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/*
* Copyright (C) 2021 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 "perfetto/ext/base/android_utils.h"
#include "perfetto/base/build_config.h"
#include <string>
#if PERFETTO_BUILDFLAG(PERFETTO_OS_ANDROID)
#include <sys/system_properties.h>
#endif
#include "perfetto/base/compiler.h"
#include "perfetto/base/logging.h"
namespace perfetto {
namespace base {
#if PERFETTO_BUILDFLAG(PERFETTO_OS_ANDROID)
std::string GetAndroidProp(const char* name) {
std::string ret;
#if __ANDROID_API__ >= 26
const prop_info* pi = __system_property_find(name);
if (!pi) {
return ret;
}
__system_property_read_callback(
pi,
[](void* dst_void, const char*, const char* value, uint32_t) {
std::string& dst = *static_cast<std::string*>(dst_void);
dst = value;
},
&ret);
#else // __ANDROID_API__ < 26
char value_buf[PROP_VALUE_MAX];
int len = __system_property_get(name, value_buf);
if (len > 0 && static_cast<size_t>(len) < sizeof(value_buf)) {
ret = std::string(value_buf, static_cast<size_t>(len));
}
#endif
return ret;
}
#endif // PERFETTO_BUILDFLAG(PERFETTO_OS_ANDROID)
} // namespace base
} // namespace perfetto
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