From bcf8cf911632776e9e809ae460485716808c808f Mon Sep 17 00:00:00 2001
From: Jordi Boggiano <j.boggiano@seld.be>
Date: Thu, 24 May 2012 19:53:48 +0200
Subject: [PATCH] [Process] Refactor the windows handling so it is always
 executed

When regular pipes are closed, the file handlers fallback on windows
should still be processed until they are empty
---
 src/Symfony/Component/Process/Process.php | 122 +++++++++++-----------
 1 file changed, 62 insertions(+), 60 deletions(-)

diff --git a/src/Symfony/Component/Process/Process.php b/src/Symfony/Component/Process/Process.php
index 23e2e89e41..bea18550ae 100644
--- a/src/Symfony/Component/Process/Process.php
+++ b/src/Symfony/Component/Process/Process.php
@@ -206,6 +206,9 @@ class Process
             $this->fileHandles = array(
                 self::STDOUT => tmpfile(),
             );
+            $this->readBytes = array(
+                self::STDOUT => 0,
+            );
             $descriptors = array(array('pipe', 'r'), $this->fileHandles[self::STDOUT], array('pipe', 'w'));
         } else {
             $descriptors = array(array('pipe', 'r'), array('pipe', 'w'), array('pipe', 'w'));
@@ -236,14 +239,18 @@ class Process
             unset($this->pipes[0]);
 
             return;
-        } else {
-            $writePipes = array($this->pipes[0]);
-            unset($this->pipes[0]);
-            $stdinLen = strlen($this->stdin);
-            $stdinOffset = 0;
         }
 
+        $writePipes = array($this->pipes[0]);
+        unset($this->pipes[0]);
+        $stdinLen = strlen($this->stdin);
+        $stdinOffset = 0;
+
         while ($writePipes) {
+            if (defined('PHP_WINDOWS_VERSION_BUILD')) {
+                $this->processFileHandles($callback);
+            }
+
             $r = $this->pipes;
             $w = $writePipes;
             $e = null;
@@ -252,7 +259,8 @@ class Process
 
             if (false === $n) {
                 break;
-            } elseif ($n === 0) {
+            }
+            if ($n === 0) {
                 proc_terminate($this->process);
 
                 throw new \RuntimeException('The process timed out.');
@@ -269,22 +277,6 @@ class Process
                 }
             }
 
-            if (defined('PHP_WINDOWS_VERSION_BUILD')) {
-                $fh = $this->fileHandles;
-                foreach ($fh as $type => $fileHandle) {
-                    fseek($fileHandle, 0);
-                    $data = fread($fileHandle, 8192);
-                    $this->readBytes[$type] = strlen($data);
-                    if (strlen($data) > 0) {
-                        call_user_func($callback, $type == 1 ? self::OUT : self::ERR, $data);
-                    }
-                    if (false === $data) {
-                        fclose($fileHandle);
-                        unset($this->fileHandles[$type]);
-                    }
-                }
-            }
-
             foreach ($r as $pipe) {
                 $type = array_search($pipe, $this->pipes);
                 $data = fread($pipe, 8192);
@@ -319,53 +311,40 @@ class Process
         $this->processInformation = proc_get_status($this->process);
         $callback = $this->buildCallback($callback);
         while ($this->pipes || (defined('PHP_WINDOWS_VERSION_BUILD') && $this->fileHandles)) {
-            $r = $this->pipes;
-            $w = null;
-            $e = null;
-
-            $n = @stream_select($r, $w, $e, $this->timeout);
-
-            if (false === $n) {
-                break;
-            }
-            if (0 === $n) {
-                proc_terminate($this->process);
-
-                throw new \RuntimeException('The process timed out.');
+            if (defined('PHP_WINDOWS_VERSION_BUILD') && $this->fileHandles) {
+                $this->processFileHandles($callback, !$this->pipes);
             }
 
-            if (defined('PHP_WINDOWS_VERSION_BUILD')) {
-                $fh = $this->fileHandles;
-                foreach ($fh as $type => $fileHandle) {
-                    fseek($fileHandle, $this->readBytes[$type]);
-                    $data = fread($fileHandle, 8192);
-                    if (isset($this->readBytes)) {
-                        $this->readBytes[$type] += strlen($data);
-                    } else {
-                        $this->readBytes[$type] = strlen($data);
-                    }
+            if ($this->pipes) {
+                $r = $this->pipes;
+                $w = null;
+                $e = null;
 
+                $n = @stream_select($r, $w, $e, $this->timeout);
+
+                if (false === $n) {
+                    $this->pipes = array();
+
+                    continue;
+                }
+                if (0 === $n) {
+                    proc_terminate($this->process);
+
+                    throw new \RuntimeException('The process timed out.');
+                }
+
+                foreach ($r as $pipe) {
+                    $type = array_search($pipe, $this->pipes);
+                    $data = fread($pipe, 8192);
                     if (strlen($data) > 0) {
                         call_user_func($callback, $type == 1 ? self::OUT : self::ERR, $data);
                     }
-                    if (false === $data) {
-                        fclose($fileHandle);
-                        unset($this->fileHandles[$type]);
+                    if (false === $data || feof($pipe)) {
+                        fclose($pipe);
+                        unset($this->pipes[$type]);
                     }
                 }
             }
-
-            foreach ($r as $pipe) {
-                $type = array_search($pipe, $this->pipes);
-                $data = fread($pipe, 8192);
-                if (strlen($data) > 0) {
-                    call_user_func($callback, $type == 1 ? self::OUT : self::ERR, $data);
-                }
-                if (false === $data || feof($pipe)) {
-                    fclose($pipe);
-                    unset($this->pipes[$type]);
-                }
-            }
         }
         $this->updateStatus();
         if ($this->processInformation['signaled']) {
@@ -725,4 +704,27 @@ class Process
             $this->addOutput(stream_get_contents($this->pipes[self::STDOUT]));
         }
     }
+
+    /**
+     * Handles the windows file handles fallbacks
+     *
+     * @param mixed $callback A valid PHP callback
+     * @param Boolean $closeEmptyHandles if true, handles that are empty will be assumed closed
+     */
+    private function processFileHandles($callback, $closeEmptyHandles = false)
+    {
+        $fh = $this->fileHandles;
+        foreach ($fh as $type => $fileHandle) {
+            fseek($fileHandle, $this->readBytes[$type]);
+            $data = fread($fileHandle, 8192);
+            if (strlen($data) > 0) {
+                $this->readBytes[$type] += strlen($data);
+                call_user_func($callback, $type == 1 ? self::OUT : self::ERR, $data);
+            }
+            if (false === $data || ($closeEmptyHandles && '' === $data && feof($fileHandle))) {
+                fclose($fileHandle);
+                unset($this->fileHandles[$type]);
+            }
+        }
+    }
 }