[NETD-BPF#1] Move libnetdutils to frameworks/libs/net/...
libnetdutils is referenced by netd.c and TrafficController.cpp, which
are going to be mainlined. Therefore, move libnetdutils to a common
place where both mainline module and platform code (Netd) can refer to.
Bug: 202086915
Test: build; flash; cd system/netd; atest
Ignore-AOSP-First: the netd change(same topic) would not automerge from
aosp.
No-Typo-Check: Clean code move with no other changes.
BYPASS_INCLUSIVE_LANGUAGE_REASON=Clean code move with no other changes.
Change-Id: I645bfe35f6543149c9a9f894cd4158d27a481abe
diff --git a/staticlibs/netd/libnetdutils/UniqueFd.cpp b/staticlibs/netd/libnetdutils/UniqueFd.cpp
new file mode 100644
index 0000000..1cb30ed
--- /dev/null
+++ b/staticlibs/netd/libnetdutils/UniqueFd.cpp
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <algorithm>
+
+#include "netdutils/UniqueFd.h"
+#include "netdutils/Syscalls.h"
+
+namespace android {
+namespace netdutils {
+
+void UniqueFd::reset(Fd fd) {
+ auto& sys = sSyscalls.get();
+ std::swap(fd, mFd);
+ if (isWellFormed(fd)) {
+ expectOk(sys.close(fd));
+ }
+}
+
+std::ostream& operator<<(std::ostream& os, const UniqueFd& fd) {
+ return os << "UniqueFd[" << static_cast<Fd>(fd) << "]";
+}
+
+} // namespace netdutils
+} // namespace android