#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <dirent.h>
#include <stdlib.h>

int main(int argc , char **argv){

    DIR *dir;
    struct dirent *entree;

    struct stat info;

    int descOutput;
    int descCurrent;

    int nbrOc;
    char buffer[1024];





    if (argc != 2) {
               printf("argg sdq");
               exit(-1);
    }

             if (lstat(argv[1], &info) == -1) {
               printf("error stat");
               exit(-1);
           }




    if(!S_ISDIR(info.st_mode) ){
        printf("n'est pa dossier  \n");
    }


    if(chdir(argv[1]) !=0){
        printf("erreur  chdir \n");
    }


    dir=opendir(".");

    descOutput=open("/tmp/filereg",O_WRONLY|O_CREAT|O_TRUNC |O_APPEND,0666);

    while(entree=readdir(dir)){
        stat(entree->d_name, &info);

        if(S_ISREG(info.st_mode) ){
        printf("%s \n",entree->d_name);

        descCurrent=open(entree->d_name,O_RDONLY);

        while(nbrOc=read(descCurrent, buffer,1024)){
            printf("%d nbr caracere lu\n",nbrOc );
                write(descOutput,buffer,nbrOc);
        }


        close(descCurrent);


        }



    }

    close(descOutput);




    return 0;
}