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

int main(int argc,char **argv)
{   
    char bufor[50];
    int file_read,file_open,file_open_p,file_read_p;
    srand(time(0));
    
    if (argc != 3) 
    {
        printf ("%s <file name>", argv[0]);
        return 1;
    }
    
    mkfifo("potok",0640);

    file_open=open(argv[2],O_WRONLY | O_CREAT,0640);
    if (file_open==-1)
    {
        perror("write_only_file error");
        exit(EXIT_FAILURE);
    }
    
    file_read=open(argv[1],O_RDONLY,0640);
    if (file_read==-1)
    {
        perror("read_only_file error");
        exit(EXIT_FAILURE);
    }

    switch (fork())
    {
        case -1:
        
            perror("fork error");
            exit(EXIT_FAILURE);
            
        case 0:
            
            file_open_p=open("potok",O_RDONLY,0640);
            if (file_open_p==-1)
            {
                perror("write_p error");
                exit(EXIT_FAILURE);
            }
            while(read(file_open_p,&bufor,25)>0)
            {
                write(STDOUT_FILENO, &bufor, 25);
                write(file_open,&bufor,25);
            }
            close(file_open);
            close(file_open_p);
            printf("\n");
            _exit(EXIT_SUCCESS);
            break;
            
        default:
            
            file_read_p=open("potok",O_WRONLY | O_CREAT,0640);
            if (file_read_p==-1)
            {
                perror("read_p error");
                exit(EXIT_FAILURE);
            }
            while(read(file_read,&bufor,50)>0)
            {
                sleep(rand()%3);
                write(file_read_p,&bufor,50);
            }
            close(file_read);
            close(file_read_p);
            wait(NULL);
            exit(EXIT_SUCCESS);
            break;
            
    };
    return 0;
    
}
//Drugi program w dwoch osobnyach plikach do uruchamiania na dwoch konsolach
//producent
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <time.h>

int main(int argc,char **argv)
{   
    char bufor[50];
    int file_read,file_read_p;
    srand(time(0));
    
    if (argc != 2) 
    {
        printf ("%s <file name>", argv[0]);
        return 1;
    }
    
    file_read=open(argv[1],O_RDONLY,0640);
    if (file_read==-1)
    {
        perror("read_only_file error");
        exit(EXIT_FAILURE);
    }
    
    switch (fork())
    {
        case -1:
        
            perror("fork error");
            exit(EXIT_FAILURE);
            
        case 0:
            
           file_read_p=open("potok",O_WRONLY | O_CREAT,0640);
            if (file_read_p==-1)
            {
                perror("read_p error");
                exit(EXIT_FAILURE);
            }
            while(read(file_read,&bufor,50)>0)
            {
                sleep(rand()%3);
                write(file_read_p,&bufor,50);
            }
            close(file_read);
            close(file_read_p);
            wait(NULL);
            exit(EXIT_SUCCESS);
            break;
            
        default:;
            
    };
    return 0;
    
}
//konsument
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <time.h>

int main(int argc,char **argv)
{   
    char bufor[50];
    int file_open,file_open_p;
    srand(time(0));
    
    if (argc != 2) 
    {
        printf ("%s <file name>", argv[0]);
        return 1;
    }
    
    file_open=open(argv[1],O_WRONLY | O_CREAT,0640);
    if (file_open==-1)
    {
        perror("write_only_file error");
        exit(EXIT_FAILURE);
    }
    
    switch (fork())
    {
        case -1:
        
            perror("fork error");
            exit(EXIT_FAILURE);
            
        case 0:
            
            file_open_p=open("potok",O_RDONLY,0640);
            if (file_open_p==-1)
            {
                perror("write_p error");
                exit(EXIT_FAILURE);
            }
            while(read(file_open_p,&bufor,25)>0)
            {
                write(STDOUT_FILENO, &bufor, 25);
                write(file_open,&bufor,25);
            }
            close(file_open);
            close(file_open_p);
            printf("\n");
            _exit(EXIT_SUCCESS);
            break;
            
        default:
        break;
            
            
    };
    return 0;
    
}
/makefile nie wiem do konca czy dobry
Fifo: zadanie5.c
	gcc zadanie5.c -o Fifo.o && ./Fifo.o wejscie.txt wyjscie.txt
clean: potok
	rm potok
Potok:
	mkfifo -m 644 potok
ProdKons: producent.c
	gcc producent.c -o Prod.o && ./Prod.o wejscie1.txt
	gcc konsument.c -o Kons.o && ./Kons.o wyjscie1.txt
cleano:
	rm -f *.o