fifo.c

#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>


FILE * fifo;
char BUFF[500];

struct a_header{
    char* name;
    a_header(char* name): name(name){}
};

struct a_header *header = new a_header("foo");


struct list{
    struct list *next;
    char* string;
    list(){
        next = NULL;
        string = "foo";
    }
};

void FIFOstuff(struct list *L) { //L is a linked list of strings
    mkfifo("q1", 0777);
    pid_t pid = fork();
    if (pid == 0) {
        try{
        execl("./myPy.py", (char *)NULL);
        }
        catch(int e){
           printf("An exception occurred. Exception Nr. %d\n ", e); 
        }
    } else {
        fifo = fopen("q1", "w");
        fprintf(fifo, "%s\n", header->name);
        if(L != NULL){
            printf("l != null");
        };
        while (L != NULL) {
            fprintf(fifo, "%s\n", L->string);
            L = L->next;
        }
        fclose(fifo);

        mkfifo("q2", 0777);
        fifo = fopen("q2", "r");
        while (fscanf(fifo, "%s", BUFF) == 1) {
            printf("%s\n", BUFF);
        }
        fclose(fifo);
        remove("q2");
    }
}

int main(){
    struct list *l = new struct list();
    FIFOstuff(l);
}

myPy.py

#!/usr/bin/python

import logging
import os

logging.basicConfig(level=logging.DEBUG, filename='myapp.log')

def reader():
    text = []
    with open("q1", "r") as fifo:
        text.append(fifo.readline())
        text.append(fifo.read())
    return text

def writer(text):
    with open("q2", "w") as fifo:
        for line in text:
            fifo.write(line)

try:
    writer(reader())
except OSError:
    logging.exception("Mistake")