From 108ce38443eda81032b72e81202237da53f922e8 Mon Sep 17 00:00:00 2001 From: Vincent Bénony Date: Tue, 1 Dec 2015 18:53:52 +0100 Subject: IOS: Added a chroot like filesystem This is needed because it is not possible to keep absolute paths to the iOS document directory, because a part of its name change between each installation / update. --- backends/fs/chroot/chroot-fs-factory.cpp | 60 +++++++++++++++++ backends/fs/chroot/chroot-fs-factory.h | 41 ++++++++++++ backends/fs/chroot/chroot-fs.cpp | 111 +++++++++++++++++++++++++++++++ backends/fs/chroot/chroot-fs.h | 54 +++++++++++++++ 4 files changed, 266 insertions(+) create mode 100644 backends/fs/chroot/chroot-fs-factory.cpp create mode 100644 backends/fs/chroot/chroot-fs-factory.h create mode 100644 backends/fs/chroot/chroot-fs.cpp create mode 100644 backends/fs/chroot/chroot-fs.h (limited to 'backends/fs/chroot') diff --git a/backends/fs/chroot/chroot-fs-factory.cpp b/backends/fs/chroot/chroot-fs-factory.cpp new file mode 100644 index 0000000000..4030f4f502 --- /dev/null +++ b/backends/fs/chroot/chroot-fs-factory.cpp @@ -0,0 +1,60 @@ +/* ScummVM - Graphic Adventure Engine + * + * ScummVM is the legal property of its developers, whose names + * are too numerous to list here. Please refer to the COPYRIGHT + * file distributed with this source distribution. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + */ + +#if defined(POSIX) + +#define FORBIDDEN_SYMBOL_EXCEPTION_time_h +#define FORBIDDEN_SYMBOL_EXCEPTION_unistd_h +#define FORBIDDEN_SYMBOL_EXCEPTION_mkdir +#define FORBIDDEN_SYMBOL_EXCEPTION_exit //Needed for IRIX's unistd.h + +#include "chroot-fs-factory.h" +#include "backends/fs/chroot/chroot-fs.h" +#include "backends/fs/posix/posix-fs-factory.h" + +ChRootFilesystemFactory::ChRootFilesystemFactory(Common::String root) { + _root = root; +} + +AbstractFSNode *ChRootFilesystemFactory::makeRootFileNode() const { + return new ChRootFilesystemNode(_root, "/"); +} + +AbstractFSNode *ChRootFilesystemFactory::makeCurrentDirectoryFileNode() const { + char buf[MAXPATHLEN]; + if (getcwd(buf, MAXPATHLEN) == NULL) { + return NULL; + } + + if (Common::String(buf).hasPrefix(_root + Common::String("/"))) { + return new ChRootFilesystemNode(_root, buf + _root.size()); + } + + return new ChRootFilesystemNode(_root, "/"); +} + +AbstractFSNode *ChRootFilesystemFactory::makeFileNodePath(const Common::String &path) const { + assert(!path.empty()); + return new ChRootFilesystemNode(_root, path); +} + +#endif diff --git a/backends/fs/chroot/chroot-fs-factory.h b/backends/fs/chroot/chroot-fs-factory.h new file mode 100644 index 0000000000..2c05107b0f --- /dev/null +++ b/backends/fs/chroot/chroot-fs-factory.h @@ -0,0 +1,41 @@ +/* ScummVM - Graphic Adventure Engine + * + * ScummVM is the legal property of its developers, whose names + * are too numerous to list here. Please refer to the COPYRIGHT + * file distributed with this source distribution. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + */ + +#ifndef CHROOT_FS_FACTORY_H +#define CHROOT_FS_FACTORY_H + +#include "backends/fs/fs-factory.h" + +class ChRootFilesystemFactory : public FilesystemFactory { +private: + Common::String _root; + +protected: + virtual AbstractFSNode *makeRootFileNode() const; + virtual AbstractFSNode *makeCurrentDirectoryFileNode() const; + virtual AbstractFSNode *makeFileNodePath(const Common::String &path) const; + +public: + ChRootFilesystemFactory(Common::String root); +}; + +#endif /* CHROOT_FS_FACTORY_H */ diff --git a/backends/fs/chroot/chroot-fs.cpp b/backends/fs/chroot/chroot-fs.cpp new file mode 100644 index 0000000000..1a2bc4c087 --- /dev/null +++ b/backends/fs/chroot/chroot-fs.cpp @@ -0,0 +1,111 @@ +/* ScummVM - Graphic Adventure Engine + * + * ScummVM is the legal property of its developers, whose names + * are too numerous to list here. Please refer to the COPYRIGHT + * file distributed with this source distribution. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + */ + +#if defined(POSIX) + +// Re-enable some forbidden symbols to avoid clashes with stat.h and unistd.h. +// Also with clock() in sys/time.h in some Mac OS X SDKs. +#define FORBIDDEN_SYMBOL_EXCEPTION_time_h +#define FORBIDDEN_SYMBOL_EXCEPTION_unistd_h +#define FORBIDDEN_SYMBOL_EXCEPTION_mkdir +#define FORBIDDEN_SYMBOL_EXCEPTION_getenv +#define FORBIDDEN_SYMBOL_EXCEPTION_exit //Needed for IRIX's unistd.h + +#include "backends/fs/chroot/chroot-fs.h" + +ChRootFilesystemNode::ChRootFilesystemNode(const Common::String &root, POSIXFilesystemNode *node) { + _root = Common::normalizePath(root, '/'); + _realNode = node; +} + +ChRootFilesystemNode::ChRootFilesystemNode(const Common::String &root, const Common::String &path) { + _root = Common::normalizePath(root, '/'); + _realNode = new POSIXFilesystemNode(root.stringByAppendingPathComponent(path)); +} + +ChRootFilesystemNode::~ChRootFilesystemNode() { + delete _realNode; +} + +bool ChRootFilesystemNode::exists() const { + return _realNode->exists(); +} + +Common::String ChRootFilesystemNode::getDisplayName() const { + return getName(); +} + +Common::String ChRootFilesystemNode::getName() const { + return _realNode->AbstractFSNode::getDisplayName(); +} + +Common::String ChRootFilesystemNode::getPath() const { + Common::String path = _realNode->getPath(); + if (path.size() > _root.size()) { + return Common::String(path.c_str() + _root.size()); + } + return Common::String("/"); +} + +bool ChRootFilesystemNode::isDirectory() const { + return _realNode->isDirectory(); +} + +bool ChRootFilesystemNode::isReadable() const { + return _realNode->isReadable(); +} + +bool ChRootFilesystemNode::isWritable() const { + return _realNode->isWritable(); +} + +AbstractFSNode *ChRootFilesystemNode::getChild(const Common::String &n) const { + return new ChRootFilesystemNode(_root, (POSIXFilesystemNode *) _realNode->getChild(n)); +} + +bool ChRootFilesystemNode::getChildren(AbstractFSList &list, ListMode mode, bool hidden) const { + AbstractFSList tmp; + if (!_realNode->getChildren(tmp, mode, hidden)) { + return false; + } + + for (AbstractFSList::iterator i=tmp.begin(); i!=tmp.end(); ++i) { + list.push_back(new ChRootFilesystemNode(_root, (POSIXFilesystemNode *) *i)); + } + + return true; +} + +AbstractFSNode *ChRootFilesystemNode::getParent() const { + if (getPath() == "/") return 0; + return new ChRootFilesystemNode(_root, (POSIXFilesystemNode *) _realNode->getParent()); +} + +Common::SeekableReadStream *ChRootFilesystemNode::createReadStream() { + return _realNode->createReadStream(); +} + +Common::WriteStream *ChRootFilesystemNode::createWriteStream() { + return _realNode->createWriteStream(); +} + +#endif diff --git a/backends/fs/chroot/chroot-fs.h b/backends/fs/chroot/chroot-fs.h new file mode 100644 index 0000000000..7dd62cb9a8 --- /dev/null +++ b/backends/fs/chroot/chroot-fs.h @@ -0,0 +1,54 @@ +/* ScummVM - Graphic Adventure Engine + * + * ScummVM is the legal property of its developers, whose names + * are too numerous to list here. Please refer to the COPYRIGHT + * file distributed with this source distribution. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + */ + +#ifndef CHROOT_FS_H +#define CHROOT_FS_H + +#include "backends/fs/posix/posix-fs.h" + +class ChRootFilesystemNode : public AbstractFSNode { + Common::String _root; + POSIXFilesystemNode *_realNode; + + ChRootFilesystemNode(const Common::String &root, POSIXFilesystemNode *); + +public: + ChRootFilesystemNode(const Common::String &root, const Common::String &path); + virtual ~ChRootFilesystemNode(); + + virtual bool exists() const; + virtual Common::String getDisplayName() const; + virtual Common::String getName() const; + virtual Common::String getPath() const; + virtual bool isDirectory() const; + virtual bool isReadable() const; + virtual bool isWritable() const; + + virtual AbstractFSNode *getChild(const Common::String &n) const; + virtual bool getChildren(AbstractFSList &list, ListMode mode, bool hidden) const; + virtual AbstractFSNode *getParent() const; + + virtual Common::SeekableReadStream *createReadStream(); + virtual Common::WriteStream *createWriteStream(); +}; + +#endif /* CHROOT_FS_H */ -- cgit v1.2.3