TEST(logcat, buckets) {
    FILE *fp;

    ASSERT_EQ(0, NULL == (fp = popen(
      "logcat -b radio -b events -b system -b main -d 2>/dev/null",
      "r")));

    char buffer[5120];

    int ids = 0;
    int count = 0;

    while (fgets(buffer, sizeof(buffer), fp)) {
        if (!strncmp(begin, buffer, sizeof(begin) - 1)) {
            while (char *cp = strrchr(buffer, '\n')) {
                *cp = '\0';
            }
            log_id_t id = android_name_to_log_id(buffer + sizeof(begin) - 1);
            ids |= 1 << id;
            ++count;
        }
    }

    pclose(fp);

    ASSERT_EQ(15, ids);

    ASSERT_EQ(4, count);
}
TEST(liblog, android_logger_get_) {
#ifdef __ANDROID__
  // This test assumes the log buffers are filled with noise from
  // normal operations. It will fail if done immediately after a
  // logcat -c.
  struct logger_list* logger_list =
      android_logger_list_alloc(ANDROID_LOG_WRONLY, 0, 0);

  for (int i = LOG_ID_MIN; i < LOG_ID_MAX; ++i) {
    log_id_t id = static_cast<log_id_t>(i);
    const char* name = android_log_id_to_name(id);
    if (id != android_name_to_log_id(name)) {
      continue;
    }
    fprintf(stderr, "log buffer %s\r", name);
    struct logger* logger;
    EXPECT_TRUE(NULL != (logger = android_logger_open(logger_list, id)));
    EXPECT_EQ(id, android_logger_get_id(logger));
    ssize_t get_log_size = android_logger_get_log_size(logger);
    /* security buffer is allowed to be denied */
    if (strcmp("security", name)) {
      EXPECT_LT(0, get_log_size);
      // crash buffer is allowed to be empty, that is actually healthy!
      // kernel buffer is allowed to be empty on "user" builds
      // stats buffer is allowed to be empty TEMPORARILY.
      // TODO: remove stats buffer from here once we start to use it in
      // framework (b/68266385).
      EXPECT_LE(  // boolean 1 or 0 depending on expected content or empty
          !!((strcmp("crash", name) != 0) &&
             ((strcmp("kernel", name) != 0) ||
              __android_logger_property_get_bool(
                  "ro.logd.kernel", BOOL_DEFAULT_TRUE | BOOL_DEFAULT_FLAG_ENG |
                                        BOOL_DEFAULT_FLAG_SVELTE)) &&
             (strcmp("stats", name) != 0)),
          android_logger_get_log_readable_size(logger));
    } else {
      EXPECT_NE(0, get_log_size);
      if (get_log_size < 0) {
        EXPECT_GT(0, android_logger_get_log_readable_size(logger));
      } else {
        EXPECT_LE(0, android_logger_get_log_readable_size(logger));
      }
    }
    EXPECT_LT(0, android_logger_get_log_version(logger));
  }

  android_logger_list_close(logger_list);
#else
  GTEST_LOG_(INFO) << "This test does nothing.\n";
#endif
}
TEST(liblog, android_logger_get_) {
    struct logger_list * logger_list = android_logger_list_alloc(O_WRONLY, 0, 0);

    for(int i = LOG_ID_MIN; i < LOG_ID_MAX; ++i) {
        log_id_t id = static_cast<log_id_t>(i);
        const char *name = android_log_id_to_name(id);
        if (id != android_name_to_log_id(name)) {
            continue;
        }
        struct logger * logger;
        EXPECT_TRUE(NULL != (logger = android_logger_open(logger_list, id)));
        EXPECT_EQ(id, android_logger_get_id(logger));
        EXPECT_LT(0, android_logger_get_log_size(logger));
        EXPECT_LT(0, android_logger_get_log_readable_size(logger));
        EXPECT_LT(0, android_logger_get_log_version(logger));
    }

    android_logger_list_close(logger_list);
}
TEST(liblog, android_logger_get_) {
    struct logger_list * logger_list = android_logger_list_alloc(ANDROID_LOG_WRONLY, 0, 0);

    for(int i = LOG_ID_MIN; i < LOG_ID_MAX; ++i) {
        log_id_t id = static_cast<log_id_t>(i);
        const char *name = android_log_id_to_name(id);
        if (id != android_name_to_log_id(name)) {
            continue;
        }
        fprintf(stderr, "log buffer %s\r", name);
        struct logger * logger;
        EXPECT_TRUE(NULL != (logger = android_logger_open(logger_list, id)));
        EXPECT_EQ(id, android_logger_get_id(logger));
        /* crash buffer is allowed to be empty, that is actually healthy! */
        if (android_logger_get_log_size(logger) || strcmp("crash", name)) {
            EXPECT_LT(0, android_logger_get_log_size(logger));
        }
        EXPECT_LT(0, android_logger_get_log_readable_size(logger));
        EXPECT_LT(0, android_logger_get_log_version(logger));
    }

    android_logger_list_close(logger_list);
}
int main(int argc, char **argv)
{
    int err;
    int hasSetLogFormat = 0;
    int clearLog = 0;
    int getLogSize = 0;
#ifdef USERDEBUG_BUILD
    unsigned long setLogSize = 0;
    int getPruneList = 0;
    char *setPruneList = NULL;
#endif
    int printStatistics = 0;
    int mode = O_RDONLY;
    const char *forceFilters = NULL;
    log_device_t* devices = NULL;
    log_device_t* dev;
    bool needBinary = false;
    struct logger_list *logger_list;
    unsigned int tail_lines = 0;
    log_time tail_time(log_time::EPOCH);

    signal(SIGPIPE, exit);

    g_logformat = android_log_format_new();

    if (argc == 2 && 0 == strcmp(argv[1], "--test")) {
        logprint_run_tests();
        exit(0);
    }

    if (argc == 2 && 0 == strcmp(argv[1], "--help")) {
        android::show_help(argv[0]);
        exit(0);
    }

    for (;;) {
        int ret;

        ret = getopt(argc, argv,
#ifdef USERDEBUG_BUILD
            "cdt:T:gG:sQf:r::n:v:b:BSpP:"
#else
            "cdt:T:gsQf:r::n:v:b:BS"
#endif
        );

        if (ret < 0) {
            break;
        }

        switch(ret) {
            case 's':
                // default to all silent
                android_log_addFilterRule(g_logformat, "*:s");
            break;

            case 'c':
                clearLog = 1;
                mode = O_WRONLY;
            break;

            case 'd':
                mode = O_RDONLY | O_NDELAY;
            break;

            case 't':
                mode = O_RDONLY | O_NDELAY;
                /* FALLTHRU */
            case 'T':
                if (strspn(optarg, "0123456789") != strlen(optarg)) {
                    char *cp = tail_time.strptime(optarg,
                                                  log_time::default_format);
                    if (!cp) {
                        fprintf(stderr,
                                "ERROR: -%c \"%s\" not in \"%s\" time format\n",
                                ret, optarg, log_time::default_format);
                        exit(1);
                    }
                    if (*cp) {
                        char c = *cp;
                        *cp = '\0';
                        fprintf(stderr,
                                "WARNING: -%c \"%s\"\"%c%s\" time truncated\n",
                                ret, optarg, c, cp + 1);
                        *cp = c;
                    }
                } else {
                    tail_lines = atoi(optarg);
                    if (!tail_lines) {
                        fprintf(stderr,
                                "WARNING: -%c %s invalid, setting to 1\n",
                                ret, optarg);
                        tail_lines = 1;
                    }
                }
            break;

            case 'g':
                getLogSize = 1;
            break;

#ifdef USERDEBUG_BUILD

            case 'G': {
                // would use atol if not for the multiplier
                char *cp = optarg;
                setLogSize = 0;
                while (('0' <= *cp) && (*cp <= '9')) {
                    setLogSize *= 10;
                    setLogSize += *cp - '0';
                    ++cp;
                }

                switch(*cp) {
                case 'g':
                case 'G':
                    setLogSize *= 1024;
                /* FALLTHRU */
                case 'm':
                case 'M':
                    setLogSize *= 1024;
                /* FALLTHRU */
                case 'k':
                case 'K':
                    setLogSize *= 1024;
                /* FALLTHRU */
                case '\0':
                break;

                default:
                    setLogSize = 0;
                }

                if (!setLogSize) {
                    fprintf(stderr, "ERROR: -G <num><multiplier>\n");
                    exit(1);
                }
            }
            break;

            case 'p':
                getPruneList = 1;
            break;

            case 'P':
                setPruneList = optarg;
            break;

#endif

            case 'b': {
                if (strcmp(optarg, "all") == 0) {
                    while (devices) {
                        dev = devices;
                        devices = dev->next;
                        delete dev;
                    }

                    dev = devices = new log_device_t("main", false, 'm');
                    android::g_devCount = 1;
                    if (android_name_to_log_id("system") == LOG_ID_SYSTEM) {
                        dev->next = new log_device_t("system", false, 's');
                        if (dev->next) {
                            dev = dev->next;
                            android::g_devCount++;
                        }
                    }
                    if (android_name_to_log_id("radio") == LOG_ID_RADIO) {
                        dev->next = new log_device_t("radio", false, 'r');
                        if (dev->next) {
                            dev = dev->next;
                            android::g_devCount++;
                        }
                    }
                    if (android_name_to_log_id("events") == LOG_ID_EVENTS) {
                        dev->next = new log_device_t("events", true, 'e');
                        if (dev->next) {
                            android::g_devCount++;
                            needBinary = true;
                        }
                    }
                    break;
                }

                bool binary = strcmp(optarg, "events") == 0;
                if (binary) {
                    needBinary = true;
                }

                if (devices) {
                    dev = devices;
                    while (dev->next) {
                        dev = dev->next;
                    }
                    dev->next = new log_device_t(optarg, binary, optarg[0]);
                } else {
                    devices = new log_device_t(optarg, binary, optarg[0]);
                }
                android::g_devCount++;
            }
            break;

            case 'B':
                android::g_printBinary = 1;
            break;

            case 'f':
                // redirect output to a file

                android::g_outputFileName = optarg;

            break;

            case 'r':
                if (optarg == NULL) {
                    android::g_logRotateSizeKBytes
                                = DEFAULT_LOG_ROTATE_SIZE_KBYTES;
                } else {
                    long logRotateSize;
                    char *lastDigit;

                    if (!isdigit(optarg[0])) {
                        fprintf(stderr,"Invalid parameter to -r\n");
                        android::show_help(argv[0]);
                        exit(-1);
                    }
                    android::g_logRotateSizeKBytes = atoi(optarg);
                }
            break;

            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;

            case 'S':
                printStatistics = 1;
                break;

            default:
                fprintf(stderr,"Unrecognized Option\n");
                android::show_help(argv[0]);
                exit(-1);
            break;
        }
    }

    if (!devices) {
        devices = new log_device_t("main", false, 'm');
        android::g_devCount = 1;
        if (android_name_to_log_id("system") == LOG_ID_SYSTEM) {
            devices->next = new log_device_t("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;
    if (tail_time != log_time::EPOCH) {
        logger_list = android_logger_list_alloc_time(mode, tail_time, 0);
    } else {
        logger_list = android_logger_list_alloc(mode, tail_lines, 0);
    }
    while (dev) {
        dev->logger_list = logger_list;
        dev->logger = android_logger_open(logger_list,
                                          android_name_to_log_id(dev->device));
        if (!dev->logger) {
            fprintf(stderr, "Unable to open log device '%s'\n", dev->device);
            exit(EXIT_FAILURE);
        }

        if (clearLog) {
            int ret;
            ret = android_logger_clear(dev->logger);
            if (ret) {
                perror("failed to clear the log");
                exit(EXIT_FAILURE);
            }
        }

#ifdef USERDEBUG_BUILD

        if (setLogSize && android_logger_set_log_size(dev->logger, setLogSize)) {
            perror("failed to set the log size");
            exit(EXIT_FAILURE);
        }

#endif

        if (getLogSize) {
            long size, readable;

            size = android_logger_get_log_size(dev->logger);
            if (size < 0) {
                perror("failed to get the log size");
                exit(EXIT_FAILURE);
            }

            readable = android_logger_get_log_readable_size(dev->logger);
            if (readable < 0) {
                perror("failed to get the readable log size");
                exit(EXIT_FAILURE);
            }

            printf("%s: ring buffer is %ldKb (%ldKb 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;
    }

#ifdef USERDEBUG_BUILD

    if (setPruneList) {
        size_t len = strlen(setPruneList) + 32; // margin to allow rc
        char *buf = (char *) malloc(len);

        strcpy(buf, setPruneList);
        int ret = android_logger_set_prune_list(logger_list, buf, len);
        free(buf);

        if (ret) {
            perror("failed to set the prune list");
            exit(EXIT_FAILURE);
        }
    }

#endif

    if (
#ifdef USERDEBUG_BUILD
        printStatistics || getPruneList
#else
        printStatistics
#endif
    ) {
        size_t len = 8192;
        char *buf;

        for(int retry = 32;
                (retry >= 0) && ((buf = new char [len]));
                delete [] buf, --retry) {
#ifdef USERDEBUG_BUILD
            if (getPruneList) {
                android_logger_get_prune_list(logger_list, buf, len);
            } else {
                android_logger_get_statistics(logger_list, buf, len);
            }
#else
            android_logger_get_statistics(logger_list, buf, len);
#endif
            buf[len-1] = '\0';
            size_t ret = atol(buf) + 1;
            if (ret < 4) {
                delete [] buf;
                buf = NULL;
                break;
            }
            bool check = ret <= len;
            len = ret;
            if (check) {
                break;
            }
        }

        if (!buf) {
            perror("failed to read data");
            exit(EXIT_FAILURE);
        }

        // remove trailing FF
        char *cp = buf + len - 1;
        *cp = '\0';
        bool truncated = *--cp != '\f';
        if (!truncated) {
            *cp = '\0';
        }

        // squash out the byte count
        cp = buf;
        if (!truncated) {
            while (isdigit(*cp)) {
                ++cp;
            }
            if (*cp == '\n') {
                ++cp;
            }
        }

        printf("%s", cp);
        delete [] buf;
        exit(0);
    }


    if (getLogSize) {
        exit(0);
    }
#ifdef USERDEBUG_BUILD
    if (setLogSize || setPruneList) {
        exit(0);
    }
#endif
    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);

    while (1) {
        struct log_msg log_msg;
        int ret = android_logger_list_read(logger_list, &log_msg);

        if (ret == 0) {
            fprintf(stderr, "read: Unexpected EOF!\n");
            exit(EXIT_FAILURE);
        }

        if (ret < 0) {
            if (ret == -EAGAIN) {
                break;
            }

            if (ret == -EIO) {
                fprintf(stderr, "read: Unexpected EOF!\n");
                exit(EXIT_FAILURE);
            }
            if (ret == -EINVAL) {
                fprintf(stderr, "read: unexpected length.\n");
                exit(EXIT_FAILURE);
            }
            perror("logcat read failure");
            exit(EXIT_FAILURE);
        }

        for(dev = devices; dev; dev = dev->next) {
            if (android_name_to_log_id(dev->device) == log_msg.id()) {
                break;
            }
        }
        if (!dev) {
            fprintf(stderr, "read: Unexpected log ID!\n");
            exit(EXIT_FAILURE);
        }

        android::maybePrintStart(dev);
        if (android::g_printBinary) {
            android::printBinary(&log_msg);
        } else {
            android::processBuffer(dev, &log_msg);
        }
    }

    android_logger_list_free(logger_list);

    return 0;
}