This commit fixes bug 1840. The problem is that the palm support declared

a variable inside of a case statement. When I integrated the patch for
palm support I streamlined the switch. This lost the brackets that would
be required to declare vars inside of switch statements. The bug slipped
by because I wasn't doing arm compiles at the time. Sorry.

This patch fixes it. It also slides in some corrections associated to what
open and sscanf return. It should not cause any behavior change.

Thanks goes to GoXbox Live for reporting the problem.

1 files changed, 14 insertions, 10 deletions

diff --git a/libopie2/opiecore/device/odevice_palm.cpp b/libopie2/opiecore/device/odevice_palm.cpp
index 399c08c..d40dfce 100644
--- a/libopie2/opiecore/device/odevice_palm.cpp
+++ b/libopie2/opiecore/device/odevice_palm.cpp
@@ -138,147 +138,151 @@ void Palm::init(const QString& cpu_info)
 
 
 void Palm::initButtons()
 {
 
     if ( d->m_buttons )
         return ;
 
     if ( isQWS( ) ) {
 	addPreHandler(this);
     }
 
     d->m_buttons = new QValueList <ODeviceButton>;
 
     for ( uint i = 0; i < ( sizeof( palm_buttons ) / sizeof( palm_button ) ); i++ )
     {
 	palm_button *ib = palm_buttons + i;
         ODeviceButton b;
 
 	if (( ib->model & d->m_model ) == d->m_model ) {
 	    b. setKeycode ( ib->code );
 	    b. setUserText ( QObject::tr ( "Button", ib->utext ));
 	    b. setPixmap ( OResource::loadPixmap ( ib->pix ));
 	    b. setFactoryPresetPressedAction ( OQCopMessage ( makeChannel ( ib->fpressedservice ), ib->fpressedaction ));
 	    b. setFactoryPresetHeldAction ( OQCopMessage ( makeChannel ( ib->fheldservice ), ib->fheldaction ));
 
 	    d->m_buttons->append ( b );
 	}
     }
     reloadButtonMapping();
 }
 
 
 bool Palm::filter ( int /*unicode*/, int keycode, int modifiers, bool isPress, bool autoRepeat )
 {
     int newkeycode = keycode;
 
     if (qt_screen->transformOrientation() != Rot0){
 
         switch ( keycode ) {
 	    case Key_Left :
             case Key_Right:
             case Key_Up   :
             case Key_Down :
 		    newkeycode = Key_Left + ( keycode - Key_Left + (int) qt_screen->transformOrientation() ) % 4;
 	    default:
 		break;
         }
-    
+
         if (newkeycode!=keycode) {
             if ( newkeycode != Key_unknown ) {
                 QWSServer::sendKeyEvent ( -1, newkeycode, modifiers, isPress, autoRepeat );
             }
             return true;
         }
 
     }
-  
+
     return false;
 }
 
 
 bool Palm::suspend()
 {
     // some Palms do not implement their own power management at the moment.
 
     bool res = false;
 
     if ( !isQWS( ) ) // only qwsserver is allowed to suspend
         return false;
 
     switch ( d->m_model ) {
         case Model_Palm_LD:
         case Model_Palm_Z72:
         {
             QCopChannel::send( "QPE/System", "aboutToSuspend()" );
 
             ::sync(); // flush fs caches
             res = ( ::system ( "apm --suspend" ) == 0 );
 
             QCopChannel::send( "QPE/System", "returnFromSuspend()" );
         }
         break;
 	default:
 	break;
     }
 
     return res;
 }
 
 
 int Palm::displayBrightnessResolution() const
 {
     int res = 1;
+    int fd = -1;
 
     switch ( d->m_model )
     {
       case Model_Palm_LD:
       case Model_Palm_TX:
       case Model_Palm_Z72:
-        int fd = ::open( m_backlightdev + "max_brightness", O_RDONLY|O_NONBLOCK );
-        if ( fd )
+        fd = ::open( m_backlightdev + "max_brightness", O_RDONLY|O_NONBLOCK );
+        if ( fd != -1)
         {
           char buf[100];
-          if ( ::read( fd, &buf[0], sizeof buf ) ) ::sscanf( &buf[0], "%d", &res );
+          if ( ::read( fd, &buf[0], sizeof buf ) > 0 )
+              ::sscanf( &buf[0], "%d", &res );
           ::close( fd );
         }
 	break;
 
       default:
 	res = 1;
     }
- 
+
     return res;
 }
 
 
 bool Palm::setDisplayBrightness( int bright )
 {
     bool res = false;
 
     if ( bright > 255 ) bright = 255;
     if ( bright < 0 ) bright = 0;
 
     int numberOfSteps = displayBrightnessResolution();
     int val = ( bright == 1 ) ? 1 : ( bright * numberOfSteps ) / 255;
+    int fd = -1;
 
     switch ( d->m_model )
     {
 
       case Model_Palm_LD:
       case Model_Palm_TX:
       case Model_Palm_Z72:
-        int fd = ::open( m_backlightdev + "brightness", O_WRONLY|O_NONBLOCK );
-        if ( fd )
+        fd = ::open( m_backlightdev + "brightness", O_WRONLY|O_NONBLOCK );
+        if ( fd  != -1 )
         {
             char buf[100];
             int len = ::snprintf( &buf[0], sizeof buf, "%d", val );
             res = ( ::write( fd, &buf[0], len ) == 0 );
             ::close( fd );
         }
         break;
-      
-      default: res = false;
+
+      default:
+        res = false;
     }
     return res;
 }