fifo

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <pthread.h>


void *wyslij(void* arg){
int i,x;
int fid = open("fifo12",0666);
for(i = 0; i<10;i++){
    int* qid = (int*) arg;
    x = (rand() % 10);
    write(fid,&x,4);
    }
}

void *odbierz(void* arg){
int i,s,buf = 0;
int fid = open("fifo12",0666);
for(i = 0;i<10;i++){

    read(fid,&buf,4);
    s += buf;
    }
close(fid);
fid = open("fifo23",0666);
write(fid,&s,4);
}

void *pokaz(void* arg){
    int buf;
    int fid = open("fifo23",0666);
    read(fid,&buf,4);
printf("%d\n",buf);
close(fid);
}

int main(){
srand(4324);
mkfifo("fifo12",0666);
mkfifo("fifo23",0666);
pthread_t w,o,p;
pthread_create(&w,NULL,wyslij,NULL);
pthread_create(&o,NULL,odbierz,NULL);
pthread_create(&p,NULL,pokaz,NULL);

pthread_join(w,NULL);
pthread_join(o,NULL);
pthread_join(p,NULL);
unlink("./fifo12");
unlink("./fifo23");
return 0;

}