From b168c6c8248662da31dbaaf2afb8e771a9ecdc85 Mon Sep 17 00:00:00 2001 From: Thiago Macieira Date: Tue, 17 Nov 2015 22:21:53 -0800 Subject: QStorageInfo: fix matching of mountpoints to sibling directories The path "/usrfoo" starts with "/usr", so if you tried to get QStorageInfo("/usrfoo") when "/usr" is a mount point, you'd get the wrong filesystem. [ChangeLog][QtCore][QStorageInfo] Fixed a bug that caused QStorageInfo to report information for the wrong filesystem if there is a mounted filesystem at a path that is a prefix of the requested path (e.g., it would report "/usr" filesystem for "/usrfoo"). Task-number: QTBUG-49498 Change-Id: I3e15a26e0e424169ac2bffff1417b7a27cd0132d Reviewed-by: Jake Petroules --- src/corelib/io/qstorageinfo_unix.cpp | 58 +++++++++------- .../corelib/io/qstorageinfo/tst_qstorageinfo.cpp | 2 + tests/manual/manual.pro | 1 + tests/manual/qstorageinfo/main.cpp | 81 ++++++++++++++++++++++ tests/manual/qstorageinfo/qstorageinfo.pro | 4 ++ 5 files changed, 122 insertions(+), 24 deletions(-) create mode 100644 tests/manual/qstorageinfo/main.cpp create mode 100644 tests/manual/qstorageinfo/qstorageinfo.pro diff --git a/src/corelib/io/qstorageinfo_unix.cpp b/src/corelib/io/qstorageinfo_unix.cpp index e365d8d7e6..bbcc29c50b 100644 --- a/src/corelib/io/qstorageinfo_unix.cpp +++ b/src/corelib/io/qstorageinfo_unix.cpp @@ -102,25 +102,6 @@ QT_BEGIN_NAMESPACE -static bool isPseudoFs(const QString &mountDir, const QByteArray &type) -{ - if (mountDir.startsWith(QLatin1String("/dev")) - || mountDir.startsWith(QLatin1String("/proc")) - || mountDir.startsWith(QLatin1String("/sys")) - || mountDir.startsWith(QLatin1String("/var/run")) - || mountDir.startsWith(QLatin1String("/var/lock"))) { - return true; - } - if (type == "tmpfs") - return true; -#if defined(Q_OS_LINUX) - if (type == "rootfs" || type == "rpc_pipefs") - return true; -#endif - - return false; -} - class QStorageIterator { public: @@ -158,6 +139,36 @@ private: #endif }; +template +static bool isParentOf(const String &parent, const QString &dirName) +{ + return dirName.startsWith(parent) && + (dirName.size() == parent.size() || dirName.at(parent.size()) == QLatin1Char('/') || + parent.size() == 1); +} + +static bool isPseudoFs(const QStorageIterator &it) +{ + QString mountDir = it.rootPath(); + if (isParentOf(QLatin1String("/dev"), mountDir) + || isParentOf(QLatin1String("/proc"), mountDir) + || isParentOf(QLatin1String("/sys"), mountDir) + || isParentOf(QLatin1String("/var/run"), mountDir) + || isParentOf(QLatin1String("/var/lock"), mountDir)) { + return true; + } + + QByteArray type = it.fileSystemType(); + if (type == "tmpfs") + return true; +#if defined(Q_OS_LINUX) + if (type == "rootfs" || type == "rpc_pipefs") + return true; +#endif + + return false; +} + #if defined(Q_OS_BSD4) inline QStorageIterator::QStorageIterator() @@ -444,10 +455,10 @@ void QStorageInfoPrivate::initRootPath() while (it.next()) { const QString mountDir = it.rootPath(); const QByteArray fsName = it.fileSystemType(); - if (isPseudoFs(mountDir, fsName)) + if (isPseudoFs(it)) continue; // we try to find most suitable entry - if (oldRootPath.startsWith(mountDir) && maxLength < mountDir.length()) { + if (isParentOf(mountDir, oldRootPath) && maxLength < mountDir.length()) { maxLength = mountDir.length(); rootPath = mountDir; device = it.device(); @@ -536,11 +547,10 @@ QList QStorageInfoPrivate::mountedVolumes() QList volumes; while (it.next()) { - const QString mountDir = it.rootPath(); - const QByteArray fsName = it.fileSystemType(); - if (isPseudoFs(mountDir, fsName)) + if (isPseudoFs(it)) continue; + const QString mountDir = it.rootPath(); volumes.append(QStorageInfo(mountDir)); } diff --git a/tests/auto/corelib/io/qstorageinfo/tst_qstorageinfo.cpp b/tests/auto/corelib/io/qstorageinfo/tst_qstorageinfo.cpp index efbcdc78e0..1afcf05135 100644 --- a/tests/auto/corelib/io/qstorageinfo/tst_qstorageinfo.cpp +++ b/tests/auto/corelib/io/qstorageinfo/tst_qstorageinfo.cpp @@ -162,6 +162,7 @@ void tst_QStorageInfo::tempFile() #endif qint64 free = storage1.bytesFree(); + QVERIFY(free != -1); file.write(QByteArray(1024*1024, '1')); file.flush(); @@ -185,6 +186,7 @@ void tst_QStorageInfo::caching() qint64 free = storage1.bytesFree(); QStorageInfo storage2(storage1); QVERIFY(free == storage2.bytesFree()); + QVERIFY(free != -1); file.write(QByteArray(1024*1024, '\0')); file.flush(); diff --git a/tests/manual/manual.pro b/tests/manual/manual.pro index bec098d462..8e77a321dd 100644 --- a/tests/manual/manual.pro +++ b/tests/manual/manual.pro @@ -24,6 +24,7 @@ qnetworkaccessmanager/qget \ qnetworkconfigurationmanager \ qnetworkconfiguration \ qnetworkreply \ +qstorageinfo \ qscreen \ qssloptions \ qsslsocket \ diff --git a/tests/manual/qstorageinfo/main.cpp b/tests/manual/qstorageinfo/main.cpp new file mode 100644 index 0000000000..884e5559ce --- /dev/null +++ b/tests/manual/qstorageinfo/main.cpp @@ -0,0 +1,81 @@ +/**************************************************************************** +** +** Copyright (C) 2016 Intel Corporation +** Contact: http://www.qt.io/licensing/ +** +** This file is part of the test suite of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL21$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see http://www.qt.io/terms-conditions. For further +** information use the contact form at http://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 or version 3 as published by the Free +** Software Foundation and appearing in the file LICENSE.LGPLv21 and +** LICENSE.LGPLv3 included in the packaging of this file. Please review the +** following information to ensure the GNU Lesser General Public License +** requirements will be met: https://www.gnu.org/licenses/lgpl.html and +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** As a special exception, The Qt Company gives you certain additional +** rights. These rights are described in The Qt Company LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include +#include + +#include + +int main(int argc, char *argv[]) +{ + QCoreApplication a(argc, argv); + + QList volumes; + QStringList args = a.arguments(); + args.takeFirst(); // skip application name + + foreach (const QString &path, args) { + QStorageInfo info(path); + if (!info.isValid()) { + // no error string... + fprintf(stderr, "Could not get info on %s\n", qPrintable(path)); + return 1; + } + volumes << info; + } + + if (volumes.isEmpty()) + volumes = QStorageInfo::mountedVolumes(); + + // Sample output: + // Filesystem (Type) Size Available BSize Label Mounted on + // /dev/sda2 (ext4) RO 388480 171218 1024 /boot + // /dev/mapper/system-root (btrfs) RW + // 214958080 39088272 4096 / + // /dev/disk1s2 (hfs) RW 488050672 419909696 4096 Macintosh HD2 /Volumes/Macintosh HD2 + + printf("Filesystem (Type) Size Available BSize Label Mounted on\n"); + foreach (const QStorageInfo &info, volumes) { + const QString fsAndType = info.device() + QLatin1String(" (") + + info.fileSystemType() + QLatin1Char(')'); + + printf("%-19s R%c ", qPrintable(fsAndType), info.isReadOnly() ? 'O' : 'W'); + if (fsAndType.size() > 19) + printf("\n%23s", ""); + + printf("%10llu %10llu %5u ", info.bytesTotal() / 1024, info.bytesFree() / 1024, info.blockSize()); + printf("%-16s %s\n", qPrintable(info.name()), qPrintable(info.rootPath())); + } + + return 0; +} diff --git a/tests/manual/qstorageinfo/qstorageinfo.pro b/tests/manual/qstorageinfo/qstorageinfo.pro new file mode 100644 index 0000000000..25acd24c80 --- /dev/null +++ b/tests/manual/qstorageinfo/qstorageinfo.pro @@ -0,0 +1,4 @@ +QT = core +CONFIG += console +CONFIG -= app_bundle +SOURCES += main.cpp -- cgit v1.2.3