tty: convert to internal/errors using SystemError

PR-URL: https://github.com/nodejs/node/pull/16567
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>

lib/internal/errors.js

@@ -18,6 +18,7 @@ const { defineProperty } = Object;
 
 // Lazily loaded
 var util = null;
+var buffer;
 
 function makeNodeError(Base) {
   return class NodeError extends Base {
@@ -59,6 +60,12 @@ function makeNodeError(Base) {
   };
 }
 
+function lazyBuffer() {
+  if (buffer === undefined)
+    buffer = require('buffer').Buffer;
+  return buffer;
+}
+
 // A specialized Error that includes an additional info property with
 // additional information about the error condition. The code key will
 // be extracted from the context object or the ERR_SYSTEM_ERROR default
@@ -108,7 +115,8 @@ class SystemError extends makeNodeError(Error) {
   }
 
   set path(val) {
-    this[kInfo].path = val ? Buffer.from(val.toString()) : undefined;
+    this[kInfo].path = val ?
+      lazyBuffer().from(val.toString()) : undefined;
   }
 
   get dest() {
@@ -117,7 +125,8 @@ class SystemError extends makeNodeError(Error) {
   }
 
   set dest(val) {
-    this[kInfo].dest = val ? Buffer.from(val.toString()) : undefined;
+    this[kInfo].dest = val ?
+      lazyBuffer().from(val.toString()) : undefined;
   }
 }
 

lib/tty.js

@@ -40,11 +40,17 @@ function ReadStream(fd, options) {
   if (fd >> 0 !== fd || fd < 0)
     throw new errors.RangeError('ERR_INVALID_FD', fd);
 
+  const ctx = {};
+  const tty = new TTY(fd, true, ctx);
+  if (ctx.code !== undefined) {
+    throw new errors.SystemError(ctx);
+  }
+
   options = util._extend({
     highWaterMark: 0,
     readable: true,
     writable: false,
-    handle: new TTY(fd, true)
+    handle: tty
   }, options);
 
   net.Socket.call(this, options);
@@ -69,8 +75,14 @@ function WriteStream(fd) {
   if (fd >> 0 !== fd || fd < 0)
     throw new errors.RangeError('ERR_INVALID_FD', fd);
 
+  const ctx = {};
+  const tty = new TTY(fd, false, ctx);
+  if (ctx.code !== undefined) {
+    throw new errors.SystemError(ctx);
+  }
+
   net.Socket.call(this, {
-    handle: new TTY(fd, false),
+    handle: tty,
     readable: false,
     writable: true
   });

src/tty_wrap.cc

@@ -154,9 +154,10 @@ void TTYWrap::New(const FunctionCallbackInfo<Value>& args) {
 
   int err = 0;
   TTYWrap* wrap = new TTYWrap(env, args.This(), fd, args[1]->IsTrue(), &err);
-  if (err != 0)
-    return env->ThrowUVException(err, "uv_tty_init");
-
+  if (err != 0) {
+    env->CollectUVExceptionInfo(args[2], err, "uv_tty_init");
+    args.GetReturnValue().SetUndefined();
+  }
   wrap->UpdateWriteQueueSize();
 }
 

test/parallel/test-ttywrap-invalid-fd.js

@@ -1,44 +1,57 @@
 'use strict';
 const common = require('../common');
-const assert = require('assert');
 const fs = require('fs');
 const tty = require('tty');
 
-assert.throws(() => {
-  new tty.WriteStream(-1);
-}, common.expectsError({
-  code: 'ERR_INVALID_FD',
-  type: RangeError,
-  message: '"fd" must be a positive integer: -1'
-})
+common.expectsError(
+  () => new tty.WriteStream(-1),
+  {
+    code: 'ERR_INVALID_FD',
+    type: RangeError,
+    message: '"fd" must be a positive integer: -1'
+  }
 );
 
-const err_regex = common.isWindows ?
-  /^Error: EBADF: bad file descriptor, uv_tty_init$/ :
-  /^Error: EINVAL: invalid argument, uv_tty_init$/;
-assert.throws(() => {
-  let fd = 2;
-  // Get first known bad file descriptor.
-  try {
-    while (fs.fstatSync(++fd));
-  } catch (e) { }
-  new tty.WriteStream(fd);
-}, err_regex);
+{
+  const message = common.isWindows ?
+    'bad file descriptor: EBADF [uv_tty_init]' :
+    'invalid argument: EINVAL [uv_tty_init]';
 
-assert.throws(() => {
-  new tty.ReadStream(-1);
-}, common.expectsError({
-  code: 'ERR_INVALID_FD',
-  type: RangeError,
-  message: '"fd" must be a positive integer: -1'
-})
+  common.expectsError(
+    () => {
+      let fd = 2;
+      // Get first known bad file descriptor.
+      try {
+        while (fs.fstatSync(++fd));
+      } catch (e) { }
+      new tty.WriteStream(fd);
+    }, {
+      code: 'ERR_SYSTEM_ERROR',
+      type: Error,
+      message
+    }
+  );
+
+  common.expectsError(
+    () => {
+      let fd = 2;
+      // Get first known bad file descriptor.
+      try {
+        while (fs.fstatSync(++fd));
+      } catch (e) { }
+      new tty.ReadStream(fd);
+    }, {
+      code: 'ERR_SYSTEM_ERROR',
+      type: Error,
+      message
+    });
+}
+
+common.expectsError(
+  () => new tty.ReadStream(-1),
+  {
+    code: 'ERR_INVALID_FD',
+    type: RangeError,
+    message: '"fd" must be a positive integer: -1'
+  }
 );
-
-assert.throws(() => {
-  let fd = 2;
-  // Get first known bad file descriptor.
-  try {
-    while (fs.fstatSync(++fd));
-  } catch (e) { }
-  new tty.ReadStream(fd);
-}, err_regex);