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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef SANDBOX_LINUX_SERVICES_SCOPED_PROCESS_H_
#define SANDBOX_LINUX_SERVICES_SCOPED_PROCESS_H_
#include "base/functional/callback_forward.h"
#include "base/process/process_handle.h"
#include "sandbox/sandbox_export.h"
namespace sandbox {
// fork() a child process that will run a Closure.
// After the Closure has run, the child will pause forever. If this object
// is detroyed, the child will be destroyed, even if the closure did not
// finish running. It's ok to signal the child from outside of this class to
// destroy it.
// This class cannot be instanciated from a multi-threaded process, as it needs
// to fork().
class SANDBOX_EXPORT ScopedProcess {
public:
// A new process will be created and |child_callback| will run in the child
// process. This callback is allowed to terminate the process or to simply
// return. If the callback returns, the process will wait forever.
explicit ScopedProcess(base::OnceClosure child_callback);
ScopedProcess(const ScopedProcess&) = delete;
ScopedProcess& operator=(const ScopedProcess&) = delete;
~ScopedProcess();
// Wait for the process to exit.
// |got_signaled| tells how to interpret the return value: either as an exit
// code, or as a signal number.
// When this returns, the process will still not have been reaped and will
// survive as a zombie for the lifetime of this object. This method can be
// called multiple times.
int WaitForExit(bool* got_signaled);
// Wait for the |child_callback| passed at construction to run. Return false
// if |child_callback| did not finish running and we know it never will (for
// instance the child crashed or used _exit()).
bool WaitForClosureToRun();
base::ProcessId GetPid() { return child_process_id_; }
private:
bool IsOriginalProcess();
base::ProcessId child_process_id_;
base::ProcessId process_id_;
int pipe_fds_[2];
};
} // namespace sandbox
#endif // SANDBOX_LINUX_SERVICES_SCOPED_PROCESS_H_
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