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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /browser/components/migration/ESEDBReader.jsm
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'browser/components/migration/ESEDBReader.jsm')
-rw-r--r--browser/components/migration/ESEDBReader.jsm590
1 files changed, 590 insertions, 0 deletions
diff --git a/browser/components/migration/ESEDBReader.jsm b/browser/components/migration/ESEDBReader.jsm
new file mode 100644
index 000000000..0768c65aa
--- /dev/null
+++ b/browser/components/migration/ESEDBReader.jsm
@@ -0,0 +1,590 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+this.EXPORTED_SYMBOLS = ["ESEDBReader"]; /* exported ESEDBReader */
+
+const { classes: Cc, interfaces: Ci, utils: Cu, results: Cr } = Components;
+
+Cu.import("resource://gre/modules/ctypes.jsm");
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+Cu.import("resource://gre/modules/Services.jsm");
+XPCOMUtils.defineLazyGetter(this, "log", () => {
+ let ConsoleAPI = Cu.import("resource://gre/modules/Console.jsm", {}).ConsoleAPI;
+ let consoleOptions = {
+ maxLogLevelPref: "browser.esedbreader.loglevel",
+ prefix: "ESEDBReader",
+ };
+ return new ConsoleAPI(consoleOptions);
+});
+
+// We have a globally unique identifier for ESE instances. A new one
+// is used for each different database opened.
+let gESEInstanceCounter = 0;
+
+// We limit the length of strings that we read from databases.
+const MAX_STR_LENGTH = 64 * 1024;
+
+// Kernel-related types:
+const KERNEL = {};
+KERNEL.FILETIME = new ctypes.StructType("FILETIME", [
+ {dwLowDateTime: ctypes.uint32_t},
+ {dwHighDateTime: ctypes.uint32_t}
+]);
+KERNEL.SYSTEMTIME = new ctypes.StructType("SYSTEMTIME", [
+ {wYear: ctypes.uint16_t},
+ {wMonth: ctypes.uint16_t},
+ {wDayOfWeek: ctypes.uint16_t},
+ {wDay: ctypes.uint16_t},
+ {wHour: ctypes.uint16_t},
+ {wMinute: ctypes.uint16_t},
+ {wSecond: ctypes.uint16_t},
+ {wMilliseconds: ctypes.uint16_t}
+]);
+
+// DB column types, cribbed from the ESE header
+var COLUMN_TYPES = {
+ JET_coltypBit: 1, /* True, False, or NULL */
+ JET_coltypUnsignedByte: 2, /* 1-byte integer, unsigned */
+ JET_coltypShort: 3, /* 2-byte integer, signed */
+ JET_coltypLong: 4, /* 4-byte integer, signed */
+ JET_coltypCurrency: 5, /* 8 byte integer, signed */
+ JET_coltypIEEESingle: 6, /* 4-byte IEEE single precision */
+ JET_coltypIEEEDouble: 7, /* 8-byte IEEE double precision */
+ JET_coltypDateTime: 8, /* Integral date, fractional time */
+ JET_coltypBinary: 9, /* Binary data, < 255 bytes */
+ JET_coltypText: 10, /* ANSI text, case insensitive, < 255 bytes */
+ JET_coltypLongBinary: 11, /* Binary data, long value */
+ JET_coltypLongText: 12, /* ANSI text, long value */
+
+ JET_coltypUnsignedLong: 14, /* 4-byte unsigned integer */
+ JET_coltypLongLong: 15, /* 8-byte signed integer */
+ JET_coltypGUID: 16, /* 16-byte globally unique identifier */
+};
+
+// Not very efficient, but only used for error messages
+function getColTypeName(numericValue) {
+ return Object.keys(COLUMN_TYPES).find(t => COLUMN_TYPES[t] == numericValue) || "unknown";
+}
+
+// All type constants and method wrappers go on this object:
+const ESE = {};
+ESE.JET_ERR = ctypes.long;
+ESE.JET_PCWSTR = ctypes.char16_t.ptr;
+// The ESE header calls this JET_API_PTR, but because it isn't ever used as a
+// pointer and because OS.File code implies that the name you give a type
+// matters, I opted for a different name.
+// Note that this is defined differently on 32 vs. 64-bit in the header.
+ESE.JET_API_ITEM = ctypes.voidptr_t.size == 4 ? ctypes.unsigned_long : ctypes.uint64_t;
+ESE.JET_INSTANCE = ESE.JET_API_ITEM;
+ESE.JET_SESID = ESE.JET_API_ITEM;
+ESE.JET_TABLEID = ESE.JET_API_ITEM;
+ESE.JET_COLUMNID = ctypes.unsigned_long;
+ESE.JET_GRBIT = ctypes.unsigned_long;
+ESE.JET_COLTYP = ctypes.unsigned_long;
+ESE.JET_DBID = ctypes.unsigned_long;
+
+ESE.JET_COLUMNDEF = new ctypes.StructType("JET_COLUMNDEF", [
+ {"cbStruct": ctypes.unsigned_long},
+ {"columnid": ESE.JET_COLUMNID },
+ {"coltyp": ESE.JET_COLTYP },
+ {"wCountry": ctypes.unsigned_short }, // sepcifies the country/region for the column definition
+ {"langid": ctypes.unsigned_short },
+ {"cp": ctypes.unsigned_short },
+ {"wCollate": ctypes.unsigned_short }, /* Must be 0 */
+ {"cbMax": ctypes.unsigned_long },
+ {"grbit": ESE.JET_GRBIT }
+]);
+
+// Track open databases
+let gOpenDBs = new Map();
+
+// Track open libraries
+let gLibs = {};
+this.ESE = ESE; // Required for tests.
+this.KERNEL = KERNEL; // ditto
+this.gLibs = gLibs; // ditto
+
+function convertESEError(errorCode) {
+ switch (errorCode) {
+ case -1213 /* JET_errPageSizeMismatch */:
+ case -1002 /* JET_errInvalidName*/:
+ case -1507 /* JET_errColumnNotFound */:
+ // The DB format has changed and we haven't updated this migration code:
+ return "The database format has changed, error code: " + errorCode;
+ case -1207 /* JET_errDatabaseLocked */:
+ case -1302 /* JET_errTableLocked */:
+ return "The database or table is locked, error code: " + errorCode;
+ case -1809 /* JET_errPermissionDenied*/:
+ case -1907 /* JET_errAccessDenied */:
+ return "Access or permission denied, error code: " + errorCode;
+ case -1044 /* JET_errInvalidFilename */:
+ return "Invalid file name";
+ case -1811 /* JET_errFileNotFound */:
+ return "File not found";
+ case -550 /* JET_errDatabaseDirtyShutdown */:
+ return "Database in dirty shutdown state (without the requisite logs?)";
+ case -514 /* JET_errBadLogVersion */:
+ return "Database log version does not match the version of ESE in use.";
+ default:
+ return "Unknown error: " + errorCode;
+ }
+}
+
+function handleESEError(method, methodName, shouldThrow = true, errorLog = true) {
+ return function () {
+ let rv;
+ try {
+ rv = method.apply(null, arguments);
+ } catch (ex) {
+ log.error("Error calling into ctypes method", methodName, ex);
+ throw ex;
+ }
+ let resultCode = parseInt(rv.toString(10), 10);
+ if (resultCode < 0) {
+ if (errorLog) {
+ log.error("Got error " + resultCode + " calling " + methodName);
+ }
+ if (shouldThrow) {
+ throw new Error(convertESEError(rv));
+ }
+ } else if (resultCode > 0 && errorLog) {
+ log.warn("Got warning " + resultCode + " calling " + methodName);
+ }
+ return resultCode;
+ };
+}
+
+
+function declareESEFunction(methodName, ...args) {
+ let declaration = ["Jet" + methodName, ctypes.winapi_abi, ESE.JET_ERR].concat(args);
+ let ctypeMethod = gLibs.ese.declare.apply(gLibs.ese, declaration);
+ ESE[methodName] = handleESEError(ctypeMethod, methodName);
+ ESE["FailSafe" + methodName] = handleESEError(ctypeMethod, methodName, false);
+ ESE["Manual" + methodName] = handleESEError(ctypeMethod, methodName, false, false);
+}
+
+function declareESEFunctions() {
+ declareESEFunction("GetDatabaseFileInfoW", ESE.JET_PCWSTR, ctypes.voidptr_t,
+ ctypes.unsigned_long, ctypes.unsigned_long);
+
+ declareESEFunction("GetSystemParameterW", ESE.JET_INSTANCE, ESE.JET_SESID,
+ ctypes.unsigned_long, ESE.JET_API_ITEM.ptr,
+ ESE.JET_PCWSTR, ctypes.unsigned_long);
+ declareESEFunction("SetSystemParameterW", ESE.JET_INSTANCE.ptr,
+ ESE.JET_SESID, ctypes.unsigned_long, ESE.JET_API_ITEM,
+ ESE.JET_PCWSTR);
+ declareESEFunction("CreateInstanceW", ESE.JET_INSTANCE.ptr, ESE.JET_PCWSTR);
+ declareESEFunction("Init", ESE.JET_INSTANCE.ptr);
+
+ declareESEFunction("BeginSessionW", ESE.JET_INSTANCE, ESE.JET_SESID.ptr,
+ ESE.JET_PCWSTR, ESE.JET_PCWSTR);
+ declareESEFunction("AttachDatabaseW", ESE.JET_SESID, ESE.JET_PCWSTR,
+ ESE.JET_GRBIT);
+ declareESEFunction("DetachDatabaseW", ESE.JET_SESID, ESE.JET_PCWSTR);
+ declareESEFunction("OpenDatabaseW", ESE.JET_SESID, ESE.JET_PCWSTR,
+ ESE.JET_PCWSTR, ESE.JET_DBID.ptr, ESE.JET_GRBIT);
+ declareESEFunction("OpenTableW", ESE.JET_SESID, ESE.JET_DBID, ESE.JET_PCWSTR,
+ ctypes.voidptr_t, ctypes.unsigned_long, ESE.JET_GRBIT,
+ ESE.JET_TABLEID.ptr);
+
+ declareESEFunction("GetColumnInfoW", ESE.JET_SESID, ESE.JET_DBID,
+ ESE.JET_PCWSTR, ESE.JET_PCWSTR, ctypes.voidptr_t,
+ ctypes.unsigned_long, ctypes.unsigned_long);
+
+ declareESEFunction("Move", ESE.JET_SESID, ESE.JET_TABLEID, ctypes.long,
+ ESE.JET_GRBIT);
+
+ declareESEFunction("RetrieveColumn", ESE.JET_SESID, ESE.JET_TABLEID,
+ ESE.JET_COLUMNID, ctypes.voidptr_t, ctypes.unsigned_long,
+ ctypes.unsigned_long.ptr, ESE.JET_GRBIT, ctypes.voidptr_t);
+
+ declareESEFunction("CloseTable", ESE.JET_SESID, ESE.JET_TABLEID);
+ declareESEFunction("CloseDatabase", ESE.JET_SESID, ESE.JET_DBID,
+ ESE.JET_GRBIT);
+
+ declareESEFunction("EndSession", ESE.JET_SESID, ESE.JET_GRBIT);
+
+ declareESEFunction("Term", ESE.JET_INSTANCE);
+}
+
+function unloadLibraries() {
+ log.debug("Unloading");
+ if (gOpenDBs.size) {
+ log.error("Shouldn't unload libraries before DBs are closed!");
+ for (let db of gOpenDBs.values()) {
+ db._close();
+ }
+ }
+ for (let k of Object.keys(ESE)) {
+ delete ESE[k];
+ }
+ gLibs.ese.close();
+ gLibs.kernel.close();
+ delete gLibs.ese;
+ delete gLibs.kernel;
+}
+
+function loadLibraries() {
+ Services.obs.addObserver(unloadLibraries, "xpcom-shutdown", false);
+ gLibs.ese = ctypes.open("esent.dll");
+ gLibs.kernel = ctypes.open("kernel32.dll");
+ KERNEL.FileTimeToSystemTime = gLibs.kernel.declare("FileTimeToSystemTime",
+ ctypes.default_abi, ctypes.int, KERNEL.FILETIME.ptr, KERNEL.SYSTEMTIME.ptr);
+
+ declareESEFunctions();
+}
+
+function ESEDB(rootPath, dbPath, logPath) {
+ log.info("Created db");
+ this.rootPath = rootPath;
+ this.dbPath = dbPath;
+ this.logPath = logPath;
+ this._references = 0;
+ this._init();
+}
+
+ESEDB.prototype = {
+ rootPath: null,
+ dbPath: null,
+ logPath: null,
+ _opened: false,
+ _attached: false,
+ _sessionCreated: false,
+ _instanceCreated: false,
+ _dbId: null,
+ _sessionId: null,
+ _instanceId: null,
+
+ _init() {
+ if (!gLibs.ese) {
+ loadLibraries();
+ }
+ this.incrementReferenceCounter();
+ this._internalOpen();
+ },
+
+ _internalOpen() {
+ try {
+ let dbinfo = new ctypes.unsigned_long();
+ ESE.GetDatabaseFileInfoW(this.dbPath, dbinfo.address(),
+ ctypes.unsigned_long.size, 17);
+
+ let pageSize = ctypes.UInt64.lo(dbinfo.value);
+ ESE.SetSystemParameterW(null, 0, 64 /* JET_paramDatabasePageSize*/,
+ pageSize, null);
+
+ this._instanceId = new ESE.JET_INSTANCE();
+ ESE.CreateInstanceW(this._instanceId.address(),
+ "firefox-dbreader-" + (gESEInstanceCounter++));
+ this._instanceCreated = true;
+
+ ESE.SetSystemParameterW(this._instanceId.address(), 0,
+ 0 /* JET_paramSystemPath*/, 0, this.rootPath);
+ ESE.SetSystemParameterW(this._instanceId.address(), 0,
+ 1 /* JET_paramTempPath */, 0, this.rootPath);
+ ESE.SetSystemParameterW(this._instanceId.address(), 0,
+ 2 /* JET_paramLogFilePath*/, 0, this.logPath);
+
+ // Shouldn't try to call JetTerm if the following call fails.
+ this._instanceCreated = false;
+ ESE.Init(this._instanceId.address());
+ this._instanceCreated = true;
+ this._sessionId = new ESE.JET_SESID();
+ ESE.BeginSessionW(this._instanceId, this._sessionId.address(), null,
+ null);
+ this._sessionCreated = true;
+
+ const JET_bitDbReadOnly = 1;
+ ESE.AttachDatabaseW(this._sessionId, this.dbPath, JET_bitDbReadOnly);
+ this._attached = true;
+ this._dbId = new ESE.JET_DBID();
+ ESE.OpenDatabaseW(this._sessionId, this.dbPath, null,
+ this._dbId.address(), JET_bitDbReadOnly);
+ this._opened = true;
+ } catch (ex) {
+ try {
+ this._close();
+ } catch (innerException) {
+ Cu.reportError(innerException);
+ }
+ // Make sure caller knows we failed.
+ throw ex;
+ }
+ gOpenDBs.set(this.dbPath, this);
+ },
+
+ checkForColumn(tableName, columnName) {
+ if (!this._opened) {
+ throw new Error("The database was closed!");
+ }
+
+ let columnInfo;
+ try {
+ columnInfo = this._getColumnInfo(tableName, [{name: columnName}]);
+ } catch (ex) {
+ return null;
+ }
+ return columnInfo[0];
+ },
+
+ tableExists(tableName) {
+ if (!this._opened) {
+ throw new Error("The database was closed!");
+ }
+
+ let tableId = new ESE.JET_TABLEID();
+ let rv = ESE.ManualOpenTableW(this._sessionId, this._dbId, tableName, null,
+ 0, 4 /* JET_bitTableReadOnly */,
+ tableId.address());
+ if (rv == -1305 /* JET_errObjectNotFound */) {
+ return false;
+ }
+ if (rv < 0) {
+ log.error("Got error " + rv + " calling OpenTableW");
+ throw new Error(convertESEError(rv));
+ }
+
+ if (rv > 0) {
+ log.error("Got warning " + rv + " calling OpenTableW");
+ }
+ ESE.FailSafeCloseTable(this._sessionId, tableId);
+ return true;
+ },
+
+ tableItems: function*(tableName, columns) {
+ if (!this._opened) {
+ throw new Error("The database was closed!");
+ }
+
+ let tableOpened = false;
+ let tableId;
+ try {
+ tableId = this._openTable(tableName);
+ tableOpened = true;
+
+ let columnInfo = this._getColumnInfo(tableName, columns);
+
+ let rv = ESE.ManualMove(this._sessionId, tableId,
+ -2147483648 /* JET_MoveFirst */, 0);
+ if (rv == -1603 /* JET_errNoCurrentRecord */) {
+ // There are no rows in the table.
+ this._closeTable(tableId);
+ return;
+ }
+ if (rv != 0) {
+ throw new Error(convertESEError(rv));
+ }
+
+ do {
+ let rowContents = {};
+ for (let column of columnInfo) {
+ let [buffer, bufferSize] = this._getBufferForColumn(column);
+ // We handle errors manually so we accurately deal with NULL values.
+ let err = ESE.ManualRetrieveColumn(this._sessionId, tableId,
+ column.id, buffer.address(),
+ bufferSize, null, 0, null);
+ rowContents[column.name] = this._convertResult(column, buffer, err);
+ }
+ yield rowContents;
+ } while (ESE.ManualMove(this._sessionId, tableId, 1 /* JET_MoveNext */, 0) === 0);
+ } catch (ex) {
+ if (tableOpened) {
+ this._closeTable(tableId);
+ }
+ throw ex;
+ }
+ this._closeTable(tableId);
+ },
+
+ _openTable(tableName) {
+ let tableId = new ESE.JET_TABLEID();
+ ESE.OpenTableW(this._sessionId, this._dbId, tableName, null,
+ 0, 4 /* JET_bitTableReadOnly */, tableId.address());
+ return tableId;
+ },
+
+ _getBufferForColumn(column) {
+ let buffer;
+ if (column.type == "string") {
+ let wchar_tArray = ctypes.ArrayType(ctypes.char16_t);
+ // size on the column is in bytes, 2 bytes to a wchar, so:
+ let charCount = column.dbSize >> 1;
+ buffer = new wchar_tArray(charCount);
+ } else if (column.type == "boolean") {
+ buffer = new ctypes.uint8_t();
+ } else if (column.type == "date") {
+ buffer = new KERNEL.FILETIME();
+ } else if (column.type == "guid") {
+ let byteArray = ctypes.ArrayType(ctypes.uint8_t);
+ buffer = new byteArray(column.dbSize);
+ } else {
+ throw new Error("Unknown type " + column.type);
+ }
+ return [buffer, buffer.constructor.size];
+ },
+
+ _convertResult(column, buffer, err) {
+ if (err != 0) {
+ if (err == 1004) {
+ // Deal with null values:
+ buffer = null;
+ } else {
+ Cu.reportError("Unexpected JET error: " + err + ";" + " retrieving value for column " + column.name);
+ throw new Error(convertESEError(err));
+ }
+ }
+ if (column.type == "string") {
+ return buffer ? buffer.readString() : "";
+ }
+ if (column.type == "boolean") {
+ return buffer ? (buffer.value == 255) : false;
+ }
+ if (column.type == "guid") {
+ if (buffer.length != 16) {
+ Cu.reportError("Buffer size for guid field " + column.id + " should have been 16!");
+ return "";
+ }
+ let rv = "{";
+ for (let i = 0; i < 16; i++) {
+ if (i == 4 || i == 6 || i == 8 || i == 10) {
+ rv += "-";
+ }
+ let byteValue = buffer.addressOfElement(i).contents;
+ // Ensure there's a leading 0
+ rv += ("0" + byteValue.toString(16)).substr(-2);
+ }
+ return rv + "}";
+ }
+ if (column.type == "date") {
+ if (!buffer) {
+ return null;
+ }
+ let systemTime = new KERNEL.SYSTEMTIME();
+ let result = KERNEL.FileTimeToSystemTime(buffer.address(), systemTime.address());
+ if (result == 0) {
+ throw new Error(ctypes.winLastError);
+ }
+
+ // System time is in UTC, so we use Date.UTC to get milliseconds from epoch,
+ // then divide by 1000 to get seconds, and round down:
+ return new Date(Date.UTC(systemTime.wYear,
+ systemTime.wMonth - 1,
+ systemTime.wDay,
+ systemTime.wHour,
+ systemTime.wMinute,
+ systemTime.wSecond,
+ systemTime.wMilliseconds));
+ }
+ return undefined;
+ },
+
+ _getColumnInfo(tableName, columns) {
+ let rv = [];
+ for (let column of columns) {
+ let columnInfoFromDB = new ESE.JET_COLUMNDEF();
+ ESE.GetColumnInfoW(this._sessionId, this._dbId, tableName, column.name,
+ columnInfoFromDB.address(), ESE.JET_COLUMNDEF.size, 0 /* JET_ColInfo */);
+ let dbType = parseInt(columnInfoFromDB.coltyp.toString(10), 10);
+ let dbSize = parseInt(columnInfoFromDB.cbMax.toString(10), 10);
+ if (column.type == "string") {
+ if (dbType != COLUMN_TYPES.JET_coltypLongText &&
+ dbType != COLUMN_TYPES.JET_coltypText) {
+ throw new Error("Invalid column type for column " + column.name +
+ "; expected text type, got type " + getColTypeName(dbType));
+ }
+ if (dbSize > MAX_STR_LENGTH) {
+ throw new Error("Column " + column.name + " has more than 64k data in it. This API is not designed to handle data that large.");
+ }
+ } else if (column.type == "boolean") {
+ if (dbType != COLUMN_TYPES.JET_coltypBit) {
+ throw new Error("Invalid column type for column " + column.name +
+ "; expected bit type, got type " + getColTypeName(dbType));
+ }
+ } else if (column.type == "date") {
+ if (dbType != COLUMN_TYPES.JET_coltypLongLong) {
+ throw new Error("Invalid column type for column " + column.name +
+ "; expected long long type, got type " + getColTypeName(dbType));
+ }
+ } else if (column.type == "guid") {
+ if (dbType != COLUMN_TYPES.JET_coltypGUID) {
+ throw new Error("Invalid column type for column " + column.name +
+ "; expected guid type, got type " + getColTypeName(dbType));
+ }
+ } else if (column.type) {
+ throw new Error("Unknown column type " + column.type + " requested for column " +
+ column.name + ", don't know what to do.");
+ }
+
+ rv.push({name: column.name, id: columnInfoFromDB.columnid, type: column.type, dbSize, dbType});
+ }
+ return rv;
+ },
+
+ _closeTable(tableId) {
+ ESE.FailSafeCloseTable(this._sessionId, tableId);
+ },
+
+ _close() {
+ this._internalClose();
+ gOpenDBs.delete(this.dbPath);
+ },
+
+ _internalClose() {
+ if (this._opened) {
+ log.debug("close db");
+ ESE.FailSafeCloseDatabase(this._sessionId, this._dbId, 0);
+ log.debug("finished close db");
+ this._opened = false;
+ }
+ if (this._attached) {
+ log.debug("detach db");
+ ESE.FailSafeDetachDatabaseW(this._sessionId, this.dbPath);
+ this._attached = false;
+ }
+ if (this._sessionCreated) {
+ log.debug("end session");
+ ESE.FailSafeEndSession(this._sessionId, 0);
+ this._sessionCreated = false;
+ }
+ if (this._instanceCreated) {
+ log.debug("term");
+ ESE.FailSafeTerm(this._instanceId);
+ this._instanceCreated = false;
+ }
+ },
+
+ incrementReferenceCounter() {
+ this._references++;
+ },
+
+ decrementReferenceCounter() {
+ this._references--;
+ if (this._references <= 0) {
+ this._close();
+ }
+ },
+};
+
+let ESEDBReader = {
+ openDB(rootDir, dbFile, logDir) {
+ let dbFilePath = dbFile.path;
+ if (gOpenDBs.has(dbFilePath)) {
+ let db = gOpenDBs.get(dbFilePath);
+ db.incrementReferenceCounter();
+ return db;
+ }
+ // ESE is really picky about the trailing slashes according to the docs,
+ // so we do as we're told and ensure those are there:
+ return new ESEDB(rootDir.path + "\\", dbFilePath, logDir.path + "\\");
+ },
+
+ closeDB(db) {
+ db.decrementReferenceCounter();
+ },
+
+ COLUMN_TYPES,
+};
+