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getenv

Usage

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

   ANSI

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>

   int main()
   {
       char *path;
       path = getenv("PATH");
       printf("PATH = %s\n",path);
       return EXIT_SUCCESS;
   }

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.