/* envaddr.c */
#include <stdio.h>
#include <stdlib.h>

//first create MYSHELL environment variable: export MYSHELL="/bin/sh"

int main()
{
   char *shell = (char *)getenv("MYSHELL");

   if(shell){
      printf("  Value:   %s\n",   shell);
      printf("  Address: %x\n", (unsigned int)shell);
   }

   return 1;
}