot == std::string::npos) {
- name += ".1";
- } else {
- std::string number = name.substr(dot + 1);
- if (!isdigit(number[0])) {
- name += ".1";
- } else {
- size_t i;
- if (!android::base::ParseUint(number, &i)) {
- LOG(ERROR) << "failed to parse uint in " << number;
- return -1;
- }
- name = sub + "." + std::to_string(i + 1);
- }
- }
-
- return __android_log_pmsg_file_write(id, prio, name.c_str(), buf, len);
-}
-
-// Rename last_log -> last_log.1 -> last_log.2 -> ... -> last_log.$max.
-// Similarly rename last_kmsg -> last_kmsg.1 -> ... -> last_kmsg.$max.
-// Overwrite any existing last_log.$max and last_kmsg.$max.
-void rotate_logs(const char* last_log_file, const char* last_kmsg_file) {
- // Logs should only be rotated once.
- static bool rotated = false;
- if (rotated) {
- return;
- }
- rotated = true;
-
- for (int i = KEEP_LOG_COUNT - 1; i >= 0; --i) {
- std::string old_log = android::base::StringPrintf("%s", last_log_file);
- if (i > 0) {
- old_log += "." + std::to_string(i);
- }
- std::string new_log = android::base::StringPrintf("%s.%d", last_log_file, i + 1);
- // Ignore errors if old_log doesn't exist.
- rename(old_log.c_str(), new_log.c_str());
-
- std::string old_kmsg = android::base::StringPrintf("%s", last_kmsg_file);
- if (i > 0) {
- old_kmsg += "." + std::to_string(i);
- }
- std::string new_kmsg = android::base::StringPrintf("%s.%d", last_kmsg_file, i + 1);
- rename(old_kmsg.c_str(), new_kmsg.c_str());
- }
-}
-
-// Writes content to the current pmsg session.
-static ssize_t __pmsg_write(const std::string& filename, const std::string& buf) {
- return __android_log_pmsg_file_write(LOG_ID_SYSTEM, ANDROID_LOG_INFO, filename.c_str(),
- buf.data(), buf.size());
-}
-
-void copy_log_file_to_pmsg(const std::string& source, const std::string& destination) {
- std::string content;
- android::base::ReadFileToString(source, &content);
- __pmsg_write(destination, content);
-}
-
-// How much of the temp log we have copied to the copy in cache.
-static off_t tmplog_offset = 0;
-
-void reset_tmplog_offset() {
- tmplog_offset = 0;
-}
-
-static void copy_log_file(const std::string& source, const std::string& destination, bool append) {
- FILE* dest_fp = fopen_path(destination, append ? "ae" : "we", logging_sehandle);
- if (dest_fp == nullptr) {
- PLOG(ERROR) << "Can't open " << destination;
- } else {
- FILE* source_fp = fopen(source.c_str(), "re");
- if (source_fp != nullptr) {
- if (append) {
- fseeko(source_fp, tmplog_offset, SEEK_SET); // Since last write
- }
- char buf[4096];
- size_t bytes;
- while ((bytes = fread(buf, 1, sizeof(buf), source_fp)) != 0) {
- fwrite(buf, 1, bytes, dest_fp);
- }
- if (append) {
- tmplog_offset = ftello(source_fp);
- }
- check_and_fclose(source_fp, source);
- }
- check_and_fclose(dest_fp, destination);
- }
-}
-
-void copy_logs(bool save_current_log) {
- // We only rotate and record the log of the current session if explicitly requested. This usually
- // happens after wipes, installation from BCB or menu selections. This is to avoid unnecessary
- // rotation (and possible deletion) of log files, if it does not do anything loggable.
- if (!save_current_log) {
- return;
- }
-
- // Always write to pmsg, this allows the OTA logs to be caught in `logcat -L`.
- copy_log_file_to_pmsg(Paths::Get().temporary_log_file(), LAST_LOG_FILE);
- copy_log_file_to_pmsg(Paths::Get().temporary_install_file(), LAST_INSTALL_FILE);
-
- // We can do nothing for now if there's no /cache partition.
- if (!HasCache()) {
- return;
- }
-
- ensure_path_mounted(LAST_LOG_FILE);
- ensure_path_mounted(LAST_KMSG_FILE);
- rotate_logs(LAST_LOG_FILE, LAST_KMSG_FILE);
-
- // Copy logs to cache so the system can find out what happened.
- copy_log_file(Paths::Get().temporary_log_file(), LOG_FILE, true);
- copy_log_file(Paths::Get().temporary_log_file(), LAST_LOG_FILE, false);
- copy_log_file(Paths::Get().temporary_install_file(), LAST_INSTALL_FILE, false);
- save_kernel_log(LAST_KMSG_FILE);
- chmod(LOG_FILE, 0600);
- chown(LOG_FILE, AID_SYSTEM, AID_SYSTEM);
- chmod(LAST_KMSG_FILE, 0600);
- chown(LAST_KMSG_FILE, AID_SYSTEM, AID_SYSTEM);
- chmod(LAST_LOG_FILE, 0640);
- chmod(LAST_INSTALL_FILE, 0644);
- chown(LAST_INSTALL_FILE, AID_SYSTEM, AID_SYSTEM);
- sync();
-}
-
-// Read from kernel log into buffer and write out to file.
-void save_kernel_log(const char* destination) {
- int klog_buf_len = klogctl(KLOG_SIZE_BUFFER, 0, 0);
- if (klog_buf_len <= 0) {
- PLOG(ERROR) << "Error getting klog size";
- return;
- }
-
- std::string buffer(klog_buf_len, 0);
- int n = klogctl(KLOG_READ_ALL, &buffer[0], klog_buf_len);
- if (n == -1) {
- PLOG(ERROR) << "Error in reading klog";
- return;
- }
- buffer.resize(n);
- android::base::WriteStringToFile(buffer, destination);
-}
-
-std::vector<saved_log_file> ReadLogFilesToMemory() {
- ensure_path_mounted("/cache");
-
- struct dirent* de;
- std::unique_ptr<DIR, decltype(&closedir)> d(opendir(CACHE_LOG_DIR), closedir);
- if (!d) {
- if (errno != ENOENT) {
- PLOG(ERROR) << "Failed to opendir " << CACHE_LOG_DIR;
- }
- return {};
- }
-
- std::vector<saved_log_file> log_files;
- while ((de = readdir(d.get())) != nullptr) {
- if (strncmp(de->d_name, "last_", 5) == 0 || strcmp(de->d_name, "log") == 0) {
- std::string path = android::base::StringPrintf("%s/%s", CACHE_LOG_DIR, de->d_name);
-
- struct stat sb;
- if (stat(path.c_str(), &sb) != 0) {
- PLOG(ERROR) << "Failed to stat " << path;
- continue;
- }
- // Truncate files to 512kb
- size_t read_size = std::min<size_t>(sb.st_size, 1 << 19);
- std::string data(read_size, '\0');
-
- android::base::unique_fd log_fd(TEMP_FAILURE_RETRY(open(path.c_str(), O_RDONLY)));
- if (log_fd == -1 || !android::base::ReadFully(log_fd, data.data(), read_size)) {
- PLOG(ERROR) << "Failed to read log file " << path;
- continue;
- }
-
- log_files.emplace_back(saved_log_file{ path, sb, data });
- }
- }
-
- return log_files;
-}
-
-bool RestoreLogFilesAfterFormat(const std::vector<saved_log_file>& log_files) {
- // Re-create the log dir and write back the log entries.
- if (ensure_path_mounted(CACHE_LOG_DIR) != 0) {
- PLOG(ERROR) << "Failed to mount " << CACHE_LOG_DIR;
- return false;
- }
-
- if (mkdir_recursively(CACHE_LOG_DIR, 0777, false, logging_sehandle) != 0) {
- PLOG(ERROR) << "Failed to create " << CACHE_LOG_DIR;
- return false;
- }
-
- for (const auto& log : log_files) {
- if (!android::base::WriteStringToFile(log.data, log.name, log.sb.st_mode, log.sb.st_uid,
- log.sb.st_gid)) {
- PLOG(ERROR) << "Failed to write to " << log.name;
- }
- }
-
- // Any part of the log we'd copied to cache is now gone.
- // Reset the pointer so we copy from the beginning of the temp
- // log.
- reset_tmplog_offset();
- copy_logs(true /* save_current_log */);
-
- return true;
-}
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