568 lines
16 KiB
C++
568 lines
16 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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/* 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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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_isBinary = 0;
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static int g_printBinary = 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(struct logger_entry *buf)
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{
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int bytesWritten;
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int err;
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AndroidLogEntry entry;
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char binaryMsgBuf[1024];
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if (g_isBinary) {
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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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bytesWritten = android_log_filterAndPrintLogLine(
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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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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 readLogLines(int logfd)
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{
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while (1) {
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unsigned char buf[LOGGER_ENTRY_MAX_LEN + 1] __attribute__((aligned(4)));
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struct logger_entry *entry = (struct logger_entry *) buf;
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int ret;
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ret = read(logfd, entry, LOGGER_ENTRY_MAX_LEN);
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if (ret < 0) {
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if (errno == EINTR)
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continue;
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if (errno == EAGAIN)
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break;
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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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/* NOTE: driver guarantees we read exactly one full entry */
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entry->msg[entry->len] = '\0';
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if (g_printBinary) {
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printBinary(entry);
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} else {
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(void) processBuffer(entry);
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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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" -g get the size of the log's ring buffer and exit\n"
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" -b <buffer> request alternate ring buffer\n"
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" ('main' (default), 'radio', 'events')\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 logfd;
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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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char *log_device = strdup("/dev/"LOGGER_LOG_MAIN);
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const char *forceFilters = NULL;
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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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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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for (;;) {
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int ret;
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ret = getopt(argc, argv, "cdgsQf: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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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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mode |= O_NONBLOCK;
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break;
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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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free(log_device);
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log_device =
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(char*) malloc(strlen(LOG_FILE_DIR) + strlen(optarg) + 1);
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strcpy(log_device, LOG_FILE_DIR);
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strcat(log_device, optarg);
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android::g_isBinary = (strcmp(optarg, "events") == 0);
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break;
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case 'B':
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android::g_printBinary = 1;
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break;
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case 'f':
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// redirect output to a file
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android::g_outputFileName = optarg;
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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;
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} else {
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long logRotateSize;
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char *lastDigit;
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if (!isdigit(optarg[0])) {
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fprintf(stderr,"Invalid parameter to -r\n");
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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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case 'n':
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if (!isdigit(optarg[0])) {
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fprintf(stderr,"Invalid parameter to -r\n");
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android::show_help(argv[0]);
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exit(-1);
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}
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android::g_maxRotatedLogs = atoi(optarg);
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break;
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case 'v':
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err = setLogFormat (optarg);
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if (err < 0) {
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fprintf(stderr,"Invalid parameter to -v\n");
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android::show_help(argv[0]);
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exit(-1);
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}
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hasSetLogFormat = 1;
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break;
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case 'Q':
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/* this is a *hidden* option used to start a version of logcat */
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/* in an emulated device only. it basically looks for androidboot.logcat= */
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/* on the kernel command line. If something is found, it extracts a log filter */
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/* and uses it to run the program. If nothing is found, the program should */
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/* quit immediately */
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#define KERNEL_OPTION "androidboot.logcat="
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#define CONSOLE_OPTION "androidboot.console="
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{
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int fd;
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char* logcat;
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char* console;
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int force_exit = 1;
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static char cmdline[1024];
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fd = open("/proc/cmdline", O_RDONLY);
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if (fd >= 0) {
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int n = read(fd, cmdline, sizeof(cmdline)-1 );
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if (n < 0) n = 0;
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cmdline[n] = 0;
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close(fd);
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} else {
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cmdline[0] = 0;
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}
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logcat = strstr( cmdline, KERNEL_OPTION );
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console = strstr( cmdline, CONSOLE_OPTION );
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if (logcat != NULL) {
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char* p = logcat + sizeof(KERNEL_OPTION)-1;;
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char* q = strpbrk( p, " \t\n\r" );;
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if (q != NULL)
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*q = 0;
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forceFilters = p;
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force_exit = 0;
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}
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/* if nothing found or invalid filters, exit quietly */
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if (force_exit)
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exit(0);
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/* redirect our output to the emulator console */
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if (console) {
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char* p = console + sizeof(CONSOLE_OPTION)-1;
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char* q = strpbrk( p, " \t\n\r" );
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char devname[64];
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int len;
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if (q != NULL) {
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len = q - p;
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} else
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len = strlen(p);
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len = snprintf( devname, sizeof(devname), "/dev/%.*s", len, p );
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fprintf(stderr, "logcat using %s (%d)\n", devname, len);
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if (len < (int)sizeof(devname)) {
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fd = open( devname, O_WRONLY );
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if (fd >= 0) {
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dup2(fd, 1);
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dup2(fd, 2);
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close(fd);
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}
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}
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}
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}
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break;
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default:
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fprintf(stderr,"Unrecognized Option\n");
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android::show_help(argv[0]);
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exit(-1);
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break;
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}
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}
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if (android::g_logRotateSizeKBytes != 0
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&& android::g_outputFileName == NULL
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) {
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fprintf(stderr,"-r requires -f as well\n");
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android::show_help(argv[0]);
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exit(-1);
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}
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android::setupOutput();
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if (hasSetLogFormat == 0) {
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const char* logFormat = getenv("ANDROID_PRINTF_LOG");
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if (logFormat != NULL) {
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err = setLogFormat(logFormat);
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if (err < 0) {
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fprintf(stderr, "invalid format in ANDROID_PRINTF_LOG '%s'\n",
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logFormat);
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}
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}
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}
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if (forceFilters) {
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err = android_log_addFilterString(g_logformat, forceFilters);
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if (err < 0) {
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fprintf (stderr, "Invalid filter expression in -logcat option\n");
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exit(0);
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}
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} else if (argc == optind) {
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// Add from environment variable
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char *env_tags_orig = getenv("ANDROID_LOG_TAGS");
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if (env_tags_orig != NULL) {
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err = android_log_addFilterString(g_logformat, env_tags_orig);
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if (err < 0) {
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fprintf(stderr, "Invalid filter expression in"
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" ANDROID_LOG_TAGS\n");
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android::show_help(argv[0]);
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exit(-1);
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}
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}
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} else {
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// Add from commandline
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for (int i = optind ; i < argc ; i++) {
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err = android_log_addFilterString(g_logformat, argv[i]);
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if (err < 0) {
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fprintf (stderr, "Invalid filter expression '%s'\n", argv[i]);
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android::show_help(argv[0]);
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exit(-1);
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}
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}
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}
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logfd = open(log_device, mode);
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if (logfd < 0) {
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fprintf(stderr, "Unable to open log device '%s': %s\n",
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log_device, strerror(errno));
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exit(EXIT_FAILURE);
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}
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if (clearLog) {
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int ret;
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ret = android::clearLog(logfd);
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if (ret) {
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perror("ioctl");
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exit(EXIT_FAILURE);
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}
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return 0;
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}
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if (getLogSize) {
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int size, readable;
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size = android::getLogSize(logfd);
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if (size < 0) {
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perror("ioctl");
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exit(EXIT_FAILURE);
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}
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readable = android::getLogReadableSize(logfd);
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if (readable < 0) {
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perror("ioctl");
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exit(EXIT_FAILURE);
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}
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printf("ring buffer is %dKb (%dKb consumed), "
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"max entry is %db, max payload is %db\n",
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size / 1024, readable / 1024,
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(int) LOGGER_ENTRY_MAX_LEN, (int) LOGGER_ENTRY_MAX_PAYLOAD);
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return 0;
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}
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//LOG_EVENT_INT(10, 12345);
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//LOG_EVENT_LONG(11, 0x1122334455667788LL);
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//LOG_EVENT_STRING(0, "whassup, doc?");
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if (android::g_isBinary)
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android::g_eventTagMap = android_openEventTagMap(EVENT_TAG_MAP_FILE);
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android::readLogLines(logfd);
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return 0;
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}
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