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-rw-r--r--otautil/include/otautil/cache_location.h69
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diff --git a/otautil/include/otautil/cache_location.h b/otautil/include/otautil/cache_location.h
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+/*
+ * Copyright (C) 2018 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 _OTAUTIL_OTAUTIL_CACHE_LOCATION_H_
+#define _OTAUTIL_OTAUTIL_CACHE_LOCATION_H_
+
+#include <string>
+
+#include "android-base/macros.h"
+
+// A singleton class to maintain the update related locations. The locations should be only set
+// once at the start of the program.
+class CacheLocation {
+ public:
+ static CacheLocation& location();
+
+ // getter and setter functions.
+ std::string cache_temp_source() const {
+ return cache_temp_source_;
+ }
+ void set_cache_temp_source(const std::string& temp_source) {
+ cache_temp_source_ = temp_source;
+ }
+
+ std::string last_command_file() const {
+ return last_command_file_;
+ }
+ void set_last_command_file(const std::string& last_command) {
+ last_command_file_ = last_command;
+ }
+
+ std::string stash_directory_base() const {
+ return stash_directory_base_;
+ }
+ void set_stash_directory_base(const std::string& base) {
+ stash_directory_base_ = base;
+ }
+
+ private:
+ CacheLocation();
+ DISALLOW_COPY_AND_ASSIGN(CacheLocation);
+
+ // When there isn't enough room on the target filesystem to hold the patched version of the file,
+ // we copy the original here and delete it to free up space. If the expected source file doesn't
+ // exist, or is corrupted, we look to see if the cached file contains the bits we want and use it
+ // as the source instead. The default location for the cached source is "/cache/saved.file".
+ std::string cache_temp_source_;
+
+ // Location to save the last command that stashes blocks.
+ std::string last_command_file_;
+
+ // The base directory to write stashes during update.
+ std::string stash_directory_base_;
+};
+
+#endif // _OTAUTIL_OTAUTIL_CACHE_LOCATION_H_