File indexing completed on 2024-05-05 05:48:45

 /*
     SPDX-FileCopyrightText: 2008-2010 Volker Lanz <vl@fidra.de>
     SPDX-FileCopyrightText: 2012-2018 Andrius Štikonas <andrius@stikonas.eu>
     SPDX-FileCopyrightText: 2016 Teo Mrnjavac <teo@kde.org>
     SPDX-FileCopyrightText: 2016 Chantara Tith <tith.chantara@gmail.com>
     SPDX-FileCopyrightText: 2019 Yuri Chornoivan <yurchor@ukr.net>
     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/linuxswap.h"
 
 #include "util/externalcommand.h"
 
 #include <KLocalizedString>
 
 #include <QFileInfo>
 #include <QRegularExpression>
 #include <QTextStream>
 
 namespace FS
 {
 FileSystem::CommandSupportType linuxswap::m_Create = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType linuxswap::m_Grow = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType linuxswap::m_Shrink = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType linuxswap::m_Move = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType linuxswap::m_Copy = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType linuxswap::m_GetUsed = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType linuxswap::m_GetLabel = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType linuxswap::m_SetLabel = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType linuxswap::m_GetUUID = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType linuxswap::m_UpdateUUID = FileSystem::cmdSupportNone;
 
 linuxswap::linuxswap(qint64 firstsector, qint64 lastsector, qint64 sectorsused, const QString& label, const QVariantMap& features) :
     FileSystem(firstsector, lastsector, sectorsused, label, features, FileSystem::Type::LinuxSwap)
 {
 }
 
 void linuxswap::init()
 {
     m_SetLabel = m_Shrink = m_Grow = m_Create = m_UpdateUUID = (findExternal(QStringLiteral("mkswap"))) ? cmdSupportFileSystem : cmdSupportNone;
     m_GetLabel = cmdSupportCore;
     m_GetUsed = cmdSupportFileSystem;
     m_Copy = cmdSupportFileSystem;
     m_Move = cmdSupportCore;
     m_GetUUID = cmdSupportCore;
 }
 
 bool linuxswap::supportToolFound() const
 {
     return
         m_GetUsed != cmdSupportNone &&
         m_GetLabel != cmdSupportNone &&
         m_SetLabel != cmdSupportNone &&
         m_Create != cmdSupportNone &&
 //         m_Check != cmdSupportNone &&
         m_UpdateUUID != cmdSupportNone &&
         m_Grow != cmdSupportNone &&
         m_Shrink != cmdSupportNone &&
         m_Copy != cmdSupportNone &&
         m_Move != cmdSupportNone &&
 //         m_Backup != cmdSupportNone &&
         m_GetUUID != cmdSupportNone;
 }
 
 FileSystem::SupportTool linuxswap::supportToolName() const
 {
     return SupportTool(QStringLiteral("util-linux"), QUrl(QStringLiteral("https://github.com/karelzak/util-linux")));
 }
 
 int linuxswap::maxLabelLength() const
 {
     return 15;
 }
 
 bool linuxswap::create(Report& report, const QString& deviceNode)
 {
     ExternalCommand cmd(report, QStringLiteral("mkswap"), { deviceNode });
     return cmd.run(-1) && cmd.exitCode() == 0;
 }
 
 bool linuxswap::resize(Report& report, const QString& deviceNode, qint64 length) const
 {
     Q_UNUSED(length)
     const QString label = readLabel(deviceNode);
     const QString uuid = readUUID(deviceNode);
 
     QStringList args;
     if (!label.isEmpty())
         args << QStringLiteral("--label") << label;
     if (!uuid.isEmpty())
         args << QStringLiteral("--uuid") << uuid;
 
     args << deviceNode;
 
     ExternalCommand cmd(report, QStringLiteral("mkswap"), args);
     return cmd.run(-1) && cmd.exitCode() == 0;
 }
 
 bool linuxswap::copy(Report& report, const QString& targetDeviceNode, const QString& sourceDeviceNode) const
 {
     const QString label = readLabel(sourceDeviceNode);
     const QString uuid = readUUID(sourceDeviceNode);
 
     QStringList args;
     if (!label.isEmpty())
         args << QStringLiteral("--label") << label;
     if (!uuid.isEmpty())
         args << QStringLiteral("--uuid") << uuid;
 
     args << targetDeviceNode;
 
     ExternalCommand cmd(report, QStringLiteral("mkswap"), args);
     return cmd.run(-1) && cmd.exitCode() == 0;
 }
 
 bool linuxswap::writeLabel(Report& report, const QString& deviceNode, const QString& newLabel)
 {
     ExternalCommand cmd(report, QStringLiteral("swaplabel"), { QStringLiteral("--label"), newLabel, deviceNode });
     return cmd.run(-1) && cmd.exitCode() == 0;
 }
 
 QString linuxswap::mountTitle() const
 {
     return xi18nc("@title:menu", "Activate swap");
 }
 
 QString linuxswap::unmountTitle() const
 {
     return xi18nc("@title:menu", "Deactivate swap");
 }
 
 bool linuxswap::canMount(const QString& deviceNode, const QString& mountPoint) const {
     Q_UNUSED(deviceNode)
     // linux swap doesn't require mount point to activate
     return mountPoint != QStringLiteral("/");
 }
 
 bool linuxswap::mount(Report& report, const QString& deviceNode, const QString& mountPoint)
 {
     Q_UNUSED(mountPoint)
     ExternalCommand cmd(report, QStringLiteral("swapon"), { deviceNode });
     return cmd.run(-1) && cmd.exitCode() == 0;
 }
 
 bool linuxswap::unmount(Report& report, const QString& deviceNode)
 {
     ExternalCommand cmd(report, QStringLiteral("swapoff"), { deviceNode });
     return cmd.run(-1) && cmd.exitCode() == 0;
 }
 
 bool linuxswap::updateUUID(Report& report, const QString& deviceNode) const
 {
     const QString label = readLabel(deviceNode);
 
     QStringList args;
     if (!label.isEmpty())
         args << QStringLiteral("--label") << label;
 
     args << deviceNode;
 
     ExternalCommand cmd(report, QStringLiteral("mkswap"), args);
     return cmd.run(-1) && cmd.exitCode() == 0;
 }
 
 qint64 linuxswap::readUsedCapacity(const QString& deviceNode) const
 {
     QFile swapsFile(QStringLiteral("/proc/swaps"));
 
     if (swapsFile.open(QIODevice::ReadOnly)) {
         QByteArray data = swapsFile.readAll();
         swapsFile.close();
         QTextStream in(&data);
         while (!in.atEnd()) {
             QStringList line = in.readLine().split(QRegularExpression(QStringLiteral("\\s+")));
             QFileInfo kernelPath(deviceNode);
             if (line[0] == kernelPath.canonicalFilePath())
                 return line[3].toLongLong() * 1024;
         }
     }
     return -1;
 }
 }