Popen.h

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// -*- C++ -*-

// PLearn (A C++ Machine Learning Library)
// Copyright (C) 2001 Pascal Vincent, Yoshua Bengio and University of Montreal
//

// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// 
//  1. Redistributions of source code must retain the above copyright
//     notice, this list of conditions and the following disclaimer.
// 
//  2. 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.
// 
//  3. The name of the authors may not be used to endorse or promote
//     products derived from this software without specific prior written
//     permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
// NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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// 
// This file is part of the PLearn library. For more information on the PLearn
// library, go to the PLearn Web site at www.plearn.org


/* *******************************************************      
   * $Id: Popen.h,v 1.5 2004/07/21 16:30:54 chrish42 Exp $
   * This file is part of the PLearn library.
   ******************************************************* */

// This file contains useful functions for string manipulation
// that are used in the PLearn Library


#ifndef Popen_INC
#define Popen_INC

#include <plearn/base/general.h>

namespace PLearn {
using namespace std;

  class Popen: public PPointable
  {
  protected:
    void launch(const string& command, const vector<string>&
                commandoptions);
    void launch(const string& command); 

    bool verbose;
    bool process_alive;

  public:

// norman: pid_t not supported
#ifndef WIN32
    pid_t pid;
#endif
    
    int fdin;
    int fdout;    
    PStream in; //should these be only one I/O PStream? -xsm
    PStream out;
    
    Popen(const string& command, 
          bool the_verbose = false) 
      { verbose = the_verbose; launch(command); }

    Popen(const string& command, const vector<string>& commandoptions, 
          bool the_verbose = false) 
      { verbose = the_verbose; launch(command,commandoptions); }

    // wait for process termination and return exit value
    // NOTE: this must be called after all output from the program
    // has been read. (Some progs block until their output is read.)
    int wait();
    
    ~Popen();

  };

  
  vector<string> execute(const string& command);

} // end of namespace PLearn

#endif

---