#include <iostream>
#include <string>

#include <signal.h>
#include <unistd.h>

#include <sys/types.h>

#include <bobcat/pipe>
#include <bobcat/ofdstream>
#include <bobcat/ifdstream>
#include <bobcat/process>
#include <bobcat/fork>

class ChildIO: public FBB::Fork
{
    FBB::Pipe childInput;   // child reads this
    FBB::Pipe childOutput;   // child writes this

    public:
        void childRedirections()    override;
        void childProcess()         override;
        void parentProcess()        override;
};

using namespace std;
using namespace FBB;


void ChildIO::childRedirections()
{
    childInput.readFrom(Redirector::STDIN);
    childOutput.writtenBy(Redirector::STDOUT);
}

void ChildIO::childProcess()
{
        // The /bin/cat program replaces the
        // child process started by Fork::fork()
    Process process(Process::DIRECT, "/bin/cat");
    process.start();
   
    // this point is never reached
}

void ChildIO::parentProcess()
{
        // Set up the parent's sides of the pipes
    IFdStream fromChild(childOutput.readOnly());
    OFdStream toChild(childInput.writeOnly());

        // write lines to the child, read its output
    string line;
    while (true)
    {
        cout << "? ";
        line.clear();
        getline(cin, line);

        if (line.empty())
        {
            kill(pid(), SIGTERM);
            break;
        }

        toChild << line << endl;

        getline(fromChild, line);
        cout << "Got: " << line << endl;
    }
    cout << "The child returns value " << waitForChild() << endl;
}

int main()
try
{
    ChildIO io;

    io.fork();

    return 0;
}
catch(exception const &exc)
{
    cerr << "Exception: " << exc.what() << endl;
}
catch(int x)
{
    cout << "The child terminates with: " << x << endl;
    return x;
}
