diff options
Diffstat (limited to '')
| -rw-r--r-- | Android.bp | 12 | ||||
| -rw-r--r-- | Android.mk | 2 | ||||
| -rw-r--r-- | common.h | 9 | ||||
| -rw-r--r-- | logging.cpp | 243 | ||||
| -rw-r--r-- | logging.h (renamed from rotate_logs.h) | 18 | ||||
| -rw-r--r-- | recovery-persist.cpp | 2 | ||||
| -rw-r--r-- | recovery-refresh.cpp | 2 | ||||
| -rw-r--r-- | recovery.cpp | 134 | ||||
| -rw-r--r-- | recovery_main.cpp | 2 | ||||
| -rw-r--r-- | rotate_logs.cpp | 107 |
10 files changed, 280 insertions, 251 deletions
diff --git a/Android.bp b/Android.bp index 9ad961d5b..22c90bd3e 100644 --- a/Android.bp +++ b/Android.bp @@ -89,8 +89,8 @@ cc_binary { ], srcs: [ + "logging.cpp", "recovery-persist.cpp", - "rotate_logs.cpp", ], shared_libs: [ @@ -98,6 +98,10 @@ cc_binary { "liblog", ], + static_libs: [ + "libotautil", + ], + init_rc: [ "recovery-persist.rc", ], @@ -112,8 +116,8 @@ cc_binary { ], srcs: [ + "logging.cpp", "recovery-refresh.cpp", - "rotate_logs.cpp", ], shared_libs: [ @@ -121,6 +125,10 @@ cc_binary { "liblog", ], + static_libs: [ + "libotautil", + ], + init_rc: [ "recovery-refresh.rc", ], diff --git a/Android.mk b/Android.mk index abe1b838f..afbc950fe 100644 --- a/Android.mk +++ b/Android.mk @@ -126,10 +126,10 @@ LOCAL_SRC_FILES := \ adb_install.cpp \ device.cpp \ fuse_sdcard_provider.cpp \ + logging.cpp \ recovery.cpp \ recovery_main.cpp \ roots.cpp \ - rotate_logs.cpp \ LOCAL_MODULE := recovery @@ -27,7 +27,9 @@ static constexpr int kRecoveryApiVersion = 3; class RecoveryUI; +struct selabel_handle; +extern struct selabel_handle* sehandle; extern RecoveryUI* ui; extern bool modified_flash; @@ -37,13 +39,6 @@ extern std::string stage; // The reason argument provided in "--reason=". extern const char* reason; -// fopen(3)'s the given file, by mounting volumes and making parent dirs as necessary. Returns the -// file pointer, or nullptr on error. -FILE* fopen_path(const std::string& path, const char* mode); - -// In turn fflush(3)'s, fsync(3)'s and fclose(3)'s the given stream. -void check_and_fclose(FILE* fp, const std::string& name); - void ui_print(const char* format, ...) __printflike(1, 2); bool is_ro_debuggable(); diff --git a/logging.cpp b/logging.cpp new file mode 100644 index 000000000..d5af72aad --- /dev/null +++ b/logging.cpp @@ -0,0 +1,243 @@ +/* + * 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 "logging.h" + +#include <stdio.h> +#include <string.h> +#include <sys/klog.h> +#include <sys/types.h> + +#include <string> + +#include <android-base/file.h> +#include <android-base/logging.h> +#include <android-base/parseint.h> +#include <android-base/stringprintf.h> +#include <private/android_filesystem_config.h> /* for AID_SYSTEM */ +#include <private/android_logger.h> /* private pmsg functions */ + +#include "common.h" +#include "otautil/dirutil.h" +#include "otautil/paths.h" +#include "roots.h" + +static constexpr const char* LOG_FILE = "/cache/recovery/log"; +static constexpr const char* LAST_INSTALL_FILE = "/cache/recovery/last_install"; +static constexpr const char* LAST_KMSG_FILE = "/cache/recovery/last_kmsg"; +static constexpr const char* LAST_LOG_FILE = "/cache/recovery/last_log"; + +static const std::string LAST_KMSG_FILTER = "recovery/last_kmsg"; +static const std::string LAST_LOG_FILTER = "recovery/last_log"; + +// 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) { + if (ensure_path_mounted(path.c_str()) != 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 (LAST_KMSG_FILTER.find(filename) != std::string::npos || + 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 (LAST_KMSG_FILTER.find(sub) == std::string::npos && + 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; +} + +void copy_log_file(const std::string& source, const std::string& destination, bool append) { + FILE* dest_fp = fopen_path(destination, append ? "ae" : "we"); + 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 modified_flash, bool has_cache) { + // We only rotate and record the log of the current session if there are actual attempts to modify + // the flash, such as wipes, installs 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 (!modified_flash) { + 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 (!has_cache) { + 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); + 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); +} diff --git a/rotate_logs.h b/logging.h index 007c33d44..3cfbc7af6 100644 --- a/rotate_logs.h +++ b/logging.h @@ -14,12 +14,14 @@ * limitations under the License. */ -#ifndef _ROTATE_LOGS_H -#define _ROTATE_LOGS_H +#ifndef _LOGGING_H +#define _LOGGING_H #include <stddef.h> #include <sys/types.h> +#include <string> + #include <log/log_id.h> static constexpr int KEEP_LOG_COUNT = 10; @@ -35,4 +37,14 @@ ssize_t logrotate(log_id_t id, char prio, const char* filename, const char* buf, // Overwrite any existing last_log.$max and last_kmsg.$max. void rotate_logs(const char* last_log_file, const char* last_kmsg_file); -#endif //_ROTATE_LOG_H +// In turn fflush(3)'s, fsync(3)'s and fclose(3)'s the given stream. +void check_and_fclose(FILE* fp, const std::string& name); + +void copy_log_file_to_pmsg(const std::string& source, const std::string& destination); +void copy_log_file(const std::string& source, const std::string& destination, bool append); +void copy_logs(bool modified_flash, bool has_cache); +void reset_tmplog_offset(); + +void save_kernel_log(const char* destination); + +#endif //_LOGGING_H diff --git a/recovery-persist.cpp b/recovery-persist.cpp index dbce7ff74..d3ade6260 100644 --- a/recovery-persist.cpp +++ b/recovery-persist.cpp @@ -41,7 +41,7 @@ #include <android-base/logging.h> #include <private/android_logger.h> /* private pmsg functions */ -#include "rotate_logs.h" +#include "logging.h" static const char *LAST_LOG_FILE = "/data/misc/recovery/last_log"; static const char *LAST_PMSG_FILE = "/sys/fs/pstore/pmsg-ramoops-0"; diff --git a/recovery-refresh.cpp b/recovery-refresh.cpp index 14565d3f4..aee1ca592 100644 --- a/recovery-refresh.cpp +++ b/recovery-refresh.cpp @@ -42,7 +42,7 @@ #include <private/android_logger.h> /* private pmsg functions */ -#include "rotate_logs.h" +#include "logging.h" int main(int argc, char **argv) { static const char filter[] = "recovery/"; diff --git a/recovery.cpp b/recovery.cpp index 7219771cb..2ff7f1d9e 100644 --- a/recovery.cpp +++ b/recovery.cpp @@ -29,7 +29,6 @@ #include <stdio.h> #include <stdlib.h> #include <string.h> -#include <sys/klog.h> #include <sys/stat.h> #include <sys/types.h> #include <sys/wait.h> @@ -53,8 +52,6 @@ #include <cutils/android_reboot.h> #include <cutils/properties.h> /* for property_list */ #include <healthd/BatteryMonitor.h> -#include <private/android_filesystem_config.h> /* for AID_SYSTEM */ -#include <private/android_logger.h> /* private pmsg functions */ #include <selinux/android.h> #include <selinux/label.h> #include <selinux/selinux.h> @@ -66,21 +63,19 @@ #include "fuse_sdcard_provider.h" #include "fuse_sideload.h" #include "install.h" +#include "logging.h" #include "minui/minui.h" #include "otautil/dirutil.h" #include "otautil/error_code.h" #include "otautil/paths.h" #include "otautil/sysutil.h" #include "roots.h" -#include "rotate_logs.h" #include "screen_ui.h" #include "stub_ui.h" #include "ui.h" static constexpr const char* CACHE_LOG_DIR = "/cache/recovery"; static constexpr const char* COMMAND_FILE = "/cache/recovery/command"; -static constexpr const char* LOG_FILE = "/cache/recovery/log"; -static constexpr const char* LAST_INSTALL_FILE = "/cache/recovery/last_install"; static constexpr const char* LAST_KMSG_FILE = "/cache/recovery/last_kmsg"; static constexpr const char* LAST_LOG_FILE = "/cache/recovery/last_log"; static constexpr const char* LOCALE_FILE = "/cache/recovery/last_locale"; @@ -149,31 +144,6 @@ struct selabel_handle* sehandle; * 7b. the user reboots (pulling the battery, etc) into the main system */ -FILE* fopen_path(const std::string& path, const char* mode) { - if (ensure_path_mounted(path.c_str()) != 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); -} - bool is_ro_debuggable() { return android::base::GetBoolProperty("ro.debuggable", false); } @@ -259,98 +229,6 @@ static void set_sdcard_update_bootloader_message() { } } -// Read from kernel log into buffer and write out to file. -static 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); -} - -// 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()); -} - -static 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; - -static void copy_log_file(const std::string& source, const std::string& destination, bool append) { - FILE* dest_fp = fopen_path(destination, append ? "ae" : "we"); - 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); - } -} - -static void copy_logs() { - // We only rotate and record the log of the current session if there are actual attempts to modify - // the flash, such as wipes, installs 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 (!modified_flash) { - 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 (!has_cache) { - 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); - sync(); -} - // Clear the recovery command and prepare to boot a (hopefully working) system, // copy our log file to cache as well (for the system to read). This function is // idempotent: call it as many times as you like. @@ -366,7 +244,7 @@ static void finish_recovery() { } } - copy_logs(); + copy_logs(modified_flash, has_cache); // Reset to normal system boot so recovery won't cycle indefinitely. std::string err; @@ -482,8 +360,8 @@ static bool erase_volume(const char* volume) { // 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. - tmplog_offset = 0; - copy_logs(); + reset_tmplog_offset(); + copy_logs(modified_flash, has_cache); } return (result == 0); @@ -1000,7 +878,7 @@ static Device::BuiltinAction prompt_and_wait(Device* device, int status) { if (status != INSTALL_SUCCESS) { ui->SetBackground(RecoveryUI::ERROR); ui->Print("Installation aborted.\n"); - copy_logs(); + copy_logs(modified_flash, has_cache); } else if (!ui->IsTextVisible()) { return Device::NO_ACTION; // reboot if logs aren't visible } else { @@ -1374,7 +1252,7 @@ int start_recovery(int argc, char** argv) { // RETRY_LIMIT times before we abandon this OTA update. static constexpr int RETRY_LIMIT = 4; if (status == INSTALL_RETRY && retry_count < RETRY_LIMIT) { - copy_logs(); + copy_logs(modified_flash, has_cache); retry_count += 1; set_retry_bootloader_message(retry_count, args); // Print retry count on screen. diff --git a/recovery_main.cpp b/recovery_main.cpp index 9f579f7cd..3147511ee 100644 --- a/recovery_main.cpp +++ b/recovery_main.cpp @@ -24,10 +24,10 @@ #include <private/android_logger.h> /* private pmsg functions */ #include "common.h" +#include "logging.h" #include "minadbd/minadbd.h" #include "otautil/paths.h" #include "private/recovery.h" -#include "rotate_logs.h" #include "ui.h" static void UiLogger(android::base::LogId /* id */, android::base::LogSeverity severity, diff --git a/rotate_logs.cpp b/rotate_logs.cpp deleted file mode 100644 index da008792c..000000000 --- a/rotate_logs.cpp +++ /dev/null @@ -1,107 +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 "rotate_logs.h" - -#include <stdio.h> -#include <string.h> -#include <sys/types.h> - -#include <string> - -#include <android-base/file.h> -#include <android-base/logging.h> -#include <android-base/parseint.h> -#include <android-base/stringprintf.h> -#include <private/android_logger.h> /* private pmsg functions */ - -static const std::string LAST_KMSG_FILTER = "recovery/last_kmsg"; -static const std::string LAST_LOG_FILTER = "recovery/last_log"; - -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 (LAST_KMSG_FILTER.find(filename) != std::string::npos || - 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 (LAST_KMSG_FILTER.find(sub) == std::string::npos && - 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()); - } -} |