the whole shebang

vendor/symfony/process/Symfony/Component/Process/Tests/ProcessTestHelper.php

@@ -0,0 +1,63 @@
+<?php
+
+define('ERR_SELECT_FAILED', 1);
+define('ERR_TIMEOUT', 2);
+define('ERR_READ_FAILED', 3);
+define('ERR_WRITE_FAILED', 4);
+
+$read = array(STDIN);
+$write = array(STDOUT, STDERR);
+
+stream_set_blocking(STDIN, false);
+stream_set_blocking(STDOUT, false);
+stream_set_blocking(STDERR, false);
+
+$out = $err = '';
+while ($read || $write) {
+    $r = $read;
+    $w = $write;
+    $e = null;
+    $n = stream_select($r, $w, $e, 5);
+
+    if (false === $n) {
+        die(ERR_SELECT_FAILED);
+    } elseif ($n < 1) {
+        die(ERR_TIMEOUT);
+    }
+
+    if (in_array(STDOUT, $w) && strlen($out) > 0) {
+         $written = fwrite(STDOUT, (binary) $out, 1024);
+         if (false === $written) {
+             die(ERR_WRITE_FAILED);
+         }
+         $out = (binary) substr($out, $written);
+    }
+    if (null === $read && strlen($out) < 1) {
+        $write = array_diff($write, array(STDOUT));
+    }
+
+    if (in_array(STDERR, $w) && strlen($err) > 0) {
+         $written = fwrite(STDERR, (binary) $err, 1024);
+         if (false === $written) {
+             die(ERR_WRITE_FAILED);
+         }
+         $err = (binary) substr($err, $written);
+    }
+    if (null === $read && strlen($err) < 1) {
+        $write = array_diff($write, array(STDERR));
+    }
+
+    if ($r) {
+        $str = fread(STDIN, 1024);
+        if (false !== $str) {
+            $out .= $str;
+            $err .= $str;
+        }
+        if (false === $str || feof(STDIN)) {
+            $read = null;
+            if (!feof(STDIN)) {
+                die(ERR_READ_FAILED);
+            }
+        }
+    }
+}