1a4cc8d57b
When QFile::open is called with the NewOnly flag, the call will fail if the file already exists. As usual, if the file does not exist, it will be created. Like QTemporaryFile, there is a guarantee from the operating system that you are not accidentally creating a new file on top of an older file. When QFile::open is called with the ExistingOnly flag, the call will fail if the file does not exist. The ExistingOnly flag only provides new functionality when used with the WriteOnly flag. For ReadOnly it provides no change in functionality, as ReadOnly by itself already never creates. Task-number: QTBUG-52244 Change-Id: I8e3206728f245f95172c225bf297023fb078fc6d Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
178 lines
6.0 KiB
C
178 lines
6.0 KiB
C
/****************************************************************************
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**
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** Copyright (C) 2017 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the qmake spec of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 3 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL3 included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 3 requirements
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** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 2.0 or (at your option) the GNU General
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** Public license version 3 or any later version approved by the KDE Free
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** Qt Foundation. The licenses are as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-2.0.html and
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** https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QPLATFORMDEFS_H
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#define QPLATFORMDEFS_H
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// Get Qt defines/settings
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#include "qglobal.h"
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// Set any POSIX/XOPEN defines at the top of this file to turn on specific APIs
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// 1) need to reset default environment if _BSD_SOURCE is defined
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// 2) need to specify POSIX thread interfaces explicitly in glibc 2.0
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// 3) it seems older glibc need this to include the X/Open stuff
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#include <unistd.h>
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// We are hot - unistd.h should have turned on the specific APIs we requested
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#include <features.h>
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#include <pthread.h>
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#include <dirent.h>
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#include <fcntl.h>
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#include <grp.h>
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#include <pwd.h>
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#include <signal.h>
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#include <dlfcn.h>
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <sys/ipc.h>
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#include <sys/time.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#ifndef _GNU_SOURCE
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# define _GNU_SOURCE
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#endif
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#ifdef QT_LARGEFILE_SUPPORT
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#define QT_STATBUF struct stat64
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#define QT_STATBUF4TSTAT struct stat64
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#define QT_STAT ::stat64
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#define QT_FSTAT ::fstat64
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#define QT_LSTAT ::lstat64
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#define QT_OPEN ::open64
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#define QT_TRUNCATE ::truncate64
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#define QT_FTRUNCATE ::ftruncate64
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#define QT_LSEEK ::lseek64
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#else
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#define QT_STATBUF struct stat
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#define QT_STATBUF4TSTAT struct stat
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#define QT_STAT ::stat
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#define QT_FSTAT ::fstat
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#define QT_LSTAT ::lstat
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#define QT_OPEN ::open
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#define QT_TRUNCATE ::truncate
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#define QT_FTRUNCATE ::ftruncate
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#define QT_LSEEK ::lseek
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#endif
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#ifdef QT_LARGEFILE_SUPPORT
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#define QT_FOPEN ::fopen64
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#define QT_FSEEK ::fseeko64
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#define QT_FTELL ::ftello64
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#define QT_FGETPOS ::fgetpos64
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#define QT_FSETPOS ::fsetpos64
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#define QT_MMAP ::mmap64
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#define QT_FPOS_T fpos64_t
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#define QT_OFF_T off64_t
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#else
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#define QT_FOPEN ::fopen
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#define QT_FSEEK ::fseek
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#define QT_FTELL ::ftell
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#define QT_FGETPOS ::fgetpos
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#define QT_FSETPOS ::fsetpos
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#define QT_MMAP ::mmap
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#define QT_FPOS_T fpos_t
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#define QT_OFF_T long
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#endif
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#define QT_STAT_REG S_IFREG
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#define QT_STAT_DIR S_IFDIR
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#define QT_STAT_MASK S_IFMT
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#define QT_STAT_LNK S_IFLNK
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#define QT_SOCKET_CONNECT ::connect
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#define QT_SOCKET_BIND ::bind
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#define QT_FILENO fileno
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#define QT_CLOSE ::close
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#define QT_READ ::read
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#define QT_WRITE ::write
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#define QT_ACCESS ::access
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#define QT_GETCWD ::getcwd
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#define QT_CHDIR ::chdir
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#define QT_MKDIR ::mkdir
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#define QT_RMDIR ::rmdir
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#define QT_OPEN_LARGEFILE O_LARGEFILE
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#define QT_OPEN_RDONLY O_RDONLY
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#define QT_OPEN_WRONLY O_WRONLY
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#define QT_OPEN_RDWR O_RDWR
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#define QT_OPEN_CREAT O_CREAT
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#define QT_OPEN_TRUNC O_TRUNC
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#define QT_OPEN_APPEND O_APPEND
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#define QT_OPEN_EXCL O_EXCL
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// Directory iteration
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#define QT_DIR DIR
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#define QT_OPENDIR ::opendir
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#define QT_CLOSEDIR ::closedir
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#if defined(QT_LARGEFILE_SUPPORT) \
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&& defined(QT_USE_XOPEN_LFS_EXTENSIONS) \
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&& !defined(QT_NO_READDIR64)
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#define QT_DIRENT struct dirent64
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#define QT_READDIR ::readdir64
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#define QT_READDIR_R ::readdir64_r
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#else
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#define QT_DIRENT struct dirent
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#define QT_READDIR ::readdir
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#define QT_READDIR_R ::readdir_r
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#endif
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#define QT_SOCKET_CONNECT ::connect
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#define QT_SOCKET_BIND ::bind
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#define QT_SIGNAL_RETTYPE void
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#define QT_SIGNAL_ARGS int
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#define QT_SIGNAL_IGNORE SIG_IGN
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#define QT_SOCKLEN_T socklen_t
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#if defined(_XOPEN_SOURCE) && (_XOPEN_SOURCE >= 500)
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#define QT_SNPRINTF ::snprintf
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#define QT_VSNPRINTF ::vsnprintf
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#endif
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#endif // QPLATFORMDEFS_H
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