File indexing completed on 2024-05-05 05:48:43

 /*
     SPDX-FileCopyrightText: 2008-2011 Volker Lanz <vl@fidra.de>
     SPDX-FileCopyrightText: 2013-2018 Andrius Štikonas <andrius@stikonas.eu>
     SPDX-FileCopyrightText: 2015 Teo Mrnjavac <teo@kde.org>
     SPDX-FileCopyrightText: 2017 Pali Rohár <pali.rohar@gmail.com>
     SPDX-FileCopyrightText: 2020 Arnaud Ferraris <arnaud.ferraris@collabora.com>
     SPDX-FileCopyrightText: 2020 Gaël PORTAY <gael.portay@collabora.com>
 
     SPDX-License-Identifier: GPL-3.0-or-later
 */
 
 #include "fs/fat12.h"
 
 #include "util/externalcommand.h"
 #include "util/capacity.h"
 #include "util/report.h"
 
 #include <KLocalizedString>
 
 #include <QRegularExpression>
 #include <QRegularExpressionValidator>
 #include <QString>
 #include <QStringList>
 
 #include <QDebug>
 #include <QtMath>
 
 #include <ctime>
 
 namespace FS
 {
 FileSystem::CommandSupportType fat12::m_GetUsed = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType fat12::m_GetLabel = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType fat12::m_SetLabel = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType fat12::m_Create = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType fat12::m_Grow = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType fat12::m_Shrink = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType fat12::m_Move = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType fat12::m_Check = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType fat12::m_Copy = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType fat12::m_Backup = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType fat12::m_UpdateUUID = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType fat12::m_GetUUID = FileSystem::cmdSupportNone;
 
 fat12::fat12(qint64 firstsector, qint64 lastsector, qint64 sectorsused, const QString& label, const QVariantMap& features, FileSystem::Type t) :
     FileSystem(firstsector, lastsector, sectorsused, label, features, t)
 {
 }
 
 void fat12::init()
 {
     m_Create = m_GetUsed = m_Check = findExternal(QStringLiteral("mkfs.fat"), {}, 1) ? cmdSupportFileSystem : cmdSupportNone;
     m_GetLabel = cmdSupportCore;
     m_SetLabel = findExternal(QStringLiteral("fatlabel")) ? cmdSupportFileSystem : cmdSupportNone;
     m_Move = cmdSupportCore;
     m_Copy = cmdSupportCore;
     m_Backup = cmdSupportCore;
     m_UpdateUUID = cmdSupportCore;
     m_GetUUID = cmdSupportCore;
 
     if (m_Create == cmdSupportFileSystem) {
         addAvailableFeature(QStringLiteral("sector-size"));
         addAvailableFeature(QStringLiteral("sectors-per-cluster"));
     }
 }
 
 bool fat12::supportToolFound() const
 {
     return
         m_GetUsed != cmdSupportNone &&
         m_GetLabel != cmdSupportNone &&
         m_SetLabel != cmdSupportNone &&
         m_Create != cmdSupportNone &&
         m_Check != cmdSupportNone &&
         m_UpdateUUID != cmdSupportNone &&
         m_Copy != cmdSupportNone &&
         m_Move != cmdSupportNone &&
         m_Backup != cmdSupportNone &&
         m_GetUUID != cmdSupportNone;
 }
 
 FileSystem::SupportTool fat12::supportToolName() const
 {
     // also, dd for updating the UUID, but let's assume it's there ;-)
     return SupportTool(QStringLiteral("dosfstools"), QUrl(QStringLiteral("http://www.daniel-baumann.ch/software/dosfstools/")));
 }
 
 
 qint64 fat12::minCapacity() const
 {
     return 1 * Capacity::unitFactor(Capacity::Unit::Byte, Capacity::Unit::MiB);
 }
 
 qint64 fat12::maxCapacity() const
 {
     return 255 * Capacity::unitFactor(Capacity::Unit::Byte, Capacity::Unit::MiB);
 }
 
 int fat12::maxLabelLength() const
 {
     return 11;
 }
 
 QValidator* fat12::labelValidator(QObject *parent) const
 {
     QRegularExpressionValidator *m_LabelValidator = new QRegularExpressionValidator(parent);
     m_LabelValidator->setRegularExpression(QRegularExpression(QStringLiteral(R"(^[^\x{0000}-\x{001F}\x{007F}-\x{FFFF}*?.,;:\/\\|+=<>\[\]"]*$)")));
     return m_LabelValidator;
 }
 
 qint64 fat12::readUsedCapacity(const QString& deviceNode) const
 {
     ExternalCommand cmd(QStringLiteral("fsck.fat"), { QStringLiteral("-n"), QStringLiteral("-v"), deviceNode });
 
     // Exit code 1 is returned when FAT dirty bit is set
     if (cmd.run(-1) && (cmd.exitCode() == 0 || cmd.exitCode() == 1)) {
         qint64 usedClusters = -1;
         QRegularExpression re(QStringLiteral("files, (\\d+)/\\d+ "));
         QRegularExpressionMatch reClusters = re.match(cmd.output());
 
         if (reClusters.hasMatch())
             usedClusters = reClusters.captured(1).toLongLong();
 
         qint64 clusterSize = -1;
 
         re.setPattern(QStringLiteral("(\\d+) bytes per cluster"));
         QRegularExpressionMatch reClusterSize = re.match(cmd.output());
 
         if (reClusterSize.hasMatch())
             clusterSize = reClusterSize.captured(1).toLongLong();
 
         if (usedClusters > -1 && clusterSize > -1)
             return usedClusters * clusterSize;
     }
 
     return -1;
 }
 
 bool fat12::writeLabel(Report& report, const QString& deviceNode, const QString& newLabel)
 {
     report.line() << xi18nc("@info:progress", "Setting label for partition <filename>%1</filename> to %2", deviceNode, newLabel);
 
     const QString label = newLabel.isEmpty() ? QStringLiteral("-r") : newLabel;
     ExternalCommand cmd(report, QStringLiteral("fatlabel"), { deviceNode, label });
     return cmd.run(-1) && cmd.exitCode() == 0;
 }
 
 bool fat12::check(Report& report, const QString& deviceNode) const
 {
     ExternalCommand cmd(report, QStringLiteral("fsck.fat"), { QStringLiteral("-a"), QStringLiteral("-w"), QStringLiteral("-v"), deviceNode });
     return cmd.run(-1) && cmd.exitCode() == 0;
 }
 
 bool fat12::create(Report& report, const QString& deviceNode)
 {
     return createWithFatSize(report, deviceNode, 12);
 }
 
 bool fat12::createWithFatSize(Report &report, const QString& deviceNode, int fatSize)
 {
     QStringList args = QStringList();
 
     if (fatSize != 12 && fatSize != 16 && fatSize != 32)
         return false;
 
     for (const auto& k : this->features().keys()) {
     const auto& v = this->features().value(k);
         if (k == QStringLiteral("sector-size")) {
             quint32 sectorSize = v.toInt();
 
             /* sectorSize has to be a power of 2 between 512 and 32768 */
             if (sectorSize >= 512 && sectorSize <= 32768 && sectorSize == qNextPowerOfTwo(sectorSize - 1))
                 args << QStringLiteral("-S%1").arg(sectorSize);
             else
                 qWarning() << QStringLiteral("FAT sector size %1 is invalid, using default").arg(sectorSize);
         } else if (k == QStringLiteral("sectors-per-cluster")) {
             quint32 sectorsPerCluster = v.toInt();
 
             /* sectorsPerCluster has to be a power of 2 between 2 and 128 */
             if (sectorsPerCluster <= 128 && sectorsPerCluster == qNextPowerOfTwo(sectorsPerCluster - 1))
                 args << QStringLiteral("-s%1").arg(sectorsPerCluster);
             else
                 qWarning() << QStringLiteral("FAT sector size %1 is invalid, using default").arg(sectorsPerCluster);
         }
     }
     args << QStringLiteral("-F%1").arg(fatSize) << QStringLiteral("-I") << QStringLiteral("-v") << deviceNode;
 
     ExternalCommand cmd(report, QStringLiteral("mkfs.fat"), args);
     return cmd.run(-1) && cmd.exitCode() == 0;
 }
 
 bool fat12::updateUUID(Report& report, const QString& deviceNode) const
 {
     long int t = time(nullptr);
 
     char uuid[4];
     for (auto &u : uuid) {
         u = static_cast<char>(t & 0xff);
         t >>= 8;
     }
 
     ExternalCommand cmd;
     return cmd.writeData(report, QByteArray(uuid, sizeof(uuid)), deviceNode, 39);
 }
 }