From 8226f869250a67e33e1f3b5ddba73975c85b6794 Mon Sep 17 00:00:00 2001
From: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>
Date: Thu, 30 Jun 2011 19:04:24 +0200
Subject: fix argument quoting on windows

quotes prefixed with multiple backslashes would not be escaped
correctly.
---
 src/corelib/io/qprocess_win.cpp | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/src/corelib/io/qprocess_win.cpp b/src/corelib/io/qprocess_win.cpp
index 1761c0e..dba3de4 100644
--- a/src/corelib/io/qprocess_win.cpp
+++ b/src/corelib/io/qprocess_win.cpp
@@ -46,6 +46,7 @@
 #include <qdatetime.h>
 #include <qdir.h>
 #include <qfileinfo.h>
+#include <qregexp.h>
 #include <qtimer.h>
 #include <qthread.h>
 #include <qmutex.h>
@@ -256,10 +257,8 @@ static QString qt_create_commandline(const QString &program, const QStringList &
 
     for (int i=0; i<arguments.size(); ++i) {
         QString tmp = arguments.at(i);
-        // in the case of \" already being in the string the \ must also be escaped
-        tmp.replace( QLatin1String("\\\""), QLatin1String("\\\\\"") );
-        // escape a single " because the arguments will be parsed
-        tmp.replace( QLatin1Char('\"'), QLatin1String("\\\"") );
+        // Quotes are escaped and their preceding backslashes are doubled.
+        tmp.replace(QRegExp(QLatin1String("(\\\\*)\"")), QLatin1String("\\1\\1\\\""));
         if (tmp.isEmpty() || tmp.contains(QLatin1Char(' ')) || tmp.contains(QLatin1Char('\t'))) {
             // The argument must not end with a \ since this would be interpreted
             // as escaping the quote -- rather put the \ behind the quote: e.g.
-- 
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