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-rw-r--r--libopie2/opiecore/ofilenotify.cpp15
-rw-r--r--libopie2/opiecore/ofilenotify.h10
2 files changed, 23 insertions, 2 deletions
diff --git a/libopie2/opiecore/ofilenotify.cpp b/libopie2/opiecore/ofilenotify.cpp
index de4c63b..270570e 100644
--- a/libopie2/opiecore/ofilenotify.cpp
+++ b/libopie2/opiecore/ofilenotify.cpp
@@ -11,289 +11,302 @@ _;:,     .>    :=|. This program is free software; you can
   ._= =}       : or (at your option) any later version.
  .%`+i>       _;_.
  .i_,=:_.      -<s. This program is distributed in the hope that
   +  .  -:.       = it will be useful, but WITHOUT ANY WARRANTY;
  : ..    .:,     . . . without even the implied warranty of
  =_        +     =;=|` MERCHANTABILITY or FITNESS FOR A
_.=:.       :    :=>`: 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 <qobject.h>
#include <qsignal.h>
#include <qintdict.h>
#include <qdir.h>
/* STD */
#include <sys/types.h>
#include <sys/stat.h>
#include <assert.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
static QIntDict<OFileNotification> notification_list;
namespace Opie {
namespace Core {
OFileNotification::OFileNotification( QObject* parent, const char* name )
:QObject( parent, name ), _active( false )
{
qDebug( "OFileNotification::OFileNotification()" );
}
OFileNotification::~OFileNotification()
{
qDebug( "OFileNotification::~OFileNotification()" );
}
bool OFileNotification::isActive() const
{
return _active;
}
int OFileNotification::start( const QString& path, bool sshot, OFileNotificationType type )
{
_path = QString::null;
_fd = 0;
if ( _active ) stop();
QString dirpath;
// check if path exists and whether it is a file or a directory, if it exists at all
int result = ::stat( (const char*) path, &_stat );
if ( result == -1 )
{
qWarning( "OFileNotification::start(): Can't stat '%s': %s.", (const char*) path, strerror( errno ) );
return -1;
}
// if it is not a directory, we need to find out in which directory the file is
bool isDirectory = S_ISDIR( _stat.st_mode );
if ( !isDirectory )
{
int slashpos;
slashpos = path.findRev( '/' );
if ( slashpos > 0 )
{
_path = path;
dirpath = path.left( slashpos );
}
}
else /* isDirectory */
{
qWarning( "FIXME FIXME FIXME = Directory Notification Not Yet Implemented!" );
_path = path;
dirpath = path;
assert( 0 );
}
int fd = ::open( (const char*) dirpath, O_RDONLY );
if ( fd != -1 )
{
if ( notification_list.isEmpty() )
{
OFileNotification::registerSignalHandler();
}
result = ::fcntl( fd, F_SETSIG, SIGRTMIN );
if ( result == -1 )
{
qWarning( "OFileNotification::start(): Can't subscribe to '%s': %s.", (const char*) dirpath, strerror( errno ) );
return -1;
}
if ( !sshot ) (int) type |= (int) Multi;
result = ::fcntl( fd, F_NOTIFY, type );
if ( result == -1 )
{
qWarning( "OFileNotification::start(): Can't subscribe to '%s': %s.", (const char*) dirpath, strerror( errno ) );
return -1;
}
qDebug( "OFileNotification::start(): Subscribed for changes to %s (fd = %d, mask = 0x%0x)", (const char*) dirpath, fd, type );
notification_list.insert( fd, this );
_type = type;
_fd = fd;
_active = true;
::memset( &_stat, 0, sizeof _stat );
::stat( _path, &_stat );
return fd;
}
else
{
qWarning( "OFileNotification::start(): Error with path '%s': %s.", (const char*) dirpath, strerror( errno ) );
return -1;
}
}
void OFileNotification::stop()
{
if ( !_active ) return;
int result = ::fcntl( _fd, F_NOTIFY, 0 );
if ( result == -1 )
{
qWarning( "OFileNotification::stop(): Can't remove subscription to '%s': %s.", (const char*) _path, strerror( errno ) );
}
else
{
::close( _fd );
_type = Single;
_path = QString::null;
_fd = 0;
_active = false;
}
}
OFileNotificationType OFileNotification::type() const
{
return _type;
}
QString OFileNotification::path() const
{
return _path;
}
int OFileNotification::fileno() const
{
return _fd;
}
bool OFileNotification::activate()
{
if ( hasChanged() )
{
emit triggered();
_signal.activate();
return true;
}
else
return false;
}
bool OFileNotification::hasChanged()
{
bool c = false;
struct stat newstat;
::memset( &newstat, 0, sizeof newstat );
- ::stat( _path, &newstat );
+ int result = ::stat( _path, &newstat ); // may fail if file has been renamed or deleted. that doesn't matter :)
+ qDebug( "result of newstat call is %d (%s=%d)", result, strerror( errno ), errno );
qDebug( "stat.atime = %0lx, newstat.atime = %0lx", (long)_stat.st_atime, (long)newstat.st_atime );
qDebug( "stat.mtime = %0lx, newstat.mtime = %0lx", (long)_stat.st_mtime, (long)newstat.st_mtime );
+ qDebug( "stat.ctime = %0lx, newstat.ctime = %0lx", (long)_stat.st_ctime, (long)newstat.st_ctime );
+
+ if ( !c && (_type & (Delete|Rename)) && (long)newstat.st_atime == 0 && (long)newstat.st_mtime == 0 && (long)newstat.st_ctime == 0)
+ {
+ qDebug( "OFileNotification::hasChanged(): file has been deleted or renamed" );
+ c = true;
+ }
if ( !c && (_type & Access) && (long)_stat.st_atime < (long)newstat.st_atime )
{
qDebug( "OFileNotification::hasChanged(): atime changed" );
c = true;
}
if ( !c && (_type & Modify) && (long)_stat.st_mtime < (long)newstat.st_mtime )
{
qDebug( "OFileNotification::hasChanged(): mtime changed" );
c = true;
}
+ if ( !c && (_type & Attrib) && (long)_stat.st_ctime < (long)newstat.st_ctime )
+ {
+ qDebug( "OFileNotification::hasChanged(): ctime changed" );
+ c = true;
+ }
return c;
}
void OFileNotification::singleShot( const QString& path, QObject* receiver, const char* member, OFileNotificationType type )
{
OFileNotification* ofn = new OFileNotification();
ofn->_signal.connect( receiver, member );
ofn->start( path, true, type );
}
void OFileNotification::__signalHandler( int sig, siginfo_t *si, void *data )
{
qWarning( "OFileNotification::__signalHandler(): reached." );
int fd = si->si_fd;
OFileNotification* fn = notification_list[fd];
if ( fn )
{
// check if it really was the file (dnotify triggers on directory granularity, not file granularity)
if ( !fn->activate() )
{
qDebug( "OFileNotification::__signalHandler(): false alarm ;) Restarting the trigger (if it was single)..." );
if ( !(fn->type() & Multi ) )
{
int result = ::fcntl( fn->fileno(), F_NOTIFY, fn->type() );
if ( result == -1 )
{
qWarning( "OFileNotification::__signalHandler(): Can't restart the trigger: %s.", strerror( errno ) );
}
}
return;
}
#if 1
if ( !(fn->type() & Multi) )
{
qDebug( "OFileNotification::__signalHandler(): '%d' was singleShot. Removing from list.", fd );
notification_list.remove( fd );
if ( notification_list.isEmpty() )
{
OFileNotification::unregisterSignalHandler();
}
}
#endif
}
else
{
qWarning( "OFileNotification::__signalHandler(): D'oh! Called without fd in notification_list. Race condition?" );
}
}
bool OFileNotification::registerSignalHandler()
{
struct sigaction act;
act.sa_sigaction = OFileNotification::__signalHandler;
::sigemptyset( &act.sa_mask );
act.sa_flags = SA_SIGINFO;
if ( ::sigaction( SIGRTMIN, &act, NULL ) == -1 )
{
qWarning( "OFileNotification::registerSignalHandler(): couldn't register signal handler: %s", strerror( errno ) );
return false;
}
qDebug( "OFileNotification::registerSignalHandler(): done" );
}
void OFileNotification::unregisterSignalHandler()
{
struct sigaction act;
act.sa_sigaction = ( void (*)(int, siginfo_t*, void*) ) SIG_DFL;
::sigemptyset( &act.sa_mask );
if ( ::sigaction( SIGRTMIN, &act, NULL ) == -1 )
{
qWarning( "OFileNotification::unregisterSignalHandler(): couldn't deregister signal handler: %s", strerror( errno ) );
}
qDebug( "OFileNotification::unregisterSignalHandler(): done" );
}
}
}
diff --git a/libopie2/opiecore/ofilenotify.h b/libopie2/opiecore/ofilenotify.h
index 5315896..13b5a6b 100644
--- a/libopie2/opiecore/ofilenotify.h
+++ b/libopie2/opiecore/ofilenotify.h
@@ -1,97 +1,105 @@
/*
                This file is part of the Opie Project
=. Copyright (C) 2004 Michael 'Mickey' Lauer <mickey@Vanille.de>
.=l. Copyright (C) The Opie Team <opie-devel@handhelds.org>
         .>+-=
_;:,     .>    :=|. 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; either version 2 of the License,
   ._= =}       : or (at your option) any later version.
  .%`+i>       _;_.
  .i_,=:_.      -<s. This program is distributed in the hope that
   +  .  -:.       = it will be useful, but WITHOUT ANY WARRANTY;
  : ..    .:,     . . . without even the implied warranty of
  =_        +     =;=|` MERCHANTABILITY or FITNESS FOR A
_.=:.       :    :=>`: 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.
*/
#ifndef OFILENOTIFY_H
#define OFILENOTIFY_H
#if defined (__GNUC__) && (__GNUC__ < 3)
#define _GNU_SOURCE
#endif
/* QT */
#include <qobject.h>
#include <qsignal.h>
#include <qstring.h>
/* STD */
#include <signal.h>
#include <fcntl.h>
namespace Opie {
namespace Core {
enum OFileNotificationType { Single = 0x0000000,
Multi = DN_MULTISHOT,
Access = DN_ACCESS,
Modify = DN_MODIFY,
Create = DN_CREATE,
Delete = DN_DELETE,
Rename = DN_RENAME,
Attrib = DN_ATTRIB };
class OFileNotification : public QObject
{
Q_OBJECT
public:
OFileNotification( QObject* parent = 0, const char* name = 0 );
~OFileNotification();
static void singleShot( const QString& path, QObject* receiver, const char* member, OFileNotificationType type = Modify );
int start( const QString& path, bool sshot = false, OFileNotificationType type = Modify );
void stop();
OFileNotificationType type() const;
QString path() const;
int fileno() const;
bool isActive() const;
signals:
void triggered();
protected:
bool activate();
- bool hasChanged();
+ virtual bool hasChanged();
static bool registerSignalHandler();
static void unregisterSignalHandler();
static void __signalHandler( int sig, siginfo_t *si, void *data );
private:
QString _path;
OFileNotificationType _type;
QSignal _signal;
int _fd;
bool _active;
struct stat _stat;
};
+
+class ODirectoryNotification : public OFileNotification
+{
+ public:
+ virtual bool hasChanged() { return true; };
+};
+
+
}
}
#endif