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51 lines
1.6 KiB
C++
51 lines
1.6 KiB
C++
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// Copyright 2017 The Chromium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/scoped_environment_variable_override.h"
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#include "base/environment.h"
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namespace base {
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ScopedEnvironmentVariableOverride::ScopedEnvironmentVariableOverride(
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const std::string& variable_name,
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const std::string& value,
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bool unset_var)
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: environment_(Environment::Create()),
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variable_name_(variable_name),
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overridden_(false),
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was_set_(false) {
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was_set_ = environment_->GetVar(variable_name, &old_value_);
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if (unset_var)
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overridden_ = environment_->UnSetVar(variable_name);
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else
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overridden_ = environment_->SetVar(variable_name, value);
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}
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ScopedEnvironmentVariableOverride::ScopedEnvironmentVariableOverride(
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const std::string& variable_name,
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const std::string& value)
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: ScopedEnvironmentVariableOverride(variable_name, value, false) {}
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ScopedEnvironmentVariableOverride::ScopedEnvironmentVariableOverride(
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const std::string& variable_name)
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: ScopedEnvironmentVariableOverride(variable_name, "", true) {}
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ScopedEnvironmentVariableOverride::ScopedEnvironmentVariableOverride(
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ScopedEnvironmentVariableOverride&&) = default;
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ScopedEnvironmentVariableOverride& ScopedEnvironmentVariableOverride::operator=(
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ScopedEnvironmentVariableOverride&&) = default;
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ScopedEnvironmentVariableOverride::~ScopedEnvironmentVariableOverride() {
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if (environment_ && overridden_) {
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if (was_set_)
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environment_->SetVar(variable_name_, old_value_);
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else
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environment_->UnSetVar(variable_name_);
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}
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}
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} // namespace base
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