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+// Copyright 2014 The Chromium Authors. All rights reserved.
+// 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/basictypes.h"
+#include "base/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(const base::Closure& child_callback);
+ ~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];
+ DISALLOW_COPY_AND_ASSIGN(ScopedProcess);
+};
+
+} // namespace sandbox
+
+#endif // SANDBOX_LINUX_SERVICES_SCOPED_PROCESS_H_