diff options
| -rw-r--r-- | src/corelib/io/qstorageinfo_unix.cpp | 44 |
1 files changed, 30 insertions, 14 deletions
diff --git a/src/corelib/io/qstorageinfo_unix.cpp b/src/corelib/io/qstorageinfo_unix.cpp index 0daf041954..ae5c42ffd1 100644 --- a/src/corelib/io/qstorageinfo_unix.cpp +++ b/src/corelib/io/qstorageinfo_unix.cpp @@ -1,6 +1,7 @@ /**************************************************************************** ** ** Copyright (C) 2014 Ivan Komissarov <ABBAPOH@gmail.com> +** Copyright (C) 2016 Intel Corporation. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the QtCore module of the Qt Toolkit. @@ -153,29 +154,41 @@ static bool isParentOf(const String &parent, const QString &dirName) parent.size() == 1); } -static bool isPseudoFs(const QStorageIterator &it) -{ +static bool shouldIncludeFs(const QStorageIterator &it) +{ + /* + * 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). + */ + 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; + return false; } - QByteArray type = it.fileSystemType(); - if (type == "tmpfs") +#ifdef Q_OS_LINUX + if (it.fileSystemType() == "rootfs") return false; -#if defined(Q_OS_LINUX) - if (type == "rootfs" || type == "rpc_pipefs") - return true; #endif - if (!it.device().startsWith('/')) - return true; - - return false; + // size checking in mountedVolumes() + return true; } #if defined(Q_OS_BSD4) @@ -557,11 +570,14 @@ QList<QStorageInfo> QStorageInfoPrivate::mountedVolumes() QList<QStorageInfo> volumes; while (it.next()) { - if (isPseudoFs(it)) + if (!shouldIncludeFs(it)) continue; const QString mountDir = it.rootPath(); - volumes.append(QStorageInfo(mountDir)); + QStorageInfo info(mountDir); + if (info.bytesTotal() == 0) + continue; + volumes.append(info); } return volumes; |