I want to capture the login and logout time of user when it enter or exit the systems like Windows, linux, unix

Avg Bid (USD)
Project Budget (USD)
$30 - $250

Project Description:
Looking for some who can write a cross-platform library to capture the user log-in and log-out time on various systems like windows, linux, unix, mac os and may be few more details like date,username etc. Also may need to trigger a event , which can start another application once user logged into the system or write the information to a file or database.

Skills required:
Microsoft, PHP, Software Architecture
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