[gparted] Correctly report usage of absolutely full NTFS (#697946)

[Curtis Gedak <gedakc src gnome org>]

commit 50ca2e5f135da759748e7298cc1ad40160441597
Author: Mike Fleetwood <mike fleetwood googlemail com>
Date:   Sat Apr 13 12:34:06 2013 +0100

    Correctly report usage of absolutely full NTFS (#697946)
    
    For an absolutely full NTFS GParted doesn't show the file system usage
    but instead shows a warning against the partition.
    
    GParted was looking only for "resize at %d" to determine file system
    used figure in the output from the ntfsresize command.  Also handle
    finding "ERROR: Volume is full" too to derive used figure.
    
    NTFS with 1 block free case:
        # ntfsresize --info --force --no-progress-bar /dev/sda9
        ...
        Current volume size: 1073738240 bytes (1074 MB)
        ...
        Collecting resizing constraints ...
        You might resize at 1073737728 bytes (freeing 4096 bytes).
        ...
        # echo $?
        0
    
    Absolutely full NTFS case:
        # ntfsresize --info --force --no-progress-bar /dev/sda9
        ...
        Current volume size: 1073738240 bytes (1074 MB)
        ...
        Collecting resizing constraints ...
        ERROR: Volume is full. To shrink it, delete unused files.
        # echo $?
        1
    
    Closes Bug #697946 - Absolutely full NTFS reported as partition error

 src/ntfs.cc | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)
---
diff --git a/src/ntfs.cc b/src/ntfs.cc
index 033eaf7..3a160af 100644
--- a/src/ntfs.cc
+++ b/src/ntfs.cc
@@ -110,8 +110,9 @@ FS ntfs::get_filesystem_support()
 
 void ntfs::set_used_sectors( Partition & partition ) 
 {
-       if ( ! Utils::execute_command( 
-               "ntfsresize --info --force --no-progress-bar " + partition .get_path(), output, error, true ) 
)
+       exit_status = Utils::execute_command(
+               "ntfsresize --info --force --no-progress-bar " + partition .get_path(), output, error, true ) 
;
+       if ( exit_status == 0 || exit_status == 1<<8 )
        {
                index = output .find( "Current volume size:" ) ;
                if ( index >= output .length() ||
@@ -122,6 +123,11 @@ void ntfs::set_used_sectors( Partition & partition )
                if ( index >= output .length() ||
                     sscanf( output .substr( index ) .c_str(), "resize at %Ld", &N ) != 1 )
                        N = -1 ;
+               //For an absolutely full NTFS, "ntfsresize --info" exits
+               //  with status 1 and reports this message instead
+               index = output .find( "ERROR: Volume is full" ) ;
+               if ( index < output .length() )
+                       N = T ;
 
                if ( T > -1 && N > -1 )
                {