kio Library API Documentation

kdirwatch.cpp

00001 // -*- c-basic-offset: 2 -*-
00002 /* This file is part of the KDE libraries
00003    Copyright (C) 1998 Sven Radej <sven@lisa.exp.univie.ac.at>
00004 
00005    This library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Library General Public
00007    License version 2 as published by the Free Software Foundation.
00008 
00009    This library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Library General Public License for more details.
00013 
00014    You should have received a copy of the GNU Library General Public License
00015    along with this library; see the file COPYING.LIB.  If not, write to
00016    the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
00017    Boston, MA 02111-1307, USA.
00018 */
00019 
00020 
00021 // CHANGES:
00022 // Februar 2002 - Add file watching and remote mount check for STAT
00023 // Mar 30, 2001 - Native support for Linux dir change notification.
00024 // Jan 28, 2000 - Usage of FAM service on IRIX (Josef.Weidendorfer@in.tum.de)
00025 // May 24. 1998 - List of times introduced, and some bugs are fixed. (sven)
00026 // May 23. 1998 - Removed static pointer - you can have more instances.
00027 // It was Needed for KRegistry. KDirWatch now emits signals and doesn't
00028 // call (or need) KFM. No more URL's - just plain paths. (sven)
00029 // Mar 29. 1998 - added docs, stop/restart for particular Dirs and
00030 // deep copies for list of dirs. (sven)
00031 // Mar 28. 1998 - Created.  (sven)
00032 
00033 
00034 #include <config.h>
00035 
00036 #ifdef HAVE_DNOTIFY
00037 #include <unistd.h>
00038 #include <time.h>
00039 #include <fcntl.h>
00040 #include <signal.h>
00041 #include <errno.h>
00042 #endif
00043 
00044 #include <sys/stat.h>
00045 #include <assert.h>
00046 #include <qdir.h>
00047 #include <qfile.h>
00048 #include <qintdict.h>
00049 #include <qptrlist.h>
00050 #include <qsocketnotifier.h>
00051 #include <qstringlist.h>
00052 #include <qtimer.h>
00053 
00054 #include <kapplication.h>
00055 #include <kdebug.h>
00056 #include <kconfig.h>
00057 #include <kglobal.h>
00058 #include <kstaticdeleter.h>
00059 
00060 #include "kdirwatch.h"
00061 #include "kdirwatch_p.h"
00062 #include "global.h" //  KIO::probably_slow_mounted
00063 
00064 #define NO_NOTIFY (time_t) 0
00065 
00066 static KDirWatchPrivate* dwp_self = 0;
00067 
00068 #ifdef HAVE_DNOTIFY
00069 
00070 #include <sys/utsname.h>
00071 
00072 static int dnotify_signal = 0;
00073 
00074 /* DNOTIFY signal handler
00075  *
00076  * As this is called asynchronously, only a flag is set and
00077  * a rescan is requested.
00078  * This is done by writing into a pipe to trigger a QSocketNotifier
00079  * watching on this pipe: a timer is started and after a timeout,
00080  * the rescan is done.
00081  */
00082 void KDirWatchPrivate::dnotify_handler(int, siginfo_t *si, void *)
00083 {
00084   if (!dwp_self) return;
00085 
00086   // write might change errno, we have to save it and restore it
00087   // (Richard Stevens, Advanced programming in the Unix Environment)
00088   int saved_errno = errno;
00089 
00090   Entry* e = dwp_self->fd_Entry.find(si->si_fd);
00091 
00092 //  kdDebug(7001) << "DNOTIFY Handler: fd " << si->si_fd << " path "
00093 //      << QString(e ? e->path:"unknown") << endl;
00094 
00095   if(!e || e->dn_fd != si->si_fd) {
00096     qDebug("fatal error in KDirWatch");
00097   } else
00098     e->dirty = true;
00099 
00100   char c = 0;
00101   write(dwp_self->mPipe[1], &c, 1);
00102   errno = saved_errno;
00103 }
00104 
00105 static struct sigaction old_sigio_act;
00106 /* DNOTIFY SIGIO signal handler
00107  *
00108  * When the kernel queue for the dnotify_signal overflows, a SIGIO is send.
00109  */
00110 void KDirWatchPrivate::dnotify_sigio_handler(int sig, siginfo_t *si, void *p)
00111 {
00112   if (dwp_self)
00113   {
00114     // write might change errno, we have to save it and restore it
00115     // (Richard Stevens, Advanced programming in the Unix Environment)
00116     int saved_errno = errno;
00117 
00118     dwp_self->rescan_all = true;
00119     char c = 0;
00120     write(dwp_self->mPipe[1], &c, 1);
00121 
00122     errno = saved_errno;
00123   }
00124 
00125   // Call previous signal handler
00126   if (old_sigio_act.sa_flags & SA_SIGINFO)
00127   {
00128     if (old_sigio_act.sa_sigaction)
00129       (*old_sigio_act.sa_sigaction)(sig, si, p);
00130   }
00131   else
00132   {
00133     if ((old_sigio_act.sa_handler != SIG_DFL) &&
00134         (old_sigio_act.sa_handler != SIG_IGN))
00135       (*old_sigio_act.sa_handler)(sig);
00136   }
00137 }
00138 #endif
00139 
00140 
00141 //
00142 // Class KDirWatchPrivate (singleton)
00143 //
00144 
00145 /* All entries (files/directories) to be watched in the
00146  * application (coming from multiple KDirWatch instances)
00147  * are registered in a single KDirWatchPrivate instance.
00148  *
00149  * At the moment, the following methods for file watching
00150  * are supported:
00151  * - Polling: All files to be watched are polled regularly
00152  *   using stat (more precise: QFileInfo.lastModified()).
00153  *   The polling frequency is determined from global kconfig
00154  *   settings, defaulting to 500 ms for local directories
00155  *   and 5000 ms for remote mounts
00156  * - FAM (File Alternation Monitor): first used on IRIX, SGI
00157  *   has ported this method to LINUX. It uses a kernel part
00158  *   (IMON, sending change events to /dev/imon) and a user
00159  *   level damon (fam), to which applications connect for
00160  *   notification of file changes. For NFS, the fam damon
00161  *   on the NFS server machine is used; if IMON is not built
00162  *   into the kernel, fam uses polling for local files.
00163  * - DNOTIFY: In late LINUX 2.3.x, directory notification was
00164  *   introduced. By opening a directory, you can request for
00165  *   UNIX signals to be sent to the process when a directory
00166  *   is changed.
00167  */
00168 
00169 KDirWatchPrivate::KDirWatchPrivate()
00170 {
00171   timer = new QTimer(this);
00172   connect (timer, SIGNAL(timeout()), this, SLOT(slotRescan()));
00173   freq = 3600000; // 1 hour as upper bound
00174   statEntries = 0;
00175   delayRemove = false;
00176   m_ref = 0;
00177 
00178   KConfigGroup config(KGlobal::config(), QCString("DirWatch"));
00179   m_nfsPollInterval = config.readNumEntry("NFSPollInterval", 5000);
00180   m_PollInterval = config.readNumEntry("PollInterval", 500);
00181 
00182   QString available("Stat");
00183 
00184   // used for FAM and DNOTIFY
00185   rescan_all = false;
00186   connect(&rescan_timer, SIGNAL(timeout()), this, SLOT(slotRescan()));
00187 
00188 #ifdef HAVE_FAM
00189   // It's possible that FAM server can't be started
00190   if (FAMOpen(&fc) ==0) {
00191     available += ", FAM";
00192     use_fam=true;
00193     sn = new QSocketNotifier( FAMCONNECTION_GETFD(&fc),
00194                   QSocketNotifier::Read, this);
00195     connect( sn, SIGNAL(activated(int)),
00196          this, SLOT(famEventReceived()) );
00197   }
00198   else {
00199     kdDebug(7001) << "Can't use FAM (fam daemon not running?)" << endl;
00200     use_fam=false;
00201   }
00202 #endif
00203 
00204 #ifdef HAVE_DNOTIFY
00205   supports_dnotify = true; // not guilty until proven guilty
00206   struct utsname uts;
00207   int major, minor, patch;
00208   if (uname(&uts) < 0)
00209     supports_dnotify = false; // *shrug*
00210   else if (sscanf(uts.release, "%d.%d.%d", &major, &minor, &patch) != 3)
00211     supports_dnotify = false; // *shrug*
00212   else if( major * 1000000 + minor * 1000 + patch < 2004019 ) { // <2.4.19
00213     kdDebug(7001) << "Can't use DNotify, Linux kernel too old" << endl;
00214     supports_dnotify = false;
00215   }
00216 
00217   if( supports_dnotify ) {
00218     available += ", DNotify";
00219 
00220     pipe(mPipe);
00221     fcntl(mPipe[0], F_SETFD, FD_CLOEXEC);
00222     fcntl(mPipe[1], F_SETFD, FD_CLOEXEC);
00223     mSn = new QSocketNotifier( mPipe[0], QSocketNotifier::Read, this);
00224     connect(mSn, SIGNAL(activated(int)), this, SLOT(slotActivated()));
00225     // Install the signal handler only once
00226     if ( dnotify_signal == 0 )
00227     {
00228        dnotify_signal = SIGRTMIN + 8;
00229 
00230        struct sigaction act;
00231        act.sa_sigaction = KDirWatchPrivate::dnotify_handler;
00232        sigemptyset(&act.sa_mask);
00233        act.sa_flags = SA_SIGINFO;
00234 #ifdef SA_RESTART
00235        act.sa_flags |= SA_RESTART;
00236 #endif
00237        sigaction(dnotify_signal, &act, NULL);
00238 
00239        act.sa_sigaction = KDirWatchPrivate::dnotify_sigio_handler;
00240        sigaction(SIGIO, &act, &old_sigio_act);
00241     }
00242   }
00243   else
00244   {
00245     mPipe[0] = -1;
00246     mPipe[1] = -1;
00247   }
00248 #endif
00249 
00250   kdDebug(7001) << "Available methods: " << available << endl;
00251 }
00252 
00253 /* This should never be called, but doesn't harm */
00254 KDirWatchPrivate::~KDirWatchPrivate()
00255 {
00256   timer->stop();
00257 
00258   /* remove all entries being watched */
00259   removeEntries(0);
00260 
00261 #ifdef HAVE_FAM
00262   if (use_fam) {
00263     FAMClose(&fc);
00264     kdDebug(7001) << "KDirWatch deleted (FAM closed)" << endl;
00265   }
00266 #endif
00267 #ifdef HAVE_DNOTIFY
00268   close(mPipe[0]);
00269   close(mPipe[1]);
00270 #endif
00271 }
00272 
00273 void KDirWatchPrivate::slotActivated()
00274 {
00275 #ifdef HAVE_DNOTIFY
00276    char dummy_buf[100];
00277    read(mPipe[0], &dummy_buf, 100);
00278 
00279    if (!rescan_timer.isActive())
00280       rescan_timer.start(m_PollInterval, true);
00281 #endif
00282 }
00283 
00284 /* In DNOTIFY/FAM mode, only entries which are marked dirty are scanned.
00285  * We first need to mark all yet nonexistent, but possible created
00286  * entries as dirty...
00287  */
00288 void KDirWatchPrivate::Entry::propagate_dirty()
00289 {
00290   Entry* sub_entry;
00291   for(sub_entry = m_entries.first(); sub_entry; sub_entry = m_entries.next())
00292   {
00293      if (!sub_entry->dirty)
00294      {
00295         sub_entry->dirty = true;
00296         sub_entry->propagate_dirty();
00297      }
00298   }
00299 }
00300 
00301 
00302 /* A KDirWatch instance is interested in getting events for
00303  * this file/Dir entry.
00304  */
00305 void KDirWatchPrivate::Entry::addClient(KDirWatch* instance)
00306 {
00307   Client* client = m_clients.first();
00308   for(;client; client = m_clients.next())
00309     if (client->instance == instance) break;
00310 
00311   if (client) {
00312     client->count++;
00313     return;
00314   }
00315 
00316   client = new Client;
00317   client->instance = instance;
00318   client->count = 1;
00319   client->watchingStopped = instance->isStopped();
00320   client->pending = NoChange;
00321 
00322   m_clients.append(client);
00323 }
00324 
00325 void KDirWatchPrivate::Entry::removeClient(KDirWatch* instance)
00326 {
00327   Client* client = m_clients.first();
00328   for(;client; client = m_clients.next())
00329     if (client->instance == instance) break;
00330 
00331   if (client) {
00332     client->count--;
00333     if (client->count == 0) {
00334       m_clients.removeRef(client);
00335       delete client;
00336     }
00337   }
00338 }
00339 
00340 /* get number of clients */
00341 int KDirWatchPrivate::Entry::clients()
00342 {
00343   int clients = 0;
00344   Client* client = m_clients.first();
00345   for(;client; client = m_clients.next())
00346     clients += client->count;
00347 
00348   return clients;
00349 }
00350 
00351 
00352 KDirWatchPrivate::Entry* KDirWatchPrivate::entry(const QString& _path)
00353 {
00354 // we only support absolute paths
00355   if (_path.left(1) != "/") {
00356     return 0;
00357   }
00358 
00359   QString path = _path;
00360 
00361   if ( path.length() > 1 && path.right(1) == "/" )
00362     path.truncate( path.length() - 1 );
00363 
00364   EntryMap::Iterator it = m_mapEntries.find( path );
00365   if ( it == m_mapEntries.end() )
00366     return 0;
00367   else
00368     return &(*it);
00369 }
00370 
00371 // set polling frequency for a entry and adjust global freq if needed
00372 void KDirWatchPrivate::useFreq(Entry* e, int newFreq)
00373 {
00374   e->freq = newFreq;
00375 
00376   // a reasonable frequency for the global polling timer
00377   if (e->freq < freq) {
00378     freq = e->freq;
00379     if (timer->isActive()) timer->changeInterval(freq);
00380     kdDebug(7001) << "Global Poll Freq is now " << freq << " msec" << endl;
00381   }
00382 }
00383 
00384 
00385 #if defined(HAVE_FAM)
00386 // setup FAM notification, returns false if not possible
00387 bool KDirWatchPrivate::useFAM(Entry* e)
00388 {
00389   if (!use_fam) return false;
00390 
00391   e->m_mode = FAMMode;
00392   e->dirty = false;
00393 
00394   if (e->isDir) {
00395     if (e->m_status == NonExistent) {
00396       // If the directory does not exist we watch the parent directory
00397       addEntry(0, QDir::cleanDirPath(e->path+"/.."), e, true);
00398     }
00399     else {
00400       int res =FAMMonitorDirectory(&fc, QFile::encodeName(e->path),
00401                    &(e->fr), e);
00402       if (res<0) {
00403     e->m_mode = UnknownMode;
00404     use_fam=false;
00405     return false;
00406       }
00407       kdDebug(7001) << " Setup FAM (Req "
00408             << FAMREQUEST_GETREQNUM(&(e->fr))
00409             << ") for " << e->path << endl;
00410     }
00411   }
00412   else {
00413     if (e->m_status == NonExistent) {
00414       // If the file does not exist we watch the directory
00415       addEntry(0, QFileInfo(e->path).dirPath(true), e, true);
00416     }
00417     else {
00418       int res = FAMMonitorFile(&fc, QFile::encodeName(e->path),
00419                    &(e->fr), e);
00420       if (res<0) {
00421     e->m_mode = UnknownMode;
00422     use_fam=false;
00423     return false;
00424       }
00425 
00426       kdDebug(7001) << " Setup FAM (Req "
00427             << FAMREQUEST_GETREQNUM(&(e->fr))
00428             << ") for " << e->path << endl;
00429     }
00430   }
00431 
00432   // handle FAM events to avoid deadlock
00433   // (FAM sends back all files in a directory when monitoring)
00434   famEventReceived();
00435 
00436   return true;
00437 }
00438 #endif
00439 
00440 
00441 #ifdef HAVE_DNOTIFY
00442 // setup DNotify notification, returns false if not possible
00443 bool KDirWatchPrivate::useDNotify(Entry* e)
00444 {
00445   e->dn_fd = 0;
00446   if (!supports_dnotify) return false;
00447 
00448   e->m_mode = DNotifyMode;
00449 
00450   if (e->isDir) {
00451     e->dirty = false;
00452     if (e->m_status == Normal) {
00453       int fd = open(QFile::encodeName(e->path).data(), O_RDONLY);
00454       // Migrate fd to somewhere above 128. Some libraries have
00455       // constructs like:
00456       //    fd = socket(...)
00457       //    if (fd > ARBITRARY_LIMIT)
00458       //       return error;
00459       //
00460       // Since programs might end up using a lot of KDirWatch objects
00461       // for a rather long time the above braindamage could get
00462       // triggered.
00463       //
00464       // By moving the kdirwatch fd's to > 128, calls like socket() will keep
00465       // returning fd's < ARBITRARY_LIMIT for a bit longer.
00466       int fd2 = fcntl(fd, F_DUPFD, 128);
00467       if (fd2 >= 0)
00468       {
00469         close(fd);
00470         fd = fd2;
00471       }
00472       if (fd<0) {
00473     e->m_mode = UnknownMode;
00474     return false;
00475       }
00476 
00477       int mask = DN_DELETE|DN_CREATE|DN_RENAME|DN_MULTISHOT;
00478       // if dependant is a file watch, we check for MODIFY & ATTRIB too
00479       for(Entry* dep=e->m_entries.first();dep;dep=e->m_entries.next())
00480     if (!dep->isDir) { mask |= DN_MODIFY|DN_ATTRIB; break; }
00481 
00482       if(fcntl(fd, F_SETSIG, dnotify_signal) < 0 ||
00483      fcntl(fd, F_NOTIFY, mask) < 0) {
00484 
00485     kdDebug(7001) << "Not using Linux Directory Notifications."
00486               << endl;
00487     supports_dnotify = false;
00488     ::close(fd);
00489     e->m_mode = UnknownMode;
00490     return false;
00491       }
00492 
00493       fd_Entry.replace(fd, e);
00494       e->dn_fd = fd;
00495 
00496       kdDebug(7001) << " Setup DNotify (fd " << fd
00497             << ") for " << e->path << endl;
00498     }
00499     else { // NotExisting
00500       addEntry(0, QDir::cleanDirPath(e->path+"/.."), e, true);
00501     }
00502   }
00503   else { // File
00504     // we always watch the directory (DNOTIFY can't watch files alone)
00505     // this notifies us about changes of files therein
00506     addEntry(0, QFileInfo(e->path).dirPath(true), e, true);
00507   }
00508 
00509   return true;
00510 }
00511 #endif
00512 
00513 
00514 bool KDirWatchPrivate::useStat(Entry* e)
00515 {
00516   if (KIO::probably_slow_mounted(e->path))
00517     useFreq(e, m_nfsPollInterval);
00518   else
00519     useFreq(e, m_PollInterval);
00520 
00521   if (e->m_mode != StatMode) {
00522     e->m_mode = StatMode;
00523     statEntries++;
00524 
00525     if ( statEntries == 1 ) {
00526       // if this was first STAT entry (=timer was stopped)
00527       timer->start(freq);      // then start the timer
00528       kdDebug(7001) << " Started Polling Timer, freq " << freq << endl;
00529     }
00530   }
00531 
00532   kdDebug(7001) << " Setup Stat (freq " << e->freq
00533         << ") for " << e->path << endl;
00534 
00535   return true;
00536 }
00537 
00538 
00539 /* If <instance> !=0, this KDirWatch instance wants to watch at <_path>,
00540  * providing in <isDir> the type of the entry to be watched.
00541  * Sometimes, entries are dependant on each other: if <sub_entry> !=0,
00542  * this entry needs another entry to watch himself (when notExistent).
00543  */
00544 void KDirWatchPrivate::addEntry(KDirWatch* instance, const QString& _path,
00545                 Entry* sub_entry, bool isDir)
00546 {
00547   QString path = _path;
00548   if (path.startsWith("/dev/") || (path == "/dev"))
00549     return; // Don't even go there.
00550 
00551   if ( path.length() > 1 && path.right(1) == "/" )
00552     path.truncate( path.length() - 1 );
00553 
00554   EntryMap::Iterator it = m_mapEntries.find( path );
00555   if ( it != m_mapEntries.end() )
00556   {
00557     if (sub_entry) {
00558        (*it).m_entries.append(sub_entry);
00559        kdDebug(7001) << "Added already watched Entry " << path
00560              << " (for " << sub_entry->path << ")" << endl;
00561 #ifdef HAVE_DNOTIFY
00562        Entry* e = &(*it);
00563        if( e->dn_fd > 0 ) {
00564          int mask = DN_DELETE|DN_CREATE|DN_RENAME|DN_MULTISHOT;
00565          // if dependant is a file watch, we check for MODIFY & ATTRIB too
00566          for(Entry* dep=e->m_entries.first();dep;dep=e->m_entries.next())
00567            if (!dep->isDir) { mask |= DN_MODIFY|DN_ATTRIB; break; }
00568      if( fcntl(e->dn_fd, F_NOTIFY, mask) < 0) { // shouldn't happen
00569        ::close(e->dn_fd);
00570        e->m_mode = UnknownMode;
00571        fd_Entry.remove(e->dn_fd);
00572            e->dn_fd = 0;
00573            useStat( e );
00574          }
00575        }
00576 #endif
00577     }
00578     else {
00579        (*it).addClient(instance);
00580        kdDebug(7001) << "Added already watched Entry " << path
00581              << " (now " <<  (*it).clients() << " clients)"
00582              << QString(" [%1]").arg(instance->name()) << endl;
00583     }
00584     return;
00585   }
00586 
00587   // we have a new path to watch
00588 
00589   struct stat stat_buf;
00590   QCString tpath = QFile::encodeName(path);
00591   bool exists = (stat(tpath, &stat_buf) == 0);
00592 
00593   Entry newEntry;
00594   m_mapEntries.insert( path, newEntry );
00595   // the insert does a copy, so we have to use <e> now
00596   Entry* e = &(m_mapEntries[path]);
00597 
00598   if (exists) {
00599     e->isDir = S_ISDIR(stat_buf.st_mode);
00600 
00601     if (e->isDir && !isDir)
00602       qWarning("KDirWatch: %s is a directory. Use addDir!", path.ascii());
00603     else if (!e->isDir && isDir)
00604       qWarning("KDirWatch: %s is a file. Use addFile!", path.ascii());
00605 
00606     e->m_ctime = stat_buf.st_ctime;
00607     e->m_status = Normal;
00608     e->m_nlink = stat_buf.st_nlink;
00609   }
00610   else {
00611     e->isDir = isDir;
00612     e->m_ctime = invalid_ctime;
00613     e->m_status = NonExistent;
00614     e->m_nlink = 0;
00615   }
00616 
00617   e->path = path;
00618   if (sub_entry)
00619      e->m_entries.append(sub_entry);
00620   else
00621     e->addClient(instance);
00622 
00623   kdDebug(7001) << "Added " << (e->isDir ? "Dir ":"File ") << path
00624         << (e->m_status == NonExistent ? " NotExisting" : "")
00625         << (sub_entry ? QString(" for %1").arg(sub_entry->path) : QString(""))
00626         << (instance ? QString(" [%1]").arg(instance->name()) : QString(""))
00627         << endl;
00628 
00629 
00630   // now setup the notification method
00631   e->m_mode = UnknownMode;
00632   e->msecLeft = 0;
00633 
00634   if ( isNoisyFile( tpath ) )
00635     return;
00636 
00637 #if defined(HAVE_FAM)
00638   if (useFAM(e)) return;
00639 #endif
00640 
00641 #ifdef HAVE_DNOTIFY
00642   if (useDNotify(e)) return;
00643 #endif
00644 
00645   useStat(e);
00646 }
00647 
00648 
00649 void KDirWatchPrivate::removeEntry( KDirWatch* instance,
00650                     const QString& _path, Entry* sub_entry )
00651 {
00652   Entry* e = entry(_path);
00653   if (!e) {
00654     kdWarning(7001) << "KDirWatch::removeDir can't handle '" << _path << "'" << endl;
00655     return;
00656   }
00657 
00658   if (sub_entry)
00659     e->m_entries.removeRef(sub_entry);
00660   else
00661     e->removeClient(instance);
00662 
00663   if (e->m_clients.count() || e->m_entries.count())
00664     return;
00665 
00666   if (delayRemove) {
00667     // removeList is allowed to contain any entry at most once
00668     if (removeList.findRef(e)==-1)
00669     removeList.append(e);
00670     // now e->isValid() is false
00671     return;
00672   }
00673 
00674 #ifdef HAVE_FAM
00675   if (e->m_mode == FAMMode) {
00676     if ( e->m_status == Normal) {
00677       FAMCancelMonitor(&fc, &(e->fr) );
00678       kdDebug(7001) << "Cancelled FAM (Req "
00679             << FAMREQUEST_GETREQNUM(&(e->fr))
00680             << ") for " << e->path << endl;
00681     }
00682     else {
00683       if (e->isDir)
00684     removeEntry(0, QDir::cleanDirPath(e->path+"/.."), e);
00685       else
00686     removeEntry(0, QFileInfo(e->path).dirPath(true), e);
00687     }
00688   }
00689 #endif
00690 
00691 #ifdef HAVE_DNOTIFY
00692   if (e->m_mode == DNotifyMode) {
00693     if (!e->isDir) {
00694       removeEntry(0, QFileInfo(e->path).dirPath(true), e);
00695     }
00696     else { // isDir
00697       // must close the FD.
00698       if ( e->m_status == Normal) {
00699     if (e->dn_fd) {
00700       ::close(e->dn_fd);
00701       fd_Entry.remove(e->dn_fd);
00702 
00703       kdDebug(7001) << "Cancelled DNotify (fd " << e->dn_fd
00704             << ") for " << e->path << endl;
00705       e->dn_fd = 0;
00706 
00707     }
00708       }
00709       else {
00710     removeEntry(0, QDir::cleanDirPath(e->path+"/.."), e);
00711       }
00712     }
00713   }
00714 #endif
00715 
00716   if (e->m_mode == StatMode) {
00717     statEntries--;
00718     if ( statEntries == 0 ) {
00719       timer->stop(); // stop timer if lists are empty
00720       kdDebug(7001) << " Stopped Polling Timer" << endl;
00721     }
00722   }
00723 
00724   kdDebug(7001) << "Removed " << (e->isDir ? "Dir ":"File ") << e->path
00725         << (sub_entry ? QString(" for %1").arg(sub_entry->path) : QString(""))
00726         << (instance ? QString(" [%1]").arg(instance->name()) : QString(""))
00727         << endl;
00728   m_mapEntries.remove( e->path ); // <e> not valid any more
00729 }
00730 
00731 
00732 /* Called from KDirWatch destructor:
00733  * remove <instance> as client from all entries
00734  */
00735 void KDirWatchPrivate::removeEntries( KDirWatch* instance )
00736 {
00737   QPtrList<Entry> list;
00738   int minfreq = 3600000;
00739 
00740   // put all entries where instance is a client in list
00741   EntryMap::Iterator it = m_mapEntries.begin();
00742   for( ; it != m_mapEntries.end(); ++it ) {
00743     Client* c = (*it).m_clients.first();
00744     for(;c;c=(*it).m_clients.next())
00745       if (c->instance == instance) break;
00746     if (c) {
00747       c->count = 1; // forces deletion of instance as client
00748       list.append(&(*it));
00749     }
00750     else if ( (*it).m_mode == StatMode && (*it).freq < minfreq )
00751       minfreq = (*it).freq;
00752   }
00753 
00754   for(Entry* e=list.first();e;e=list.next())
00755     removeEntry(instance, e->path, 0);
00756 
00757   if (minfreq > freq) {
00758     // we can decrease the global polling frequency
00759     freq = minfreq;
00760     if (timer->isActive()) timer->changeInterval(freq);
00761     kdDebug(7001) << "Poll Freq now " << freq << " msec" << endl;
00762   }
00763 }
00764 
00765 // instance ==0: stop scanning for all instances
00766 bool KDirWatchPrivate::stopEntryScan( KDirWatch* instance, Entry* e)
00767 {
00768   int stillWatching = 0;
00769   Client* c = e->m_clients.first();
00770   for(;c;c=e->m_clients.next()) {
00771     if (!instance || instance == c->instance)
00772       c->watchingStopped = true;
00773     else if (!c->watchingStopped)
00774       stillWatching += c->count;
00775   }
00776 
00777   kdDebug(7001) << instance->name() << " stopped scanning " << e->path
00778         << " (now " << stillWatching << " watchers)" << endl;
00779 
00780   if (stillWatching == 0) {
00781     // if nobody is interested, we don't watch
00782     e->m_ctime = invalid_ctime; // invalid
00783     //    e->m_status = Normal;
00784   }
00785   return true;
00786 }
00787 
00788 // instance ==0: start scanning for all instances
00789 bool KDirWatchPrivate::restartEntryScan( KDirWatch* instance, Entry* e,
00790                      bool notify)
00791 {
00792   int wasWatching = 0, newWatching = 0;
00793   Client* c = e->m_clients.first();
00794   for(;c;c=e->m_clients.next()) {
00795     if (!c->watchingStopped)
00796       wasWatching += c->count;
00797     else if (!instance || instance == c->instance) {
00798       c->watchingStopped = false;
00799       newWatching += c->count;
00800     }
00801   }
00802   if (newWatching == 0)
00803     return false;
00804 
00805   kdDebug(7001) << instance->name() << " restarted scanning " << e->path
00806         << " (now " << wasWatching+newWatching << " watchers)" << endl;
00807 
00808   // restart watching and emit pending events
00809 
00810   int ev = NoChange;
00811   if (wasWatching == 0) {
00812     if (!notify) {
00813       struct stat stat_buf;
00814       bool exists = (stat(QFile::encodeName(e->path), &stat_buf) == 0);
00815       if (exists) {
00816     e->m_ctime = stat_buf.st_ctime;
00817     e->m_status = Normal;
00818         e->m_nlink = stat_buf.st_nlink;
00819       }
00820       else {
00821     e->m_ctime = invalid_ctime;
00822     e->m_status = NonExistent;
00823         e->m_nlink = 0;
00824       }
00825     }
00826     e->msecLeft = 0;
00827     ev = scanEntry(e);
00828   }
00829   emitEvent(e,ev);
00830 
00831   return true;
00832 }
00833 
00834 // instance ==0: stop scanning for all instances
00835 void KDirWatchPrivate::stopScan(KDirWatch* instance)
00836 {
00837   EntryMap::Iterator it = m_mapEntries.begin();
00838   for( ; it != m_mapEntries.end(); ++it )
00839     stopEntryScan(instance, &(*it));
00840 }
00841 
00842 
00843 void KDirWatchPrivate::startScan(KDirWatch* instance,
00844                  bool notify, bool skippedToo )
00845 {
00846   if (!notify)
00847     resetList(instance,skippedToo);
00848 
00849   EntryMap::Iterator it = m_mapEntries.begin();
00850   for( ; it != m_mapEntries.end(); ++it )
00851     restartEntryScan(instance, &(*it), notify);
00852 
00853   // timer should still be running when in polling mode
00854 }
00855 
00856 
00857 // clear all pending events, also from stopped
00858 void KDirWatchPrivate::resetList( KDirWatch* /*instance*/,
00859                   bool skippedToo )
00860 {
00861   EntryMap::Iterator it = m_mapEntries.begin();
00862   for( ; it != m_mapEntries.end(); ++it ) {
00863 
00864     Client* c = (*it).m_clients.first();
00865     for(;c;c=(*it).m_clients.next())
00866       if (!c->watchingStopped || skippedToo)
00867     c->pending = NoChange;
00868   }
00869 }
00870 
00871 // Return event happened on <e>
00872 //
00873 int KDirWatchPrivate::scanEntry(Entry* e)
00874 {
00875 #ifdef HAVE_FAM
00876   if (e->m_mode == FAMMode) {
00877     // we know nothing has changed, no need to stat
00878     if(!e->dirty) return NoChange;
00879     e->dirty = false;
00880   }
00881 #endif
00882 
00883   // Shouldn't happen: Ignore "unknown" notification method
00884   if (e->m_mode == UnknownMode) return NoChange;
00885 
00886 #ifdef HAVE_DNOTIFY
00887   if (e->m_mode == DNotifyMode) {
00888     // we know nothing has changed, no need to stat
00889     if(!e->dirty) return NoChange;
00890     e->dirty = false;
00891   }
00892 #endif
00893 
00894   if (e->m_mode == StatMode) {
00895     // only scan if timeout on entry timer happens;
00896     // e.g. when using 500msec global timer, a entry
00897     // with freq=5000 is only watched every 10th time
00898 
00899     e->msecLeft -= freq;
00900     if (e->msecLeft>0) return NoChange;
00901     e->msecLeft += e->freq;
00902   }
00903 
00904   struct stat stat_buf;
00905   bool exists = (stat(QFile::encodeName(e->path), &stat_buf) == 0);
00906   if (exists) {
00907 
00908     if (e->m_status == NonExistent) {
00909       e->m_ctime = stat_buf.st_ctime;
00910       e->m_status = Normal;
00911       e->m_nlink = stat_buf.st_nlink;
00912       return Created;
00913     }
00914 
00915     if ( (e->m_ctime != invalid_ctime) &&
00916      ((stat_buf.st_ctime != e->m_ctime) ||
00917       (stat_buf.st_nlink != (nlink_t) e->m_nlink)) ) {
00918       e->m_ctime = stat_buf.st_ctime;
00919       e->m_nlink = stat_buf.st_nlink;
00920       return Changed;
00921     }
00922 
00923     return NoChange;
00924   }
00925 
00926   // dir/file doesn't exist
00927 
00928   if (e->m_ctime == invalid_ctime)
00929     return NoChange;
00930 
00931   e->m_ctime = invalid_ctime;
00932   e->m_nlink = 0;
00933   e->m_status = NonExistent;
00934 
00935   return Deleted;
00936 }
00937 
00938 /* Notify all interested KDirWatch instances about a given event on an entry
00939  * and stored pending events. When watching is stopped, the event is
00940  * added to the pending events.
00941  */
00942 void KDirWatchPrivate::emitEvent(Entry* e, int event, const QString &fileName)
00943 {
00944   QString path = e->path;
00945   if (!fileName.isEmpty()) {
00946     if (fileName[0] == '/')
00947       path = fileName;
00948     else
00949       path += "/" + fileName;
00950   }
00951 
00952   Client* c = e->m_clients.first();
00953   for(;c;c=e->m_clients.next()) {
00954     if (c->instance==0 || c->count==0) continue;
00955 
00956     if (c->watchingStopped) {
00957       // add event to pending...
00958       if (event == Changed)
00959     c->pending |= event;
00960       else if (event == Created || event == Deleted)
00961     c->pending = event;
00962       continue;
00963     }
00964     // not stopped
00965     if (event == NoChange || event == Changed)
00966       event |= c->pending;
00967     c->pending = NoChange;
00968     if (event == NoChange) continue;
00969 
00970     if (event & Deleted) {
00971       c->instance->setDeleted(path);
00972       // emit only Deleted event...
00973       continue;
00974     }
00975 
00976     if (event & Created) {
00977       c->instance->setCreated(path);
00978       // possible emit Change event after creation
00979     }
00980 
00981     if (event & Changed)
00982       c->instance->setDirty(path);
00983   }
00984 }
00985 
00986 // Remove entries which were marked to be removed
00987 void KDirWatchPrivate::slotRemoveDelayed()
00988 {
00989   Entry* e;
00990   delayRemove = false;
00991   for(e=removeList.first();e;e=removeList.next())
00992     removeEntry(0, e->path, 0);
00993   removeList.clear();
00994 }
00995 
00996 /* Scan all entries to be watched for changes. This is done regularly
00997  * when polling and once after a DNOTIFY signal. This is NOT used by FAM.
00998  */
00999 void KDirWatchPrivate::slotRescan()
01000 {
01001   EntryMap::Iterator it;
01002 
01003   // People can do very long things in the slot connected to dirty(),
01004   // like showing a message box. We don't want to keep polling during
01005   // that time, otherwise the value of 'delayRemove' will be reset.
01006   bool timerRunning = timer->isActive();
01007   if ( timerRunning )
01008     timer->stop();
01009 
01010   // We delay deletions of entries this way.
01011   // removeDir(), when called in slotDirty(), can cause a crash otherwise
01012   delayRemove = true;
01013 
01014 #ifdef HAVE_DNOTIFY
01015   QPtrList<Entry> dList, cList;
01016 #endif
01017 
01018   if (rescan_all)
01019   {
01020     // mark all as dirty
01021     it = m_mapEntries.begin();
01022     for( ; it != m_mapEntries.end(); ++it )
01023       (*it).dirty = true;
01024     rescan_all = false;
01025   }
01026   else
01027   {
01028     // progate dirty flag to dependant entries (e.g. file watches)
01029     it = m_mapEntries.begin();
01030     for( ; it != m_mapEntries.end(); ++it )
01031       if ( ((*it).m_mode == DNotifyMode) && (*it).dirty )
01032         (*it).propagate_dirty();
01033   }
01034 
01035   it = m_mapEntries.begin();
01036   for( ; it != m_mapEntries.end(); ++it ) {
01037     // we don't check invalid entries (i.e. remove delayed)
01038     if (!(*it).isValid()) continue;
01039 
01040     int ev = scanEntry( &(*it) );
01041 
01042 #ifdef HAVE_DNOTIFY
01043     if ((*it).m_mode == DNotifyMode) {
01044       if ((*it).isDir && (ev == Deleted)) {
01045     dList.append( &(*it) );
01046 
01047     // must close the FD.
01048     if ((*it).dn_fd) {
01049       ::close((*it).dn_fd);
01050       fd_Entry.remove((*it).dn_fd);
01051       (*it).dn_fd = 0;
01052     }
01053       }
01054 
01055       else if ((*it).isDir && (ev == Created)) {
01056     // For created, but yet without DNOTIFYing ...
01057     if ( (*it).dn_fd == 0) {
01058       cList.append( &(*it) );
01059       if (! useDNotify( &(*it) )) {
01060         // if DNotify setup fails...
01061         useStat( &(*it) );
01062       }
01063     }
01064       }
01065     }
01066 #endif
01067 
01068     if ( ev != NoChange )
01069       emitEvent( &(*it), ev);
01070   }
01071 
01072 
01073 #ifdef HAVE_DNOTIFY
01074   // Scan parent of deleted directories for new creation
01075   Entry* e;
01076   for(e=dList.first();e;e=dList.next())
01077     addEntry(0, QDir::cleanDirPath( e->path+"/.."), e, true);
01078 
01079   // Remove watch of parent of new created directories
01080   for(e=cList.first();e;e=cList.next())
01081     removeEntry(0, QDir::cleanDirPath( e->path+"/.."), e);
01082 #endif
01083 
01084   if ( timerRunning )
01085     timer->start(freq);
01086 
01087   QTimer::singleShot(0, this, SLOT(slotRemoveDelayed()));
01088 }
01089 
01090 bool KDirWatchPrivate::isNoisyFile( const char * filename )
01091 {
01092   // $HOME/.X.err grows with debug output, so don't notify change
01093   if ( *filename == '.') {
01094     if (strncmp(filename, ".X.err", 6) == 0) return true;
01095     if (strncmp(filename, ".xsession-errors", 16) == 0) return true;
01096     // fontconfig updates the cache on every KDE app start
01097     // (inclusive kio_thumbnail slaves)
01098     if (strncmp(filename, ".fonts.cache", 12) == 0) return true;
01099   }
01100 
01101   return false;
01102 }
01103 
01104 #ifdef HAVE_FAM
01105 void KDirWatchPrivate::famEventReceived()
01106 {
01107   static FAMEvent fe;
01108 
01109   delayRemove = true;
01110 
01111   while(use_fam && FAMPending(&fc)) {
01112     if (FAMNextEvent(&fc, &fe) == -1) {
01113       kdWarning(7001) << "FAM connection problem, switching to polling."
01114               << endl;
01115       use_fam = false;
01116       delete sn; sn = 0;
01117 
01118       // Replace all FAMMode entries with DNotify/Stat
01119       EntryMap::Iterator it;
01120       it = m_mapEntries.begin();
01121       for( ; it != m_mapEntries.end(); ++it )
01122     if ((*it).m_mode == FAMMode && (*it).m_clients.count()>0) {
01123 #ifdef HAVE_DNOTIFY
01124       if (useDNotify( &(*it) )) continue;
01125 #endif
01126       useStat( &(*it) );
01127     }
01128     }
01129     else
01130       checkFAMEvent(&fe);
01131   }
01132 
01133   QTimer::singleShot(0, this, SLOT(slotRemoveDelayed()));
01134 }
01135 
01136 void KDirWatchPrivate::checkFAMEvent(FAMEvent* fe)
01137 {
01138   // Don't be too verbose ;-)
01139   if ((fe->code == FAMExists) ||
01140       (fe->code == FAMEndExist) ||
01141       (fe->code == FAMAcknowledge)) return;
01142 
01143   if ( isNoisyFile( fe->filename ) )
01144     return;
01145 
01146   Entry* e = 0;
01147   EntryMap::Iterator it = m_mapEntries.begin();
01148   for( ; it != m_mapEntries.end(); ++it )
01149     if (FAMREQUEST_GETREQNUM(&( (*it).fr )) ==
01150        FAMREQUEST_GETREQNUM(&(fe->fr)) ) {
01151       e = &(*it);
01152       break;
01153     }
01154 
01155   // Entry* e = static_cast<Entry*>(fe->userdata);
01156 
01157   kdDebug(7001) << "Processing FAM event ("
01158         << ((fe->code == FAMChanged) ? "FAMChanged" :
01159             (fe->code == FAMDeleted) ? "FAMDeleted" :
01160             (fe->code == FAMStartExecuting) ? "FAMStartExecuting" :
01161             (fe->code == FAMStopExecuting) ? "FAMStopExecuting" :
01162             (fe->code == FAMCreated) ? "FAMCreated" :
01163             (fe->code == FAMMoved) ? "FAMMoved" :
01164             (fe->code == FAMAcknowledge) ? "FAMAcknowledge" :
01165             (fe->code == FAMExists) ? "FAMExists" :
01166             (fe->code == FAMEndExist) ? "FAMEndExist" : "Unknown Code")
01167         << ", " << fe->filename
01168         << ", Req " << FAMREQUEST_GETREQNUM(&(fe->fr))
01169         << ")" << endl;
01170 
01171   if (!e) {
01172     // this happens e.g. for FAMAcknowledge after deleting a dir...
01173     //    kdDebug(7001) << "No entry for FAM event ?!" << endl;
01174     return;
01175   }
01176 
01177   if (e->m_status == NonExistent) {
01178     kdDebug(7001) << "FAM event for nonExistent entry " << e->path << endl;
01179     return;
01180   }
01181 
01182   // Delayed handling. This rechecks changes with own stat calls.
01183   e->dirty = true;
01184   if (!rescan_timer.isActive())
01185     rescan_timer.start(m_PollInterval, true);
01186 
01187   // needed FAM control actions on FAM events
01188   if (e->isDir)
01189     switch (fe->code)
01190     {
01191       case FAMDeleted:
01192        // file absolute: watched dir
01193         if (fe->filename[0] == '/')
01194         {
01195           // a watched directory was deleted
01196 
01197           e->m_status = NonExistent;
01198           FAMCancelMonitor(&fc, &(e->fr) ); // needed ?
01199           kdDebug(7001) << "Cancelled FAMReq "
01200                         << FAMREQUEST_GETREQNUM(&(e->fr))
01201                         << " for " << e->path << endl;
01202           // Scan parent for a new creation
01203           addEntry(0, QDir::cleanDirPath( e->path+"/.."), e, true);
01204         }
01205         break;
01206 
01207       case FAMCreated: {
01208           // check for creation of a directory we have to watch
01209           Entry *sub_entry = e->m_entries.first();
01210           for(;sub_entry; sub_entry = e->m_entries.next())
01211             if (sub_entry->path == e->path + "/" + fe->filename) break;
01212           if (sub_entry && sub_entry->isDir) {
01213             QString path = e->path;
01214             removeEntry(0,e->path,sub_entry); // <e> can be invalid here!!
01215             sub_entry->m_status = Normal;
01216             if (!useFAM(sub_entry))
01217               useStat(sub_entry);
01218           }
01219           break;
01220         }
01221 
01222       default:
01223         break;
01224     }
01225 }
01226 #else
01227 void KDirWatchPrivate::famEventReceived() {}
01228 #endif
01229 
01230 
01231 void KDirWatchPrivate::statistics()
01232 {
01233   EntryMap::Iterator it;
01234 
01235   kdDebug(7001) << "Entries watched:" << endl;
01236   if (m_mapEntries.count()==0) {
01237     kdDebug(7001) << "  None." << endl;
01238   }
01239   else {
01240     it = m_mapEntries.begin();
01241     for( ; it != m_mapEntries.end(); ++it ) {
01242       Entry* e = &(*it);
01243       kdDebug(7001) << "  " << e->path << " ("
01244             << ((e->m_status==Normal)?"":"Nonexistent ")
01245             << (e->isDir ? "Dir":"File") << ", using "
01246             << ((e->m_mode == FAMMode) ? "FAM" :
01247             (e->m_mode == DNotifyMode) ? "DNotify" :
01248             (e->m_mode == StatMode) ? "Stat" : "Unknown Method")
01249             << ")" << endl;
01250 
01251       Client* c = e->m_clients.first();
01252       for(;c; c = e->m_clients.next()) {
01253     QString pending;
01254     if (c->watchingStopped) {
01255       if (c->pending & Deleted) pending += "deleted ";
01256       if (c->pending & Created) pending += "created ";
01257       if (c->pending & Changed) pending += "changed ";
01258       if (!pending.isEmpty()) pending = " (pending: " + pending + ")";
01259       pending = ", stopped" + pending;
01260     }
01261     kdDebug(7001) << "    by " << c->instance->name()
01262               << " (" << c->count << " times)"
01263               << pending << endl;
01264       }
01265       if (e->m_entries.count()>0) {
01266     kdDebug(7001) << "    dependent entries:" << endl;
01267     Entry* d = e->m_entries.first();
01268     for(;d; d = e->m_entries.next()) {
01269       kdDebug(7001) << "      " << d->path << endl;
01270     }
01271       }
01272     }
01273   }
01274 }
01275 
01276 
01277 //
01278 // Class KDirWatch
01279 //
01280 
01281 static KStaticDeleter<KDirWatch> sd_dw;
01282 KDirWatch* KDirWatch::s_pSelf = 0L;
01283 
01284 KDirWatch* KDirWatch::self()
01285 {
01286   if ( !s_pSelf ) {
01287     sd_dw.setObject( s_pSelf, new KDirWatch );
01288   }
01289 
01290   return s_pSelf;
01291 }
01292 
01293 bool KDirWatch::exists()
01294 {
01295   return s_pSelf != 0;
01296 }
01297 
01298 KDirWatch::KDirWatch (QObject* parent, const char* name)
01299   : QObject(parent,name)
01300 {
01301   if (!name) {
01302     static int nameCounter = 0;
01303 
01304     nameCounter++;
01305     setName(QString("KDirWatch-%1").arg(nameCounter).ascii());
01306   }
01307 
01308   if (!dwp_self)
01309     dwp_self = new KDirWatchPrivate;
01310   d = dwp_self;
01311   d->ref();
01312 
01313   _isStopped = false;
01314 }
01315 
01316 KDirWatch::~KDirWatch()
01317 {
01318   if (d) d->removeEntries(this);
01319   if ( d->deref() )
01320   {
01321     // delete it if it's the last one
01322     delete d;
01323     dwp_self = 0L;
01324   }
01325 }
01326 
01327 
01328 // TODO: add watchFiles/recursive support
01329 void KDirWatch::addDir( const QString& _path,
01330             bool watchFiles, bool recursive)
01331 {
01332   if (watchFiles || recursive) {
01333     kdDebug(7001) << "addDir - recursive/watchFiles not supported in KDE 3.0"
01334           << endl;
01335   }
01336   if (d) d->addEntry(this, _path, 0, true);
01337 }
01338 
01339 void KDirWatch::addFile( const QString& _path )
01340 {
01341   if (d) d->addEntry(this, _path, 0, false);
01342 }
01343 
01344 QDateTime KDirWatch::ctime( const QString &_path )
01345 {
01346   KDirWatchPrivate::Entry* e = d->entry(_path);
01347 
01348   if (!e)
01349     return QDateTime();
01350 
01351   QDateTime result;
01352   result.setTime_t(e->m_ctime);
01353   return result;
01354 }
01355 
01356 void KDirWatch::removeDir( const QString& _path )
01357 {
01358   if (d) d->removeEntry(this, _path, 0);
01359 }
01360 
01361 void KDirWatch::removeFile( const QString& _path )
01362 {
01363   if (d) d->removeEntry(this, _path, 0);
01364 }
01365 
01366 bool KDirWatch::stopDirScan( const QString& _path )
01367 {
01368   if (d) {
01369     KDirWatchPrivate::Entry *e = d->entry(_path);
01370     if (e && e->isDir) return d->stopEntryScan(this, e);
01371   }
01372   return false;
01373 }
01374 
01375 bool KDirWatch::restartDirScan( const QString& _path )
01376 {
01377   if (d) {
01378     KDirWatchPrivate::Entry *e = d->entry(_path);
01379     if (e && e->isDir)
01380       // restart without notifying pending events
01381       return d->restartEntryScan(this, e, false);
01382   }
01383   return false;
01384 }
01385 
01386 void KDirWatch::stopScan()
01387 {
01388   if (d) d->stopScan(this);
01389   _isStopped = true;
01390 }
01391 
01392 void KDirWatch::startScan( bool notify, bool skippedToo )
01393 {
01394   _isStopped = false;
01395   if (d) d->startScan(this, notify, skippedToo);
01396 }
01397 
01398 
01399 bool KDirWatch::contains( const QString& _path ) const
01400 {
01401   KDirWatchPrivate::Entry* e = d->entry(_path);
01402   if (!e)
01403      return false;
01404 
01405   KDirWatchPrivate::Client* c = e->m_clients.first();
01406   for(;c;c=e->m_clients.next())
01407     if (c->instance == this) return true;
01408 
01409   return false;
01410 }
01411 
01412 void KDirWatch::statistics()
01413 {
01414   if (!dwp_self) {
01415     kdDebug(7001) << "KDirWatch not used" << endl;
01416     return;
01417   }
01418   dwp_self->statistics();
01419 }
01420 
01421 
01422 void KDirWatch::setCreated( const QString & _file )
01423 {
01424   kdDebug(7001) << name() << " emitting created " << _file << endl;
01425   emit created( _file );
01426 }
01427 
01428 void KDirWatch::setDirty( const QString & _file )
01429 {
01430   kdDebug(7001) << name() << " emitting dirty " << _file << endl;
01431   emit dirty( _file );
01432 }
01433 
01434 void KDirWatch::setDeleted( const QString & _file )
01435 {
01436   kdDebug(7001) << name() << " emitting deleted " << _file << endl;
01437   emit deleted( _file );
01438 }
01439 
01440 KDirWatch::Method KDirWatch::internalMethod()
01441 {
01442 #ifdef HAVE_FAM
01443   if (d->use_fam)
01444      return KDirWatch::FAM;
01445 #endif
01446 #ifdef HAVE_DNOTIFY
01447   if (d->supports_dnotify)
01448      return KDirWatch::DNotify;
01449 #endif
01450   return KDirWatch::Stat;
01451 }
01452 
01453 
01454 #include "kdirwatch.moc"
01455 #include "kdirwatch_p.moc"
01456 
01457 //sven
01458 
01459 // vim: sw=2 ts=8 et
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