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

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

        int fd1 = open(argv[1],O_RDONLY);
        int fd2 = open(argv[2],O_WRONLY|O_CREAT|O_TRUNC,0666);

        char buffer[1000];
        int bytes;
        while(1){
                bytes = read(fd1, buffer,1000);
                if (bytes<=0){
                        break;
                }

                write(fd2, buffer, bytes);
        }

        close(fd1);
        close(fd2);

}