calamares/src/libcalamares/partition/Mount.h
Adriaan de Groot 0070dd2c01 [libcalamares] Add a convenience for reading mtab
- used by umount and cleartempmounts (in future)
2022-01-18 13:22:20 +01:00

113 lines
3.7 KiB
C++

/* === This file is part of Calamares - <https://calamares.io> ===
*
* SPDX-FileCopyrightText: 2014 Teo Mrnjavac <teo@kde.org>
* SPDX-FileCopyrightText: 2017-2019 Adriaan de Groot <groot@kde.org>
* SPDX-License-Identifier: GPL-3.0-or-later
*
* Calamares is Free Software: see the License-Identifier above.
*
*
*/
#ifndef PARTITION_MOUNT_H
#define PARTITION_MOUNT_H
#include "DllMacro.h"
#include <QList>
#include <QString>
#include <QStringList>
#include <memory>
namespace CalamaresUtils
{
namespace Partition
{
/**
* Runs the mount utility with the specified parameters.
* @param devicePath the path of the partition to mount.
* @param mountPoint the full path of the target mount point.
* @param filesystemName the name of the filesystem (optional).
* @param options any additional options as passed to mount -o (optional).
* If @p options starts with a dash (-) then it is passed unchanged
* and no -o option is added; this is used in handling --bind mounts.
* @returns the program's exit code, or:
* Crashed = QProcess crash
* FailedToStart = QProcess cannot start
* NoWorkingDirectory = bad arguments
*/
DLLEXPORT int mount( const QString& devicePath,
const QString& mountPoint,
const QString& filesystemName = QString(),
const QString& options = QString() );
/** @brief Unmount the given @p path (device or mount point).
*
* Runs umount(8) in the host system.
*
* @returns the program's exit code, or special codes like mount().
*/
DLLEXPORT int unmount( const QString& path, const QStringList& options = QStringList() );
/** @brief Mount and automatically unmount a device
*
* The TemporaryMount object mounts a filesystem, and is like calling
* the mount() function, above. When the object is destroyed, unmount()
* is called with suitable options to undo the original mount.
*/
class DLLEXPORT TemporaryMount
{
public:
TemporaryMount( const QString& devicePath,
const QString& filesystemName = QString(),
const QString& options = QString() );
TemporaryMount( const TemporaryMount& ) = delete;
TemporaryMount& operator=( const TemporaryMount& ) = delete;
~TemporaryMount();
bool isValid() const { return bool( m_d ); }
QString path() const;
private:
struct Private;
std::unique_ptr< Private > m_d;
};
/** @brief Information about a mount point from /etc/mtab
*
* Entries in /etc/mtab are of the form: <device> <mountpoint> <other>
* This struct only stores device and mountpoint.
*
* The main way of getting these structs is to call fromMtab() to read
* an /etc/mtab-like file and storing all of the entries from it.
*/
struct DLLEXPORT MtabInfo
{
QString device;
QString mountPoint;
/** @brief Reads an mtab-like file and returns the entries from it
*
* When @p mtabPath is given, that file is read. If the given name is
* empty (e.g. the default) then /etc/mtab is read, instead.
*
* If @p mountPrefix is given, then only entries that have a mount point
* that starts with that prefix are returned.
*/
static QList< MtabInfo > fromMtabFilteredByPrefix( const QString& mountPrefix = QString(),
const QString& mtabPath = QString() );
/// @brief Predicate to sort MtabInfo objects by device-name
static bool deviceOrder( const MtabInfo& a, const MtabInfo& b ) { return a.device > b.device; }
/// @brief Predicate to sort MtabInfo objects by mount-point
static bool mountPointOrder( const MtabInfo& a, const MtabInfo& b ) { return a.mountPoint > b.mountPoint; }
};
} // namespace Partition
} // namespace CalamaresUtils
#endif