#include <iostream>

#ifndef SUBPROCESS_H_
#define SUBPROCESS_H_

class Subprocess {
public:
    Subprocess(const char* name_of_child_process);
    Subprocess(const Subprocess & obj);
    ~Subprocess();
    void Create_Process();
private:
    pid_t pid;
    const char* cmdline;
};
void signal_handler(int signal);

#endif /* SUBPROCESS_H_ */



/*
 * Subprocess.cpp
 */

#include <iostream>
#include <sys/types.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <signal.h>
#include <csignal>
#include "Subprocess.h"
#include <vector>
#include <memory>
using namespace std;

void signal_handler(int signal)
{
    cout<<"I am a signal handler"<<endl;
    int child_status;
    pid_t pid;
    for(;;)
    {
        pid=waitpid(-1, &child_status, WNOHANG);
        if(pid>0)
        {
            cout <<"Process with pid "<<pid<<" terminated"<<endl;
            pid=fork();
            cout << "Process with pid "<<pid<<"restarted "<<endl;
            break;
        }
        pause();
    }

}

Subprocess::Subprocess(const char* name_of_child_process)
{
    cout<<"Default constructor"<<endl;
    cmdline=name_of_child_process;
    pid=fork();
    if (pid==-1) cout<<"Error ,process not fork"<<endl;
    else if (pid==0) {
        cout <<"I am children process"<<getpid()<<"  My pa_pid "<<getppid()<<endl;
        execlp("gnome-terminal","gnome-terminal","-e",cmdline,NULL);
        cout<<"Child process created with name "<<cmdline<<endl;
        for(;;);
    }
    else
    {
        cout<<"I am a parent with pid "<<getpid()<<endl;
        signal(SIGCHLD,signal_handler);


    }


}


void Subprocess::Create_Process()
{

}

Subprocess::~Subprocess() {
    kill(pid,SIGTERM);
}

int main()
{

    Subprocess process1("/bin/sh");
    //Subprocess process2("xclock");
    //vector<shared_ptr<Subprocess> > processes;
    //processes.push_back(process1("/bin/sh"));
    //processes.push_back(make_shared<Subprocess>("/bin/sh"));
}

pid=fork();
    if (pid==-1) cout<<"Error ,process not fork"<<endl;
    else if (pid==0) {
        cout <<"I am children process"<<getpid()<<"  My pa_pid "<<getppid()<<endl;
        execlp("gnome-terminal","gnome-terminal","-e",cmdline,NULL);
        // Этот код, следующий ПОСЛЕ execlp, не будет выполняться НИКОГДА
        cout<<"Child process created with name "<<cmdline<<endl;
        for(;;);
    }
    else
    {
        cout<<"I am a parent with pid "<<getpid()<<endl;
        // !!!!!!!!!!!!!!!!!!!!!!!!!!!!!
        Запоминаем pid в списке запущенных процессов

    }