system.getenv(3kaya) debian man page | unix.com

System.getEnv(3kaya)					       Kaya module reference					      System.getEnv(3kaya)

NAME
       System::getEnv - Get the value of an environment variable.

SYNOPSIS
       String getEnv( String env )

ARGUMENTS
       env The name of the environment variable

DESCRIPTION
       Retrieves the value of an environment variable.

       This is often necessary in a web application as the web server will set environment variables in the program. Some of these headers are set
       by the server environment, others are set based on the current request (and so may be trivially forged by the user's browser).

    ua = getEnv("HTTP_USER_AGENT"); // Contents of User-Agent header
    host = getEnv("HTTP_HOST"); // the IP address of the web server
    user = getEnv("REMOTE_USER"); // the username under HTTP authentication
    ip = getEnv("REMOTE_ADDR"); // the client's IP address

       Environment variables are also useful for command-line programs

    home = getEnv("HOME"); // The user's home directory on Posix systems
    proxy = getEnv("HTTP_PROXY"); // The HTTP proxy to use for outgoing connections

       If the environment variable is not set, the empty String will be returned.

AUTHORS
       Kaya standard library by Edwin Brady, Chris Morris and others (kaya@kayalang.org). For further information see http://kayalang.org/

LICENSE
       The Kaya standard library is free software; you can redistribute it and/or modify it under the terms  of  the  GNU  Lesser  General  Public
       License (version 2.1 or any later version) as published by the Free Software Foundation.

RELATED
       System.getArgs(3kaya)
       System.getPID(3kaya)

Kaya								   October 2012 					      System.getEnv(3kaya)