fixup! test: clean tmpdir on process exit

Fixes for Linux open files

test/parallel/test-fs-open-flags.js

@@ -94,5 +94,8 @@ if (common.isLinux || common.isOSX) {
   tmpdir.refresh();
   const file = path.join(tmpdir.path, 'a.js');
   fs.copyFileSync(fixtures.path('a.js'), file);
-  fs.open(file, O_DSYNC, common.mustCall(assert.ifError));
+  fs.open(file, O_DSYNC, common.mustCall((err, fd) => {
+    assert.ifError(err);
+    fs.closeSync(fd);
+  }));
 }

test/parallel/test-pipe-unref.js

@@ -1,12 +1,27 @@
 'use strict';
 const common = require('../common');
 const net = require('net');
+const assert = require('assert');
+const { fork } = require('child_process');
 
 // This test should end immediately after `unref` is called
+// The pipe will stay open as Node.js completes, thus run in a child process
+// so that tmpdir can be cleaned up.
 
 const tmpdir = require('../common/tmpdir');
-tmpdir.refresh();
 
-const s = net.Server();
-s.listen(common.PIPE);
-s.unref();
+if (process.argv[2] !== 'child') {
+  // Parent
+  tmpdir.refresh();
+
+  // Run test
+  const child = fork(__filename, ['child'], { stdio: 'inherit' });
+  child.on('exit', common.mustCall(function(code) {
+    assert.strictEqual(code, 0);
+  }));
+} else {
+  // Child
+  const s = net.Server();
+  s.listen(common.PIPE);
+  s.unref();
+}

test/parallel/test-repl-history-perm.js

@@ -38,12 +38,15 @@ const replHistoryPath = path.join(tmpdir.path, '.node_repl_history');
 const checkResults = common.mustCall(function(err, r) {
   assert.ifError(err);
 
-  r.input.end();
   const stat = fs.statSync(replHistoryPath);
   const fileMode = stat.mode & 0o777;
   assert.strictEqual(
     fileMode, 0o600,
     `REPL history file should be mode 0600 but was 0${fileMode.toString(8)}`);
+
+  // Close the REPL
+  r.input.emit('keypress', '', { ctrl: true, name: 'd' });
+  r.input.end();
 });
 
 repl.createInternalRepl(