Add a system() call to the d8 shell (Unix only).

src/d8.h

-// Copyright 2008 the V8 project authors. All rights reserved.
+// Copyright 2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
 //       with the distribution.
@@ skipping 111 matching lines @@
   static Handle<Array> GetCompletions(Handle<String> text,
                                       Handle<String> full);
   static Handle<Object> DebugMessageDetails(Handle<String> message);
   static Handle<Value> DebugCommandToJSONRequest(Handle<String> command);
 
   static Handle<Value> Print(const Arguments& args);
   static Handle<Value> Yield(const Arguments& args);
   static Handle<Value> Quit(const Arguments& args);
   static Handle<Value> Version(const Arguments& args);
   static Handle<Value> Load(const Arguments& args);
+  // system("program_name", ["arg1", "arg2", ...], timeout1, timeout2) will run
+  // the command, passing the arguments to the program.  The standard output of
+  // the program will be picked up and returned as a multiline string.  If
+  // timeout1 is present then it should be a number.  -1 indicates no timeout
+  // and a positive number is used as a timeout in milliseconds that limits the
+  // time spent waiting between receiving output characters from the program.
+  // timeout2, if present, should be a number indicating the limit in
+  // milliseconds on the total running time of the program.  Exceptions are
+  // thrown on timeouts or other errors or if the exit status of the program
+  // indicates an error.
+  static Handle<Value> System(const Arguments& args);
 
   static Handle<Context> utility_context() { return utility_context_; }
 
   static const char* kHistoryFileName;
   static const char* kPrompt;
  private:
   static Persistent<Context> utility_context_;
   static Persistent<Context> evaluation_context_;
   static CounterMap* counter_map_;
   // We statically allocate a set of local counters to be used if we
@@ skipping 22 matching lines @@
   const char* name_;
   LineEditor* next_;
   static LineEditor* first_;
 };
 
 
 }  // namespace v8
 
 
 #endif  // V8_D8_H_