fifo lab8

gcc -Wall -o fifo fifo.c
params=""
while [ $1 ]; do
        params="$params $1"
done
./fifo $params
wait $!
sleep 0.1
echo

#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>
#include <string.h>
#define BUFFER 50

int main()
{
    char *myfifo = "mojefifo";
    mkfifo(myfifo, 0666);

    int fd;

    if(fork() == 0) {
        fd = open(myfifo, O_RDONLY);
        char buffer[BUFFER];
        int pid = getpid();
        ssize_t bytes_read;
        while((bytes_read = read(fd, buffer, BUFFER-1)) > 0)
        {
            buffer[bytes_read] = '\0';
            printf("Proces %d odczytal: %s\n", pid, buffer);
            sleep(0.02);
        }
        close(fd);
        unlink(myfifo);
    } else if(fork() == 0) {
        fd = open(myfifo, O_RDONLY);
        char buffer[BUFFER];
        int pid = getpid();
        ssize_t bytes_read;
        while((bytes_read = read(fd, buffer, BUFFER-1)) > 0)
        {
            buffer[bytes_read] = '\0';
            printf("Proces %d odczytal: %s\n", pid, buffer);
            sleep(0.02);
        }
        close(fd);
        unlink(myfifo);
    } else {
        fd = open(myfifo, O_WRONLY);
        char buffer[200];
        ssize_t n;
        while((n=read(STDIN_FILENO, buffer, 200)) > 0){
                write(fd, buffer, n);}//printf("%s", buffer);}
        close(fd);
    }
    return 0;
}