suggestion for getSystemErrorMap() implementation

lib/internal/errors.js

@@ -428,6 +428,11 @@ function uvErrmapGet(name) {
   return MapPrototypeGet(uvBinding.errmap, name);
 }
 
+function uvGetFullErrMap() {
+  uvBinding = lazyUv();
+  return uvBinding.getErrorMap();
+}
+
 const captureLargerStackTrace = hideStackFrames(
   function captureLargerStackTrace(err) {
     userStackTraceLimit = Error.stackTraceLimit;
@@ -782,6 +787,7 @@ module.exports = {
   isStackOverflowError,
   connResetException,
   uvErrmapGet,
+  uvGetFullErrMap,
   uvException,
   uvExceptionWithHostPort,
   SystemError,

lib/internal/util.js

@@ -35,6 +35,7 @@ const {
     ERR_UNKNOWN_SIGNAL
   },
   uvErrmapGet,
+  uvGetFullErrMap,
   overrideStackTrace,
 } = require('internal/errors');
 const { signals } = internalBinding('constants').os;
@@ -286,6 +287,10 @@ function getSystemErrorName(err) {
   return entry ? entry[0] : `Unknown system error ${err}`;
 }
 
+function getSystemErrorMap() {
+  return uvGetFullErrMap();
+}
+
 const kCustomPromisifiedSymbol = SymbolFor('nodejs.util.promisify.custom');
 const kCustomPromisifyArgsSymbol = Symbol('customPromisifyArgs');
 
@@ -443,6 +448,7 @@ module.exports = {
   filterDuplicateStrings,
   getConstructorOf,
   getSystemErrorName,
+  getSystemErrorMap,
   isError,
   isInsideNodeModules,
   join,

lib/util.js

@@ -68,6 +68,7 @@ const types = require('internal/util/types');
 const {
   deprecate,
   getSystemErrorName: internalErrorName,
+  getSystemErrorMap: internalErrorMap,
   promisify
 } = require('internal/util');
 
@@ -245,6 +246,9 @@ function getSystemErrorName(err) {
   return internalErrorName(err);
 }
 
+function getSystemErrorMap() {
+  return internalErrorMap();
+}
 // Keep the `exports =` so that various functions can still be monkeypatched
 module.exports = {
   _errnoException: errnoException,
@@ -257,6 +261,7 @@ module.exports = {
   format,
   formatWithOptions,
   getSystemErrorName,
+  getSystemErrorMap,
   inherits,
   inspect,
   isArray: ArrayIsArray,