KYSDK-SYSTIME(8)

💖 kysdk-systime — the KYLIN SDK System Time Monitoring Service 💖

okay bestie, so this is kysdk-systime(8), a System Administration Utilities page, and it is literally the most organized little daemon you've ever met. she watches the clock so you don't have to. let's get into it ✨

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🎀 NAME 🎀

kysdk-systime — KYLIN SDK System Time Monitoring Service

like. that's her. that's the whole girl. a time monitoring service for the KYLIN SDK system 💅

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🌸 SYNOPSIS 🌸

kysdk-systime

that's it. no flags, no args, no drama. she just runs 👑

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✨ DESCRIPTION ✨

okay so kysdk-systime is a system time monitoring service in the KYLIN SDK system, and she is booked and busy. her whole thing is providing real-time system time broadcasting and monitoring capabilities — she detects system time changes and timezone changes, and then broadcasts that time info out through D-Bus signals.

she runs as a system daemon, which means she is always on, continuously monitoring the system clock for changes and broadcasting time updates every minute. she also keeps an eye out for system time adjustments and timezone changes, so that accurate time information is available to all subscribed applications. she's giving main character energy for the whole system clock fr fr 🕐

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🌈 FEATURES 🌈

Real-time Time Broadcasting

Broadcasts current system time every minute through D-Bus signals. every. single. minute. consistency queen 🎀

System Time Change Detection

Monitors and detects system time adjustments using timerfd. she sees you changing the clock 👀

Timezone Change Monitoring

Monitors changes to system timezone settings using inotify.

D-Bus Signal Broadcasting

Provides time information through D-Bus signals for inter-process communication. she's a connector, a communicator, an icon 💫

Precise Timing

Uses high-precision timers for accurate time synchronization. no cap, she is precise about it ⏱️

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💜 D-Bus INTERFACE 💜

so the service implements this D-Bus interface — com.kylin.kysdk.TimeInterface — with these signals:

• TimeSignal — emitted every minute with current time information, in this format: "YYYY/MM/DD HH:MM:SS"
• TimeChangeSignal — emitted when system time or timezone changes, providing updated time information

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🦋 MONITORED EVENTS 🦋

System Time Changes

Detects manual time adjustments, NTP synchronization, and other time modifications. she notices everything, bestie.

Timezone Changes

Monitors changes to /etc/localtime for timezone updates.

Clock Drift

Handles clock synchronization and drift correction. she gently course-corrects, like a good friend 🫶

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⭐ THREADING MODEL ⭐

the service uses a multi-threaded architecture, because one thread could never:

• Main Thread — handles D-Bus communication and main event loop
• Time Change Monitor Thread — monitors system time changes using timerfd
• Timezone Monitor Thread — monitors timezone changes using inotify
• Time Broadcast Thread — manages periodic time broadcasting

four threads, four jobs, zero chaos. we love a delegation moment 💅

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🧚 TIMER SYSTEM 🧚

• Periodic Timer — runs every 60 seconds for regular time broadcasting
• Single-shot Timer — used for immediate time change notifications
• Timer Synchronization — automatically resynchronizes when time changes are detected

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🍓 FILES 🍓

• /usr/bin/systime — Main executable file
• /etc/systemd/system/kysdk-systime.service — Systemd service configuration file
• /etc/localtime — Monitored file for timezone changes

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👑 SERVICE 👑

the service runs as a systemd service with:

• Service name: kysdk-systime.service
• D-Bus name: com.kylin.kysdk.TimeServer
• Object path: /com/kylin/kysdk/Timer
• Interface: com.kylin.kysdk.TimeInterface
• Type: D-Bus activated service

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🔥 DEPENDENCIES 🔥

• D-Bus — For inter-process communication
• GLib — For main loop integration
• libkytimer — For timer management functionality
• systemd — For service management

she has a support system. as she should 💖

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🌸 SIGNAL HANDLING 🌸

• SIGTERM, SIGINT — Graceful shutdown signals
• TFD_TIMER_CANCEL_ON_SET — Special timer flag for detecting time changes

bestie note: SIGTERM and SIGINT are the "okay, wrap it up" signals — she goes down gracefully, obviously. no messy exits here 💅

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💫 TIME FORMATS 💫

All time information is broadcast in the following format:

YYYY/MM/DD HH:MM:SS

breaking that down, because details matter:

• 4-digit year
• 2-digit month (01-12)
• 2-digit day (01-31)
• 2-digit hour (00-23)
• 2-digit minute (00-59)
• 2-digit second (00-59)

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🎀 SYNCHRONIZATION 🎀

Automatic Resync

Automatically resynchronizes timers when time changes are detected. she's on it.

Mis-sync Handling

Detects and corrects timing drift or missed notifications. she does not let things slide, and honestly? iconic.

Timer Management

Intelligently manages periodic and single-shot timers.

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🫶 AUTHOR 🫶

KylinSoft Co., Ltd.

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💜 COPYRIGHT 💜

Copyright (C) 2023-2025, KylinSoft Co., Ltd.

This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

okay so real talk: that warranty disclaimer is not a vibe killer, it's just the license being honest with you. free software, free as in "no promises, bestie" 🙈

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🌈 SEE ALSO 🌈

dbus-daemon(1), systemd(1), timedatectl(1), ntp(8), tzset(3)

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that's the whole page, you ate it, you understood it, periodt ✨

this was Version 0.1, dated 2025 — kysdk-systime(8), the KYLIN SDK time service that never misses a minute. go forth and know what time it is 💖🕐🎀