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.cpp | 111 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 111 insertions(+)
 create mode 100644 backends/fs/chroot/chroot-fs.cpp

(limited to 'backends/fs/chroot/chroot-fs.cpp')

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
-- 
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