cadf4ed451
Move common logging related functions to
rotate_logs.cpp, and rename that to logging.cpp.
Test: Recovery works
Bug: 78793464
Change-Id: I00f20a79a296680122b8437d54a87897c5cb2fc7
(cherry picked from commit 3c3f211d1e)
71 lines
2.6 KiB
C++
71 lines
2.6 KiB
C++
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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//
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// Strictly to deal with reboot into system after OTA, then
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// reboot while in system before boot complete landing us back
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// into recovery to continue with any mitigations with retained
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// log history. This simply refreshes the pmsg files from
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// the last pmsg file contents.
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//
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// Usage:
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// recovery-refresh [--force-rotate|--rotate]
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//
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// All file content representing in the recovery/ directory stored in
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// /sys/fs/pstore/pmsg-ramoops-0 in logger format that reside in the
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// LOG_ID_SYSTEM buffer at ANDROID_LOG_INFO priority or higher is
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// refreshed into /dev/pmsg0. This ensures that an unexpected reboot
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// before recovery-persist is run will still contain the associated
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// pmsg Android Logger content.
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//
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// --force-rotate recovery/last_kmsg and recovery.last_log files are
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// rotated with .<number> suffixes upwards.
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// --rotate rotated only if rocovery/last_msg or recovery/last_log
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// exist, otherwise perform 1:1 refresh.
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//
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#include <string.h>
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#include <string>
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#include <private/android_logger.h> /* private pmsg functions */
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#include "logging.h"
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int main(int argc, char **argv) {
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static const char filter[] = "recovery/";
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static const char force_rotate_flag[] = "--force-rotate";
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static const char rotate_flag[] = "--rotate";
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ssize_t ret;
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bool doRotate = false;
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// Take last pmsg contents and rewrite it to the current pmsg session.
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if ((argc <= 1) || !argv[1] ||
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(((doRotate = strcmp(argv[1], rotate_flag))) &&
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strcmp(argv[1], force_rotate_flag))) {
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doRotate = false;
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} else if (!doRotate) {
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// Do we need to rotate?
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__android_log_pmsg_file_read(
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LOG_ID_SYSTEM, ANDROID_LOG_INFO, filter,
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logbasename, &doRotate);
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}
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// Take action to refresh pmsg contents
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ret = __android_log_pmsg_file_read(
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LOG_ID_SYSTEM, ANDROID_LOG_INFO, filter,
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logrotate, &doRotate);
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return (ret < 0) ? ret : 0;
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}
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