Windows-4.7.4/src/corelib/io/qfilesystemwatcher_inotify.cpp - platform/external/qt - Git at Google

 /****************************************************************************
 **
 ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** GNU Lesser General Public License Usage
 ** This file may be used under the terms of the GNU Lesser General Public
 ** License version 2.1 as published by the Free Software Foundation and
 ** appearing in the file LICENSE.LGPL included in the packaging of this
 ** file. Please review the following information to ensure the GNU Lesser
 ** General Public License version 2.1 requirements will be met:
 ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
 **
 ** In addition, as a special exception, Nokia gives you certain additional
 ** rights. These rights are described in the Nokia Qt LGPL Exception
 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
 **
 ** GNU General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU General
 ** Public License version 3.0 as published by the Free Software Foundation
 ** and appearing in the file LICENSE.GPL included in the packaging of this
 ** file. Please review the following information to ensure the GNU General
 ** Public License version 3.0 requirements will be met:
 ** http://www.gnu.org/copyleft/gpl.html.
 **
 ** Other Usage
 ** Alternatively, this file may be used in accordance with the terms and
 ** conditions contained in a signed written agreement between you and Nokia.
 **
 **
 **
 **
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #include "qfilesystemwatcher.h"
 #include "qfilesystemwatcher_inotify_p.h"

 #ifndef QT_NO_FILESYSTEMWATCHER

 #include "private/qcore_unix_p.h"

 #include <qdebug.h>
 #include <qfile.h>
 #include <qfileinfo.h>
 #include <qsocketnotifier.h>
 #include <qvarlengtharray.h>

 #include <sys/syscall.h>
 #include <sys/ioctl.h>
 #include <unistd.h>
 #include <fcntl.h>

 #if defined(QT_NO_INOTIFY)
 #include <linux/types.h>

 #if defined(__i386__)
 # define __NR_inotify_init      291
 # define __NR_inotify_add_watch 292
 # define __NR_inotify_rm_watch  293
 # define __NR_inotify_init1     332
 #elif defined(__x86_64__)
 # define __NR_inotify_init      253
 # define __NR_inotify_add_watch 254
 # define __NR_inotify_rm_watch  255
 # define __NR_inotify_init1     294
 #elif defined(__powerpc__) || defined(__powerpc64__)
 # define __NR_inotify_init      275
 # define __NR_inotify_add_watch 276
 # define __NR_inotify_rm_watch  277
 # define __NR_inotify_init1     318
 #elif defined (__ia64__)
 # define __NR_inotify_init      1277
 # define __NR_inotify_add_watch 1278
 # define __NR_inotify_rm_watch  1279
 # define __NR_inotify_init1     1318
 #elif defined (__s390__) || defined (__s390x__)
 # define __NR_inotify_init      284
 # define __NR_inotify_add_watch 285
 # define __NR_inotify_rm_watch  286
 # define __NR_inotify_init1     324
 #elif defined (__alpha__)
 # define __NR_inotify_init      444
 # define __NR_inotify_add_watch 445
 # define __NR_inotify_rm_watch  446
 // no inotify_init1 for the Alpha
 #elif defined (__sparc__) || defined (__sparc64__)
 # define __NR_inotify_init      151
 # define __NR_inotify_add_watch 152
 # define __NR_inotify_rm_watch  156
 # define __NR_inotify_init1     322
 #elif defined (__arm__)
 # define __NR_inotify_init      316
 # define __NR_inotify_add_watch 317
 # define __NR_inotify_rm_watch  318
 # define __NR_inotify_init1     360
 #elif defined (__sh__)
 # define __NR_inotify_init      290
 # define __NR_inotify_add_watch 291
 # define __NR_inotify_rm_watch  292
 # define __NR_inotify_init1     332
 #elif defined (__sh64__)
 # define __NR_inotify_init      318
 # define __NR_inotify_add_watch 319
 # define __NR_inotify_rm_watch  320
 # define __NR_inotify_init1     360
 #elif defined (__mips__)
 # define __NR_inotify_init      284
 # define __NR_inotify_add_watch 285
 # define __NR_inotify_rm_watch  286
 # define __NR_inotify_init1     329
 #elif defined (__hppa__)
 # define __NR_inotify_init      269
 # define __NR_inotify_add_watch 270
 # define __NR_inotify_rm_watch  271
 # define __NR_inotify_init1     314
 #elif defined (__avr32__)
 # define __NR_inotify_init	240
 # define __NR_inotify_add_watch	241
 # define __NR_inotify_rm_watch	242
 // no inotify_init1 for AVR32
 #elif defined (__mc68000__)
 # define __NR_inotify_init      284
 # define __NR_inotify_add_watch 285
 # define __NR_inotify_rm_watch  286
 # define __NR_inotify_init1     328
 #else
 # error "This architecture is not supported. Please talk to qt-bugs@trolltech.com"
 #endif

 #if !defined(IN_CLOEXEC) && defined(O_CLOEXEC) && defined(__NR_inotify_init1)
 # define IN_CLOEXEC              O_CLOEXEC
 #endif

 QT_BEGIN_NAMESPACE

 #ifdef QT_LINUXBASE
 // ### the LSB doesn't standardize syscall, need to wait until glib2.4 is standardized
 static inline int syscall(...) { return -1; }
 #endif

 static inline int inotify_init()
 {
     return syscall(__NR_inotify_init);
 }

 static inline int inotify_add_watch(int fd, const char *name, __u32 mask)
 {
     return syscall(__NR_inotify_add_watch, fd, name, mask);
 }

 static inline int inotify_rm_watch(int fd, __u32 wd)
 {
     return syscall(__NR_inotify_rm_watch, fd, wd);
 }

 #ifdef IN_CLOEXEC
 static inline int inotify_init1(int flags)
 {
     return syscall(__NR_inotify_init1, flags);
 }
 #endif

 // the following struct and values are documented in linux/inotify.h
 extern "C" {

 struct inotify_event {
         __s32           wd;
         __u32           mask;
         __u32           cookie;
         __u32           len;
         char            name[0];
 };

 #define IN_ACCESS               0x00000001
 #define IN_MODIFY               0x00000002
 #define IN_ATTRIB               0x00000004
 #define IN_CLOSE_WRITE          0x00000008
 #define IN_CLOSE_NOWRITE        0x00000010
 #define IN_OPEN                 0x00000020
 #define IN_MOVED_FROM           0x00000040
 #define IN_MOVED_TO             0x00000080
 #define IN_CREATE               0x00000100
 #define IN_DELETE               0x00000200
 #define IN_DELETE_SELF          0x00000400
 #define IN_MOVE_SELF            0x00000800
 #define IN_UNMOUNT              0x00002000
 #define IN_Q_OVERFLOW           0x00004000
 #define IN_IGNORED              0x00008000

 #define IN_CLOSE                (IN_CLOSE_WRITE | IN_CLOSE_NOWRITE)
 #define IN_MOVE                 (IN_MOVED_FROM | IN_MOVED_TO)
 }

 QT_END_NAMESPACE

 // --------- inotify.h end ----------

 #else /* QT_NO_INOTIFY */

 #include <sys/inotify.h>

 #endif

 QT_BEGIN_NAMESPACE

 QInotifyFileSystemWatcherEngine *QInotifyFileSystemWatcherEngine::create()
 {
     register int fd = -1;
 #ifdef IN_CLOEXEC
     fd = inotify_init1(IN_CLOEXEC);
 #endif
     if (fd == -1) {
         fd = inotify_init();
         if (fd == -1)
             return 0;
         ::fcntl(fd, F_SETFD, FD_CLOEXEC);
     }
     return new QInotifyFileSystemWatcherEngine(fd);
 }

 QInotifyFileSystemWatcherEngine::QInotifyFileSystemWatcherEngine(int fd)
     : inotifyFd(fd)
 {
     fcntl(inotifyFd, F_SETFD, FD_CLOEXEC);

     moveToThread(this);
 }

 QInotifyFileSystemWatcherEngine::~QInotifyFileSystemWatcherEngine()
 {
     foreach (int id, pathToID)
         inotify_rm_watch(inotifyFd, id < 0 ? -id : id);

     ::close(inotifyFd);
 }

 void QInotifyFileSystemWatcherEngine::run()
 {
     QSocketNotifier sn(inotifyFd, QSocketNotifier::Read, this);
     connect(&sn, SIGNAL(activated(int)), SLOT(readFromInotify()));
     (void) exec();
 }

 QStringList QInotifyFileSystemWatcherEngine::addPaths(const QStringList &paths,
                                                       QStringList *files,
                                                       QStringList *directories)
 {
     QMutexLocker locker(&mutex);

     QStringList p = paths;
     QMutableListIterator<QString> it(p);
     while (it.hasNext()) {
         QString path = it.next();
         QFileInfo fi(path);
         bool isDir = fi.isDir();
         if (isDir) {
             if (directories->contains(path))
                 continue;
         } else {
             if (files->contains(path))
                 continue;
         }

         int wd = inotify_add_watch(inotifyFd,
                                    QFile::encodeName(path),
                                    (isDir
                                     ? (0
                                        | IN_ATTRIB
                                        | IN_MOVE
                                        | IN_CREATE
                                        | IN_DELETE
                                        | IN_DELETE_SELF
                                        )
                                     : (0
                                        | IN_ATTRIB
                                        | IN_MODIFY
                                        | IN_MOVE
                                        | IN_MOVE_SELF
                                        | IN_DELETE_SELF
                                        )));
         if (wd <= 0) {
             perror("QInotifyFileSystemWatcherEngine::addPaths: inotify_add_watch failed");
             continue;
         }

         it.remove();

         int id = isDir ? -wd : wd;
         if (id < 0) {
             directories->append(path);
         } else {
             files->append(path);
         }

         pathToID.insert(path, id);
         idToPath.insert(id, path);
     }

     start();

     return p;
 }

 QStringList QInotifyFileSystemWatcherEngine::removePaths(const QStringList &paths,
                                                          QStringList *files,
                                                          QStringList *directories)
 {
     QMutexLocker locker(&mutex);

     QStringList p = paths;
     QMutableListIterator<QString> it(p);
     while (it.hasNext()) {
         QString path = it.next();
         int id = pathToID.take(path);
         QString x = idToPath.take(id);
         if (x.isEmpty() || x != path)
             continue;

         int wd = id < 0 ? -id : id;
         // qDebug() << "removing watch for path" << path << "wd" << wd;
         inotify_rm_watch(inotifyFd, wd);

         it.remove();
         if (id < 0) {
             directories->removeAll(path);
         } else {
             files->removeAll(path);
         }
     }

     return p;
 }

 void QInotifyFileSystemWatcherEngine::stop()
 {
     QMetaObject::invokeMethod(this, "quit");
 }

 void QInotifyFileSystemWatcherEngine::readFromInotify()
 {
     QMutexLocker locker(&mutex);

     // qDebug() << "QInotifyFileSystemWatcherEngine::readFromInotify";

     int buffSize = 0;
     ioctl(inotifyFd, FIONREAD, (char *) &buffSize);
     QVarLengthArray<char, 4096> buffer(buffSize);
     buffSize = read(inotifyFd, buffer.data(), buffSize);
     const char *at = buffer.data();
     const char * const end = at + buffSize;

     QMap<int, inotify_event> eventForId;
     while (at < end) {
         const inotify_event *event = reinterpret_cast<const inotify_event *>(at);

         if (eventForId.contains(event->wd))
             eventForId[event->wd].mask |= event->mask;
         else
             eventForId.insert(event->wd, *event);

         at += sizeof(inotify_event) + event->len;
     }

     QMap<int, inotify_event>::const_iterator it = eventForId.constBegin();
     while (it != eventForId.constEnd()) {
         inotify_event event = *it;
         ++it;

         // qDebug() << "inotify event, wd" << event.wd << "mask" << hex << event.mask;

         int id = event.wd;
         QString path = idToPath.value(id);
         if (path.isEmpty()) {
             // perhaps a directory?
             id = -id;
             path = idToPath.value(id);
             if (path.isEmpty())
                 continue;
         }

         // qDebug() << "event for path" << path;

         if ((event.mask & (IN_DELETE_SELF | IN_MOVE_SELF | IN_UNMOUNT)) != 0) {
             pathToID.remove(path);
             idToPath.remove(id);
             inotify_rm_watch(inotifyFd, event.wd);

             if (id < 0)
                 emit directoryChanged(path, true);
             else
                 emit fileChanged(path, true);
         } else {
             if (id < 0)
                 emit directoryChanged(path, false);
             else
                 emit fileChanged(path, false);
         }
     }
 }

 QT_END_NAMESPACE

 #endif // QT_NO_FILESYSTEMWATCHER
	/****************************************************************************
	**
	** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
	** All rights reserved.
	** Contact: Nokia Corporation (qt-info@nokia.com)
	**
	** This file is part of the QtCore module of the Qt Toolkit.
	**
	** $QT_BEGIN_LICENSE:LGPL$
	** GNU Lesser General Public License Usage
	** This file may be used under the terms of the GNU Lesser General Public
	** License version 2.1 as published by the Free Software Foundation and
	** appearing in the file LICENSE.LGPL included in the packaging of this
	** file. Please review the following information to ensure the GNU Lesser
	** General Public License version 2.1 requirements will be met:
	** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
	**
	** In addition, as a special exception, Nokia gives you certain additional
	** rights. These rights are described in the Nokia Qt LGPL Exception
	** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
	**
	** GNU General Public License Usage
	** Alternatively, this file may be used under the terms of the GNU General
	** Public License version 3.0 as published by the Free Software Foundation
	** and appearing in the file LICENSE.GPL included in the packaging of this
	** file. Please review the following information to ensure the GNU General
	** Public License version 3.0 requirements will be met:
	** http://www.gnu.org/copyleft/gpl.html.
	**
	** Other Usage
	** Alternatively, this file may be used in accordance with the terms and
	** conditions contained in a signed written agreement between you and Nokia.
	**
	**
	**
	**
	**
	** $QT_END_LICENSE$
	**
	****************************************************************************/

	#include "qfilesystemwatcher.h"
	#include "qfilesystemwatcher_inotify_p.h"

	#ifndef QT_NO_FILESYSTEMWATCHER

	#include "private/qcore_unix_p.h"

	#include <qdebug.h>
	#include <qfile.h>
	#include <qfileinfo.h>
	#include <qsocketnotifier.h>
	#include <qvarlengtharray.h>

	#include <sys/syscall.h>
	#include <sys/ioctl.h>
	#include <unistd.h>
	#include <fcntl.h>

	#if defined(QT_NO_INOTIFY)
	#include <linux/types.h>

	#if defined(__i386__)
	# define __NR_inotify_init 291
	# define __NR_inotify_add_watch 292
	# define __NR_inotify_rm_watch 293
	# define __NR_inotify_init1 332
	#elif defined(__x86_64__)
	# define __NR_inotify_init 253
	# define __NR_inotify_add_watch 254
	# define __NR_inotify_rm_watch 255
	# define __NR_inotify_init1 294
	#elif defined(__powerpc__) \|\| defined(__powerpc64__)
	# define __NR_inotify_init 275
	# define __NR_inotify_add_watch 276
	# define __NR_inotify_rm_watch 277
	# define __NR_inotify_init1 318
	#elif defined (__ia64__)
	# define __NR_inotify_init 1277
	# define __NR_inotify_add_watch 1278
	# define __NR_inotify_rm_watch 1279
	# define __NR_inotify_init1 1318
	#elif defined (__s390__) \|\| defined (__s390x__)
	# define __NR_inotify_init 284
	# define __NR_inotify_add_watch 285
	# define __NR_inotify_rm_watch 286
	# define __NR_inotify_init1 324
	#elif defined (__alpha__)
	# define __NR_inotify_init 444
	# define __NR_inotify_add_watch 445
	# define __NR_inotify_rm_watch 446
	// no inotify_init1 for the Alpha
	#elif defined (__sparc__) \|\| defined (__sparc64__)
	# define __NR_inotify_init 151
	# define __NR_inotify_add_watch 152
	# define __NR_inotify_rm_watch 156
	# define __NR_inotify_init1 322
	#elif defined (__arm__)
	# define __NR_inotify_init 316
	# define __NR_inotify_add_watch 317
	# define __NR_inotify_rm_watch 318
	# define __NR_inotify_init1 360
	#elif defined (__sh__)
	# define __NR_inotify_init 290
	# define __NR_inotify_add_watch 291
	# define __NR_inotify_rm_watch 292
	# define __NR_inotify_init1 332
	#elif defined (__sh64__)
	# define __NR_inotify_init 318
	# define __NR_inotify_add_watch 319
	# define __NR_inotify_rm_watch 320
	# define __NR_inotify_init1 360
	#elif defined (__mips__)
	# define __NR_inotify_init 284
	# define __NR_inotify_add_watch 285
	# define __NR_inotify_rm_watch 286
	# define __NR_inotify_init1 329
	#elif defined (__hppa__)
	# define __NR_inotify_init 269
	# define __NR_inotify_add_watch 270
	# define __NR_inotify_rm_watch 271
	# define __NR_inotify_init1 314
	#elif defined (__avr32__)
	# define __NR_inotify_init 240
	# define __NR_inotify_add_watch 241
	# define __NR_inotify_rm_watch 242
	// no inotify_init1 for AVR32
	#elif defined (__mc68000__)
	# define __NR_inotify_init 284
	# define __NR_inotify_add_watch 285
	# define __NR_inotify_rm_watch 286
	# define __NR_inotify_init1 328
	#else
	# error "This architecture is not supported. Please talk to qt-bugs@trolltech.com"
	#endif

	#if !defined(IN_CLOEXEC) && defined(O_CLOEXEC) && defined(__NR_inotify_init1)
	# define IN_CLOEXEC O_CLOEXEC
	#endif

	QT_BEGIN_NAMESPACE

	#ifdef QT_LINUXBASE
	// ### the LSB doesn't standardize syscall, need to wait until glib2.4 is standardized
	static inline int syscall(...) { return -1; }
	#endif

	static inline int inotify_init()
	{
	return syscall(__NR_inotify_init);
	}

	static inline int inotify_add_watch(int fd, const char *name, __u32 mask)
	{
	return syscall(__NR_inotify_add_watch, fd, name, mask);
	}

	static inline int inotify_rm_watch(int fd, __u32 wd)
	{
	return syscall(__NR_inotify_rm_watch, fd, wd);
	}

	#ifdef IN_CLOEXEC
	static inline int inotify_init1(int flags)
	{
	return syscall(__NR_inotify_init1, flags);
	}
	#endif

	// the following struct and values are documented in linux/inotify.h
	extern "C" {

	struct inotify_event {
	__s32 wd;
	__u32 mask;
	__u32 cookie;
	__u32 len;
	char name[0];
	};

	#define IN_ACCESS 0x00000001
	#define IN_MODIFY 0x00000002
	#define IN_ATTRIB 0x00000004
	#define IN_CLOSE_WRITE 0x00000008
	#define IN_CLOSE_NOWRITE 0x00000010
	#define IN_OPEN 0x00000020
	#define IN_MOVED_FROM 0x00000040
	#define IN_MOVED_TO 0x00000080
	#define IN_CREATE 0x00000100
	#define IN_DELETE 0x00000200
	#define IN_DELETE_SELF 0x00000400
	#define IN_MOVE_SELF 0x00000800
	#define IN_UNMOUNT 0x00002000
	#define IN_Q_OVERFLOW 0x00004000
	#define IN_IGNORED 0x00008000

	#define IN_CLOSE (IN_CLOSE_WRITE \| IN_CLOSE_NOWRITE)
	#define IN_MOVE (IN_MOVED_FROM \| IN_MOVED_TO)
	}

	QT_END_NAMESPACE

	// --------- inotify.h end ----------

	#else /* QT_NO_INOTIFY */

	#include <sys/inotify.h>

	#endif

	QT_BEGIN_NAMESPACE

	QInotifyFileSystemWatcherEngine *QInotifyFileSystemWatcherEngine::create()
	{
	register int fd = -1;
	#ifdef IN_CLOEXEC
	fd = inotify_init1(IN_CLOEXEC);
	#endif
	if (fd == -1) {
	fd = inotify_init();
	if (fd == -1)
	return 0;
	::fcntl(fd, F_SETFD, FD_CLOEXEC);
	}
	return new QInotifyFileSystemWatcherEngine(fd);
	}

	QInotifyFileSystemWatcherEngine::QInotifyFileSystemWatcherEngine(int fd)
	: inotifyFd(fd)
	{
	fcntl(inotifyFd, F_SETFD, FD_CLOEXEC);

	moveToThread(this);
	}

	QInotifyFileSystemWatcherEngine::~QInotifyFileSystemWatcherEngine()
	{
	foreach (int id, pathToID)
	inotify_rm_watch(inotifyFd, id < 0 ? -id : id);

	::close(inotifyFd);
	}

	void QInotifyFileSystemWatcherEngine::run()
	{
	QSocketNotifier sn(inotifyFd, QSocketNotifier::Read, this);
	connect(&sn, SIGNAL(activated(int)), SLOT(readFromInotify()));
	(void) exec();
	}

	QStringList QInotifyFileSystemWatcherEngine::addPaths(const QStringList &paths,
	QStringList *files,
	QStringList *directories)
	{
	QMutexLocker locker(&mutex);

	QStringList p = paths;
	QMutableListIterator<QString> it(p);
	while (it.hasNext()) {
	QString path = it.next();
	QFileInfo fi(path);
	bool isDir = fi.isDir();
	if (isDir) {
	if (directories->contains(path))
	continue;
	} else {
	if (files->contains(path))
	continue;
	}

	int wd = inotify_add_watch(inotifyFd,
	QFile::encodeName(path),
	(isDir
	? (0
	\| IN_ATTRIB
	\| IN_MOVE
	\| IN_CREATE
	\| IN_DELETE
	\| IN_DELETE_SELF
	)
	: (0
	\| IN_ATTRIB
	\| IN_MODIFY
	\| IN_MOVE
	\| IN_MOVE_SELF
	\| IN_DELETE_SELF
	)));
	if (wd <= 0) {
	perror("QInotifyFileSystemWatcherEngine::addPaths: inotify_add_watch failed");
	continue;
	}

	it.remove();

	int id = isDir ? -wd : wd;
	if (id < 0) {
	directories->append(path);
	} else {
	files->append(path);
	}

	pathToID.insert(path, id);
	idToPath.insert(id, path);
	}

	start();

	return p;
	}

	QStringList QInotifyFileSystemWatcherEngine::removePaths(const QStringList &paths,
	QStringList *files,
	QStringList *directories)
	{
	QMutexLocker locker(&mutex);

	QStringList p = paths;
	QMutableListIterator<QString> it(p);
	while (it.hasNext()) {
	QString path = it.next();
	int id = pathToID.take(path);
	QString x = idToPath.take(id);
	if (x.isEmpty() \|\| x != path)
	continue;

	int wd = id < 0 ? -id : id;
	// qDebug() << "removing watch for path" << path << "wd" << wd;
	inotify_rm_watch(inotifyFd, wd);

	it.remove();
	if (id < 0) {
	directories->removeAll(path);
	} else {
	files->removeAll(path);
	}
	}

	return p;
	}

	void QInotifyFileSystemWatcherEngine::stop()
	{
	QMetaObject::invokeMethod(this, "quit");
	}

	void QInotifyFileSystemWatcherEngine::readFromInotify()
	{
	QMutexLocker locker(&mutex);

	// qDebug() << "QInotifyFileSystemWatcherEngine::readFromInotify";

	int buffSize = 0;
	ioctl(inotifyFd, FIONREAD, (char *) &buffSize);
	QVarLengthArray<char, 4096> buffer(buffSize);
	buffSize = read(inotifyFd, buffer.data(), buffSize);
	const char *at = buffer.data();
	const char * const end = at + buffSize;

	QMap<int, inotify_event> eventForId;
	while (at < end) {
	const inotify_event event = reinterpret_cast<const inotify_event >(at);

	if (eventForId.contains(event->wd))
	eventForId[event->wd].mask \|= event->mask;
	else
	eventForId.insert(event->wd, *event);

	at += sizeof(inotify_event) + event->len;
	}

	QMap<int, inotify_event>::const_iterator it = eventForId.constBegin();
	while (it != eventForId.constEnd()) {
	inotify_event event = *it;
	++it;

	// qDebug() << "inotify event, wd" << event.wd << "mask" << hex << event.mask;

	int id = event.wd;
	QString path = idToPath.value(id);
	if (path.isEmpty()) {
	// perhaps a directory?
	id = -id;
	path = idToPath.value(id);
	if (path.isEmpty())
	continue;
	}

	// qDebug() << "event for path" << path;

	if ((event.mask & (IN_DELETE_SELF \| IN_MOVE_SELF \| IN_UNMOUNT)) != 0) {
	pathToID.remove(path);
	idToPath.remove(id);
	inotify_rm_watch(inotifyFd, event.wd);

	if (id < 0)
	emit directoryChanged(path, true);
	else
	emit fileChanged(path, true);
	} else {
	if (id < 0)
	emit directoryChanged(path, false);
	else
	emit fileChanged(path, false);
	}
	}
	}

	QT_END_NAMESPACE

	#endif // QT_NO_FILESYSTEMWATCHER