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-rw-r--r--src/corelib/kernel/qsharedmemory_posix.cpp236
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diff --git a/src/corelib/kernel/qsharedmemory_posix.cpp b/src/corelib/kernel/qsharedmemory_posix.cpp
deleted file mode 100644
index 80f9a35651..0000000000
--- a/src/corelib/kernel/qsharedmemory_posix.cpp
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-/****************************************************************************
-**
-** Copyright (C) 2015 Konstantin Ritt <ritt.ks@gmail.com>
-** Copyright (C) 2016 The Qt Company Ltd.
-** Copyright (C) 2015 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Tobias Koenig <tobias.koenig@kdab.com>
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the QtCore module 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 "qplatformdefs.h"
-
-#include "qsharedmemory.h"
-#include "qsharedmemory_p.h"
-#include "qsystemsemaphore.h"
-#include <qfile.h>
-
-#include <errno.h>
-
-#ifdef QT_POSIX_IPC
-
-#ifndef QT_NO_SHAREDMEMORY
-#include <sys/types.h>
-#include <sys/mman.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <unistd.h>
-
-#include "private/qcore_unix_p.h"
-
-QT_BEGIN_NAMESPACE
-
-int QSharedMemoryPrivate::handle()
-{
- // don't allow making handles on empty keys
- const QString safeKey = makePlatformSafeKey(key);
- if (safeKey.isEmpty()) {
- errorString = QSharedMemory::tr("%1: key is empty").arg(QLatin1String("QSharedMemory::handle"));
- error = QSharedMemory::KeyError;
- return 0;
- }
-
- return 1;
-}
-
-bool QSharedMemoryPrivate::cleanHandle()
-{
- qt_safe_close(hand);
- hand = -1;
-
- return true;
-}
-
-bool QSharedMemoryPrivate::create(int size)
-{
- if (!handle())
- return false;
-
- const QByteArray shmName = QFile::encodeName(makePlatformSafeKey(key));
-
- int fd;
-#ifdef O_CLOEXEC
- // First try with O_CLOEXEC flag, if that fails, fall back to normal flags
- EINTR_LOOP(fd, ::shm_open(shmName.constData(), O_RDWR | O_CREAT | O_EXCL | O_CLOEXEC, 0600));
- if (fd == -1)
- EINTR_LOOP(fd, ::shm_open(shmName.constData(), O_RDWR | O_CREAT | O_EXCL, 0600));
-#else
- EINTR_LOOP(fd, ::shm_open(shmName.constData(), O_RDWR | O_CREAT | O_EXCL, 0600));
-#endif
- if (fd == -1) {
- const int errorNumber = errno;
- const QLatin1String function("QSharedMemory::attach (shm_open)");
- switch (errorNumber) {
- case ENAMETOOLONG:
- case EINVAL:
- errorString = QSharedMemory::tr("%1: bad name").arg(function);
- error = QSharedMemory::KeyError;
- break;
- default:
- setErrorString(function);
- }
- return false;
- }
-
- // the size may only be set once
- int ret;
- EINTR_LOOP(ret, QT_FTRUNCATE(fd, size));
- if (ret == -1) {
- setErrorString(QLatin1String("QSharedMemory::create (ftruncate)"));
- qt_safe_close(fd);
- return false;
- }
-
- qt_safe_close(fd);
-
- return true;
-}
-
-bool QSharedMemoryPrivate::attach(QSharedMemory::AccessMode mode)
-{
- const QByteArray shmName = QFile::encodeName(makePlatformSafeKey(key));
-
- const int oflag = (mode == QSharedMemory::ReadOnly ? O_RDONLY : O_RDWR);
- const mode_t omode = (mode == QSharedMemory::ReadOnly ? 0400 : 0600);
-
-#ifdef O_CLOEXEC
- // First try with O_CLOEXEC flag, if that fails, fall back to normal flags
- EINTR_LOOP(hand, ::shm_open(shmName.constData(), oflag | O_CLOEXEC, omode));
- if (hand == -1)
- EINTR_LOOP(hand, ::shm_open(shmName.constData(), oflag, omode));
-#else
- EINTR_LOOP(hand, ::shm_open(shmName.constData(), oflag, omode));
-#endif
- if (hand == -1) {
- const int errorNumber = errno;
- const QLatin1String function("QSharedMemory::attach (shm_open)");
- switch (errorNumber) {
- case ENAMETOOLONG:
- case EINVAL:
- errorString = QSharedMemory::tr("%1: bad name").arg(function);
- error = QSharedMemory::KeyError;
- break;
- default:
- setErrorString(function);
- }
- hand = -1;
- return false;
- }
-
- // grab the size
- QT_STATBUF st;
- if (QT_FSTAT(hand, &st) == -1) {
- setErrorString(QLatin1String("QSharedMemory::attach (fstat)"));
- cleanHandle();
- return false;
- }
- size = st.st_size;
-
- // grab the memory
- const int mprot = (mode == QSharedMemory::ReadOnly ? PROT_READ : PROT_READ | PROT_WRITE);
- memory = QT_MMAP(0, size, mprot, MAP_SHARED, hand, 0);
- if (memory == MAP_FAILED || !memory) {
- setErrorString(QLatin1String("QSharedMemory::attach (mmap)"));
- cleanHandle();
- memory = 0;
- size = 0;
- return false;
- }
-
-#ifdef F_ADD_SEALS
- // Make sure the shared memory region will not shrink
- // otherwise someone could cause SIGBUS on us.
- // (see http://lwn.net/Articles/594919/)
- fcntl(hand, F_ADD_SEALS, F_SEAL_SHRINK);
-#endif
-
- return true;
-}
-
-bool QSharedMemoryPrivate::detach()
-{
- // detach from the memory segment
- if (::munmap(memory, size) == -1) {
- setErrorString(QLatin1String("QSharedMemory::detach (munmap)"));
- return false;
- }
- memory = 0;
- size = 0;
-
-#ifdef Q_OS_QNX
- // On QNX the st_nlink field of struct stat contains the number of
- // active shm_open() connections to the shared memory file, so we
- // can use it to automatically clean up the file once the last
- // user has detached from it.
-
- // get the number of current attachments
- int shm_nattch = 0;
- QT_STATBUF st;
- if (QT_FSTAT(hand, &st) == 0) {
- // subtract 2 from linkcount: one for our own open and one for the dir entry
- shm_nattch = st.st_nlink - 2;
- }
-
- cleanHandle();
-
- // if there are no attachments then unlink the shared memory
- if (shm_nattch == 0) {
- const QByteArray shmName = QFile::encodeName(makePlatformSafeKey(key));
- if (::shm_unlink(shmName.constData()) == -1 && errno != ENOENT)
- setErrorString(QLatin1String("QSharedMemory::detach (shm_unlink)"));
- }
-#else
- // On non-QNX systems (tested Linux and Haiku), the st_nlink field is always 1,
- // so we'll simply leak the shared memory files.
- cleanHandle();
-#endif
-
- return true;
-}
-
-QT_END_NAMESPACE
-
-#endif // QT_NO_SHAREDMEMORY
-
-#endif // QT_POSIX_IPC