Support starting with closed STDIN

Author: clue

examples/01-periodic.php

@@ -29,4 +29,10 @@
     $stdio->end();
 });
 
+// input already closed on program start, exit immediately
+if (!$stdio->isReadable()) {
+    $loop->cancelTimer($timer);
+    $stdio->end();
+}
+
 $loop->run();

src/Stdin.php

@@ -14,6 +14,12 @@ public function __construct(LoopInterface $loop)
     {
         parent::__construct(STDIN, $loop);
 
+        // support starting program with closed STDIN ("example.php 0<&-")
+        // the stream is a valid resource and is not EOF, but fstat fails
+        if (fstat(STDIN) === false) {
+            return $this->close();
+        }
+
         if ($this->isTty()) {
             $this->oldMode = shell_exec('stty -g');
 

tests/FunctionalExampleTest.php

@@ -30,6 +30,17 @@ public function testPeriodicExampleWithSleepNoInputQuitsOnEnd()
         $this->assertNotContains('you just said:', $output);
     }
 
+    public function testPeriodicExampleWithClosedInputQuitsImmediately()
+    {
+        $output = $this->execExample('php 01-periodic.php <&-');
+
+        if (strpos($output, 'said') !== false) {
+            $this->markTestIncomplete('Your platform exhibits a closed STDIN bug, this may need some further debugging');
+        }
+
+        $this->assertNotContains('you just said:', $output);
+    }
+
     private function execExample($command)
     {
         chdir(__DIR__ . '/../examples/');