QFileSystemEngine::setFileTime/Unix: remove the fallback to futimesat

The use as in the code:
  futimesat(fd, NULL, &tv)

is not documented to work. The file descriptor should be a directory's
one, not an open file (though the Linux source code seems to handle that
case). This call was done as a fallback to futimes, so it's very
unlikely a system would have futimesat and not futimes.

Both the Linux and the FreeBSD man pages say it's deprecated anyway.

Change-Id: I8d96dea9955d4c749b99fffd14cd94068dc7668a
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>

config.tests/unix/futimesat/futimesat.cpp

@@ -1,47 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2015 Raphael Gozzo <raphael.rg91@gmail.com>
-** Contact: http://www.qt.io/licensing/
-**
-** This file is part of the config.tests of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:LGPL$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include <sys/time.h>
-
-int main(int, char **)
-{
-    futimesat(-1,0,0);
-    return 0;
-}
-

config.tests/unix/futimesat/futimesat.pro

@@ -1 +0,0 @@
-SOURCES += futimesat.cpp

src/corelib/configure.json

@@ -279,11 +279,6 @@
             "type": "compile",
             "test": "unix/futimes"
         },
-        "futimesat": {
-            "label": "futimesat()",
-            "type": "compile",
-            "test": "unix/futimesat"
-        },
         "getauxval": {
             "label": "getauxval()",
             "type": "compile",
@@ -454,11 +449,6 @@
             "condition": "!config.win32 && !features.futimens && tests.futimes",
             "output": [ "privateFeature" ]
         },
-        "futimesat": {
-            "label": "futimesat()",
-            "condition": "!config.win32 && !features.futimens && !features.futimes && tests.futimesat",
-            "output": [ "privateFeature" ]
-        },
         "getauxval": {
             "label": "getauxval()",
             "condition": "config.linux && tests.getauxval",

src/corelib/global/qconfig-bootstrapped.h

@@ -83,7 +83,6 @@
 #define QT_FEATURE_journald -1
 #define QT_FEATURE_futimens -1
 #define QT_FEATURE_futimes -1
-#define QT_FEATURE_futimesat -1
 #define QT_FEATURE_library -1
 #define QT_NO_QOBJECT
 #define QT_FEATURE_process -1

src/corelib/io/qfilesystemengine_unix.cpp

@@ -157,7 +157,7 @@ static bool isPackage(const QFileSystemMetaData &data, const QFileSystemEntry &e
 }
 #endif
 
-#if !QT_CONFIG(futimens) && (QT_CONFIG(futimes) || QT_CONFIG(futimesat))
+#if !QT_CONFIG(futimens) && (QT_CONFIG(futimes))
 namespace {
 namespace GetFileTimes {
 
@@ -873,7 +873,7 @@ bool QFileSystemEngine::setFileTime(int fd, const QDateTime &newDate, QAbstractF
     }
 
     return true;
-#elif QT_CONFIG(futimes) || QT_CONFIG(futimesat)
+#elif QT_CONFIG(futimes)
     struct timeval tv[2];
     QT_STATBUF st;
 
@@ -894,11 +894,7 @@ bool QFileSystemEngine::setFileTime(int fd, const QDateTime &newDate, QAbstractF
         tv[1].tv_usec = (msecs % 1000) * 1000;
     }
 
-#if QT_CONFIG(futimes)
     if (futimes(fd, tv) == -1) {
-#else
-    if (futimesat(fd, NULL, tv) == -1) {
-#endif
         error = QSystemError(errno, QSystemError::StandardLibraryError);
         return false;
     }