Automatic Timezone Daemon

A Linux daemon to automatically update the system timezone based on location.

How It Works

1. The current location is retrieved from GeoClue
2. The timezone of the current location is determined using tzf-rs
3. The timezone is updated via systemd-timedated
4. Then, the daemon waits for the location updated signal from GeoClue, and repeats from step 1 when it happens

Note: The timezone choice may not be accurate if very close to a timezone border due to tzf-rs using simplified shape data.

Requirements

• GeoClue
• systemd
• The user must be allowed to use the org.freedesktop.timedate1.set-timezone action (root or Polkit rule)
• The user must have a running GeoClue agent or the GeoClue configuration must allow the absence of agent with an empty agent whitelist (see also Stebalien/localtime - Configuring GeoClue, geoclue/geoclue#74)

Please see the examples/ directory for sample configurations.

Configuration

$ automatic-timezoned --help
Automatically update system timezone based on location

Usage: automatic-timezoned [OPTIONS]

Options:
  -l, --log-level <LOG_LEVEL>  Log level filter. See <https://docs.rs/env_logger> for syntax [env: AUTOTZD_LOG_LEVEL=] [default: info]
  -h, --help                   Print help
  -V, --version                Print version

Packages

Development

Build

cargo build --release

Test

cargo test

Alternatives

This service depends on the tzf-rs package which bundles timezones and their geographical borders, here are some alternatives which have made different trade-offs for performance and accuracy:

• github.com/Stebalien/localtime: Depends on the unmaintained github.com/bradfitz/latlong Go library (although if you prefer Go, github.com/ringsaturn/tzf could be used).
• Gnome Automatic Time Zone (Source Code): Depends on the tzdata package and Nominatim Web API for distances.

License

GNU General Public License v3.0