/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ART_LIBARTBASE_BASE_FILE_UTILS_H_
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#define ART_LIBARTBASE_BASE_FILE_UTILS_H_
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#include <stdlib.h>
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#include <string>
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#include <android-base/logging.h>
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#include "arch/instruction_set.h"
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namespace art {
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bool ReadFileToString(const std::string& file_name, std::string* result);
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// Find $ANDROID_ROOT, /system, or abort.
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std::string GetAndroidRoot();
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// Find $ANDROID_ROOT, /system, or return an empty string.
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std::string GetAndroidRootSafe(/*out*/ std::string* error_msg);
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// Find $ANDROID_RUNTIME_ROOT, /apex/com.android.runtime, or abort.
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std::string GetAndroidRuntimeRoot();
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// Find $ANDROID_RUNTIME_ROOT, /apex/com.android.runtime, or return an empty string.
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std::string GetAndroidRuntimeRootSafe(/*out*/ std::string* error_msg);
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// Find $ANDROID_DATA, /data, or abort.
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std::string GetAndroidData();
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// Find $ANDROID_DATA, /data, or return an empty string.
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std::string GetAndroidDataSafe(/*out*/ std::string* error_msg);
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// Returns the default boot image location (ANDROID_ROOT/framework/boot.art).
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// Returns an empty string if ANDROID_ROOT is not set.
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std::string GetDefaultBootImageLocation(std::string* error_msg);
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// Returns the default boot image location, based on the passed android root.
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std::string GetDefaultBootImageLocation(const std::string& android_root);
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// Returns the dalvik-cache location, with subdir appended. Returns the empty string if the cache
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// could not be found.
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std::string GetDalvikCache(const char* subdir);
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// Return true if we found the dalvik cache and stored it in the dalvik_cache argument.
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// have_android_data will be set to true if we have an ANDROID_DATA that exists,
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// dalvik_cache_exists will be true if there is a dalvik-cache directory that is present.
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// The flag is_global_cache tells whether this cache is /data/dalvik-cache.
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void GetDalvikCache(const char* subdir, bool create_if_absent, std::string* dalvik_cache,
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bool* have_android_data, bool* dalvik_cache_exists, bool* is_global_cache);
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// Returns the absolute dalvik-cache path for a DexFile or OatFile. The path returned will be
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// rooted at cache_location.
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bool GetDalvikCacheFilename(const char* file_location, const char* cache_location,
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std::string* filename, std::string* error_msg);
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// Returns the system location for an image
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std::string GetSystemImageFilename(const char* location, InstructionSet isa);
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// Returns the vdex filename for the given oat filename.
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std::string GetVdexFilename(const std::string& oat_filename);
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// Returns `filename` with the text after the last occurrence of '.' replaced with
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// `extension`. If `filename` does not contain a period, returns a string containing `filename`,
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// a period, and `new_extension`.
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// Example: ReplaceFileExtension("foo.bar", "abc") == "foo.abc"
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// ReplaceFileExtension("foo", "abc") == "foo.abc"
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std::string ReplaceFileExtension(const std::string& filename, const std::string& new_extension);
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// Return whether the location is on /apex/com.android.runtime
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bool LocationIsOnRuntimeModule(const char* location);
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// Return whether the location is on /apex/com.android.conscrypt
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bool LocationIsOnConscryptModule(const char* location);
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// Return whether the location is on system (i.e. android root).
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bool LocationIsOnSystem(const char* location);
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// Return whether the location is on system/framework (i.e. android_root/framework).
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bool LocationIsOnSystemFramework(const char* location);
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// Return whether the location is on /apex/.
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bool LocationIsOnApex(const char* location);
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// Compare the runtime module root against android root. Returns true if they are
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// both known and distinct. This is meant to be a proxy for 'running with apex'.
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bool RuntimeModuleRootDistinctFromAndroidRoot();
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// dup(2), except setting the O_CLOEXEC flag atomically, when possible.
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int DupCloexec(int fd);
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// Returns true if `path` begins with a slash.
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inline bool IsAbsoluteLocation(const std::string& path) { return !path.empty() && path[0] == '/'; }
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} // namespace art
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#endif // ART_LIBARTBASE_BASE_FILE_UTILS_H_
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