kod1

#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <stdio.h>

int main(void)
{
    /* Proces 1 - pobiera dane z STDIN (deskryptor 0) i zapisuje w pliku */
    if(fork())
    {
        int  des;
        int n;
        char buf[20];
        char buf1[20];

        des = open( "/tmp/file.txt", O_CREAT | O_RDWR | O_APPEND,  0666 );

        while(((n = read(0, buf, sizeof(buf))) > 0))
        {
            //printf("Wczytano: %d\n",n);
            des=open("/tmp/file.txt",O_WRONLY);
            write( des, buf, sizeof( buf ) );
            sprintf(buf1,"%x",*buf);
            //write(1,buf1,sizeof(buf1));
            printf("Otrzymałem: %s\n",buf);
            write(des,buf,sizeof(buf));
            bzero(buf,sizeof(buf1));
            close(des);
        }
    }
        /* Proces 2 - odczytuje z pliku i przekazuje dane za pomocą FIFO do procesu 3 */
        //if(fork())
        else
        {
            int  des;
            int n;
            char buf[20];
            char buf1[20];
            des = open( "/tmp/file.txt", O_RDONLY);

            while((n = read(des, buf, sizeof(buf))) > 0)
            {
                 des=open("/tmp/file.txt",O_RDONLY);
                 read(des,buf,sizeof(buf1));
                 //sprintf(buf1,"%x",*buf);
                 printf("Mam: %s\n",buf);
                 //write(2,buf1,3);
                 close(des);
                 bzero(buf,sizeof(buf));
            }
            /* Proces 3 - wypisuje otrzymane dane na STDOUT (deskryptor 1) */
            //if(fork())
            //{
            //  ;
            //}
        }
        //close(des);
    //}

    sleep(100);
    return 0;
}