//

// Created by bartek on 20.11.17.

//



#include <stdio.h>

#include <unistd.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <sys/mman.h>

#include <fcntl.h>



#define image "pies.jpg"





int main(){



    int fd, file,temp;

    int lp;

  //char n_pliku[15] = "asfasf";

    char buf[128];

    struct stat str;

    char *mp;



    if(fork() == 0) {

    while((temp=open("tmp",O_RDONLY))<0){

        sleep(1);

    }



        execlp("eog","eog", "tmp", NULL);

    close(temp);

        exit(-1);

    }





            while (1) {



                printf("Nazwa pliku do wyswietlenia: ");

                scanf("%s", buf);

                fd = open(buf, O_RDONLY);

                fstat(fd, &str);



                file = open(image, O_RDWR|O_CREAT, 0666);

                ftruncate(file, str.st_size);



        mp = mmap(0, str.st_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);

        read(fd,mp,str.st_size);





                close(file);

                close(fd);

        printf("\n");

        }





    return 0;

}







/*    if(msync(mp, str.st_size, MS_SYNC)<0) {

                    int it = 0;

                    while ((lp = read(fd, buf, 4096)) > 0) {

                        for (int i = 0; i < lp; i++) {

                            mp[it] = buf[i];

                            it++;

                        }



                    }

                }*/