207 lines
7.5 KiB
C++
207 lines
7.5 KiB
C++
/*
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SPDX-FileCopyrightText: 2008-2011 Volker Lanz <vl@fidra.de>
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SPDX-FileCopyrightText: 2013-2018 Andrius Štikonas <andrius@stikonas.eu>
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SPDX-FileCopyrightText: 2015 Teo Mrnjavac <teo@kde.org>
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SPDX-FileCopyrightText: 2017 Pali Rohár <pali.rohar@gmail.com>
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SPDX-FileCopyrightText: 2020 Arnaud Ferraris <arnaud.ferraris@collabora.com>
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SPDX-FileCopyrightText: 2020 Gaël PORTAY <gael.portay@collabora.com>
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SPDX-License-Identifier: GPL-3.0-or-later
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*/
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#include "fs/fat12.h"
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#include "util/externalcommand.h"
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#include "util/capacity.h"
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#include "util/report.h"
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#include <KLocalizedString>
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#include <QRegularExpression>
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#include <QRegularExpressionValidator>
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#include <QString>
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#include <QStringList>
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#include <QDebug>
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#include <QtMath>
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#include <ctime>
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namespace FS
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{
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FileSystem::CommandSupportType fat12::m_GetUsed = FileSystem::cmdSupportNone;
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FileSystem::CommandSupportType fat12::m_GetLabel = FileSystem::cmdSupportNone;
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FileSystem::CommandSupportType fat12::m_SetLabel = FileSystem::cmdSupportNone;
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FileSystem::CommandSupportType fat12::m_Create = FileSystem::cmdSupportNone;
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FileSystem::CommandSupportType fat12::m_Grow = FileSystem::cmdSupportNone;
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FileSystem::CommandSupportType fat12::m_Shrink = FileSystem::cmdSupportNone;
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FileSystem::CommandSupportType fat12::m_Move = FileSystem::cmdSupportNone;
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FileSystem::CommandSupportType fat12::m_Check = FileSystem::cmdSupportNone;
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FileSystem::CommandSupportType fat12::m_Copy = FileSystem::cmdSupportNone;
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FileSystem::CommandSupportType fat12::m_Backup = FileSystem::cmdSupportNone;
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FileSystem::CommandSupportType fat12::m_UpdateUUID = FileSystem::cmdSupportNone;
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FileSystem::CommandSupportType fat12::m_GetUUID = FileSystem::cmdSupportNone;
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fat12::fat12(qint64 firstsector, qint64 lastsector, qint64 sectorsused, const QString& label, const QVariantMap& features, FileSystem::Type t) :
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FileSystem(firstsector, lastsector, sectorsused, label, features, t)
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{
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}
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void fat12::init()
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{
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m_Create = m_GetUsed = m_Check = findExternal(QStringLiteral("mkfs.fat"), {}, 1) ? cmdSupportFileSystem : cmdSupportNone;
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m_GetLabel = cmdSupportCore;
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m_SetLabel = findExternal(QStringLiteral("fatlabel")) ? cmdSupportFileSystem : cmdSupportNone;
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m_Move = cmdSupportCore;
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m_Copy = cmdSupportCore;
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m_Backup = cmdSupportCore;
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m_UpdateUUID = cmdSupportCore;
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m_GetUUID = cmdSupportCore;
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if (m_Create == cmdSupportFileSystem) {
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addAvailableFeature(QStringLiteral("sector-size"));
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addAvailableFeature(QStringLiteral("sectors-per-cluster"));
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}
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}
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bool fat12::supportToolFound() const
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{
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return
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m_GetUsed != cmdSupportNone &&
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m_GetLabel != cmdSupportNone &&
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m_SetLabel != cmdSupportNone &&
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m_Create != cmdSupportNone &&
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m_Check != cmdSupportNone &&
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m_UpdateUUID != cmdSupportNone &&
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m_Copy != cmdSupportNone &&
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m_Move != cmdSupportNone &&
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m_Backup != cmdSupportNone &&
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m_GetUUID != cmdSupportNone;
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}
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FileSystem::SupportTool fat12::supportToolName() const
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{
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// also, dd for updating the UUID, but let's assume it's there ;-)
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return SupportTool(QStringLiteral("dosfstools"), QUrl(QStringLiteral("http://www.daniel-baumann.ch/software/dosfstools/")));
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}
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qint64 fat12::minCapacity() const
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{
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return 1 * Capacity::unitFactor(Capacity::Unit::Byte, Capacity::Unit::MiB);
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}
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qint64 fat12::maxCapacity() const
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{
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return 255 * Capacity::unitFactor(Capacity::Unit::Byte, Capacity::Unit::MiB);
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}
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int fat12::maxLabelLength() const
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{
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return 11;
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}
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QValidator* fat12::labelValidator(QObject *parent) const
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{
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QRegularExpressionValidator *m_LabelValidator = new QRegularExpressionValidator(parent);
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m_LabelValidator->setRegularExpression(QRegularExpression(QStringLiteral(R"(^[^\x{0000}-\x{001F}\x{007F}-\x{FFFF}*?.,;:\/\\|+=<>\[\]"]*$)")));
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return m_LabelValidator;
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}
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qint64 fat12::readUsedCapacity(const QString& deviceNode) const
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{
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ExternalCommand cmd(QStringLiteral("fsck.fat"), { QStringLiteral("-n"), QStringLiteral("-v"), deviceNode });
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// Exit code 1 is returned when FAT dirty bit is set
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if (cmd.run(-1) && (cmd.exitCode() == 0 || cmd.exitCode() == 1)) {
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qint64 usedClusters = -1;
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QRegularExpression re(QStringLiteral("files, (\\d+)/\\d+ "));
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QRegularExpressionMatch reClusters = re.match(cmd.output());
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if (reClusters.hasMatch())
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usedClusters = reClusters.captured(1).toLongLong();
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qint64 clusterSize = -1;
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re.setPattern(QStringLiteral("(\\d+) bytes per cluster"));
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QRegularExpressionMatch reClusterSize = re.match(cmd.output());
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if (reClusterSize.hasMatch())
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clusterSize = reClusterSize.captured(1).toLongLong();
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if (usedClusters > -1 && clusterSize > -1)
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return usedClusters * clusterSize;
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}
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return -1;
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}
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bool fat12::writeLabel(Report& report, const QString& deviceNode, const QString& newLabel)
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{
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report.line() << xi18nc("@info:progress", "Setting label for partition <filename>%1</filename> to %2", deviceNode, newLabel.toUpper());
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// This is needed to support new dosfstool 4.2. Later we can drop dosfstools 4.1 and add -r flag.
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const QString label = newLabel.isEmpty() ? QStringLiteral("NO_LABEL") : newLabel;
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ExternalCommand cmd(report, QStringLiteral("fatlabel"), { deviceNode, label.toUpper() });
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return cmd.run(-1) && cmd.exitCode() == 0;
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}
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bool fat12::check(Report& report, const QString& deviceNode) const
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{
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ExternalCommand cmd(report, QStringLiteral("fsck.fat"), { QStringLiteral("-a"), QStringLiteral("-w"), QStringLiteral("-v"), deviceNode });
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return cmd.run(-1) && cmd.exitCode() == 0;
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}
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bool fat12::create(Report& report, const QString& deviceNode)
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{
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return createWithFatSize(report, deviceNode, 12);
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}
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bool fat12::createWithFatSize(Report &report, const QString& deviceNode, int fatSize)
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{
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QStringList args = QStringList();
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if (fatSize != 12 && fatSize != 16 && fatSize != 32)
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return false;
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for (const auto& k : this->features().keys()) {
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const auto& v = this->features().value(k);
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if (k == QStringLiteral("sector-size")) {
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quint32 sectorSize = v.toInt();
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/* sectorSize has to be a power of 2 between 512 and 32768 */
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if (sectorSize >= 512 && sectorSize <= 32768 && sectorSize == qNextPowerOfTwo(sectorSize - 1))
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args << QStringLiteral("-S%1").arg(sectorSize);
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else
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qWarning() << QStringLiteral("FAT sector size %1 is invalid, using default").arg(sectorSize);
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} else if (k == QStringLiteral("sectors-per-cluster")) {
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quint32 sectorsPerCluster = v.toInt();
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/* sectorsPerCluster has to be a power of 2 between 2 and 128 */
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if (sectorsPerCluster <= 128 && sectorsPerCluster == qNextPowerOfTwo(sectorsPerCluster - 1))
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args << QStringLiteral("-s%1").arg(sectorsPerCluster);
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else
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qWarning() << QStringLiteral("FAT sector size %1 is invalid, using default").arg(sectorsPerCluster);
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}
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}
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args << QStringLiteral("-F%1").arg(fatSize) << QStringLiteral("-I") << QStringLiteral("-v") << deviceNode;
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ExternalCommand cmd(report, QStringLiteral("mkfs.fat"), args);
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return cmd.run(-1) && cmd.exitCode() == 0;
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}
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bool fat12::updateUUID(Report& report, const QString& deviceNode) const
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{
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long int t = time(nullptr);
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char uuid[4];
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for (auto &u : uuid) {
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u = static_cast<char>(t & 0xff);
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t >>= 8;
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}
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ExternalCommand cmd;
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return cmd.writeData(report, QByteArray(uuid, sizeof(uuid)), deviceNode, 39);
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}
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}
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