1169 lines
45 KiB
C++
1169 lines
45 KiB
C++
/*
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* Copyright (C) 2006-2017 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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#include <ctype.h>
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#include <dirent.h>
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#include <errno.h>
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#include <error.h>
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#include <fcntl.h>
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#include <getopt.h>
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#include <math.h>
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#include <sched.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/cdefs.h>
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#include <sys/ioctl.h>
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#include <sys/resource.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <time.h>
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#include <unistd.h>
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#include <memory>
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#include <regex>
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#include <string>
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#include <utility>
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#include <vector>
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#include <android-base/file.h>
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#include <android-base/macros.h>
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#include <android-base/parseint.h>
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#include <android-base/properties.h>
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#include <android-base/stringprintf.h>
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#include <android-base/strings.h>
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#include <android-base/unique_fd.h>
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#include <android/log.h>
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#include <log/event_tag_map.h>
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#include <log/log_id.h>
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#include <log/logprint.h>
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#include <private/android_logger.h>
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#include <processgroup/sched_policy.h>
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#include <system/thread_defs.h>
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#define DEFAULT_MAX_ROTATED_LOGS 4
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using android::base::Join;
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using android::base::ParseByteCount;
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using android::base::ParseUint;
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using android::base::Split;
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using android::base::StringPrintf;
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class Logcat {
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public:
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int Run(int argc, char** argv);
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private:
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void RotateLogs();
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void ProcessBuffer(struct log_msg* buf);
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void PrintDividers(log_id_t log_id, bool print_dividers);
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void SetupOutputAndSchedulingPolicy(bool blocking);
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int SetLogFormat(const char* format_string);
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// Used for all options
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android::base::unique_fd output_fd_{dup(STDOUT_FILENO)};
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std::unique_ptr<AndroidLogFormat, decltype(&android_log_format_free)> logformat_{
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android_log_format_new(), &android_log_format_free};
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// For logging to a file and log rotation
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const char* output_file_name_ = nullptr;
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size_t log_rotate_size_kb_ = 0; // 0 means "no log rotation"
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size_t max_rotated_logs_ = DEFAULT_MAX_ROTATED_LOGS; // 0 means "unbounded"
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size_t out_byte_count_ = 0;
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// For binary log buffers
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int print_binary_ = 0;
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std::unique_ptr<EventTagMap, decltype(&android_closeEventTagMap)> event_tag_map_{
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nullptr, &android_closeEventTagMap};
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bool has_opened_event_tag_map_ = false;
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// For the related --regex, --max-count, --print
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std::unique_ptr<std::regex> regex_;
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size_t max_count_ = 0; // 0 means "infinite"
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size_t print_count_ = 0;
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bool print_it_anyways_ = false;
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// For PrintDividers()
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log_id_t last_printed_id_ = LOG_ID_MAX;
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bool printed_start_[LOG_ID_MAX] = {};
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bool debug_ = false;
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};
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#ifndef F2FS_IOC_SET_PIN_FILE
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#define F2FS_IOCTL_MAGIC 0xf5
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#define F2FS_IOC_SET_PIN_FILE _IOW(F2FS_IOCTL_MAGIC, 13, __u32)
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#endif
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static int openLogFile(const char* pathname, size_t sizeKB) {
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int fd = open(pathname, O_WRONLY | O_APPEND | O_CREAT | O_CLOEXEC, S_IRUSR | S_IWUSR);
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if (fd < 0) {
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return fd;
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}
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// no need to check errors
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__u32 set = 1;
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ioctl(fd, F2FS_IOC_SET_PIN_FILE, &set);
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fallocate(fd, FALLOC_FL_KEEP_SIZE, 0, (sizeKB << 10));
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return fd;
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}
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void Logcat::RotateLogs() {
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// Can't rotate logs if we're not outputting to a file
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if (!output_file_name_) return;
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output_fd_.reset();
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// Compute the maximum number of digits needed to count up to
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// maxRotatedLogs in decimal. eg:
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// maxRotatedLogs == 30
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// -> log10(30) == 1.477
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// -> maxRotationCountDigits == 2
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int max_rotation_count_digits =
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max_rotated_logs_ > 0 ? (int)(floor(log10(max_rotated_logs_) + 1)) : 0;
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for (int i = max_rotated_logs_; i > 0; i--) {
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std::string file1 =
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StringPrintf("%s.%.*d", output_file_name_, max_rotation_count_digits, i);
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std::string file0;
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if (!(i - 1)) {
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file0 = output_file_name_;
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} else {
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file0 = StringPrintf("%s.%.*d", output_file_name_, max_rotation_count_digits, i - 1);
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}
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if (!file0.length() || !file1.length()) {
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perror("while rotating log files");
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break;
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}
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int err = rename(file0.c_str(), file1.c_str());
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if (err < 0 && errno != ENOENT) {
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perror("while rotating log files");
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}
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}
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output_fd_.reset(openLogFile(output_file_name_, log_rotate_size_kb_));
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if (!output_fd_.ok()) {
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error(EXIT_FAILURE, errno, "Couldn't open output file");
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}
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out_byte_count_ = 0;
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}
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void Logcat::ProcessBuffer(struct log_msg* buf) {
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int bytesWritten = 0;
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int err;
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AndroidLogEntry entry;
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char binaryMsgBuf[1024];
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bool is_binary =
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buf->id() == LOG_ID_EVENTS || buf->id() == LOG_ID_STATS || buf->id() == LOG_ID_SECURITY;
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if (is_binary) {
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if (!event_tag_map_ && !has_opened_event_tag_map_) {
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event_tag_map_.reset(android_openEventTagMap(nullptr));
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has_opened_event_tag_map_ = true;
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}
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err = android_log_processBinaryLogBuffer(&buf->entry, &entry, event_tag_map_.get(),
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binaryMsgBuf, sizeof(binaryMsgBuf));
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// printf(">>> pri=%d len=%d msg='%s'\n",
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// entry.priority, entry.messageLen, entry.message);
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} else {
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err = android_log_processLogBuffer(&buf->entry, &entry);
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}
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if (err < 0 && !debug_) return;
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if (android_log_shouldPrintLine(logformat_.get(), std::string(entry.tag, entry.tagLen).c_str(),
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entry.priority)) {
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bool match = !regex_ ||
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std::regex_search(entry.message, entry.message + entry.messageLen, *regex_);
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print_count_ += match;
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if (match || print_it_anyways_) {
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bytesWritten = android_log_printLogLine(logformat_.get(), output_fd_.get(), &entry);
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if (bytesWritten < 0) {
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error(EXIT_FAILURE, 0, "Output error.");
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}
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}
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}
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out_byte_count_ += bytesWritten;
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if (log_rotate_size_kb_ > 0 && (out_byte_count_ / 1024) >= log_rotate_size_kb_) {
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RotateLogs();
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}
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}
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void Logcat::PrintDividers(log_id_t log_id, bool print_dividers) {
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if (log_id == last_printed_id_ || print_binary_) {
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return;
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}
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if (!printed_start_[log_id] || print_dividers) {
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if (dprintf(output_fd_.get(), "--------- %s %s\n",
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printed_start_[log_id] ? "switch to" : "beginning of",
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android_log_id_to_name(log_id)) < 0) {
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error(EXIT_FAILURE, errno, "Output error");
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}
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}
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last_printed_id_ = log_id;
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printed_start_[log_id] = true;
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}
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void Logcat::SetupOutputAndSchedulingPolicy(bool blocking) {
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if (!output_file_name_) return;
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if (blocking) {
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// Lower priority and set to batch scheduling if we are saving
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// the logs into files and taking continuous content.
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if (set_sched_policy(0, SP_BACKGROUND) < 0) {
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fprintf(stderr, "failed to set background scheduling policy\n");
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}
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struct sched_param param = {};
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if (sched_setscheduler((pid_t)0, SCHED_BATCH, ¶m) < 0) {
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fprintf(stderr, "failed to set to batch scheduler\n");
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}
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if (setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_BACKGROUND) < 0) {
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fprintf(stderr, "failed set to priority\n");
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}
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}
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output_fd_.reset(openLogFile(output_file_name_, log_rotate_size_kb_));
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if (!output_fd_.ok()) {
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error(EXIT_FAILURE, errno, "Couldn't open output file");
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}
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struct stat statbuf;
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if (fstat(output_fd_.get(), &statbuf) == -1) {
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error(EXIT_FAILURE, errno, "Couldn't get output file stat");
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}
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if ((size_t)statbuf.st_size > SIZE_MAX || statbuf.st_size < 0) {
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error(EXIT_FAILURE, 0, "Invalid output file stat.");
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}
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out_byte_count_ = statbuf.st_size;
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}
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// clang-format off
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static void show_help() {
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const char* cmd = getprogname();
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fprintf(stderr, "Usage: %s [options] [filterspecs]\n", cmd);
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fprintf(stderr, R"init(
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General options:
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-b, --buffer=<buffer> Request alternate ring buffer(s):
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main system radio events crash default all
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Additionally, 'kernel' for userdebug and eng builds, and
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'security' for Device Owner installations.
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Multiple -b parameters or comma separated list of buffers are
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allowed. Buffers are interleaved.
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Default -b main,system,crash,kernel.
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-L, --last Dump logs from prior to last reboot from pstore.
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-c, --clear Clear (flush) the entire log and exit.
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if -f is specified, clear the specified file and its related rotated
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log files instead.
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if -L is specified, clear pstore log instead.
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-d Dump the log and then exit (don't block).
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--pid=<pid> Only print logs from the given pid.
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--wrap Sleep for 2 hours or when buffer about to wrap whichever
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comes first. Improves efficiency of polling by providing
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an about-to-wrap wakeup.
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Formatting:
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-v, --format=<format> Sets log print format verb and adverbs, where <format> is one of:
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brief help long process raw tag thread threadtime time
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Modifying adverbs can be added:
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color descriptive epoch monotonic printable uid usec UTC year zone
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Multiple -v parameters or comma separated list of format and format
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modifiers are allowed.
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-D, --dividers Print dividers between each log buffer.
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-B, --binary Output the log in binary.
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Outfile files:
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-f, --file=<file> Log to file instead of stdout.
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-r, --rotate-kbytes=<n> Rotate log every <n> kbytes. Requires -f option.
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-n, --rotate-count=<count> Sets max number of rotated logs to <count>, default 4.
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--id=<id> If the signature <id> for logging to file changes, then clear the
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associated files and continue.
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Logd control:
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These options send a control message to the logd daemon on device, print its return message if
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applicable, then exit. They are incompatible with -L, as these attributes do not apply to pstore.
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-g, --buffer-size Get the size of the ring buffers within logd.
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-G, --buffer-size=<size> Set size of a ring buffer in logd. May suffix with K or M.
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This can individually control each buffer's size with -b.
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-S, --statistics Output statistics.
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--pid can be used to provide pid specific stats.
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-p, --prune Print prune white and ~black list. Service is specified as UID,
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UID/PID or /PID. Weighed for quicker pruning if prefix with ~,
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otherwise weighed for longevity if unadorned. All other pruning
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activity is oldest first. Special case ~! represents an automatic
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quicker pruning for the noisiest UID as determined by the current
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statistics.
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-P, --prune='<list> ...' Set prune white and ~black list, using same format as listed above.
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Must be quoted.
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Filtering:
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-s Set default filter to silent. Equivalent to filterspec '*:S'
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-e, --regex=<expr> Only print lines where the log message matches <expr> where <expr> is
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an ECMAScript regular expression.
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-m, --max-count=<count> Quit after printing <count> lines. This is meant to be paired with
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--regex, but will work on its own.
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--print This option is only applicable when --regex is set and only useful if
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--max-count is also provided.
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With --print, logcat will print all messages even if they do not
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match the regex. Logcat will quit after printing the max-count number
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of lines that match the regex.
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-t <count> Print only the most recent <count> lines (implies -d).
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-t '<time>' Print the lines since specified time (implies -d).
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-T <count> Print only the most recent <count> lines (does not imply -d).
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-T '<time>' Print the lines since specified time (not imply -d).
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count is pure numerical, time is 'MM-DD hh:mm:ss.mmm...'
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'YYYY-MM-DD hh:mm:ss.mmm...' or 'sssss.mmm...' format.
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)init");
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fprintf(stderr, "\nfilterspecs are a series of \n"
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" <tag>[:priority]\n\n"
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"where <tag> is a log component tag (or * for all) and priority is:\n"
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" V Verbose (default for <tag>)\n"
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" D Debug (default for '*')\n"
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" I Info\n"
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" W Warn\n"
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" E Error\n"
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" F Fatal\n"
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" S Silent (suppress all output)\n"
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"\n'*' by itself means '*:D' and <tag> by itself means <tag>:V.\n"
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"If no '*' filterspec or -s on command line, all filter defaults to '*:V'.\n"
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"eg: '*:S <tag>' prints only <tag>, '<tag>:S' suppresses all <tag> log messages.\n"
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"\nIf not specified on the command line, filterspec is set from ANDROID_LOG_TAGS.\n"
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"\nIf not specified with -v on command line, format is set from ANDROID_PRINTF_LOG\n"
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"or defaults to \"threadtime\"\n\n");
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}
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static void show_format_help() {
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fprintf(stderr,
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"-v <format>, --format=<format> options:\n"
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" Sets log print format verb and adverbs, where <format> is:\n"
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" brief long process raw tag thread threadtime time\n"
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" and individually flagged modifying adverbs can be added:\n"
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" color descriptive epoch monotonic printable uid usec UTC year zone\n"
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"\nSingle format verbs:\n"
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" brief — Display priority/tag and PID of the process issuing the message.\n"
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" long — Display all metadata fields, separate messages with blank lines.\n"
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" process — Display PID only.\n"
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" raw — Display the raw log message, with no other metadata fields.\n"
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" tag — Display the priority/tag only.\n"
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" thread — Display priority, PID and TID of process issuing the message.\n"
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" threadtime — Display the date, invocation time, priority, tag, and the PID\n"
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" and TID of the thread issuing the message. (the default format).\n"
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" time — Display the date, invocation time, priority/tag, and PID of the\n"
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" process issuing the message.\n"
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"\nAdverb modifiers can be used in combination:\n"
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" color — Display in highlighted color to match priority. i.e. \x1B[38;5;231mVERBOSE\n"
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" \x1B[38;5;75mDEBUG \x1B[38;5;40mINFO \x1B[38;5;166mWARNING \x1B[38;5;196mERROR FATAL\x1B[0m\n"
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" descriptive — events logs only, descriptions from event-log-tags database.\n"
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" epoch — Display time as seconds since Jan 1 1970.\n"
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" monotonic — Display time as cpu seconds since last boot.\n"
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" printable — Ensure that any binary logging content is escaped.\n"
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" uid — If permitted, display the UID or Android ID of logged process.\n"
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" usec — Display time down the microsecond precision.\n"
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" UTC — Display time as UTC.\n"
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" year — Add the year to the displayed time.\n"
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" zone — Add the local timezone to the displayed time.\n"
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" \"<zone>\" — Print using this public named timezone (experimental).\n\n"
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);
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}
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// clang-format on
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int Logcat::SetLogFormat(const char* format_string) {
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AndroidLogPrintFormat format = android_log_formatFromString(format_string);
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// invalid string?
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if (format == FORMAT_OFF) return -1;
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return android_log_setPrintFormat(logformat_.get(), format);
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}
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static std::pair<unsigned long, const char*> format_of_size(unsigned long value) {
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static const char multipliers[][3] = {{""}, {"Ki"}, {"Mi"}, {"Gi"}};
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size_t i;
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for (i = 0;
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(i < sizeof(multipliers) / sizeof(multipliers[0])) && (value >= 1024);
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value /= 1024, ++i)
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;
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return std::make_pair(value, multipliers[i]);
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}
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static char* parseTime(log_time& t, const char* cp) {
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char* ep = t.strptime(cp, "%m-%d %H:%M:%S.%q");
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if (ep) return ep;
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ep = t.strptime(cp, "%Y-%m-%d %H:%M:%S.%q");
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if (ep) return ep;
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return t.strptime(cp, "%s.%q");
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}
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// Find last logged line in <outputFileName>, or <outputFileName>.1
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static log_time lastLogTime(const char* outputFileName) {
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log_time retval(log_time::EPOCH);
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if (!outputFileName) return retval;
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std::string directory;
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const char* file = strrchr(outputFileName, '/');
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if (!file) {
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directory = ".";
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file = outputFileName;
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} else {
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directory = std::string(outputFileName, file - outputFileName);
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++file;
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}
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std::unique_ptr<DIR, int (*)(DIR*)> dir(opendir(directory.c_str()),
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closedir);
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if (!dir.get()) return retval;
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log_time now(android_log_clockid());
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size_t len = strlen(file);
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log_time modulo(0, NS_PER_SEC);
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struct dirent* dp;
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while (!!(dp = readdir(dir.get()))) {
|
|
if ((dp->d_type != DT_REG) || !!strncmp(dp->d_name, file, len) ||
|
|
(dp->d_name[len] && ((dp->d_name[len] != '.') ||
|
|
(strtoll(dp->d_name + 1, nullptr, 10) != 1)))) {
|
|
continue;
|
|
}
|
|
|
|
std::string file_name = directory;
|
|
file_name += "/";
|
|
file_name += dp->d_name;
|
|
std::string file;
|
|
if (!android::base::ReadFileToString(file_name, &file)) continue;
|
|
|
|
bool found = false;
|
|
for (const auto& line : android::base::Split(file, "\n")) {
|
|
log_time t(log_time::EPOCH);
|
|
char* ep = parseTime(t, line.c_str());
|
|
if (!ep || (*ep != ' ')) continue;
|
|
// determine the time precision of the logs (eg: msec or usec)
|
|
for (unsigned long mod = 1UL; mod < modulo.tv_nsec; mod *= 10) {
|
|
if (t.tv_nsec % (mod * 10)) {
|
|
modulo.tv_nsec = mod;
|
|
break;
|
|
}
|
|
}
|
|
// We filter any times later than current as we may not have the
|
|
// year stored with each log entry. Also, since it is possible for
|
|
// entries to be recorded out of order (very rare) we select the
|
|
// maximum we find just in case.
|
|
if ((t < now) && (t > retval)) {
|
|
retval = t;
|
|
found = true;
|
|
}
|
|
}
|
|
// We count on the basename file to be the definitive end, so stop here.
|
|
if (!dp->d_name[len] && found) break;
|
|
}
|
|
if (retval == log_time::EPOCH) return retval;
|
|
// tail_time prints matching or higher, round up by the modulo to prevent
|
|
// a replay of the last entry we have just checked.
|
|
retval += modulo;
|
|
return retval;
|
|
}
|
|
|
|
void ReportErrorName(const std::string& name, bool allow_security,
|
|
std::vector<std::string>* errors) {
|
|
if (allow_security || name != "security") {
|
|
errors->emplace_back(name);
|
|
}
|
|
}
|
|
|
|
int Logcat::Run(int argc, char** argv) {
|
|
bool hasSetLogFormat = false;
|
|
bool clearLog = false;
|
|
bool security_buffer_selected =
|
|
false; // Do not report errors on the security buffer unless it is explicitly named.
|
|
bool getLogSize = false;
|
|
bool getPruneList = false;
|
|
bool printStatistics = false;
|
|
bool printDividers = false;
|
|
unsigned long setLogSize = 0;
|
|
const char* setPruneList = nullptr;
|
|
const char* setId = nullptr;
|
|
int mode = ANDROID_LOG_RDONLY;
|
|
std::string forceFilters;
|
|
size_t tail_lines = 0;
|
|
log_time tail_time(log_time::EPOCH);
|
|
size_t pid = 0;
|
|
bool got_t = false;
|
|
unsigned id_mask = 0;
|
|
|
|
if (argc == 2 && !strcmp(argv[1], "--help")) {
|
|
show_help();
|
|
return EXIT_SUCCESS;
|
|
}
|
|
|
|
// meant to catch comma-delimited values, but cast a wider
|
|
// net for stability dealing with possible mistaken inputs.
|
|
static const char delimiters[] = ",:; \t\n\r\f";
|
|
|
|
optind = 0;
|
|
while (true) {
|
|
int option_index = 0;
|
|
// list of long-argument only strings for later comparison
|
|
static const char pid_str[] = "pid";
|
|
static const char debug_str[] = "debug";
|
|
static const char id_str[] = "id";
|
|
static const char wrap_str[] = "wrap";
|
|
static const char print_str[] = "print";
|
|
// clang-format off
|
|
static const struct option long_options[] = {
|
|
{ "binary", no_argument, nullptr, 'B' },
|
|
{ "buffer", required_argument, nullptr, 'b' },
|
|
{ "buffer-size", optional_argument, nullptr, 'g' },
|
|
{ "clear", no_argument, nullptr, 'c' },
|
|
{ debug_str, no_argument, nullptr, 0 },
|
|
{ "dividers", no_argument, nullptr, 'D' },
|
|
{ "file", required_argument, nullptr, 'f' },
|
|
{ "format", required_argument, nullptr, 'v' },
|
|
// hidden and undocumented reserved alias for --regex
|
|
{ "grep", required_argument, nullptr, 'e' },
|
|
// hidden and undocumented reserved alias for --max-count
|
|
{ "head", required_argument, nullptr, 'm' },
|
|
{ "help", no_argument, nullptr, 'h' },
|
|
{ id_str, required_argument, nullptr, 0 },
|
|
{ "last", no_argument, nullptr, 'L' },
|
|
{ "max-count", required_argument, nullptr, 'm' },
|
|
{ pid_str, required_argument, nullptr, 0 },
|
|
{ print_str, no_argument, nullptr, 0 },
|
|
{ "prune", optional_argument, nullptr, 'p' },
|
|
{ "regex", required_argument, nullptr, 'e' },
|
|
{ "rotate-count", required_argument, nullptr, 'n' },
|
|
{ "rotate-kbytes", required_argument, nullptr, 'r' },
|
|
{ "statistics", no_argument, nullptr, 'S' },
|
|
// hidden and undocumented reserved alias for -t
|
|
{ "tail", required_argument, nullptr, 't' },
|
|
// support, but ignore and do not document, the optional argument
|
|
{ wrap_str, optional_argument, nullptr, 0 },
|
|
{ nullptr, 0, nullptr, 0 }
|
|
};
|
|
// clang-format on
|
|
|
|
int c = getopt_long(argc, argv, ":cdDhLt:T:gG:sQf:r:n:v:b:BSpP:m:e:", long_options,
|
|
&option_index);
|
|
if (c == -1) break;
|
|
|
|
switch (c) {
|
|
case 0:
|
|
// only long options
|
|
if (long_options[option_index].name == pid_str) {
|
|
if (pid != 0) {
|
|
error(EXIT_FAILURE, 0, "Only one --pid argument can be provided.");
|
|
}
|
|
|
|
if (!ParseUint(optarg, &pid) || pid < 1) {
|
|
error(EXIT_FAILURE, 0, "%s %s out of range.",
|
|
long_options[option_index].name, optarg);
|
|
}
|
|
break;
|
|
}
|
|
if (long_options[option_index].name == wrap_str) {
|
|
mode |= ANDROID_LOG_WRAP | ANDROID_LOG_RDONLY |
|
|
ANDROID_LOG_NONBLOCK;
|
|
// ToDo: implement API that supports setting a wrap timeout
|
|
size_t dummy = ANDROID_LOG_WRAP_DEFAULT_TIMEOUT;
|
|
if (optarg && (!ParseUint(optarg, &dummy) || dummy < 1)) {
|
|
error(EXIT_FAILURE, 0, "%s %s out of range.",
|
|
long_options[option_index].name, optarg);
|
|
}
|
|
if (dummy != ANDROID_LOG_WRAP_DEFAULT_TIMEOUT) {
|
|
fprintf(stderr, "WARNING: %s %u seconds, ignoring %zu\n",
|
|
long_options[option_index].name, ANDROID_LOG_WRAP_DEFAULT_TIMEOUT,
|
|
dummy);
|
|
}
|
|
break;
|
|
}
|
|
if (long_options[option_index].name == print_str) {
|
|
print_it_anyways_ = true;
|
|
break;
|
|
}
|
|
if (long_options[option_index].name == debug_str) {
|
|
debug_ = true;
|
|
break;
|
|
}
|
|
if (long_options[option_index].name == id_str) {
|
|
setId = (optarg && optarg[0]) ? optarg : nullptr;
|
|
}
|
|
break;
|
|
|
|
case 's':
|
|
// default to all silent
|
|
android_log_addFilterRule(logformat_.get(), "*:s");
|
|
break;
|
|
|
|
case 'c':
|
|
clearLog = true;
|
|
mode |= ANDROID_LOG_WRONLY;
|
|
break;
|
|
|
|
case 'L':
|
|
mode |= ANDROID_LOG_RDONLY | ANDROID_LOG_PSTORE |
|
|
ANDROID_LOG_NONBLOCK;
|
|
break;
|
|
|
|
case 'd':
|
|
mode |= ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK;
|
|
break;
|
|
|
|
case 't':
|
|
got_t = true;
|
|
mode |= ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK;
|
|
FALLTHROUGH_INTENDED;
|
|
case 'T':
|
|
if (strspn(optarg, "0123456789") != strlen(optarg)) {
|
|
char* cp = parseTime(tail_time, optarg);
|
|
if (!cp) {
|
|
error(EXIT_FAILURE, 0, "-%c '%s' not in time format.", c, optarg);
|
|
}
|
|
if (*cp) {
|
|
char ch = *cp;
|
|
*cp = '\0';
|
|
fprintf(stderr, "WARNING: -%c '%s' '%c%s' time truncated\n", c, optarg, ch,
|
|
cp + 1);
|
|
*cp = ch;
|
|
}
|
|
} else {
|
|
if (!ParseUint(optarg, &tail_lines) || tail_lines < 1) {
|
|
fprintf(stderr, "WARNING: -%c %s invalid, setting to 1\n", c, optarg);
|
|
tail_lines = 1;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 'D':
|
|
printDividers = true;
|
|
break;
|
|
|
|
case 'e':
|
|
regex_.reset(new std::regex(optarg));
|
|
break;
|
|
|
|
case 'm': {
|
|
if (!ParseUint(optarg, &max_count_) || max_count_ < 1) {
|
|
error(EXIT_FAILURE, 0, "-%c '%s' isn't an integer greater than zero.", c,
|
|
optarg);
|
|
}
|
|
} break;
|
|
|
|
case 'g':
|
|
if (!optarg) {
|
|
getLogSize = true;
|
|
break;
|
|
}
|
|
FALLTHROUGH_INTENDED;
|
|
|
|
case 'G': {
|
|
if (!ParseByteCount(optarg, &setLogSize) || setLogSize < 1) {
|
|
error(EXIT_FAILURE, 0, "-G must be specified as <num><multiplier>.");
|
|
}
|
|
} break;
|
|
|
|
case 'p':
|
|
if (!optarg) {
|
|
getPruneList = true;
|
|
break;
|
|
}
|
|
FALLTHROUGH_INTENDED;
|
|
|
|
case 'P':
|
|
setPruneList = optarg;
|
|
break;
|
|
|
|
case 'b':
|
|
for (const auto& buffer : Split(optarg, delimiters)) {
|
|
if (buffer == "default") {
|
|
id_mask |= (1 << LOG_ID_MAIN) | (1 << LOG_ID_SYSTEM) | (1 << LOG_ID_CRASH);
|
|
} else if (buffer == "all") {
|
|
id_mask = -1;
|
|
} else {
|
|
log_id_t log_id = android_name_to_log_id(buffer.c_str());
|
|
if (log_id >= LOG_ID_MAX) {
|
|
error(EXIT_FAILURE, 0, "Unknown buffer '%s' listed for -b.",
|
|
buffer.c_str());
|
|
}
|
|
if (log_id == LOG_ID_SECURITY) {
|
|
security_buffer_selected = true;
|
|
}
|
|
id_mask |= (1 << log_id);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 'B':
|
|
print_binary_ = 1;
|
|
break;
|
|
|
|
case 'f':
|
|
if ((tail_time == log_time::EPOCH) && !tail_lines) {
|
|
tail_time = lastLogTime(optarg);
|
|
}
|
|
// redirect output to a file
|
|
output_file_name_ = optarg;
|
|
break;
|
|
|
|
case 'r':
|
|
if (!ParseUint(optarg, &log_rotate_size_kb_) || log_rotate_size_kb_ < 1) {
|
|
error(EXIT_FAILURE, 0, "Invalid parameter '%s' to -r.", optarg);
|
|
}
|
|
break;
|
|
|
|
case 'n':
|
|
if (!ParseUint(optarg, &max_rotated_logs_) || max_rotated_logs_ < 1) {
|
|
error(EXIT_FAILURE, 0, "Invalid parameter '%s' to -n.", optarg);
|
|
}
|
|
break;
|
|
|
|
case 'v':
|
|
if (!strcmp(optarg, "help") || !strcmp(optarg, "--help")) {
|
|
show_format_help();
|
|
return EXIT_SUCCESS;
|
|
}
|
|
for (const auto& arg : Split(optarg, delimiters)) {
|
|
int err = SetLogFormat(arg.c_str());
|
|
if (err < 0) {
|
|
error(EXIT_FAILURE, 0, "Invalid parameter '%s' to -v.", arg.c_str());
|
|
}
|
|
if (err) hasSetLogFormat = true;
|
|
}
|
|
break;
|
|
|
|
case 'Q':
|
|
#define LOGCAT_FILTER "androidboot.logcat="
|
|
#define CONSOLE_PIPE_OPTION "androidboot.consolepipe="
|
|
#define CONSOLE_OPTION "androidboot.console="
|
|
#define QEMU_PROPERTY "ro.kernel.qemu"
|
|
#define QEMU_CMDLINE "qemu.cmdline"
|
|
// This is a *hidden* option used to start a version of logcat
|
|
// in an emulated device only. It basically looks for
|
|
// androidboot.logcat= on the kernel command line. If
|
|
// something is found, it extracts a log filter and uses it to
|
|
// run the program. The logcat output will go to consolepipe if
|
|
// androiboot.consolepipe (e.g. qemu_pipe) is given, otherwise,
|
|
// it goes to androidboot.console (e.g. tty)
|
|
{
|
|
// if not in emulator, exit quietly
|
|
if (false == android::base::GetBoolProperty(QEMU_PROPERTY, false)) {
|
|
return EXIT_SUCCESS;
|
|
}
|
|
|
|
std::string cmdline = android::base::GetProperty(QEMU_CMDLINE, "");
|
|
if (cmdline.empty()) {
|
|
android::base::ReadFileToString("/proc/cmdline", &cmdline);
|
|
}
|
|
|
|
const char* logcatFilter = strstr(cmdline.c_str(), LOGCAT_FILTER);
|
|
// if nothing found or invalid filters, exit quietly
|
|
if (!logcatFilter) {
|
|
return EXIT_SUCCESS;
|
|
}
|
|
|
|
const char* p = logcatFilter + strlen(LOGCAT_FILTER);
|
|
const char* q = strpbrk(p, " \t\n\r");
|
|
if (!q) q = p + strlen(p);
|
|
forceFilters = std::string(p, q);
|
|
|
|
// redirect our output to the emulator console pipe or console
|
|
const char* consolePipe =
|
|
strstr(cmdline.c_str(), CONSOLE_PIPE_OPTION);
|
|
const char* console =
|
|
strstr(cmdline.c_str(), CONSOLE_OPTION);
|
|
|
|
if (consolePipe) {
|
|
p = consolePipe + strlen(CONSOLE_PIPE_OPTION);
|
|
} else if (console) {
|
|
p = console + strlen(CONSOLE_OPTION);
|
|
} else {
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
q = strpbrk(p, " \t\n\r");
|
|
int len = q ? q - p : strlen(p);
|
|
std::string devname = "/dev/" + std::string(p, len);
|
|
std::string pipePurpose("pipe:logcat");
|
|
if (consolePipe) {
|
|
// example: "qemu_pipe,pipe:logcat"
|
|
// upon opening of /dev/qemu_pipe, the "pipe:logcat"
|
|
// string with trailing '\0' should be written to the fd
|
|
size_t pos = devname.find(',');
|
|
if (pos != std::string::npos) {
|
|
pipePurpose = devname.substr(pos + 1);
|
|
devname = devname.substr(0, pos);
|
|
}
|
|
}
|
|
|
|
fprintf(stderr, "logcat using %s\n", devname.c_str());
|
|
|
|
int fd = open(devname.c_str(), O_WRONLY | O_CLOEXEC);
|
|
if (fd < 0) {
|
|
break;
|
|
}
|
|
|
|
if (consolePipe) {
|
|
// need the trailing '\0'
|
|
if (!android::base::WriteFully(fd, pipePurpose.c_str(),
|
|
pipePurpose.size() + 1)) {
|
|
close(fd);
|
|
return EXIT_FAILURE;
|
|
}
|
|
}
|
|
// close output and error channels, replace with console
|
|
dup2(fd, output_fd_.get());
|
|
dup2(fd, STDERR_FILENO);
|
|
close(fd);
|
|
}
|
|
break;
|
|
|
|
case 'S':
|
|
printStatistics = true;
|
|
break;
|
|
|
|
case ':':
|
|
error(EXIT_FAILURE, 0, "Option '%s' needs an argument.", argv[optind - 1]);
|
|
break;
|
|
|
|
case 'h':
|
|
show_help();
|
|
show_format_help();
|
|
return EXIT_SUCCESS;
|
|
|
|
case '?':
|
|
error(EXIT_FAILURE, 0, "Unknown option '%s'.", argv[optind - 1]);
|
|
break;
|
|
|
|
default:
|
|
error(EXIT_FAILURE, 0, "Unknown getopt_long() result '%c'.", c);
|
|
}
|
|
}
|
|
|
|
if (max_count_ && got_t) {
|
|
error(EXIT_FAILURE, 0, "Cannot use -m (--max-count) and -t together.");
|
|
}
|
|
if (print_it_anyways_ && (!regex_ || !max_count_)) {
|
|
// One day it would be nice if --print -v color and --regex <expr>
|
|
// could play with each other and show regex highlighted content.
|
|
fprintf(stderr,
|
|
"WARNING: "
|
|
"--print ignored, to be used in combination with\n"
|
|
" "
|
|
"--regex <expr> and --max-count <N>\n");
|
|
print_it_anyways_ = false;
|
|
}
|
|
|
|
// If no buffers are specified, default to using these buffers.
|
|
if (id_mask == 0) {
|
|
id_mask = (1 << LOG_ID_MAIN) | (1 << LOG_ID_SYSTEM) | (1 << LOG_ID_CRASH) |
|
|
(1 << LOG_ID_KERNEL);
|
|
}
|
|
|
|
if (log_rotate_size_kb_ != 0 && !output_file_name_) {
|
|
error(EXIT_FAILURE, 0, "-r requires -f as well.");
|
|
}
|
|
|
|
if (setId != 0) {
|
|
if (!output_file_name_) {
|
|
error(EXIT_FAILURE, 0, "--id='%s' requires -f as well.", setId);
|
|
}
|
|
|
|
std::string file_name = StringPrintf("%s.id", output_file_name_);
|
|
std::string file;
|
|
bool file_ok = android::base::ReadFileToString(file_name, &file);
|
|
android::base::WriteStringToFile(setId, file_name, S_IRUSR | S_IWUSR,
|
|
getuid(), getgid());
|
|
if (!file_ok || !file.compare(setId)) setId = nullptr;
|
|
}
|
|
|
|
if (!hasSetLogFormat) {
|
|
const char* logFormat = getenv("ANDROID_PRINTF_LOG");
|
|
|
|
if (!!logFormat) {
|
|
for (const auto& arg : Split(logFormat, delimiters)) {
|
|
int err = SetLogFormat(arg.c_str());
|
|
// environment should not cause crash of logcat
|
|
if (err < 0) {
|
|
fprintf(stderr, "invalid format in ANDROID_PRINTF_LOG '%s'\n", arg.c_str());
|
|
}
|
|
if (err > 0) hasSetLogFormat = true;
|
|
}
|
|
}
|
|
if (!hasSetLogFormat) {
|
|
SetLogFormat("threadtime");
|
|
}
|
|
}
|
|
|
|
if (forceFilters.size()) {
|
|
int err = android_log_addFilterString(logformat_.get(), forceFilters.c_str());
|
|
if (err < 0) {
|
|
error(EXIT_FAILURE, 0, "Invalid filter expression in logcat args.");
|
|
}
|
|
} else if (argc == optind) {
|
|
// Add from environment variable
|
|
const char* env_tags_orig = getenv("ANDROID_LOG_TAGS");
|
|
|
|
if (!!env_tags_orig) {
|
|
int err = android_log_addFilterString(logformat_.get(), env_tags_orig);
|
|
|
|
if (err < 0) {
|
|
error(EXIT_FAILURE, 0, "Invalid filter expression in ANDROID_LOG_TAGS.");
|
|
}
|
|
}
|
|
} else {
|
|
// Add from commandline
|
|
for (int i = optind ; i < argc ; i++) {
|
|
int err = android_log_addFilterString(logformat_.get(), argv[i]);
|
|
if (err < 0) {
|
|
error(EXIT_FAILURE, 0, "Invalid filter expression '%s'.", argv[i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (mode & ANDROID_LOG_PSTORE) {
|
|
if (output_file_name_) {
|
|
error(EXIT_FAILURE, 0, "-c is ambiguous with both -f and -L specified.");
|
|
}
|
|
if (setLogSize || getLogSize || printStatistics || getPruneList || setPruneList) {
|
|
error(EXIT_FAILURE, 0, "-L is incompatible with -g/-G, -S, and -p/-P.");
|
|
}
|
|
if (clearLog) {
|
|
unlink("/sys/fs/pstore/pmsg-ramoops-0");
|
|
return EXIT_SUCCESS;
|
|
}
|
|
}
|
|
|
|
if (output_file_name_) {
|
|
if (setLogSize || getLogSize || printStatistics || getPruneList || setPruneList) {
|
|
error(EXIT_FAILURE, 0, "-f is incompatible with -g/-G, -S, and -p/-P.");
|
|
}
|
|
|
|
if (clearLog || setId) {
|
|
int max_rotation_count_digits =
|
|
max_rotated_logs_ > 0 ? (int)(floor(log10(max_rotated_logs_) + 1)) : 0;
|
|
|
|
for (int i = max_rotated_logs_; i >= 0; --i) {
|
|
std::string file;
|
|
|
|
if (!i) {
|
|
file = output_file_name_;
|
|
} else {
|
|
file = StringPrintf("%s.%.*d", output_file_name_, max_rotation_count_digits, i);
|
|
}
|
|
|
|
int err = unlink(file.c_str());
|
|
|
|
if (err < 0 && errno != ENOENT) {
|
|
fprintf(stderr, "failed to delete log file '%s': %s\n", file.c_str(),
|
|
strerror(errno));
|
|
}
|
|
}
|
|
}
|
|
|
|
if (clearLog) {
|
|
return EXIT_SUCCESS;
|
|
}
|
|
}
|
|
|
|
std::unique_ptr<logger_list, decltype(&android_logger_list_free)> logger_list{
|
|
nullptr, &android_logger_list_free};
|
|
if (tail_time != log_time::EPOCH) {
|
|
logger_list.reset(android_logger_list_alloc_time(mode, tail_time, pid));
|
|
} else {
|
|
logger_list.reset(android_logger_list_alloc(mode, tail_lines, pid));
|
|
}
|
|
// We have three orthogonal actions below to clear, set log size and
|
|
// get log size. All sharing the same iteration loop.
|
|
std::vector<std::string> open_device_failures;
|
|
std::vector<std::string> clear_failures;
|
|
std::vector<std::string> set_size_failures;
|
|
std::vector<std::string> get_size_failures;
|
|
|
|
for (int i = LOG_ID_MIN; i < LOG_ID_MAX; ++i) {
|
|
if (!(id_mask & (1 << i))) continue;
|
|
const char* buffer_name = android_log_id_to_name(static_cast<log_id_t>(i));
|
|
|
|
auto logger = android_logger_open(logger_list.get(), static_cast<log_id_t>(i));
|
|
if (logger == nullptr) {
|
|
ReportErrorName(buffer_name, security_buffer_selected, &open_device_failures);
|
|
continue;
|
|
}
|
|
|
|
if (clearLog) {
|
|
if (android_logger_clear(logger)) {
|
|
ReportErrorName(buffer_name, security_buffer_selected, &clear_failures);
|
|
}
|
|
}
|
|
|
|
if (setLogSize) {
|
|
if (android_logger_set_log_size(logger, setLogSize)) {
|
|
ReportErrorName(buffer_name, security_buffer_selected, &set_size_failures);
|
|
}
|
|
}
|
|
|
|
if (getLogSize) {
|
|
long size = android_logger_get_log_size(logger);
|
|
long readable = android_logger_get_log_readable_size(logger);
|
|
|
|
if (size < 0 || readable < 0) {
|
|
ReportErrorName(buffer_name, security_buffer_selected, &get_size_failures);
|
|
} else {
|
|
auto size_format = format_of_size(size);
|
|
auto readable_format = format_of_size(readable);
|
|
std::string str = android::base::StringPrintf(
|
|
"%s: ring buffer is %lu %sB (%lu %sB consumed),"
|
|
" max entry is %d B, max payload is %d B\n",
|
|
buffer_name, size_format.first, size_format.second, readable_format.first,
|
|
readable_format.second, (int)LOGGER_ENTRY_MAX_LEN,
|
|
(int)LOGGER_ENTRY_MAX_PAYLOAD);
|
|
TEMP_FAILURE_RETRY(write(output_fd_.get(), str.data(), str.length()));
|
|
}
|
|
}
|
|
}
|
|
|
|
// report any errors in the above loop and exit
|
|
if (!open_device_failures.empty()) {
|
|
error(EXIT_FAILURE, 0, "Unable to open log device%s '%s'.",
|
|
open_device_failures.size() > 1 ? "s" : "", Join(open_device_failures, ",").c_str());
|
|
}
|
|
if (!clear_failures.empty()) {
|
|
error(EXIT_FAILURE, 0, "failed to clear the '%s' log%s.", Join(clear_failures, ",").c_str(),
|
|
clear_failures.size() > 1 ? "s" : "");
|
|
}
|
|
if (!set_size_failures.empty()) {
|
|
error(EXIT_FAILURE, 0, "failed to set the '%s' log size%s.",
|
|
Join(set_size_failures, ",").c_str(), set_size_failures.size() > 1 ? "s" : "");
|
|
}
|
|
if (!get_size_failures.empty()) {
|
|
error(EXIT_FAILURE, 0, "failed to get the readable '%s' log size%s.",
|
|
Join(get_size_failures, ",").c_str(), get_size_failures.size() > 1 ? "s" : "");
|
|
}
|
|
|
|
if (setPruneList) {
|
|
size_t len = strlen(setPruneList);
|
|
if (android_logger_set_prune_list(logger_list.get(), setPruneList, len)) {
|
|
error(EXIT_FAILURE, 0, "Failed to set the prune list.");
|
|
}
|
|
return EXIT_SUCCESS;
|
|
}
|
|
|
|
if (printStatistics || getPruneList) {
|
|
std::string buf(8192, '\0');
|
|
size_t ret_length = 0;
|
|
int retry = 32;
|
|
|
|
for (; retry >= 0; --retry) {
|
|
if (getPruneList) {
|
|
android_logger_get_prune_list(logger_list.get(), buf.data(), buf.size());
|
|
} else {
|
|
android_logger_get_statistics(logger_list.get(), buf.data(), buf.size());
|
|
}
|
|
|
|
ret_length = atol(buf.c_str());
|
|
if (ret_length < 3) {
|
|
error(EXIT_FAILURE, 0, "Failed to read data.");
|
|
}
|
|
|
|
if (ret_length < buf.size()) {
|
|
break;
|
|
}
|
|
|
|
buf.resize(ret_length + 1);
|
|
}
|
|
|
|
if (retry < 0) {
|
|
error(EXIT_FAILURE, 0, "Failed to read data.");
|
|
}
|
|
|
|
buf.resize(ret_length);
|
|
if (buf.back() == '\f') {
|
|
buf.pop_back();
|
|
}
|
|
|
|
// Remove the byte count prefix
|
|
const char* cp = buf.c_str();
|
|
while (isdigit(*cp)) ++cp;
|
|
if (*cp == '\n') ++cp;
|
|
|
|
size_t len = strlen(cp);
|
|
TEMP_FAILURE_RETRY(write(output_fd_.get(), cp, len));
|
|
return EXIT_SUCCESS;
|
|
}
|
|
|
|
if (getLogSize || setLogSize || clearLog) return EXIT_SUCCESS;
|
|
|
|
SetupOutputAndSchedulingPolicy(!(mode & ANDROID_LOG_NONBLOCK));
|
|
|
|
while (!max_count_ || print_count_ < max_count_) {
|
|
struct log_msg log_msg;
|
|
int ret = android_logger_list_read(logger_list.get(), &log_msg);
|
|
if (!ret) {
|
|
error(EXIT_FAILURE, 0, R"init(Unexpected EOF!
|
|
|
|
This means that either logd crashed, or more likely, this instance of logcat was unable to read log
|
|
messages as quickly as they were being produced.
|
|
|
|
If you have enabled significant logging, look into using the -G option to increase log buffer sizes.)init");
|
|
}
|
|
|
|
if (ret < 0) {
|
|
if (ret == -EAGAIN) break;
|
|
|
|
if (ret == -EIO) {
|
|
error(EXIT_FAILURE, 0, "Unexpected EOF!");
|
|
}
|
|
if (ret == -EINVAL) {
|
|
error(EXIT_FAILURE, 0, "Unexpected length.");
|
|
}
|
|
error(EXIT_FAILURE, errno, "Logcat read failure");
|
|
}
|
|
|
|
if (log_msg.id() > LOG_ID_MAX) {
|
|
error(EXIT_FAILURE, 0, "Unexpected log id (%d) over LOG_ID_MAX (%d).", log_msg.id(),
|
|
LOG_ID_MAX);
|
|
}
|
|
|
|
PrintDividers(log_msg.id(), printDividers);
|
|
|
|
if (print_binary_) {
|
|
TEMP_FAILURE_RETRY(write(output_fd_.get(), &log_msg, log_msg.len()));
|
|
} else {
|
|
ProcessBuffer(&log_msg);
|
|
}
|
|
}
|
|
return EXIT_SUCCESS;
|
|
}
|
|
|
|
int main(int argc, char** argv) {
|
|
Logcat logcat;
|
|
return logcat.Run(argc, argv);
|
|
}
|