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-rw-r--r--libopie2/opiecore/ofilenotify.cpp98
-rw-r--r--libopie2/opiecore/ofilenotify.h4
2 files changed, 91 insertions, 11 deletions
diff --git a/libopie2/opiecore/ofilenotify.cpp b/libopie2/opiecore/ofilenotify.cpp
index bcfb1aa..de4c63b 100644
--- a/libopie2/opiecore/ofilenotify.cpp
+++ b/libopie2/opiecore/ofilenotify.cpp
@@ -31,24 +31,25 @@ 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 )
@@ -65,55 +66,87 @@ 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;
- int fd = ::open( (const char*) path, O_RDONLY );
+ // 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();
}
- int result = ::fcntl( fd, F_SETSIG, SIGRTMIN );
+
+ result = ::fcntl( fd, F_SETSIG, SIGRTMIN );
if ( result == -1 )
{
- qWarning( "OFileNotification::start(): Can't subscribe to '%s': %s.", (const char*) path, strerror( errno ) );
+ 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*) path, strerror( errno ) );
+ 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*) path, fd, type );
+ 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;
- _path = path;
_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*) path, strerror( errno ) );
+ 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 )
{
@@ -132,52 +165,98 @@ void OFileNotification::stop()
OFileNotificationType OFileNotification::type() const
{
return _type;
}
QString OFileNotification::path() const
{
return _path;
}
+
int OFileNotification::fileno() const
{
return _fd;
}
-void OFileNotification::activate()
+
+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 );
+
+ 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 );
+ 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;
+ }
+
+ 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 )
{
- fn->activate();
+ // 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
}
@@ -200,22 +279,21 @@ bool OFileNotification::registerSignalHandler()
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 )
- 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 3bc141d..5315896 100644
--- a/libopie2/opiecore/ofilenotify.h
+++ b/libopie2/opiecore/ofilenotify.h
@@ -66,30 +66,32 @@ class OFileNotification : public QObject
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:
- void activate();
+ bool activate();
+ 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;
};
}
}
#endif