From a9df4f29a20b3940f93fa8d0db90246b2d46ffa6 Mon Sep 17 00:00:00 2001
From: John Barboza <jbarboza@ca.ibm.com>
Date: Fri, 16 Dec 2016 10:46:20 -0500
Subject: [PATCH] test: check fd 0,1,2 are used, not access mode

Don't do a write on stdout/stderr because that checks for their
writability. But fd=1 could legitimately be opened with read-only
access by the user. What this test needs to only ensure is that
they are used at startup.
This fixes https://github.com/nodejs/node/issues/10234
---
 test/parallel/test-stdio-closed.js | 19 +++----------------
 1 file changed, 3 insertions(+), 16 deletions(-)

diff --git a/test/parallel/test-stdio-closed.js b/test/parallel/test-stdio-closed.js
index a85467f76a6d0f..98e4f980d50dd6 100644
--- a/test/parallel/test-stdio-closed.js
+++ b/test/parallel/test-stdio-closed.js
@@ -2,6 +2,7 @@
 const common = require('../common');
 const assert = require('assert');
 const spawn = require('child_process').spawn;
+const fs = require('fs');
 
 if (common.isWindows) {
   common.skip('platform not supported.');
@@ -9,21 +10,7 @@ if (common.isWindows) {
 }
 
 if (process.argv[2] === 'child') {
-  try {
-    process.stdout.write('stdout', function() {
-      try {
-        process.stderr.write('stderr', function() {
-          process.exit(42);
-        });
-      } catch (e) {
-        process.exit(84);
-      }
-    });
-  } catch (e) {
-    assert.strictEqual(e.code, 'EBADF');
-    assert.strictEqual(e.message, 'EBADF: bad file descriptor, write');
-    process.exit(126);
-  }
+  [0, 1, 2].forEach((i) => assert.doesNotThrow(() => fs.fstatSync(i)));
   return;
 }
 
@@ -32,5 +19,5 @@ const cmd = `"${process.execPath}" "${__filename}" child 1>&- 2>&-`;
 const proc = spawn('/bin/sh', ['-c', cmd], { stdio: 'inherit' });
 
 proc.on('exit', common.mustCall(function(exitCode) {
-  assert.strictEqual(exitCode, common.isAix ? 126 : 42);
+  assert.strictEqual(exitCode, 0);
 }));