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.

1 files changed, 60 insertions, 0 deletions

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