Using argv, envp and apple variables

#include <stdio.h>
#include <stdint.h>

void print_nultstr(const char* envstr[], const char* envstr_name){
    uint32_t i;
    const char* tstr;

    if(envstr == NULL || envstr_name == NULL){
        return;
    }
    i = 0;
    tstr = envstr[0]; // Might be unsafe
    do{
        printf("%s[%d]: %s\n", envstr_name, i, tstr);
        ++i;
        tstr = envstr[i];
    }while(tstr != NULL);
}

int main(int argc, const char * argv[], const char* envp[], const char* apple[]) {
    print_nultstr(argv, "argv");
    print_nultstr(envp, "envp");
    print_nultstr(apple, "apple");

    return 0;
}