#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>

extern char **environ;

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

    printf("Poczatek procesu.\n");

    system("echo ala ma kota");
    printf("Dalszy ciag kodu...\n");

    execl("/bin/echo", "echo", "jakis napis", NULL);
    printf("Koniec kodu...\n");

    return(0);
}