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   getenv

   Usage
   #include <stdlib.h>
   char *getenv(const char *name);

   Description
   getenv   searches   the environment list for a string  of   the   form
   "NAME=value"  and  returns a pointer to the value string,  if  such  a
   string is present. The NAME string should be capitalized.

   Example
   #include <stdio.h>
   #include <stdlib.h>
   main()
   {
   char *path;
   path = getenv("PATH");
   printf("PATH = %s\n",path);
   }

   Return Value
   Returns  a pointer to the value string of an environment  variable.  A
   return  value  of  NULL  indicates the name was  not  found   in   the
   environment.