48 lines
1.3 KiB
C++
48 lines
1.3 KiB
C++
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// Copyright 2020 The Crashpad Authors. All rights reserved.
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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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#include "util/mac/sysctl.h"
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#include <errno.h>
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#include <sys/sysctl.h>
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#include <sys/types.h>
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#include "base/check_op.h"
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#include "base/logging.h"
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namespace crashpad {
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std::string ReadStringSysctlByName(const char* name, bool may_log_enoent) {
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size_t buf_len;
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if (sysctlbyname(name, nullptr, &buf_len, nullptr, 0) != 0) {
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PLOG_IF(WARNING, may_log_enoent || errno != ENOENT)
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<< "sysctlbyname (size) " << name;
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return std::string();
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}
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DCHECK_GE(buf_len, 1u);
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std::string value(buf_len - 1, '\0');
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if (sysctlbyname(name, &value[0], &buf_len, nullptr, 0) != 0) {
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PLOG(WARNING) << "sysctlbyname " << name;
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return std::string();
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}
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DCHECK_EQ(value[buf_len - 1], '\0');
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return value;
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}
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} // namespace crashpad
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