clockd/README at master · maemo-leste/clockd · GitHub

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                  Clock Daemon and libtime
                  ========================

 * Provide service and API for requesting, changing and notifying time
   and timezone changes.

 * Provide interface for monitoring network time notifications.

Structure
=========
 The following ASCII art describes the architecture.

     +-----+  +-----+  +-----+
     |app 1|  |app 2|  |app 3| applications
     -------------------------  libtime.h
            | libtime |
            +---------+
              ^ ^ ^
              | | |
        D-Bus | | |
              | | |
              v v v
            +------+  D-Bus +---+
     daemon |clockd|<-------|csd|
            +------+        +---+
                |                 userland
     -------------------------------------
                |                 kernel
          - systemtime
          - RTC (real time clock)
          - timezone

Components
==========
 clockd
  - The Daemon
  - Provides centralized place for handling time

 libtime
  - API library