spawn.h

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/*
 * $Id: spawn.h 2 2015-12-03 19:46:25Z wejaeger $
 *
 * File:   spawn.h
 * Author: Werner Jaeger
 *
 * Created on November 19, 2015, 5:31 PM
 *
 * Copyright 2015 Werner Jaeger.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef SPAWN_H
#define SPAWN_H

#include <ext/stdio_filebuf.h> // NB: Specific to libstdc++
#include <iostream>
#include <fstream>

class Cpipe
{
public:

   Cpipe();
   virtual ~Cpipe();

   const inline int readFd() const;
   const inline int writeFd() const;
   void close();

private:
   int m_aiFd[2];
};

//
// Usage:
//   spawn s(argv)
//   s.stdin << ...
//   s.stdout >> ...
//   s.send_eol()
//   s.wait()
//
class Spawn
{
public:
    Spawn(const char* const argv[], bool fUseStdErr = false, bool fWithPath = false, const char* const envp[] = NULL);
    virtual ~Spawn();

    std::istream& inStream() { return(stdout); }

    std::ostream& outStream() { return(stdin); }
    void sendEof();
    int wait();

private:
   Spawn(const Spawn& orig);

   Spawn& operator=(const Spawn& orig);

    int m_iChildPid;
    __gnu_cxx::stdio_filebuf<char> *m_pWriteBuf;
    __gnu_cxx::stdio_filebuf<char> *m_pReadBuf;
    std::ostream stdin;
    std::istream stdout;
    Cpipe m_WritePipe;
    Cpipe m_ReadPipe;
};

#endif /* SPAWN_H */