quickmod/FuseMounter/fusesandbox.cpp

#include <QDir>
#include <QFileInfo>

#include <fcntl.h>           /* Definition of AT_* constants */
#include <sys/stat.h>

#include "fuseinterface.h"
#include "fusesandbox.h"

FuseAccessorSandbox::FuseAccessorSandbox(FuseInterface *parent, const QString &resource)
    : FuseAccessorProxy(parent, resource, FuseAccessorBase::FH_SANDBOX)
{
    //m_resource = m_resource + QDir::separator() + QString::number(parent->getProfileId());
}

FuseAccessorSandbox::~FuseAccessorSandbox()
{
}

FuseFHBase *FuseAccessorSandbox::open(const QString &path, QIODeviceBase::OpenMode mode)
{
    QString qpath = m_resource + QDir::separator() + resolvePath( m_resource, path );

    QFileInfo fi(qpath);
    if( !fi.exists() ) {
        if( mode & QIODeviceBase::ReadOnly ) {
            //qDebug() << "FuseAccessorSandbox::open:" << path << mode << "- Nah. You get null.";
            return NULL;
        }

        QStringList parts = qpath.split( QDir::separator() );
        QString dname = parts.takeLast();
        if( dname.isEmpty() )
            dname = parts.takeLast();

        QDir dir( m_resource );
        dir.mkpath( parts.join(QDir::separator()) );
    }

    FuseFHSandbox *f = new FuseFHSandbox(this, path, qpath);
    if( !f->open(mode) )
    {
        qDebug() << "FuseAccessorSandbox::open:" << path << mode << "- Open failed. You get null:" << qpath;
        f->deleteLater();
        return NULL;
    }

    //m_open_handles.insert( path, f );
    return f;
}

int FuseAccessorSandbox::truncate(const QString &path, off_t offset)
{
    QString qpath = m_resource + QDir::separator() + resolvePath( m_resource, path );
    qDebug() << "FuseAccessorSandbox::truncate:" << path << "@" << offset;
    return QFile::resize(qpath, offset) ? 0 : 1;
}
/*
int FuseAccessorSandbox::rename(const QString &path, const QString &newname)
{
    return 1;
}
*/
int FuseAccessorSandbox::rmdir(const QString &path)
{
    QString qpath = m_resource + QDir::separator() + resolvePath( m_resource, path );
    QStringList parts = qpath.split( QDir::separator(), Qt::SkipEmptyParts );
    QString dname = parts.takeLast();
    if( dname.isEmpty() )
        dname = parts.takeLast();

    QString parentDir = QDir::separator() + parts.join(QDir::separator());
    QDir dir( parentDir );

    //qDebug() << "rmdir:" << dname << "from" << parentDir;
    return dir.rmdir(dname) ? 0 : 1;
}

int FuseAccessorSandbox::unlink(const QString &path)
{
    QString qpath = m_resource + QDir::separator() + resolvePath( m_resource, path );
    QStringList parts = qpath.split( QDir::separator() );
    QString fname = parts.takeLast();
    if( fname.isEmpty() )
        fname = parts.takeLast();

    QDir dir( parts.join(QDir::separator()) );

    qDebug() << "FuseAccessorSandbox::unlink:" << path;
    return dir.remove(fname) ? 0 : 1;
}

int FuseAccessorSandbox::mkdir(const QString &path, QFileDevice::Permissions mode)
{
    Q_UNUSED(mode)

    QString qpath = resolvePath(m_resource, path);
    QDir dir( m_resource );

    qDebug() << "FuseAccessorSandbox::mkdir:" << path << mode << "=>" << m_resource << qpath;
    if( !dir.mkpath(qpath) )
        return 1;
    return 0;
}

int FuseAccessorSandbox::create(const QString &path, QFileDevice::Permissions mode)
{
    Q_UNUSED(mode)

    QString qpath = m_resource + QDir::separator() + resolvePath( m_resource, path );

    QStringList parts = qpath.split( QDir::separator() );
    QString dname = parts.takeLast();
    if( dname.isEmpty() )
        dname = parts.takeLast();

    QDir dir( m_resource );
    dir.mkpath( parts.join(QDir::separator()) );

    mode_t smode = S_IFREG | S_IRWXU | S_IRWXG | S_IRWXO;
    //smode += m_parent->utilQPermsToMode(mode);

    // TODO: Maybe just open it right here?
    qDebug() << "FuseAccessorSandbox::create:" << path << mode;
    int fd = ::creat(qpath.toStdString().c_str(), smode);
    if( fd > 0 )
        close(fd);
    return fd > 0 ? 0 : 1;
}

FuseFHBase *FuseAccessorSandbox::makeWritableFromSource(const QString &source, const QString &origpath, const QString &dest, QIODeviceBase::OpenMode mode)
{
    QString qdest = m_resource + QDir::separator() + resolvePath(m_resource, dest);

    QFileInfo qsf(source);
    if( !qsf.exists() ) {
        qWarning() << "FuseAccessorSandbox::makeWritableFromSource: Couldn't access file at" << source;
        return NULL;
    }

    QStringList parts = dest.toLower().split(QDir::separator(), Qt::SkipEmptyParts);
    QString dfname = parts.takeLast();
    QDir ddir(m_resource);
    ddir.mkpath( parts.join(QDir::separator()) );
    QFile::copy(source, qdest);

    qDebug() << "FuseAccessorSandbox::makeWritableFromSource: cp" << source << qdest;
    FuseFHSandbox *ent = new FuseFHSandbox(this, origpath, qdest);
    if( !ent->open(mode) )
    {
        ent->deleteLater();
        return NULL;
    }

    return ent;
}

FuseFHBase *FuseAccessorSandbox::makeWritableFromData(const QByteArray &source, const QString &origpath, const QString &dest, QIODeviceBase::OpenMode mode)
{
    QString qdest = m_resource + QDir::separator() + resolvePath(m_resource, dest);

    QStringList parts = dest.toLower().split(QDir::separator(), Qt::SkipEmptyParts);
    QString dfname = parts.takeLast();
    QDir ddir(m_resource);
    ddir.mkpath( parts.join(QDir::separator()) );

    qDebug() << "FuseAccessorSandbox::makeWritableFromData:" << qdest << mode;
    QFile f(qdest);
    if( !f.open(QIODeviceBase::WriteOnly) ) {
        qDebug() << "FuseAccessorSandbox::makeWritableFromData: open failed.";
        return NULL;
    }
    f.write(source);
    f.close();

    FuseFHSandbox *ent = new FuseFHSandbox(this, origpath, qdest);
    if( !ent->open(mode) )
    {
        ent->deleteLater();
        return NULL;
    }

    return ent;
}

FuseFHSandbox::FuseFHSandbox(FuseAccessorSandbox *parent, const QString &path, const QString &newpath)
        : FuseFHProxy(parent, path, newpath)
{
}

FuseFHSandbox::~FuseFHSandbox()
{
}

int FuseFHSandbox::write(const QByteArray &data, off_t offset, fuse_file_info *fi)
{
    Q_UNUSED(fi)

    m_file.seek(offset);
    return m_file.write(data);
}