Function ntfs_get_volume_name

src/ntfs.c:332–388

}

static void ntfs_get_volume_name(disk_t *disk_car, partition_t *partition, const struct ntfs_boot_sector*ntfs_header)
{
  unsigned char *buffer;
  uint64_t mft_pos;
  unsigned int mft_record_size;
  partition->fsname[0]='\0';
  if(ntfs_header->clusters_per_mft_record>0)
    mft_record_size=ntfs_header->clusters_per_mft_record * ntfs_header->sectors_per_cluster * ntfs_sector_size(ntfs_header);
  else
    mft_record_size=1<<(-ntfs_header->clusters_per_mft_record);
  mft_pos=partition->part_offset+(uint64_t)(le16(ntfs_header->reserved)+le64(ntfs_header->mft_lcn)*ntfs_header->sectors_per_cluster)*ntfs_sector_size(ntfs_header);
  /* Record 3 = $Volume */
  mft_pos+=3*mft_record_size;
#ifdef NTFS_DEBUG
  log_info("NTFS MFT cluster = %lu\n",le64(ntfs_header->mft_lcn));
  log_info("NTFS cluster size =    %5u sectors\n",ntfs_header->sectors_per_cluster);
  log_info("NTFS MFT_record_size = %5u bytes\n",mft_record_size);
  log_info("NTFS sector size =     %5u bytes\n", ntfs_sector_size(ntfs_header));
#endif
  if(mft_record_size < 42)
  {
    log_error("Invalid MFT record size or NTFS sector size\n");
    return;
  }
  buffer=(unsigned char *)MALLOC(mft_record_size);
  if((unsigned)disk_car->pread(disk_car, buffer, mft_record_size, mft_pos) != mft_record_size)
  {
    log_error("NTFS: Can't read MFT\n");
    free(buffer);
    return;
  }
  {
    const ntfs_attribresident *attrib=(const ntfs_attribresident *)ntfs_findattribute((const ntfs_recordheader*)buffer, 0x60, (char*)buffer+mft_record_size);
    if(attrib && attrib->header.bNonResident==0)	/* attribute is resident */
    {
      char *dest;
      const char *name_it;
      unsigned int volume_name_length=le32(attrib->cbAttribData);
      volume_name_length/=2;	/* Unicode */
      if(volume_name_length>sizeof(partition->fsname)-1)
	volume_name_length=sizeof(partition->fsname)-1;
      name_it=ntfs_getattributedata(attrib, (char*)(buffer+mft_record_size));
      if(name_it==NULL)
      {
	free(buffer);
	return;
      }
      for(dest=partition->fsname;
	  volume_name_length>0 && *name_it!='\0' && name_it[1]=='\0';
	  name_it+=2,volume_name_length--)
	*dest++=*name_it;
      *dest='\0'; /* 27 january 2003: Correct a bug found by Andreas du Plessis-Denz */
    }
  }
  free(buffer);
  return;
}