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Viewing changes to src/fs/ext2.cpp

  • Committer: Bazaar Package Importer
  • Author(s): Anthony Mercatante
  • Date: 2009-01-23 17:57:36 UTC
  • Revision ID: james.westby@ubuntu.com-20090123175736-2ltrhgg3m55dokbm
Tags: upstream-1.0.0~beta1a
Import upstream version 1.0.0~beta1a

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src/fs/ext2.cpp
 
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/***************************************************************************
 
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 *   Copyright (C) 2008 by Volker Lanz <vl@fidra.de>                       *
 
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 *                                                                         *
 
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 *   This program is free software; you can redistribute it and/or modify  *
 
5
 *   it under the terms of the GNU General Public License as published by  *
 
6
 *   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        *
 
11
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 
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 *   GNU General Public License for more details.                          *
 
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 *                                                                         *
 
14
 *   You should have received a copy of the GNU General Public License     *
 
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 *   along with this program; if not, write to the                         *
 
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 *   Free Software Foundation, Inc.,                                       *
 
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 *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
 
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 ***************************************************************************/
 
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#include "fs/ext2.h"
 
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#include "util/externalcommand.h"
 
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#include "util/capacity.h"
 
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#include <QString>
 
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#include <QRegExp>
 
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namespace FS
 
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{
 
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        FileSystem::SupportType ext2::m_GetUsed = FileSystem::SupportNone;
 
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        FileSystem::SupportType ext2::m_GetLabel = FileSystem::SupportNone;
 
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        FileSystem::SupportType ext2::m_Create = FileSystem::SupportNone;
 
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        FileSystem::SupportType ext2::m_Grow = FileSystem::SupportNone;
 
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        FileSystem::SupportType ext2::m_Shrink = FileSystem::SupportNone;
 
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        FileSystem::SupportType ext2::m_Move = FileSystem::SupportNone;
 
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        FileSystem::SupportType ext2::m_Check = FileSystem::SupportNone;
 
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        FileSystem::SupportType ext2::m_Copy = FileSystem::SupportNone;
 
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        FileSystem::SupportType ext2::m_Backup = FileSystem::SupportNone;
 
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        FileSystem::SupportType ext2::m_SetLabel = FileSystem::SupportNone;
 
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        FileSystem::SupportType ext2::m_UpdateUUID = FileSystem::SupportNone;
 
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        ext2::ext2(qint64 firstsector, qint64 lastsector, qint64 sectorsused, const QString& label, FileSystem::Type t) :
 
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                FileSystem(firstsector, lastsector, sectorsused, label, t)
 
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        {
 
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        }
 
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        void ext2::init()
 
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        {
 
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                m_GetUsed = findExternal("dumpe2fs") ? SupportExternal : SupportNone;
 
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                m_SetLabel = m_GetLabel = findExternal("e2label") ? SupportExternal : SupportNone;
 
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                m_Create = findExternal("mkfs.ext2") ? SupportExternal : SupportNone;
 
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                m_Check = findExternal("e2fsck", QStringList() << "-V") ? SupportExternal : SupportNone;
 
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                m_UpdateUUID = findExternal("tune2fs") ? SupportExternal : SupportNone;
 
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                m_Grow = (m_Check != SupportNone && findExternal("resize2fs")) ? SupportExternal : SupportNone;
 
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                m_Shrink = m_GetUsed != SupportNone ? SupportExternal : SupportNone;
 
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                m_Copy = (m_Check != SupportNone) ? SupportInternal : SupportNone;
 
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                m_Move = (m_Check != SupportNone) ? SupportInternal : SupportNone;
 
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                m_Backup = SupportInternal;
 
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        }
 
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        qint64 ext2::maxCapacity() const
 
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        {
 
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                 return Capacity::unitFactor(Capacity::Byte, Capacity::EiB);
 
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        }
 
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        qint64 ext2::readUsedCapacity(const QString& deviceNode) const
 
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        {
 
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                ExternalCommand cmd("dumpe2fs", QStringList() << "-h" << deviceNode);
 
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                if (cmd.run())
 
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                {
 
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                        qint64 blockCount = -1;
 
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                        QRegExp rxBlockCount("Block count:\\s*(\\d+)");
 
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                        if (rxBlockCount.indexIn(cmd.output()) != -1)
 
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                                blockCount = rxBlockCount.cap(1).toLongLong();
 
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                        qint64 freeBlocks = -1;
 
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                        QRegExp rxFreeBlocks("Free blocks:\\s*(\\d+)");
 
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                        if (rxFreeBlocks.indexIn(cmd.output()) != -1)
 
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                                freeBlocks = rxFreeBlocks.cap(1).toLongLong();
 
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                        qint64 blockSize = -1;
 
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                        QRegExp rxBlockSize("Block size:\\s*(\\d+)");
 
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                        if (rxBlockSize.indexIn(cmd.output()) != -1)
 
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                                blockSize = rxBlockSize.cap(1).toLongLong();
 
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                        if (blockCount > -1 && freeBlocks > -1 && blockSize > -1)
 
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                                return (blockCount - freeBlocks) * blockSize;
 
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                }
 
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                return -1;
 
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        }
 
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        QString ext2::readLabel(const QString& deviceNode) const
 
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        {
 
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                ExternalCommand cmd("e2label", QStringList() << deviceNode);
 
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                return cmd.run() ? cmd.output().simplified() : QString();
 
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        }
 
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        bool ext2::check(Report& report, const QString& deviceNode) const
 
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        {
 
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                ExternalCommand cmd(report, "e2fsck", QStringList() << "-f" << "-y" << "-v" << deviceNode);
 
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                return cmd.run(-1) && (cmd.exitCode() == 0 || cmd.exitCode() == 1 || cmd.exitCode() == 2 || cmd.exitCode() == 256);
 
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        }
 
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        bool ext2::create(Report& report, const QString& deviceNode) const
 
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        {
 
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                return ExternalCommand(report, "mkfs.ext2", QStringList() << deviceNode).run(-1);
 
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        }
 
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        bool ext2::resize(Report& report, const QString& deviceNode, qint64 length) const
 
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        {
 
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                const QString len = QString::number(length / 512) + 's';
 
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                ExternalCommand cmd(report, "resize2fs", QStringList() << deviceNode << len);
 
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                return cmd.run(-1) && cmd.exitCode() == 0;
 
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        }
 
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        bool ext2::writeLabel(Report& report, const QString& deviceNode, const QString& newLabel)
 
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        {
 
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                return ExternalCommand(report, "e2label", QStringList() << deviceNode << newLabel).run(-1);
 
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        }
 
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        bool ext2::updateUUID(Report& report, const QString& deviceNode) const
 
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        {
 
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                return ExternalCommand(report, "tune2fs", QStringList() << "-U" << "random" << deviceNode).run(-1);
 
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        }
 
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}