diff --git a/ChangeLog b/ChangeLog
index 7d5e2dd8..add87326 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2005-12-28 Bart Hakvoort <hakvoort@cvs.gnome.org>
+
+	* replaced popen() with Glib::spawn_command_line_sync() + general
+	  cleanups in the set_used_sectors() functions.
+
 2005-12-25 Bart Hakvoort <hakvoort@cvs.gnome.org>
 
 	* merry christmas
diff --git a/include/FileSystem.h b/include/FileSystem.h
index d8dd31eb..183dbddb 100644
--- a/include/FileSystem.h
+++ b/include/FileSystem.h
@@ -51,8 +51,10 @@ public:
 protected:
 	int Execute_Command( Glib::ustring command ) ;
 
+	//those are used in several Set_Used_Sectors()..
+	std::vector<std::string> argv, envp ;
 	std::string output ;
-	Sector free_blocks, blocksize ;
+	Sector N, S ;
 	unsigned int index ;
 	
 private:
diff --git a/include/VBox_VisualDisk.h b/include/VBox_VisualDisk.h
index 30d98ea7..af4ad7bd 100644
--- a/include/VBox_VisualDisk.h
+++ b/include/VBox_VisualDisk.h
@@ -34,7 +34,7 @@ public:
 	VBox_VisualDisk();
 	~VBox_VisualDisk();
 	
-	void load_partitions( const std::vector<Partition> & partitions, const Sector device_length );
+	void load_partitions( const std::vector<Partition> & partitions, Sector device_length );
 	void set_selected( const Partition & partition ) ;
 	void clear() ;
 
@@ -108,6 +108,7 @@ private:
 			selected = false ;
 
 			pango_layout .clear() ;
+			logicals .clear() ;
 		}
 
 		~visual_partition()
diff --git a/src/VBox_VisualDisk.cc b/src/VBox_VisualDisk.cc
index 33a198ec..2f56ecb9 100644
--- a/src/VBox_VisualDisk.cc
+++ b/src/VBox_VisualDisk.cc
@@ -59,7 +59,7 @@ VBox_VisualDisk::VBox_VisualDisk()
 	this ->pack_start( hbox_legend );
 }
 	
-void VBox_VisualDisk::load_partitions( const std::vector<Partition> & partitions, const Sector device_length )
+void VBox_VisualDisk::load_partitions( const std::vector<Partition> & partitions, Sector device_length )
 {
 	clear() ;	
 
@@ -452,7 +452,7 @@ void VBox_VisualDisk::free_colors( std::vector<visual_partition> & visual_partit
 {
 	for ( unsigned int t = 0 ; t < visual_partitions .size() ; t++ )
 	{
-		this ->get_colormap( ) ->free_color( visual_partitions[ t ] .color ) ;
+		this ->get_colormap() ->free_color( visual_partitions[ t ] .color ) ;
 
 		if ( visual_partitions[ t ] .logicals .size() > 0 )
 			free_colors( visual_partitions[ t ] .logicals ) ;
@@ -464,9 +464,9 @@ VBox_VisualDisk::~VBox_VisualDisk()
 	clear() ;
 
 	//free the allocated colors
-	this ->get_colormap( ) ->free_colors( color_used, 1 ) ;
-	this ->get_colormap( ) ->free_colors( color_unused, 1 ) ;
-	this ->get_colormap( ) ->free_colors( color_text, 1 ) ;
+	this ->get_colormap() ->free_colors( color_used, 1 ) ;
+	this ->get_colormap() ->free_colors( color_unused, 1 ) ;
+	this ->get_colormap() ->free_colors( color_text, 1 ) ;
 }
 
 } //GParted
diff --git a/src/ext2.cc b/src/ext2.cc
index 541aa591..30a04f61 100644
--- a/src/ext2.cc
+++ b/src/ext2.cc
@@ -52,9 +52,15 @@ FS ext2::get_filesystem_support( )
 
 void ext2::Set_Used_Sectors( Partition & partition ) 
 {
+	argv .push_back( "dumpe2fs" ) ;
+	argv .push_back( "-h" ) ;
+	argv .push_back( partition .partition ) ;
+
+	envp .push_back( "LC_ALL=C" ) ;
+	
 	try
 	{
-		Glib::spawn_command_line_sync("dumpe2fs -h " + partition .partition, &output ) ;
+		Glib::spawn_sync( ".", argv, envp, Glib::SPAWN_SEARCH_PATH, sigc::slot< void >(), &output ) ;
 	}
 	catch ( Glib::Exception & e )
 	{ 
@@ -63,25 +69,15 @@ void ext2::Set_Used_Sectors( Partition & partition )
 	} 
 
 	index = output .find( "Free blocks:" ) ;
-	if ( index < output .length() )
-	{
-		output = output.substr( index );
-		free_blocks = atol( output .substr( 13, output .find( "\n" ) - 13 ) .c_str() ) ;
-	}
-	else
-		free_blocks = -1 ;
+	if ( index >= output .length() || sscanf( output.substr( index ) .c_str(), "Free blocks: %Ld", &N ) != 1 )   
+		N = -1 ;
 	
 	index = output .find( "Block size:" ) ;
-	if ( index < output.length() )
-	{
-		output = output.substr( index );
-		blocksize = atol( output .substr( 12, output .find( "\n" ) - 12 ) .c_str() ) ;
-	}
-	else
-		blocksize = -1 ;
+	if ( index >= output.length() || sscanf( output.substr( index ) .c_str(), "Block size: %Ld", &S ) != 1 )  
+		S = -1 ;
 
-	if ( free_blocks > -1 && blocksize > -1 )
-		partition .Set_Unused( free_blocks * blocksize / 512 ) ;
+	if ( N > -1 && S > -1 )
+		partition .Set_Unused( N * S / 512 ) ;
 }
 
 bool ext2::Create( const Partition & new_partition )
diff --git a/src/ext3.cc b/src/ext3.cc
index 8f53ef3e..e626cda9 100644
--- a/src/ext3.cc
+++ b/src/ext3.cc
@@ -52,9 +52,15 @@ FS ext3::get_filesystem_support( )
 
 void ext3::Set_Used_Sectors( Partition & partition ) 
 {
+	argv .push_back( "dumpe2fs" ) ;
+	argv .push_back( "-h" ) ;
+	argv .push_back( partition .partition ) ;
+
+	envp .push_back( "LC_ALL=C" ) ;
+	
 	try
 	{
-		Glib::spawn_command_line_sync("dumpe2fs -h " + partition .partition, &output ) ;
+		Glib::spawn_sync( ".", argv, envp, Glib::SPAWN_SEARCH_PATH, sigc::slot< void >(), &output ) ;
 	}
 	catch ( Glib::Exception & e )
 	{ 
@@ -63,25 +69,15 @@ void ext3::Set_Used_Sectors( Partition & partition )
 	} 
 
 	index = output .find( "Free blocks:" ) ;
-	if ( index < output .length() )
-	{
-		output = output.substr( index );
-		free_blocks = atol( output .substr( 13, output .find( "\n" ) - 13 ) .c_str() ) ;
-	}
-	else
-		free_blocks = -1 ;
+	if ( index >= output .length() || sscanf( output.substr( index ) .c_str(), "Free blocks: %Ld", &N ) != 1 )   
+		N = -1 ;
 	
 	index = output .find( "Block size:" ) ;
-	if ( index < output.length() )
-	{
-		output = output.substr( index );
-		blocksize = atol( output .substr( 12, output .find( "\n" ) - 12 ) .c_str() ) ;
-	}
-	else
-		blocksize = -1 ;
-
-	if ( free_blocks > -1 && blocksize > -1 )
-		partition .Set_Unused( free_blocks * blocksize / 512 ) ;
+	if ( index >= output.length() || sscanf( output.substr( index ) .c_str(), "Block size: %Ld", &S ) != 1 )  
+		S = -1 ;
+	
+	if ( N > -1 && S > -1 )
+		partition .Set_Unused( N * S / 512 ) ;
 }
 	
 bool ext3::Create( const Partition & new_partition )
diff --git a/src/fat16.cc b/src/fat16.cc
index db06d436..df26b8c5 100644
--- a/src/fat16.cc
+++ b/src/fat16.cc
@@ -53,33 +53,36 @@ FS fat16::get_filesystem_support( )
 
 void fat16::Set_Used_Sectors( Partition & partition ) 
 {
-	char c_buf[ 512 ] ;
-	FILE *f ;
-	
-	Glib::ustring output ;
-	Sector free_clusters = -1, bytes_per_cluster = -1 ;
+	argv .push_back( "dosfsck" ) ;
+	argv .push_back( "-v" ) ;
+	argv .push_back( partition .partition ) ;
 
-        //get free blocks..
-	f = popen( ( "LC_ALL=C dosfsck -v " + partition .partition ) .c_str( ), "r" ) ;
-	while ( fgets( c_buf, 512, f ) )
-	{
-		output = Glib::locale_to_utf8( c_buf ) ;
-		
-		//bytes per cluster
-		if ( output .find( "bytes per cluster" ) < output .length( ) )
-			bytes_per_cluster = atol( output .substr( 0, output .find( "b" ) ) .c_str( )  ) ;
-		
-		//free clusters
-		if ( output .find( partition .partition ) < output .length( ) )
-		{
-			output = output .substr( output .find( "," ) +2, output .length( ) ) ;
-			free_clusters = atol( output .substr( output .find( "/" ) +1, output .find( " " ) ) .c_str( ) ) - atol( output .substr( 0, output .find( "/" ) ) .c_str( ) ) ;
-		}
-	}
-	pclose( f ) ;
+	envp .push_back( "LC_ALL=C" ) ;
 	
-	if ( free_clusters > -1 && bytes_per_cluster > -1 )
-		partition .Set_Unused( free_clusters * bytes_per_cluster / 512 ) ;
+	try
+	{
+		Glib::spawn_sync( ".", argv, envp, Glib::SPAWN_SEARCH_PATH, sigc::slot< void >(), &output ) ;
+	}
+	catch ( Glib::Exception & e )
+	{ 
+		std::cout << e .what() << std::endl ;
+		return ;
+	} 
+
+	//free clusters
+	index = output .find( ",", output .find( partition .partition ) + partition .partition .length() ) +1 ;
+	if ( index < output .length() && sscanf( output .substr( index ) .c_str(), "%Ld/%Ld", &S, &N ) == 2 ) 
+		N -= S ;
+	else
+		N = -1 ;
+
+	//bytes per cluster
+	index = output .rfind( "\n", output .find( "bytes per cluster" ) ) +1 ;
+	if ( index >= output .length() || sscanf( output .substr( index ) .c_str(), "%Ld", &S ) != 1 )
+		S = -1 ;
+
+	if ( N > -1 && S > -1 )
+		partition .Set_Unused( N * S / 512 ) ;
 }
 	
 bool fat16::Create( const Partition & new_partition )
diff --git a/src/fat32.cc b/src/fat32.cc
index d463180d..459f1437 100644
--- a/src/fat32.cc
+++ b/src/fat32.cc
@@ -52,33 +52,36 @@ FS fat32::get_filesystem_support( )
 
 void fat32::Set_Used_Sectors( Partition & partition ) 
 {
-	char c_buf[ 512 ] ;
-	FILE *f ;
-	
-	Glib::ustring output ;
-	Sector free_clusters = -1, bytes_per_cluster = -1 ;
+	argv .push_back( "dosfsck" ) ;
+	argv .push_back( "-v" ) ;
+	argv .push_back( partition .partition ) ;
 
-        //get free blocks..
-	f = popen( ( "LC_ALL=C dosfsck -v " + partition .partition ) .c_str( ), "r" ) ;
-	while ( fgets( c_buf, 512, f ) )
-	{
-		output = Glib::locale_to_utf8( c_buf ) ;
-		
-		//bytes per cluster
-		if ( output .find( "bytes per cluster" ) < output .length( ) )
-			bytes_per_cluster = atol( output .substr( 0, output .find( "b" ) ) .c_str( )  ) ;
-		
-		//free clusters
-		if ( output .find( partition .partition ) < output .length( ) )
-		{
-			output = output .substr( output .find( "," ) +2, output .length( ) ) ;
-			free_clusters = atol( output .substr( output .find( "/" ) +1, output .find( " " ) ) .c_str( ) ) - atol( output .substr( 0, output .find( "/" ) ) .c_str( ) ) ;
-		}
-	}
-	pclose( f ) ;
+	envp .push_back( "LC_ALL=C" ) ;
 	
-	if ( free_clusters > -1 && bytes_per_cluster > -1 )
-		partition .Set_Unused( free_clusters * bytes_per_cluster / 512 ) ;
+	try
+	{
+		Glib::spawn_sync( ".", argv, envp, Glib::SPAWN_SEARCH_PATH, sigc::slot< void >(), &output ) ;
+	}
+	catch ( Glib::Exception & e )
+	{ 
+		std::cout << e .what() << std::endl ;
+		return ;
+	} 
+
+	//free clusters
+	index = output .find( ",", output .find( partition .partition ) + partition .partition .length() ) +1 ;
+	if ( index < output .length() && sscanf( output .substr( index ) .c_str(), "%Ld / %Ld", &S, &N ) == 2 ) 
+		N -= S ;
+	else
+		N = -1 ;
+
+	//bytes per cluster
+	index = output .rfind( "\n", output .find( "bytes per cluster" ) ) +1 ;
+	if ( index >= output .length() || sscanf( output .substr( index ) .c_str(), "%Ld", &S ) != 1 ) 
+		S = -1 ;
+
+	if ( N > -1 && S > -1 )
+		partition .Set_Unused( N * S / 512 ) ;
 }
 
 bool fat32::Create( const Partition & new_partition )
diff --git a/src/ntfs.cc b/src/ntfs.cc
index fa3929db..2e9d67d2 100644
--- a/src/ntfs.cc
+++ b/src/ntfs.cc
@@ -53,25 +53,28 @@ FS ntfs::get_filesystem_support( )
 
 void ntfs::Set_Used_Sectors( Partition & partition ) 
 {
-	char c_buf[ 512 ] ;
-	FILE *f ;
-	
-	Glib::ustring output ;
+	argv .push_back( "ntfscluster" ) ;
+	argv .push_back( "--force" ) ;
+	argv .push_back( partition .partition ) ;
 
-        //get free sectors..
-	f = popen( ( "LC_ALL=C ntfscluster --force " + partition .partition ) .c_str( ), "r" ) ;
-	while ( fgets( c_buf, 512, f ) )
+	envp .push_back( "LC_ALL=C" ) ;
+	
+	try
 	{
-		output = Glib::locale_to_utf8( c_buf ) ;
-		
-		//free sectors
-		if ( output .find( "sectors of free space" ) < output .length( ) )
-		{
-			partition .Set_Unused( atol( (output .substr( output .find( ":" ) +1, output .length( ) ) ) .c_str( ) ) ) ;
-			break ;
-		}
+		Glib::spawn_sync( ".", argv, envp, Glib::SPAWN_SEARCH_PATH, sigc::slot< void >(), &output ) ;
 	}
-	pclose( f ) ;
+	catch ( Glib::Exception & e )
+	{ 
+		std::cout << e .what() << std::endl ;
+		return ;
+	} 
+
+	index = output .find( "sectors of free space" ) ;
+	if ( index >= output .length() || sscanf( output .substr( index ) .c_str(), "sectors of free space : %Ld", &N ) != 1 ) 
+		N = -1 ;
+
+	if ( N > -1 )
+		partition .Set_Unused( N ) ;
 }
 
 bool ntfs::Create( const Partition & new_partition )
diff --git a/src/reiser4.cc b/src/reiser4.cc
index eed097b3..887b3c68 100644
--- a/src/reiser4.cc
+++ b/src/reiser4.cc
@@ -46,30 +46,31 @@ FS reiser4::get_filesystem_support( )
 
 void reiser4::Set_Used_Sectors( Partition & partition ) 
 {
-	char c_buf[ 512 ] ;
-	FILE *f ;
-	
-	Glib::ustring output ;
-	Sector free_blocks = -1, blocksize = -1 ;
+	argv .push_back( "debugfs.reiser4" ) ;
+	argv .push_back( partition .partition ) ;
 
-        //get free blocks..
-	f = popen( ( "LC_ALL=C debugfs.reiser4 " + partition .partition ) .c_str( ), "r" ) ;
-	while ( fgets( c_buf, 512, f ) )
-	{
-		output = Glib::locale_to_utf8( c_buf ) ;
-		
-		//blocksize
-		if ( output .find( "blksize" ) < output .length( ) )
-			blocksize = atol( (output .substr( output .find( ":" ) +1, output .length( ) ) ) .c_str( ) ) ;
-		
-		//free blocks
-		if ( output .find( "free blocks" ) < output .length( ) )
-			free_blocks = atol( (output .substr( output .find( ":" ) +1, output .length( ) ) ) .c_str( ) ) ;
-	}
-	pclose( f ) ;
+	envp .push_back( "LC_ALL=C" ) ;
 	
-	if ( free_blocks > -1 && blocksize > -1 )
-		partition .Set_Unused( free_blocks * blocksize / 512 ) ;
+	try
+	{
+		Glib::spawn_sync( ".", argv, envp, Glib::SPAWN_SEARCH_PATH, sigc::slot< void >(), &output ) ;
+	}
+	catch ( Glib::Exception & e )
+	{ 
+		std::cout << e .what() << std::endl ;
+		return ;
+	} 
+
+	index = output .find( "free blocks" ) ;
+	if ( index >= output .length() || sscanf( output.substr( index ) .c_str(), "free blocks: %Ld", &N ) != 1 )   
+		N = -1 ;
+	
+	index = output .find( "blksize" ) ;
+	if ( index >= output.length() || sscanf( output.substr( index ) .c_str(), "blksize: %Ld", &S ) != 1 )  
+		S = -1 ;
+
+	if ( N > -1 && S > -1 )
+		partition .Set_Unused( N * S / 512 ) ;
 }
 
 bool reiser4::Create( const Partition & new_partition )
diff --git a/src/reiserfs.cc b/src/reiserfs.cc
index 549d45c2..7961c27f 100644
--- a/src/reiserfs.cc
+++ b/src/reiserfs.cc
@@ -56,30 +56,31 @@ FS reiserfs::get_filesystem_support( )
 
 void reiserfs::Set_Used_Sectors( Partition & partition ) 
 {
-	char c_buf[ 512 ] ;
-	FILE *f ;
-	
-	Glib::ustring output ;
-	Sector free_blocks = -1, blocksize = -1 ;
+	argv .push_back( "debugreiserfs" ) ;
+	argv .push_back( partition .partition ) ;
 
-        //get free blocks..
-	f = popen( ( "LC_ALL=C debugreiserfs " + partition .partition ) .c_str( ), "r" ) ;
-	while ( fgets( c_buf, 512, f ) )
-	{
-		output = Glib::locale_to_utf8( c_buf ) ;
-		
-		//blocksize
-		if ( output .find( "Blocksize" ) < output .length( ) )
-			blocksize = atol( (output .substr( output .find( ":" ) +1, output .length( ) ) ) .c_str( ) ) ;
-		
-		//free blocks
-		if ( output .find( "Free blocks" ) < output .length( ) )
-			free_blocks = atol( (output .substr( output .find( ":" ) +1, output .length( ) ) ) .c_str( ) ) ;
-	}
-	pclose( f ) ;
+	envp .push_back( "LC_ALL=C" ) ;
 	
-	if ( free_blocks > -1 && blocksize > -1 )
-		partition .Set_Unused( free_blocks * blocksize / 512 ) ;
+	try
+	{
+		Glib::spawn_sync( ".", argv, envp, Glib::SPAWN_SEARCH_PATH, sigc::slot< void >(), &output ) ;
+	}
+	catch ( Glib::Exception & e )
+	{ 
+		std::cout << e .what() << std::endl ;
+		return ;
+	} 
+
+	index = output .find( "Blocksize" ) ;
+	if ( index >= output .length() || sscanf( output .substr( index ) .c_str(), "Blocksize: %Ld", &S ) != 1 )
+		S = -1 ;
+
+	index = output .find( ":", output .find( "Free blocks" ) ) +1 ;
+	if ( index >= output .length() || sscanf( output .substr( index ) .c_str(), "%Ld", &N ) != 1 )
+		N = -1 ;
+
+	if ( N > -1 && S > -1 )
+		partition .Set_Unused( N * S / 512 ) ;
 }
 	
 bool reiserfs::Create( const Partition & new_partition )
diff --git a/src/xfs.cc b/src/xfs.cc
index 5b76d903..8a98872e 100644
--- a/src/xfs.cc
+++ b/src/xfs.cc
@@ -61,31 +61,37 @@ FS xfs::get_filesystem_support( )
 
 void xfs::Set_Used_Sectors( Partition & partition ) 
 {
-	char c_buf[ 512 ] ;
-	FILE *f ;
-	
-	Glib::ustring output ;
-	Sector free_blocks = -1, blocksize = -1 ;
+	argv .push_back( "xfs_db" ) ;
+	argv .push_back( "-c" ) ;
+	argv .push_back( "sb 0" ) ;
+	argv .push_back( "-c print blocksize" ) ;
+	argv .push_back( "-c print fdblocks" ) ;
+	argv .push_back( "-r" ) ;
+	argv .push_back( partition .partition ) ;
 
-        //get free blocks..
-	f = popen( ( "LC_ALL=C xfs_db -c 'sb 0' -c print -r " + partition .partition ) .c_str( ), "r" ) ;
-	while ( fgets( c_buf, 512, f ) )
-	{
-		output = Glib::locale_to_utf8( c_buf ) ;
-		
-		//free blocks
-		if ( output .find( "fdblocks" ) < output .length( ) )
-			free_blocks = atol( (output .substr( output .find( "=" ) +1, output .length( ) ) ) .c_str( ) ) ;
-			
-		//blocksize
-		if ( output .find( "blocksize" ) < output .length( ) )
-			blocksize = atol( (output .substr( output .find( "=" ) +1, output .length( ) ) ) .c_str( ) ) ;
-		
-	}
-	pclose( f ) ;
+	envp .push_back( "LC_ALL=C" ) ;
 	
-	if ( free_blocks > -1 && blocksize > -1 )
-		partition .Set_Unused( free_blocks * blocksize / 512 ) ;
+	try
+	{
+		Glib::spawn_sync( ".", argv, envp, Glib::SPAWN_SEARCH_PATH, sigc::slot< void >(), &output ) ;
+	}
+	catch ( Glib::Exception & e )
+	{ 
+		std::cout << e .what() << std::endl ;
+		return ;
+	}
+	
+	//blocksize
+	if ( sscanf( output .c_str(), "blocksize = %Ld", &S ) != 1 )
+		S = -1 ;
+
+	//free blocks
+	output = output .substr( output .find( "fdblocks" ) ) ;
+	if ( sscanf( output .c_str(), "fdblocks = %Ld", &N ) != 1 )
+		N = -1 ;
+
+	if ( N > -1 && S > -1 )
+		partition .Set_Unused( N * S / 512 ) ;
 }
 
 bool xfs::Create( const Partition & new_partition )