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45 lines
1.4 KiB
45 lines
1.4 KiB
// Copyright 2019 The Chromium OS Authors. All rights reserved.
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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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#ifndef LIBBRILLO_BRILLO_SCOPED_MOUNT_NAMESPACE_H_
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#define LIBBRILLO_BRILLO_SCOPED_MOUNT_NAMESPACE_H_
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#include <memory>
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#include <base/macros.h>
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#include <base/files/file_path.h>
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#include <base/files/scoped_file.h>
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#include <brillo/brillo_export.h>
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namespace brillo {
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// A class that restores a mount namespace when it goes out of scope. This can
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// be done by entering another process' mount namespace by using
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// CreateForPid(), or by supplying a mount namespace FD directly.
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class BRILLO_EXPORT ScopedMountNamespace {
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public:
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// Enters the process identified by |pid|'s mount namespace and returns a
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// unique_ptr that restores the original mount namespace when it goes out of
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// scope.
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static std::unique_ptr<ScopedMountNamespace> CreateForPid(pid_t pid);
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// Enters the mount namespace identified by |path| and returns a unique_ptr
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// that restores the original mount namespace when it goes out of scope.
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static std::unique_ptr<ScopedMountNamespace> CreateFromPath(
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const base::FilePath& ns_path);
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explicit ScopedMountNamespace(base::ScopedFD mount_namespace_fd);
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~ScopedMountNamespace();
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private:
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base::ScopedFD mount_namespace_fd_;
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DISALLOW_COPY_AND_ASSIGN(ScopedMountNamespace);
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};
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} // namespace brillo
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#endif // LIBBRILLO_BRILLO_SCOPED_MOUNT_NAMESPACE_H_
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