path: root/src/corelib/io/qstorageinfo_p.h

// Copyright (C) 2014 Ivan Komissarov <ABBAPOH@gmail.com>// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only#ifndef QSTORAGEINFO_P_H#define QSTORAGEINFO_P_H//// W A R N I N G// -------------//// This file is not part of the Qt API. It exists purely as an// implementation detail. This header file may change from version to// version without notice, or even be removed.//// We mean it.//#include <QtCore/qloggingcategory.h>#include <QtCore/qsystemdetection.h>#include <QtCore/qtenvironmentvariables.h>#include <QtCore/private/qglobal_p.h>#include"qstorageinfo.h"#ifdef Q_OS_UNIX#include <sys/types.h>// dev_t#endif QT_BEGIN_NAMESPACE Q_DECLARE_LOGGING_CATEGORY(lcStorageInfo)class QStorageInfoPrivate :public QSharedData {public:QStorageInfoPrivate() =default;voiddoStat();static QList<QStorageInfo>mountedVolumes();static QStorageInfo root(){#ifdef Q_OS_WINreturnQStorageInfo(QDir::fromNativeSeparators(QFile::decodeName(qgetenv("SystemDrive"))));#elsereturnQStorageInfo(QStringLiteral("/"));#endif}protected:#if defined(Q_OS_WIN)voidinitRootPath();voidretrieveVolumeInfo();voidretrieveDiskFreeSpace();boolqueryStorageProperty();voidqueryFileFsSectorSizeInformation();#elif defined(Q_OS_DARWIN)voidinitRootPath();voidretrievePosixInfo();voidretrieveUrlProperties(bool initRootPath =false);voidretrieveLabel();#elif defined(Q_OS_LINUX)voidretrieveVolumeInfo();public:struct MountInfo { QString mountPoint; QByteArray fsType; QByteArray device; QByteArray fsRoot; dev_t stDev =0; quint64 mntid =0;};voidsetFromMountInfo(MountInfo &&info){ rootPath =std::move(info.mountPoint); fileSystemType =std::move(info.fsType); device =std::move(info.device); subvolume =std::move(info.fsRoot);}QStorageInfoPrivate(MountInfo &&info){setFromMountInfo(std::move(info));}#elif defined(Q_OS_UNIX)voidinitRootPath();voidretrieveVolumeInfo();#endif#ifdef Q_OS_UNIX// Common helper functionstemplate<typename String>static boolisParentOf(const String &parent,const QString &dirName){return dirName.startsWith(parent) &&(dirName.size() == parent.size() || dirName.at(parent.size()) == u'/'|| parent.size() ==1);}staticinlineboolshouldIncludeFs(const QString &mountDir,const QByteArray &fsType);#endifpublic: QString rootPath; QByteArray device; QByteArray subvolume; QByteArray fileSystemType; QString name; qint64 bytesTotal = -1; qint64 bytesFree = -1; qint64 bytesAvailable = -1;int blockSize = -1;bool readOnly =false;bool ready =false;bool valid =false;};#ifdef Q_OS_UNIXboolQStorageInfoPrivate::shouldIncludeFs(const QString &mountDir,const QByteArray &fsType){#if defined(Q_OS_ANDROID)// "rootfs" is the filesystem type of "/" on Androidstaticconstexprchar RootFsStr[] ="";#else// "rootfs" is a type of ramfs on Linux, used in the initrd on some distrosstaticconstexprchar RootFsStr[] ="rootfs";#endifusing namespaceQt::StringLiterals;/* * This function implements a heuristic algorithm to determine whether a * given mount should be reported to the user. Our objective is to list * only entries that the end-user would find useful. * * We therefore ignore: * - mounted in /dev, /proc, /sys: special mounts * (this will catch /sys/fs/cgroup, /proc/sys/fs/binfmt_misc, /dev/pts, * some of which are tmpfs on Linux) * - mounted in /var/run or /var/lock: most likely pseudofs * (on earlier systemd versions, /var/run was a bind-mount of /run, so * everything would be unnecessarily duplicated) * - filesystem type is "rootfs": artifact of the root-pivot on some Linux * initrd * - if the filesystem total size is zero, it's a pseudo-fs (not checked here). */if(isParentOf("/dev"_L1, mountDir)||isParentOf("/proc"_L1, mountDir)||isParentOf("/sys"_L1, mountDir)||isParentOf("/var/run"_L1, mountDir)||isParentOf("/var/lock"_L1, mountDir)) {return false;}if(!fsType.isEmpty() && fsType == RootFsStr)return false;// size checking in QStorageInfo::mountedVolumes()return true;}#endif// Q_OS_UNIX QT_END_NAMESPACE #endif// QSTORAGEINFO_P_H