TYPE3

[iec.git] / src / type3_AndroidCloud / anbox-master / src / anbox / common / binder_device_allocator.cpp

diff --git a/src/type3_AndroidCloud/anbox-master/src/anbox/common/binder_device_allocator.cpp b/src/type3_AndroidCloud/anbox-master/src/anbox/common/binder_device_allocator.cpp
new file mode 100644 (file)
index 0000000..cb580de
--- /dev/null
+++ b/src/type3_AndroidCloud/anbox-master/src/anbox/common/binder_device_allocator.cpp
@@ -0,0 +1,84 @@
+/*
+ * Copyright (C) 2018 Canonical Ltd.
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 3, as published
+ * by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranties of
+ * MERCHANTABILITY, SATISFACTORY QUALITY, 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "anbox/common/binder_device_allocator.h"
+#include "anbox/common/binder_device.h"
+#include "anbox/common/binderfs.h"
+#include "anbox/defer_action.h"
+#include "anbox/logger.h"
+#include "anbox/utils.h"
+
+#include <boost/filesystem.hpp>
+
+#include <cerrno>
+#include <fcntl.h>
+#include <linux/loop.h>
+#include <sys/ioctl.h>
+
+#include <system_error>
+
+namespace fs = boost::filesystem;
+
+namespace {
+const constexpr char* binderfs_base_path{BINDERFS_PATH};
+const constexpr char* binderfs_control_path{BINDERFS_PATH "/binder-control"};
+const constexpr char* default_binder_device_name{"binder"};
+} // namespace
+
+namespace anbox {
+namespace common {
+bool BinderDeviceAllocator::is_supported() {
+  return fs::exists(binderfs_control_path);
+}
+
+std::unique_ptr<BinderDevice> BinderDeviceAllocator::new_device() {
+  static uint32_t next_id = 0;
+
+  const auto ctl_fd = ::open(binderfs_control_path, O_RDWR);
+  if (ctl_fd < 0) {
+    ERROR("Failed to access binder control: %s", std::strerror(errno));
+    return nullptr;
+  }
+
+  DeferAction close_ctl_fd{[&]() { ::close(ctl_fd); }};
+
+  binderfs_device dev;
+  std::memset(&dev, 0, sizeof(binderfs_device));
+
+  const auto device_name = utils::string_format("%s%d", default_binder_device_name, next_id++);
+  if (device_name.length() > BINDERFS_MAX_NAME) {
+    ERROR("Invalid binder device name: %s", device_name);
+    return nullptr;
+  }
+
+  std::memcpy(dev.name, device_name.c_str(),  device_name.length());
+
+  if (::ioctl(ctl_fd, BINDER_CTL_ADD, &dev) < 0) {
+    ERROR("Failed to allocate new binder node: %s", std::strerror(errno));
+    return nullptr;
+  }
+
+  const auto path = utils::string_format("%s/%s", binderfs_base_path,  device_name);
+  if (!fs::exists(path)) {
+    ERROR("Allocated binder device %s is missing", path);
+    return nullptr;
+  }
+
+  return BinderDevice::create(path);
+}
+} // namespace common
+} // namespace anbox