ПРОГА СЛЕДУЮЩАЯ:
#include <sys/types.h>
#include <unistd.h>
#include <stdio.h>

int main() {
int fd1[2],fd2[2],a,b,result;
size_t size;
char resstring[11];
if (pipe(fd1)<0){
        printf("ERROR CREATE 1 PIPE \n");
        return -1;
    }
    if (pipe(fd2)<0){
        printf ("ERROR CREATE 2 PIPE \n");
        return -1;
    }
    result = fork();
    if (result<0) {
        printf("CANNOT CREATE PROCESS \n");
        return -1;
    }
    else if (result) {
        close(fd1[0]);
        close(fd2[1]);
        size = write(fd1[1],"HELLO WORLD!",11);
        if (size<0){
            printf("ERROR ON RECORDING!!! \n");
            return -1;
        }
        close (fd1[1]);
        printf("PARENT exit \n");
    }else {
            close(fd1[1]);
            close(fd2[0]);
            size= read(fd1[0],resstring,11);
            if(size<0) {
                printf ("CAN't read \n");
                return -1;
            }
            printf ("I READ: %s \n",resstring);
            size= write(fd2[1],resstring,11);
            printf ("I am a CHILD and I SEND: %s \n",resstring);
            close (fd1[0]);
            close (fd2[1]);
    }
    if (result) {
        size= read (fd2[0],resstring,11);
        printf ("I PROCEESS FATHER AND I READ: %s \n",resstring);
        close (fd2[0]);
    }
    return 0;

ПРИ ЛИНКОВКЕ ВЫДАЕТ:
/home/master/tmp/ccW91dhS.o(.eh_frame+ox11): undefined reference to `__gxx_personality_v0`
collect2: ld returned 1 exit status

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