implicit declaration of function 'execle' error

Question

I keep getting

implicit declaration of function \'execle\' is invalid in C99

when compiling the code below. What am I missing?

Answer 1

I got it working. That's the order the statements should be as it turns out. Anything after execle won't run.

#include 
#include 
#include 


  char *my_env[] = {"JUICE=PEACH and apple", NULL};
int main (int argc, char *argv[]) 
{
  printf ("Diners: %s\n", argv[1]);
  printf ("Juice: %s\n", getenv("JUICE"));
  execle ("diner_info", "diner_info", "4", NULL, my_env);
  return 0;
}

Result:

# :$ gcc diner_info.c -o diner_info && ./diner_info 
Diners: (null)
Juice: (null)
Diners: 4
Juice: PEACH and apple
Diners: 4
Juice: PEACH and apple
Diners: 4
Juice: PEACH and apple
Diners: 4
Juice: PEACH and apple
Diners: 4
Juice: PEACH and apple
Diners: 4
Juice: PEACH and apple

But I still don't understand why the null values on the top, though.