1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef SANDBOX_LINUX_SERVICES_SCOPED_PROCESS_H_ 6 #define SANDBOX_LINUX_SERVICES_SCOPED_PROCESS_H_ 7 8 #include "base/callback_forward.h" 9 #include "base/macros.h" 10 #include "base/process/process_handle.h" 11 #include "sandbox/sandbox_export.h" 12 13 namespace sandbox { 14 15 // fork() a child process that will run a Closure. 16 // After the Closure has run, the child will pause forever. If this object 17 // is detroyed, the child will be destroyed, even if the closure did not 18 // finish running. It's ok to signal the child from outside of this class to 19 // destroy it. 20 // This class cannot be instanciated from a multi-threaded process, as it needs 21 // to fork(). 22 class SANDBOX_EXPORT ScopedProcess { 23 public: 24 // A new process will be created and |child_callback| will run in the child 25 // process. This callback is allowed to terminate the process or to simply 26 // return. If the callback returns, the process will wait forever. 27 explicit ScopedProcess(const base::Closure& child_callback); 28 ~ScopedProcess(); 29 30 // Wait for the process to exit. 31 // |got_signaled| tells how to interpret the return value: either as an exit 32 // code, or as a signal number. 33 // When this returns, the process will still not have been reaped and will 34 // survive as a zombie for the lifetime of this object. This method can be 35 // called multiple times. 36 int WaitForExit(bool* got_signaled); 37 38 // Wait for the |child_callback| passed at construction to run. Return false 39 // if |child_callback| did not finish running and we know it never will (for 40 // instance the child crashed or used _exit()). 41 bool WaitForClosureToRun(); GetPid()42 base::ProcessId GetPid() { return child_process_id_; } 43 44 private: 45 bool IsOriginalProcess(); 46 47 base::ProcessId child_process_id_; 48 base::ProcessId process_id_; 49 int pipe_fds_[2]; 50 DISALLOW_COPY_AND_ASSIGN(ScopedProcess); 51 }; 52 53 } // namespace sandbox 54 55 #endif // SANDBOX_LINUX_SERVICES_SCOPED_PROCESS_H_ 56