789 lines
23 KiB
C++
789 lines
23 KiB
C++
// Copyright 2006 The Android Open Source Project
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#include <cutils/logger.h>
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#include <cutils/logd.h>
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#include <cutils/sockets.h>
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#include <cutils/logprint.h>
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#include <cutils/event_tag_map.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <time.h>
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#include <errno.h>
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#include <assert.h>
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#include <ctype.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <arpa/inet.h>
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#define DEFAULT_LOG_ROTATE_SIZE_KBYTES 16
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#define DEFAULT_MAX_ROTATED_LOGS 4
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static AndroidLogFormat * g_logformat;
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static bool g_nonblock = false;
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static int g_tail_lines = 0;
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/* logd prefixes records with a length field */
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#define RECORD_LENGTH_FIELD_SIZE_BYTES sizeof(uint32_t)
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#define LOG_FILE_DIR "/dev/log/"
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struct queued_entry_t {
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union {
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unsigned char buf[LOGGER_ENTRY_MAX_LEN + 1] __attribute__((aligned(4)));
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struct logger_entry entry __attribute__((aligned(4)));
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};
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queued_entry_t* next;
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queued_entry_t() {
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next = NULL;
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}
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};
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static int cmp(queued_entry_t* a, queued_entry_t* b) {
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int n = a->entry.sec - b->entry.sec;
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if (n != 0) {
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return n;
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}
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return a->entry.nsec - b->entry.nsec;
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}
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struct log_device_t {
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char* device;
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bool binary;
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int fd;
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bool printed;
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char label;
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queued_entry_t* queue;
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log_device_t* next;
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log_device_t(char* d, bool b, char l) {
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device = d;
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binary = b;
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label = l;
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queue = NULL;
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next = NULL;
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printed = false;
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}
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void enqueue(queued_entry_t* entry) {
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if (this->queue == NULL) {
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this->queue = entry;
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} else {
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queued_entry_t** e = &this->queue;
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while (*e && cmp(entry, *e) >= 0) {
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e = &((*e)->next);
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}
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entry->next = *e;
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*e = entry;
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}
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}
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};
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namespace android {
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/* Global Variables */
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static const char * g_outputFileName = NULL;
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static int g_logRotateSizeKBytes = 0; // 0 means "no log rotation"
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static int g_maxRotatedLogs = DEFAULT_MAX_ROTATED_LOGS; // 0 means "unbounded"
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static int g_outFD = -1;
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static off_t g_outByteCount = 0;
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static int g_printBinary = 0;
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static int g_devCount = 0;
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static EventTagMap* g_eventTagMap = NULL;
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static int openLogFile (const char *pathname)
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{
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return open(g_outputFileName, O_WRONLY | O_APPEND | O_CREAT, S_IRUSR | S_IWUSR);
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}
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static void rotateLogs()
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{
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int err;
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// Can't rotate logs if we're not outputting to a file
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if (g_outputFileName == NULL) {
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return;
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}
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close(g_outFD);
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for (int i = g_maxRotatedLogs ; i > 0 ; i--) {
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char *file0, *file1;
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asprintf(&file1, "%s.%d", g_outputFileName, i);
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if (i - 1 == 0) {
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asprintf(&file0, "%s", g_outputFileName);
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} else {
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asprintf(&file0, "%s.%d", g_outputFileName, i - 1);
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}
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err = rename (file0, file1);
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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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free(file1);
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free(file0);
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}
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g_outFD = openLogFile (g_outputFileName);
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if (g_outFD < 0) {
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perror ("couldn't open output file");
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exit(-1);
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}
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g_outByteCount = 0;
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}
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void printBinary(struct logger_entry *buf)
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{
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size_t size = sizeof(logger_entry) + buf->len;
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int ret;
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do {
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ret = write(g_outFD, buf, size);
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} while (ret < 0 && errno == EINTR);
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}
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static void processBuffer(log_device_t* dev, struct logger_entry *buf)
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{
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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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if (dev->binary) {
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err = android_log_processBinaryLogBuffer(buf, &entry, g_eventTagMap,
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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);
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}
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if (err < 0) {
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goto error;
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}
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if (android_log_shouldPrintLine(g_logformat, entry.tag, entry.priority)) {
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if (false && g_devCount > 1) {
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binaryMsgBuf[0] = dev->label;
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binaryMsgBuf[1] = ' ';
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bytesWritten = write(g_outFD, binaryMsgBuf, 2);
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if (bytesWritten < 0) {
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perror("output error");
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exit(-1);
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}
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}
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bytesWritten = android_log_printLogLine(g_logformat, g_outFD, &entry);
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if (bytesWritten < 0) {
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perror("output error");
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exit(-1);
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}
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}
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g_outByteCount += bytesWritten;
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if (g_logRotateSizeKBytes > 0
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&& (g_outByteCount / 1024) >= g_logRotateSizeKBytes
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) {
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rotateLogs();
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}
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error:
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//fprintf (stderr, "Error processing record\n");
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return;
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}
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static void chooseFirst(log_device_t* dev, log_device_t** firstdev) {
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for (*firstdev = NULL; dev != NULL; dev = dev->next) {
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if (dev->queue != NULL && (*firstdev == NULL || cmp(dev->queue, (*firstdev)->queue) < 0)) {
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*firstdev = dev;
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}
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}
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}
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static void maybePrintStart(log_device_t* dev) {
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if (!dev->printed) {
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dev->printed = true;
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if (g_devCount > 1 && !g_printBinary) {
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char buf[1024];
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snprintf(buf, sizeof(buf), "--------- beginning of %s\n", dev->device);
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if (write(g_outFD, buf, strlen(buf)) < 0) {
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perror("output error");
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exit(-1);
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}
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}
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}
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}
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static void skipNextEntry(log_device_t* dev) {
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maybePrintStart(dev);
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queued_entry_t* entry = dev->queue;
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dev->queue = entry->next;
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delete entry;
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}
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static void printNextEntry(log_device_t* dev) {
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maybePrintStart(dev);
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if (g_printBinary) {
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printBinary(&dev->queue->entry);
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} else {
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processBuffer(dev, &dev->queue->entry);
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}
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skipNextEntry(dev);
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}
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static void readLogLines(log_device_t* devices)
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{
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log_device_t* dev;
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int max = 0;
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int ret;
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int queued_lines = 0;
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bool sleep = false;
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int result;
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fd_set readset;
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for (dev=devices; dev; dev = dev->next) {
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if (dev->fd > max) {
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max = dev->fd;
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}
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}
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while (1) {
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do {
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timeval timeout = { 0, 5000 /* 5ms */ }; // If we oversleep it's ok, i.e. ignore EINTR.
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FD_ZERO(&readset);
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for (dev=devices; dev; dev = dev->next) {
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FD_SET(dev->fd, &readset);
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}
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result = select(max + 1, &readset, NULL, NULL, sleep ? NULL : &timeout);
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} while (result == -1 && errno == EINTR);
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if (result >= 0) {
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for (dev=devices; dev; dev = dev->next) {
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if (FD_ISSET(dev->fd, &readset)) {
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queued_entry_t* entry = new queued_entry_t();
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/* NOTE: driver guarantees we read exactly one full entry */
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ret = read(dev->fd, entry->buf, LOGGER_ENTRY_MAX_LEN);
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if (ret < 0) {
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if (errno == EINTR) {
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delete entry;
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goto next;
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}
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if (errno == EAGAIN) {
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delete entry;
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break;
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}
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perror("logcat read");
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exit(EXIT_FAILURE);
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}
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else if (!ret) {
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fprintf(stderr, "read: Unexpected EOF!\n");
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exit(EXIT_FAILURE);
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}
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else if (entry->entry.len != ret - sizeof(struct logger_entry)) {
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fprintf(stderr, "read: unexpected length. Expected %d, got %d\n",
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entry->entry.len, ret - sizeof(struct logger_entry));
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exit(EXIT_FAILURE);
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}
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entry->entry.msg[entry->entry.len] = '\0';
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dev->enqueue(entry);
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++queued_lines;
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}
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}
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if (result == 0) {
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// we did our short timeout trick and there's nothing new
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// print everything we have and wait for more data
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sleep = true;
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while (true) {
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chooseFirst(devices, &dev);
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if (dev == NULL) {
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break;
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}
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if (g_tail_lines == 0 || queued_lines <= g_tail_lines) {
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printNextEntry(dev);
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} else {
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skipNextEntry(dev);
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}
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--queued_lines;
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}
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// the caller requested to just dump the log and exit
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if (g_nonblock) {
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return;
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}
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} else {
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// print all that aren't the last in their list
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sleep = false;
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while (g_tail_lines == 0 || queued_lines > g_tail_lines) {
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chooseFirst(devices, &dev);
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if (dev == NULL || dev->queue->next == NULL) {
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break;
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}
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if (g_tail_lines == 0) {
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printNextEntry(dev);
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} else {
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skipNextEntry(dev);
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}
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--queued_lines;
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}
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}
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}
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next:
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;
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}
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}
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static int clearLog(int logfd)
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{
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return ioctl(logfd, LOGGER_FLUSH_LOG);
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}
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/* returns the total size of the log's ring buffer */
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static int getLogSize(int logfd)
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{
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return ioctl(logfd, LOGGER_GET_LOG_BUF_SIZE);
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}
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/* returns the readable size of the log's ring buffer (that is, amount of the log consumed) */
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static int getLogReadableSize(int logfd)
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{
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return ioctl(logfd, LOGGER_GET_LOG_LEN);
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}
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static void setupOutput()
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{
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if (g_outputFileName == NULL) {
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g_outFD = STDOUT_FILENO;
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} else {
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struct stat statbuf;
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g_outFD = openLogFile (g_outputFileName);
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if (g_outFD < 0) {
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perror ("couldn't open output file");
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exit(-1);
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}
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fstat(g_outFD, &statbuf);
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g_outByteCount = statbuf.st_size;
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}
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}
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static void show_help(const char *cmd)
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{
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fprintf(stderr,"Usage: %s [options] [filterspecs]\n", cmd);
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fprintf(stderr, "options include:\n"
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" -s Set default filter to silent.\n"
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" Like specifying filterspec '*:s'\n"
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" -f <filename> Log to file. Default to stdout\n"
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" -r [<kbytes>] Rotate log every kbytes. (16 if unspecified). Requires -f\n"
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" -n <count> Sets max number of rotated logs to <count>, default 4\n"
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" -v <format> Sets the log print format, where <format> is one of:\n\n"
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" brief process tag thread raw time threadtime long\n\n"
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" -c clear (flush) the entire log and exit\n"
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" -d dump the log and then exit (don't block)\n"
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" -t <count> print only the most recent <count> lines (implies -d)\n"
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" -g get the size of the log's ring buffer and exit\n"
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" -b <buffer> Request alternate ring buffer, 'main', 'system', 'radio'\n"
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" or 'events'. Multiple -b parameters are allowed and the\n"
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" results are interleaved. The default is -b main -b system.\n"
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" -B output the log in binary");
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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\n"
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" D Debug\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 (supress all output)\n"
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"\n'*' means '*:d' and <tag> by itself means <tag>:v\n"
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"\nIf not specified on the commandline, filterspec is set from ANDROID_LOG_TAGS.\n"
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"If no filterspec is found, filter defaults to '*:I'\n"
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"\nIf not specified with -v, format is set from ANDROID_PRINTF_LOG\n"
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"or defaults to \"brief\"\n\n");
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}
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} /* namespace android */
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static int setLogFormat(const char * formatString)
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{
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static AndroidLogPrintFormat format;
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format = android_log_formatFromString(formatString);
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if (format == FORMAT_OFF) {
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// FORMAT_OFF means invalid string
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return -1;
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}
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android_log_setPrintFormat(g_logformat, format);
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return 0;
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}
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extern "C" void logprint_run_tests(void);
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int main(int argc, char **argv)
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{
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int err;
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int hasSetLogFormat = 0;
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int clearLog = 0;
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int getLogSize = 0;
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int mode = O_RDONLY;
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const char *forceFilters = NULL;
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log_device_t* devices = NULL;
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log_device_t* dev;
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bool needBinary = false;
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g_logformat = android_log_format_new();
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if (argc == 2 && 0 == strcmp(argv[1], "--test")) {
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logprint_run_tests();
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exit(0);
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}
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|
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if (argc == 2 && 0 == strcmp(argv[1], "--help")) {
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android::show_help(argv[0]);
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exit(0);
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}
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|
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for (;;) {
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int ret;
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ret = getopt(argc, argv, "cdt:gsQf:r::n:v:b:B");
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if (ret < 0) {
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break;
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}
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|
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switch(ret) {
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case 's':
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// default to all silent
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android_log_addFilterRule(g_logformat, "*:s");
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break;
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case 'c':
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clearLog = 1;
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mode = O_WRONLY;
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break;
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case 'd':
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g_nonblock = true;
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break;
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case 't':
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g_nonblock = true;
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g_tail_lines = atoi(optarg);
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break;
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|
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case 'g':
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getLogSize = 1;
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break;
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case 'b': {
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char* buf = (char*) malloc(strlen(LOG_FILE_DIR) + strlen(optarg) + 1);
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strcpy(buf, LOG_FILE_DIR);
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strcat(buf, optarg);
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bool binary = strcmp(optarg, "events") == 0;
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if (binary) {
|
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needBinary = true;
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}
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if (devices) {
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dev = devices;
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while (dev->next) {
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dev = dev->next;
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}
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dev->next = new log_device_t(buf, binary, optarg[0]);
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} else {
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devices = new log_device_t(buf, binary, optarg[0]);
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}
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android::g_devCount++;
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}
|
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break;
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|
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case 'B':
|
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android::g_printBinary = 1;
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break;
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|
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case 'f':
|
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// redirect output to a file
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|
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android::g_outputFileName = optarg;
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|
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break;
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|
|
case 'r':
|
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if (optarg == NULL) {
|
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android::g_logRotateSizeKBytes
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= DEFAULT_LOG_ROTATE_SIZE_KBYTES;
|
|
} else {
|
|
long logRotateSize;
|
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char *lastDigit;
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|
|
|
if (!isdigit(optarg[0])) {
|
|
fprintf(stderr,"Invalid parameter to -r\n");
|
|
android::show_help(argv[0]);
|
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exit(-1);
|
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}
|
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android::g_logRotateSizeKBytes = atoi(optarg);
|
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}
|
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break;
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|
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case 'n':
|
|
if (!isdigit(optarg[0])) {
|
|
fprintf(stderr,"Invalid parameter to -r\n");
|
|
android::show_help(argv[0]);
|
|
exit(-1);
|
|
}
|
|
|
|
android::g_maxRotatedLogs = atoi(optarg);
|
|
break;
|
|
|
|
case 'v':
|
|
err = setLogFormat (optarg);
|
|
if (err < 0) {
|
|
fprintf(stderr,"Invalid parameter to -v\n");
|
|
android::show_help(argv[0]);
|
|
exit(-1);
|
|
}
|
|
|
|
hasSetLogFormat = 1;
|
|
break;
|
|
|
|
case 'Q':
|
|
/* 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. If nothing is found, the program should */
|
|
/* quit immediately */
|
|
#define KERNEL_OPTION "androidboot.logcat="
|
|
#define CONSOLE_OPTION "androidboot.console="
|
|
{
|
|
int fd;
|
|
char* logcat;
|
|
char* console;
|
|
int force_exit = 1;
|
|
static char cmdline[1024];
|
|
|
|
fd = open("/proc/cmdline", O_RDONLY);
|
|
if (fd >= 0) {
|
|
int n = read(fd, cmdline, sizeof(cmdline)-1 );
|
|
if (n < 0) n = 0;
|
|
cmdline[n] = 0;
|
|
close(fd);
|
|
} else {
|
|
cmdline[0] = 0;
|
|
}
|
|
|
|
logcat = strstr( cmdline, KERNEL_OPTION );
|
|
console = strstr( cmdline, CONSOLE_OPTION );
|
|
if (logcat != NULL) {
|
|
char* p = logcat + sizeof(KERNEL_OPTION)-1;;
|
|
char* q = strpbrk( p, " \t\n\r" );;
|
|
|
|
if (q != NULL)
|
|
*q = 0;
|
|
|
|
forceFilters = p;
|
|
force_exit = 0;
|
|
}
|
|
/* if nothing found or invalid filters, exit quietly */
|
|
if (force_exit)
|
|
exit(0);
|
|
|
|
/* redirect our output to the emulator console */
|
|
if (console) {
|
|
char* p = console + sizeof(CONSOLE_OPTION)-1;
|
|
char* q = strpbrk( p, " \t\n\r" );
|
|
char devname[64];
|
|
int len;
|
|
|
|
if (q != NULL) {
|
|
len = q - p;
|
|
} else
|
|
len = strlen(p);
|
|
|
|
len = snprintf( devname, sizeof(devname), "/dev/%.*s", len, p );
|
|
fprintf(stderr, "logcat using %s (%d)\n", devname, len);
|
|
if (len < (int)sizeof(devname)) {
|
|
fd = open( devname, O_WRONLY );
|
|
if (fd >= 0) {
|
|
dup2(fd, 1);
|
|
dup2(fd, 2);
|
|
close(fd);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
fprintf(stderr,"Unrecognized Option\n");
|
|
android::show_help(argv[0]);
|
|
exit(-1);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!devices) {
|
|
devices = new log_device_t(strdup("/dev/"LOGGER_LOG_MAIN), false, 'm');
|
|
android::g_devCount = 1;
|
|
int accessmode =
|
|
(mode & O_RDONLY) ? R_OK : 0
|
|
| (mode & O_WRONLY) ? W_OK : 0;
|
|
// only add this if it's available
|
|
if (0 == access("/dev/"LOGGER_LOG_SYSTEM, accessmode)) {
|
|
devices->next = new log_device_t(strdup("/dev/"LOGGER_LOG_SYSTEM), false, 's');
|
|
android::g_devCount++;
|
|
}
|
|
}
|
|
|
|
if (android::g_logRotateSizeKBytes != 0
|
|
&& android::g_outputFileName == NULL
|
|
) {
|
|
fprintf(stderr,"-r requires -f as well\n");
|
|
android::show_help(argv[0]);
|
|
exit(-1);
|
|
}
|
|
|
|
android::setupOutput();
|
|
|
|
if (hasSetLogFormat == 0) {
|
|
const char* logFormat = getenv("ANDROID_PRINTF_LOG");
|
|
|
|
if (logFormat != NULL) {
|
|
err = setLogFormat(logFormat);
|
|
|
|
if (err < 0) {
|
|
fprintf(stderr, "invalid format in ANDROID_PRINTF_LOG '%s'\n",
|
|
logFormat);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (forceFilters) {
|
|
err = android_log_addFilterString(g_logformat, forceFilters);
|
|
if (err < 0) {
|
|
fprintf (stderr, "Invalid filter expression in -logcat option\n");
|
|
exit(0);
|
|
}
|
|
} else if (argc == optind) {
|
|
// Add from environment variable
|
|
char *env_tags_orig = getenv("ANDROID_LOG_TAGS");
|
|
|
|
if (env_tags_orig != NULL) {
|
|
err = android_log_addFilterString(g_logformat, env_tags_orig);
|
|
|
|
if (err < 0) {
|
|
fprintf(stderr, "Invalid filter expression in"
|
|
" ANDROID_LOG_TAGS\n");
|
|
android::show_help(argv[0]);
|
|
exit(-1);
|
|
}
|
|
}
|
|
} else {
|
|
// Add from commandline
|
|
for (int i = optind ; i < argc ; i++) {
|
|
err = android_log_addFilterString(g_logformat, argv[i]);
|
|
|
|
if (err < 0) {
|
|
fprintf (stderr, "Invalid filter expression '%s'\n", argv[i]);
|
|
android::show_help(argv[0]);
|
|
exit(-1);
|
|
}
|
|
}
|
|
}
|
|
|
|
dev = devices;
|
|
while (dev) {
|
|
dev->fd = open(dev->device, mode);
|
|
if (dev->fd < 0) {
|
|
fprintf(stderr, "Unable to open log device '%s': %s\n",
|
|
dev->device, strerror(errno));
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
if (clearLog) {
|
|
int ret;
|
|
ret = android::clearLog(dev->fd);
|
|
if (ret) {
|
|
perror("ioctl");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
|
|
if (getLogSize) {
|
|
int size, readable;
|
|
|
|
size = android::getLogSize(dev->fd);
|
|
if (size < 0) {
|
|
perror("ioctl");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
readable = android::getLogReadableSize(dev->fd);
|
|
if (readable < 0) {
|
|
perror("ioctl");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
printf("%s: ring buffer is %dKb (%dKb consumed), "
|
|
"max entry is %db, max payload is %db\n", dev->device,
|
|
size / 1024, readable / 1024,
|
|
(int) LOGGER_ENTRY_MAX_LEN, (int) LOGGER_ENTRY_MAX_PAYLOAD);
|
|
}
|
|
|
|
dev = dev->next;
|
|
}
|
|
|
|
if (getLogSize) {
|
|
exit(0);
|
|
}
|
|
if (clearLog) {
|
|
exit(0);
|
|
}
|
|
|
|
//LOG_EVENT_INT(10, 12345);
|
|
//LOG_EVENT_LONG(11, 0x1122334455667788LL);
|
|
//LOG_EVENT_STRING(0, "whassup, doc?");
|
|
|
|
if (needBinary)
|
|
android::g_eventTagMap = android_openEventTagMap(EVENT_TAG_MAP_FILE);
|
|
|
|
android::readLogLines(devices);
|
|
|
|
return 0;
|
|
}
|