/*                 This file is part of the Opie Project =. Copyright (C) 2004-2005 Michael 'Mickey' Lauer .=l. Copyright (C) The Opie Team          .>+-= _;:,     .>    :=|. This program is free software; you can .> <`_,   >  .   <= redistribute it and/or modify it under :`=1 )Y*s>-.--   : the terms of the GNU Library General Public .="- .-=="i,     .._ License as published by the Free Software - .   .-<_>     .<> Foundation; version 2 of the License.    ._= =}       :   .%`+i>       _;_.   .i_,=:_.      -`: PARTICULAR PURPOSE. See the GNU ..}^=.=       =       ; Library General Public License for more ++=   -.     .`     .: details. :     =  ...= . :.=- -.   .:....=;==+<; You should have received a copy of the GNU -_. . .   )=.  = Library General Public License along with   --        :-=` this library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "ofilenotify.h" using namespace Opie::Core; /* OPIE */ /* QT */ #include #include #include #include #include /* STD */ #include #include #include #include #include #include #include #include static QIntDict notification_list; QSocketNotifier* OFileNotification::_sn; int OFileNotification::_fd = -1; #define INOTIFY_DEVICE "/dev/inotify" namespace Opie { namespace Core { //================================================================================================= // OFile //================================================================================================= OFile::OFile() : QObject( 0, 0 ), QFile() { qDebug( "OFile()" ); } OFile::OFile( const QString& name ) : QObject( 0, 0 ), QFile( name ) { qDebug( "OFile()" ); } OFile::~OFile() { qDebug( "~OFile()" ); } void OFile::connectNotify( const char *signal ) { QString s = normalizeSignalSlot( signal+1 ); qDebug( "OFile::connectNotify() signal = '%s'", (const char*) s ); if ( s.startsWith( "accessed" ) ) QObject::connectNotify( signal ); /* void accessed( const QString& ); void modified( const QString& ); void attributed( const QString& ); void closed( const QString&, bool ); void opened( const QString& ); void deleted( const QString& ); void unmounted( const QString& ); */ } void OFile::disconnectNotify( const char* signal ) { qDebug( "OFile::disconnectNotify() signal = '%s'", signal ); QObject::disconnectNotify( signal ); } int OFile::startWatch( int mode ) { } //================================================================================================= // OFileNotificationEvent //================================================================================================= OFileNotificationEvent::OFileNotificationEvent( OFileNotification* parent, int wd, unsigned int mask, unsigned int cookie, const QString& name ) :_parent( parent ), _wd( wd ), _mask( mask ), _cookie( cookie ), _name( name ) { qDebug( "OFileNotificationEvent()" ); } OFileNotificationEvent::~OFileNotificationEvent() { qDebug( "~OFileNotificationEvent()" ); } //================================================================================================= // OFileNotification //================================================================================================= OFileNotification::OFileNotification( QObject* parent, const char* name ) :QObject( parent, name ), _active( false ), _multi( true ) { qDebug( "OFileNotification::OFileNotification()" ); } OFileNotification::~OFileNotification() { stop(); qDebug( "OFileNotification::~OFileNotification()" ); } bool OFileNotification::isActive() const { return _active; } int OFileNotification::watch( const QString& path, bool sshot, OFileNotificationType type ) { // check if path exists and is a regular file struct stat s; if ( ::stat( (const char*) path, &s ) == -1 ) { qWarning( "OFileNotification::watch(): Can't watch '%s': %s.", (const char*) path, strerror( errno ) ); return -1; } if ( !S_ISREG( s.st_mode ) ) { qWarning( "OFileNotification::watch(): Can't watch '%s': %s.", (const char*) path, "not a regular file" ); return -1; } return startWatching( path, sshot, type ); } int OFileNotification::startWatching( const QString& path, bool sshot, OFileNotificationType type ) { if ( notification_list.isEmpty() ) { OFileNotification::registerEventHandler(); } struct inotify_watch_request iwr; ::memset( &iwr, 0, sizeof iwr ); iwr.name = const_cast( (const char*) path ); iwr.mask = type; _wd = ::ioctl( OFileNotification::_fd, INOTIFY_WATCH, &iwr ); if ( _wd < 0 ) { qWarning( "OFileNotification::watch(): inotify can't watch '%s': %s.", (const char*) path, strerror( errno ) ); return -1; } notification_list.insert( _wd, this ); _path = path; _multi = !sshot; _type = type; _active = true; qDebug( "OFileNotification::watch(): watching '%s' [wd=%d].", (const char*) path, _wd ); return _wd; } void OFileNotification::stop() { notification_list.remove( _wd ); _path = QString::null; _wd = 0; _active = false; if ( notification_list.isEmpty() ) { OFileNotification::unregisterEventHandler(); } } OFileNotificationType OFileNotification::type() const { return _type; } QString OFileNotification::path() const { return _path; } bool OFileNotification::isSingleShot() const { return !_multi; } bool OFileNotification::activate( const OFileNotificationEvent* e ) { qDebug( "OFileNotification::activate(): e = ( %s, %d, 0x%08x, %d, %s )", (const char*) _path, e->descriptor(), e->mask(), e->cookie(), (const char*) e->name() ); //FIXME: Should we really deliver QueueOverflow and/or Ignore to user level code? // dumb signal _signal.activate(); // generic signal emit triggered( _path, e->mask(), e->name() ); // specialized signals switch ( e->mask() ) { case Access: emit accessed( _path ); break; case Modify: emit modified( _path ); break; case Attrib: emit attributed( _path); break; case CloseWrite: emit closed( _path, true ); break; case CloseNoWrite: emit closed( _path, false ); break; case Open: emit opened( _path ); break; case MovedFrom: emit movedFrom( _path, e->name() ); break; case MovedTo: emit movedTo( _path, e->name() ); break; case DeleteSubdir: emit deletedSubdir( _path, e->name() ); break; case DeleteFile: emit deletedFile( _path, e->name() ); break; case CreateSubdir: emit createdSubdir( _path, e->name() ); break; case CreateFile: emit createdFile( _path, e->name() ); break; case DeleteSelf: emit deleted( _path ); break; case Unmount: emit unmounted( _path ); break; case _QueueOverflow: qFatal( "OFileNotification::activate() - Inotify Event Queue Overload!" ); break; case _Ignored: qWarning( "OFileNotification::activate() - Further Events for '%s' will be ignored", (const char*) _path ); break; default: assert( 0 ); } delete e; if ( !_multi ) stop(); return true; } bool OFileNotification::singleShot( const QString& path, QObject* receiver, const char* member, OFileNotificationType type ) { OFileNotification* ofn = new OFileNotification(); ofn->_signal.connect( receiver, member ); return ofn->watch( path, true, type ) != -1; } void OFileNotification::inotifyEventHandler() { qDebug( "OFileNotification::inotifyEventHandler(): reached." ); char buffer[16384]; ssize_t buffer_i; struct inotify_event *pevent, *event; ssize_t r; size_t event_size; int count = 0; r = ::read(_fd, buffer, 16384); if ( r <= 0 ) return; buffer_i = 0; while ( buffer_i < r ) { pevent = (struct inotify_event *)&buffer[buffer_i]; event_size = sizeof(struct inotify_event) + pevent->len; OFileNotificationEvent* e = new OFileNotificationEvent( notification_list[ pevent->wd ], pevent->wd, pevent->mask, pevent->cookie, pevent->len ? pevent->name : 0 ); e->activate(); buffer_i += event_size; count++; } qDebug( "OFileNotification::inotifyEventHandler(): processed %d events", count ); } bool OFileNotification::registerEventHandler() { OFileNotification::_fd = ::open( INOTIFY_DEVICE, O_RDONLY ); if ( OFileNotification::_fd < 0 ) { qWarning( "OFileNotification::registerEventHandler(): couldn't register event handler: %s", strerror( errno ) ); return false; } OFileNotification::_sn = new QSocketNotifier( _fd, QSocketNotifier::Read ); connect( OFileNotification::_sn, SIGNAL( activated(int) ), this, SLOT( inotifyEventHandler() ) ); qDebug( "OFileNotification::registerEventHandler(): done" ); return true; } void OFileNotification::unregisterEventHandler() { if ( _sn ) delete _sn; if ( OFileNotification::_fd ) ::close( OFileNotification::_fd ); qDebug( "OFileNotification::unregisterEventHandler(): done" ); } //================================================================================================= // ODirNotification //================================================================================================= ODirNotification::ODirNotification( QObject* parent, const char* name ) :QObject( parent, name ), _topfilenotification( 0 ), _type( Nothing ), _depth( -123 ) { qDebug( "ODirNotification::ODirNotification()" ); } ODirNotification::~ODirNotification() { qDebug( "ODirNotification::~ODirNotification()" ); } /** Love-Trowbridge recursive directory scanning algorithm: Step 1. Start at initial directory foo. Add watch. Step 2. Setup handlers for watch created in Step 1. Specifically, ensure that a directory created in foo will result in a handled CREATE_SUBDIR event. Step 3. Read the contents of foo. Step 4. For each subdirectory of foo read in step 3, repeat step 1. Step 5. For any CREATE_SUBDIR event on bar, if a watch is not yet created on bar, repeat step 1 on bar. **/ int ODirNotification::watch( const QString& path, bool sshot, OFileNotificationType type, int recurse ) { if ( _type == Nothing ) _type = type; // only set it once - for the top level call OFileNotificationType subtype = ( recurse != 0 ) ? (OFileNotificationType) int( _type | CreateSubdir ) : _type; qDebug( "ODirNotification::watch( %s, %d, 0x%08x, %d )", (const char*) path, sshot, subtype, recurse ); OFileNotification* fn = new OFileNotification( this, "ODirNotification delegate" ); int result = fn->startWatching( path, sshot, subtype ); if ( result != -1 ) { if ( !_topfilenotification ) _topfilenotification = fn; // only set it once - for the top level call if ( _depth == -123 ) _depth = recurse; // only set it once - for the top level call connect( fn, SIGNAL( triggered( const QString&, unsigned int, const QString& ) ), this, SIGNAL( triggered( const QString&, unsigned int, const QString& ) ) ); connect( fn, SIGNAL( accessed( const QString& ) ), this, SIGNAL( accessed( const QString& ) ) ); connect( fn, SIGNAL( modified( const QString& ) ), this, SIGNAL( modified( const QString& ) ) ); connect( fn, SIGNAL( attributed( const QString& ) ), this, SIGNAL( attributed( const QString& ) ) ); connect( fn, SIGNAL( closed( const QString&, bool ) ), this, SIGNAL( closed( const QString&, bool ) ) ); connect( fn, SIGNAL( opened( const QString& ) ), this, SIGNAL( opened( const QString& ) ) ); connect( fn, SIGNAL( movedTo( const QString&, const QString& ) ), this, SIGNAL( movedTo( const QString&, const QString& ) ) ); connect( fn, SIGNAL( movedFrom( const QString&, const QString& ) ), this, SIGNAL( movedFrom( const QString&, const QString& ) ) ); connect( fn, SIGNAL( deletedSubdir( const QString&, const QString& ) ), this, SIGNAL( deletedSubdir( const QString&, const QString& ) ) ); connect( fn, SIGNAL( deletedFile( const QString&, const QString& ) ), this, SIGNAL( deletedFile( const QString&, const QString& ) ) );; connect( fn, SIGNAL( createdSubdir( const QString&, const QString& ) ), this, SIGNAL( createdSubdir( const QString&, const QString& ) ) ); connect( fn, SIGNAL( createdFile( const QString&, const QString& ) ), this, SIGNAL( createdFile( const QString&, const QString& ) ) ); connect( fn, SIGNAL( deleted( const QString& ) ), this, SIGNAL( deleted( const QString& ) ) ); connect( fn, SIGNAL( unmounted( const QString& ) ), this, SIGNAL( unmounted( const QString& ) ) ); if ( recurse != 0 ) { connect( fn, SIGNAL( createdSubdir( const QString&, const QString& ) ), this, SLOT( subdirCreated( const QString&, const QString& ) ) ); QDir directory( path ); QStringList subdirs = directory.entryList( QDir::Dirs ); for ( QStringList::Iterator it = subdirs.begin(); it != subdirs.end(); ++it ) { if ( (*it) == "." || (*it) == ".." ) continue; QString subpath = QString( "%1/%2" ).arg( path ).arg( *it ); int subresult = watch( subpath, sshot, subtype, recurse-1 ); if ( subresult == -1 ) { qDebug( "ODirNotification::watch(): subresult for '%s' was -1. Interrupting", (const char*) (*it) ); return -1; } } } } else return -1; } void ODirNotification::subdirCreated( const QString& dir, const QString& subdir ) { qDebug( "*** ODirNotification::subdirCreated '%s/%s'", (const char*) dir, (const char*) subdir ); QString newdir = dir; if ( newdir.startsWith( _topfilenotification->path() ) ) { newdir.replace( _topfilenotification->path(), "" ); int level = newdir.contains( '/' ); qDebug( "*** dirpart = '%s' ==> level = %d", (const char*) newdir, level ); if ( _depth == -1 || _depth > level ) { watch( QString( "%1/%2" ).arg( dir ).arg( subdir ), _topfilenotification->isSingleShot(), _topfilenotification->type(), _depth == -1 ? -1 : _depth-level-1 ); } } } } // namespace Ui } // namespace Opie