environ - external variable for environment

Definition	extern char * *environ; environ is an external variable that points to an array of strings with environment variables, called the "environment" in short. Each string in the array has the form "name=value", where name designates the environment variable and value represents its current value. Environment variables provide a way to make information about a program's environment available to applications (see section “Environment variables”).
Note	The environ array should not be directly accessed by the application.
See also	getenv, putenv.