Alexander Potapenko | 93b854f | 2022-02-07 19:22:52 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2022, The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include <sys/epoll.h> |
| 18 | #include <sys/types.h> |
| 19 | #include <unistd.h> |
| 20 | |
| 21 | #include <array> |
| 22 | #include <set> |
| 23 | #include <string> |
| 24 | |
| 25 | #include <android/os/DropBoxManager.h> |
| 26 | |
| 27 | #include <android-base/file.h> |
| 28 | #include <android-base/logging.h> |
| 29 | #include <android-base/properties.h> |
| 30 | #include <android-base/strings.h> |
| 31 | |
| 32 | #include "dmesg_parser.h" |
| 33 | |
| 34 | // If there are too many reports, the device is horribly broken. |
| 35 | const unsigned int kMaxReports = 10; |
| 36 | |
| 37 | const char kSentPath[] = "/data/misc/dmesgd/sent_reports.txt"; |
| 38 | |
| 39 | static std::set<std::string> ReadSentReports() { |
| 40 | std::set<std::string> ret; |
| 41 | std::string content; |
| 42 | if (!android::base::ReadFileToString(kSentPath, &content)) { |
| 43 | PLOG(ERROR) << kSentPath << " is empty"; |
| 44 | return ret; |
| 45 | } |
| 46 | auto lines = android::base::Split(content, "\n"); |
| 47 | for (auto line : lines) { |
| 48 | ret.insert(line); |
| 49 | } |
| 50 | LOG(ERROR) << "Read " << ret.size() << " records from " << kSentPath; |
| 51 | return ret; |
| 52 | } |
| 53 | |
| 54 | static void WriteSentReports(std::set<std::string> reports) { |
| 55 | if (!android::base::WriteStringToFile(android::base::Join(reports, ""), kSentPath)) { |
| 56 | PLOG(ERROR) << "Failed to write to " << kSentPath; |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | const char kUnknown[] = "UNKNOWN"; |
| 61 | |
| 62 | static std::string GetOneBootHeader(const std::string& pretty, const std::string& pname) { |
| 63 | return pretty + ": " + android::base::GetProperty(pname, kUnknown) + "\n"; |
| 64 | }; |
| 65 | |
| 66 | static std::string GetBootHeaders() { |
| 67 | std::string ret = GetOneBootHeader("Build", "ro.build.fingerprint"); |
| 68 | ret += GetOneBootHeader("Hardware", "ro.product.board"); |
| 69 | ret += GetOneBootHeader("Revision", "ro.revision"); |
| 70 | ret += GetOneBootHeader("Bootloader", "ro.bootloader"); |
| 71 | ret += GetOneBootHeader("Radio", "gsm.version.baseband"); |
| 72 | |
| 73 | std::string version; |
| 74 | if (!android::base::ReadFileToString("/proc/version", &version)) version = kUnknown; |
| 75 | ret += "Kernel: " + version + "\n\n"; |
| 76 | return ret; |
| 77 | } |
| 78 | |
| 79 | static bool StoreReport(const std::string& tag, const std::string& report) { |
| 80 | std::string boot_headers = GetBootHeaders(); |
| 81 | android::sp<android::os::DropBoxManager> dropbox(new android::os::DropBoxManager()); |
| 82 | auto status = dropbox->addText(android::String16(tag.c_str()), boot_headers + report); |
| 83 | if (!status.isOk()) { |
| 84 | LOG(ERROR) << "Dropbox failed"; |
| 85 | return false; |
| 86 | } |
| 87 | return true; |
| 88 | } |
| 89 | |
| 90 | static int ProcessDmesg(std::set<std::string> &sent_reports) { |
| 91 | std::unique_ptr<FILE, decltype(&pclose)> pipe(popen("dmesg", "r"), pclose); |
| 92 | if (!pipe) { |
| 93 | PLOG(ERROR) << "popen() failed!"; |
| 94 | return 1; |
| 95 | } |
| 96 | dmesg_parser::DmesgParser dmesg_parser; |
| 97 | |
| 98 | char* buffer = NULL; |
| 99 | size_t buffer_size = 0; |
| 100 | while (getline(&buffer, &buffer_size, pipe.get()) != -1) { |
| 101 | std::string line(buffer); |
| 102 | if (line.back() != '\n') line += "\n"; |
| 103 | dmesg_parser.ProcessLine(line); |
| 104 | if (dmesg_parser.ReportReady()) { |
| 105 | std::string tag = "SYSTEM_" + dmesg_parser.ReportType() + "_ERROR_REPORT"; |
| 106 | std::string title = dmesg_parser.ReportTitle(); |
| 107 | if ((sent_reports.find(title) == sent_reports.end()) && |
| 108 | (sent_reports.size() < kMaxReports)) { |
| 109 | if (StoreReport(tag, dmesg_parser.FlushReport())) sent_reports.insert(title); |
| 110 | } |
| 111 | } |
| 112 | } |
| 113 | free(buffer); |
| 114 | return 0; |
| 115 | } |
| 116 | |
| 117 | int main(int, char*[]) { |
| 118 | auto sent_reports = ReadSentReports(); |
| 119 | int result = ProcessDmesg(sent_reports); |
| 120 | WriteSentReports(sent_reports); |
| 121 | return result; |
| 122 | } |