Parse and expose end-of-life flag.
Omaha update or noupdate response can include _key=value pairs with
arbitrary data. One of those key can be "_eol" with the one of the
values "supported", "security-only" or "eol" which notifies the device
the end-of-life status of the device with respect to updates. This
information is now exposed via GetEolStatus() to the client so it
can be properly displayed in the UI.
Bug: 27924505
TEST=Added unittest. Run `update_engine_client --eol_status` on link.
Change-Id: Icc15f25b4d0b19cc894f5afc52ac7c43c7818982
diff --git a/omaha_utils.h b/omaha_utils.h
new file mode 100644
index 0000000..8614540
--- /dev/null
+++ b/omaha_utils.h
@@ -0,0 +1,40 @@
+//
+// Copyright (C) 2016 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.
+//
+
+#ifndef UPDATE_ENGINE_OMAHA_UTILS_H_
+#define UPDATE_ENGINE_OMAHA_UTILS_H_
+
+#include <string>
+
+namespace chromeos_update_engine {
+
+// The end-of-life status of the device.
+enum class EolStatus {
+ kSupported = 0,
+ kSecurityOnly,
+ kEol,
+};
+
+// Returns the string representation of the |eol_status|.
+const char* EolStatusToString(EolStatus eol_status);
+
+// Converts the end-of-life status string to an EolStatus numeric value. In case
+// of an invalid string, the default "supported" value will be used instead.
+EolStatus StringToEolStatus(const std::string& eol_status);
+
+} // namespace chromeos_update_engine
+
+#endif // UPDATE_ENGINE_OMAHA_UTILS_H_