#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/wait.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

int main()
{

pid_t pid;
int p[2];

mkfifo("p",0600);

//mkfifo("q",0600);

p[1]=open("p+",O_WRONLY);
p[0]=open("p+",O_WRONLY);
//q=open("q+",O_WRONLY);

pid=fork();

if(pid==0) /// fiul
{
    close(p[0]); /// inchidem capatul pe care-l vom folosi in tata la preluarea output-ului acestui copil


    dup(p[1]); /// pt a trimite output-ul propriu

    execlp("cat","cat","prog.c",NULL);

    close(p[1]); /// inchidem capatul de output

}

     else      /// tatal
    {
      close(p[1]); ///inchidem capatul de output

      dup(p[0]); /// pt a prelua ce era in capatul de output

      execlp("grep","grep","include>","prog.c",NULL);

      close(p[0]);



}

}