Merge "recovery: Refactor logging code into logging.cpp"
diff --git a/Android.bp b/Android.bp
index 9ad961d..22c90bd 100644
--- a/Android.bp
+++ b/Android.bp
@@ -89,8 +89,8 @@
],
srcs: [
+ "logging.cpp",
"recovery-persist.cpp",
- "rotate_logs.cpp",
],
shared_libs: [
@@ -98,6 +98,10 @@
"liblog",
],
+ static_libs: [
+ "libotautil",
+ ],
+
init_rc: [
"recovery-persist.rc",
],
@@ -112,8 +116,8 @@
],
srcs: [
+ "logging.cpp",
"recovery-refresh.cpp",
- "rotate_logs.cpp",
],
shared_libs: [
@@ -121,6 +125,10 @@
"liblog",
],
+ static_libs: [
+ "libotautil",
+ ],
+
init_rc: [
"recovery-refresh.rc",
],
diff --git a/Android.mk b/Android.mk
index abe1b83..afbc950 100644
--- a/Android.mk
+++ b/Android.mk
@@ -126,10 +126,10 @@
adb_install.cpp \
device.cpp \
fuse_sdcard_provider.cpp \
+ logging.cpp \
recovery.cpp \
recovery_main.cpp \
roots.cpp \
- rotate_logs.cpp \
LOCAL_MODULE := recovery
diff --git a/common.h b/common.h
index de536fd..3dc36a9 100644
--- a/common.h
+++ b/common.h
@@ -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 @@
// 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 0000000..d5af72a
--- /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
similarity index 70%
rename from rotate_logs.h
rename to logging.h
index 007c33d..3cfbc7a 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 @@
// 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 dbce7ff..d3ade62 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 14565d3..aee1ca5 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 7219771..2ff7f1d 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 @@
* 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 @@
}
}
-// 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 @@
}
}
- 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 @@
// 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 @@
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 @@
// 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 9f579f7..3147511 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 da00879..0000000
--- 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());
- }
-}