315 lines
10 KiB
C++
315 lines
10 KiB
C++
/* Copyright (C) 2004 Bart
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* Copyright (C) 2008, 2009, 2010, 2011, 2012 Curtis Gedak
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "fat16.h"
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#include "FileSystem.h"
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#include "Partition.h"
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#include <glibmm/miscutils.h>
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#include <glibmm/shell.h>
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namespace GParted
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{
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const Glib::ustring & fat16::get_custom_text( CUSTOM_TEXT ttype, int index ) const
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{
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static const Glib::ustring change_uuid_warning[] =
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{ _("Changing the UUID might invalidate the Windows Product Activation "
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"(WPA) key"),
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_("On FAT and NTFS file systems, the Volume Serial Number is used as "
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"the UUID. Changing the Volume Serial Number on the Windows system "
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"partition, normally C:, might invalidate the WPA key. An invalid "
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"WPA key will prevent login until you reactivate Windows."),
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_("Changing the UUID on external storage media and non-system "
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"partitions is usually safe, but guarantees cannot be given."),
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""
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};
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int i ;
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switch ( ttype ) {
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case CTEXT_CHANGE_UUID_WARNING :
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for ( i = 0 ; i < index && change_uuid_warning[i] != "" ; i++ )
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; // Just iterate...
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return change_uuid_warning[i];
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default :
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return FileSystem::get_custom_text( ttype, index ) ;
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}
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}
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FS fat16::get_filesystem_support()
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{
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FS fs( specific_type );
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// hack to disable silly mtools warnings
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setenv( "MTOOLS_SKIP_CHECK", "1", 0 );
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fs .busy = FS::GPARTED ;
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if (! Glib::find_program_in_path("mdir").empty())
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{
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fs.read_uuid = FS::EXTERNAL;
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if (! Glib::find_program_in_path("minfo").empty())
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fs.read = FS::EXTERNAL;
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}
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//find out if we can create fat file systems
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if ( ! Glib::find_program_in_path( "mkfs.fat" ) .empty() )
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{
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fs.create = FS::EXTERNAL;
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fs.create_with_label = FS::EXTERNAL;
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}
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if ( ! Glib::find_program_in_path( "fsck.fat" ) .empty() )
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{
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fs.check = FS::EXTERNAL;
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}
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if ( ! Glib::find_program_in_path( "mlabel" ) .empty() ) {
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fs .read_label = FS::EXTERNAL ;
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fs .write_label = FS::EXTERNAL ;
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fs .write_uuid = FS::EXTERNAL ;
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}
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#ifdef HAVE_LIBPARTED_FS_RESIZE
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//resizing of start and endpoint are provided by libparted
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fs.grow = FS::LIBPARTED;
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fs.shrink = FS::LIBPARTED;
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#endif
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fs .move = FS::GPARTED ;
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fs.copy = FS::GPARTED;
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fs .online_read = FS::GPARTED ;
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if (fs.fstype == FS_FAT16)
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{
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fs_limits.min_size = 16 * MEBIBYTE;
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fs_limits.max_size = (4096 - 1) * MEBIBYTE; // Maximum seems to be just less than 4096 MiB.
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}
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else //FS_FAT32
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{
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fs_limits.min_size = 33 * MEBIBYTE; // Smaller file systems will cause Windows' scandisk to fail.
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// Maximum FAT32 volume size with 512 byte sectors is 2 TiB.
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// * Wikipedia: File Allocation Table / FAT32
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// https://en.wikipedia.org/wiki/File_Allocation_Table#FAT32
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fs_limits.max_size = 2 * TEBIBYTE;
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}
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return fs ;
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}
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void fat16::set_used_sectors( Partition & partition )
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{
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// Use mdir's scanning of the FAT to get the free space.
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// https://en.wikipedia.org/wiki/Design_of_the_FAT_file_system#File_Allocation_Table
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exit_status = Utils::execute_command("mdir -i " + Glib::shell_quote(partition.get_path()) + " ::/",
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output, error, true);
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if (exit_status != 0)
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{
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if (! output.empty())
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partition.push_back_message(output);
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if (! error.empty())
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partition.push_back_message(error);
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return;
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}
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// Bytes free. Parse the value from the bottom of the directory listing by mdir.
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// Example line " 277 221 376 bytes free".
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Glib::ustring spaced_number_str = Utils::regexp_label(output, "^ *([0-9 ]*) bytes free$");
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Glib::ustring number_str = remove_spaces(spaced_number_str);
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long long bytes_free = -1;
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if (number_str.size() > 0)
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bytes_free = atoll(number_str.c_str());
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// Use minfo's reporting of the BPB (BIOS Parameter Block) to get the file system
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// size and FS block (cluster) size.
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// https://en.wikipedia.org/wiki/Design_of_the_FAT_file_system#BIOS_Parameter_Block
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exit_status = Utils::execute_command("minfo -i " + Glib::shell_quote(partition.get_path()) + " ::",
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output, error, true);
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if (exit_status != 0)
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{
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if (! output.empty())
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partition.push_back_message(output);
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if (! error.empty())
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partition.push_back_message(error);
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return;
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}
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// FS logical sector size in bytes
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long long logical_sector_size = -1;
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Glib::ustring::size_type index = output.find("sector size:");
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if (index < output.length())
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sscanf(output.substr(index).c_str(), "sector size: %lld bytes", &logical_sector_size);
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// Cluster size in FS logical sectors
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long long cluster_size = -1;
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index = output.find("cluster size:");
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if (index < output.length())
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sscanf(output.substr(index).c_str(), "cluster size: %lld sectors", &cluster_size);
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// FS size in logical sectors if <= 65535, or 0 otherwise
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long long small_size = -1;
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index = output.find("small size:");
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if (index < output.length())
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sscanf(output.substr(index).c_str(), "small size: %lld sectors", &small_size);
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// FS size in logical sectors if > 65535, or 0 otherwise
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long long big_size = -1;
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index = output.find("big size:");
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if (index < output.length())
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sscanf(output.substr(index).c_str(), "big size: %lld sectors", &big_size);
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// FS size in logical sectors
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long long logical_sectors = -1;
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if (small_size > 0)
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logical_sectors = small_size;
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else if (big_size > 0)
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logical_sectors = big_size;
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if (bytes_free > -1 && logical_sector_size > -1 && cluster_size > -1 && logical_sectors > -1)
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{
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Sector fs_free = bytes_free / partition.sector_size;
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Sector fs_size = logical_sectors * logical_sector_size / partition.sector_size;
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partition.set_sector_usage(fs_size, fs_free);
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partition.fs_block_size = logical_sector_size * cluster_size;
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}
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}
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void fat16::read_label(Partition& partition)
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{
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exit_status = Utils::execute_command("mlabel -s -i " + Glib::shell_quote(partition.get_path()) + " ::",
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output, error, true);
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if (exit_status != 0)
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{
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if (! output.empty())
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partition.push_back_message(output);
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if (! error.empty())
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partition.push_back_message(error);
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return;
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}
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partition.set_filesystem_label(Utils::trim(Utils::regexp_label(output, "Volume label is ([^(]*)")));
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}
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bool fat16::write_label( const Partition & partition, OperationDetail & operationdetail )
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{
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Glib::ustring cmd = "" ;
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if ( partition.get_filesystem_label().empty() )
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cmd = "mlabel -c -i " + Glib::shell_quote(partition.get_path()) + " ::";
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else
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cmd = "mlabel -i " + Glib::shell_quote(partition.get_path()) +
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" ::" + Glib::shell_quote(sanitize_label(partition.get_filesystem_label()));
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return ! execute_command( cmd, operationdetail, EXEC_CHECK_STATUS );
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}
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void fat16::read_uuid(Partition& partition)
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{
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exit_status = Utils::execute_command("mdir -f -i " + Glib::shell_quote(partition.get_path()) + " ::/",
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output, error, true);
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if (exit_status != 0)
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{
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if (! output.empty())
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partition.push_back_message(output);
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if (! error.empty())
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partition.push_back_message(error);
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return;
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}
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partition.uuid = Utils::regexp_label(output, "Volume Serial Number is[[:blank:]]([^[:space:]]+)");
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if (partition.uuid == "0000-0000")
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partition.uuid.clear();
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}
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bool fat16::write_uuid( const Partition & partition, OperationDetail & operationdetail )
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{
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return ! execute_command("mlabel -s -n -i " + Glib::shell_quote(partition.get_path()) + " ::",
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operationdetail, EXEC_CHECK_STATUS);
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}
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bool fat16::create( const Partition & new_partition, OperationDetail & operationdetail )
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{
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Glib::ustring fat_size = specific_type == FS_FAT16 ? "16" : "32" ;
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Glib::ustring label_args = new_partition.get_filesystem_label().empty() ? "" :
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"-n " + Glib::shell_quote( sanitize_label( new_partition.get_filesystem_label() ) ) + " ";
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return ! execute_command("mkfs.fat -F" + fat_size + " -v -I " + label_args +
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Glib::shell_quote(new_partition.get_path()),
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operationdetail,
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EXEC_CHECK_STATUS|EXEC_CANCEL_SAFE);
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}
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bool fat16::check_repair( const Partition & partition, OperationDetail & operationdetail )
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{
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exit_status = execute_command("fsck.fat -a -w -v " + Glib::shell_quote(partition.get_path()),
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operationdetail,
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EXEC_CANCEL_SAFE);
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bool success = ( exit_status == 0 || exit_status == 1 );
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set_status( operationdetail, success );
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return success;
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}
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//Private methods
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const Glib::ustring fat16::sanitize_label( const Glib::ustring &label ) const
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{
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Glib::ustring uppercase_label = label.uppercase();
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Glib::ustring new_label;
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// Copy uppercase label excluding prohibited characters.
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// [1] Microsoft TechNet: Label
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// https://technet.microsoft.com/en-us/library/bb490925.aspx
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// [2] Replicated in Wikikedia: label (command)
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// https://en.wikipedia.org/wiki/Label_%28command%29
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// Also exclude:
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// * Single quote (') because it is encoded by mlabel but not understood by
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// Windows;
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// * ASCII control characters below SPACE because mlabel requests input in the
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// same way it does for prohibited characters causing GParted to wait forever.
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Glib::ustring prohibited_chars( "*?.,;:/\\|+=<>[]\"'" );
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for ( unsigned int i = 0 ; i < uppercase_label.size() ; i ++ )
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if ( prohibited_chars.find( uppercase_label[i] ) == Glib::ustring::npos &&
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uppercase_label[i] >= ' ' )
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new_label.push_back( uppercase_label[i] );
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// Pad with spaces to prevent mlabel writing corrupted labels. See bug #700228.
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new_label .resize( Utils::get_filesystem_label_maxlength( specific_type ), ' ' ) ;
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return new_label ;
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}
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Glib::ustring fat16::remove_spaces(const Glib::ustring& str)
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{
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Glib::ustring result;
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for (unsigned int i = 0; i < str.size(); i++)
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{
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if (str[i] != ' ')
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result += str[i];
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}
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return result;
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}
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} //GParted
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