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- Add zeroize dependency, wrap password in Zeroizing<String> from entry extraction through to login_worker (prevents heap-resident plaintext) - Add MAX_BLUR_DIMENSION (1920px) downscale before GPU blur to reduce 4K workload - Wallpaper: use symlink_metadata + is_symlink rejection in greeter.rs and config.rs - Avatar: add is_file() check, swap lookup order to ~/.face first (consistent with moonlock/moonset) - greetd errors: show generic fallback in UI, log raw PAM details at debug level only - fprintd: validate device path prefix before creating D-Bus proxy - Locale: cache detected locale via OnceLock (avoid repeated env/file reads)
Moongreet
A greetd greeter for Wayland, built with Rust + GTK4 + gtk4-layer-shell. Part of the Moonarch ecosystem.
Features
- greetd IPC — Communicates via
$GREETD_SOCK(length-prefixed JSON) - User list — Parsed from
/etc/passwd(UID 1000–65533) - Avatars — AccountsService icons,
~/.facefallback, default SVG with theme tinting - Sessions — Discovered from
/usr/share/wayland-sessions/and/usr/share/xsessions/ - Last user/session — Remembered in
/var/cache/moongreet/ - Power actions — Reboot / Shutdown via
loginctl - Layer Shell — Fullscreen via gtk4-layer-shell (TOP layer)
- Multi-monitor — Greeter on primary, wallpaper on all monitors
- i18n — German and English (auto-detected from system locale)
- Faillock warning — Warns after 2 failed attempts, locked message after 3
- Fingerprint — fprintd support via greetd multi-stage PAM (configurable)
Requirements
- GTK 4
- gtk4-layer-shell (for Wayland fullscreen)
- greetd
Building
cargo build --release
Installation
# Install binary
sudo install -Dm755 target/release/moongreet /usr/bin/moongreet
# Install config
sudo mkdir -p /etc/moongreet
sudo cp config/moongreet.toml /etc/moongreet/moongreet.toml
System Setup
-
Edit
/etc/moongreet/moongreet.toml— set an absolute path for the wallpaper. -
Create cache directory:
sudo mkdir -p /var/cache/moongreet/last-session sudo chown greeter:greeter /var/cache/moongreet -
Configure greetd (
/etc/greetd/config.toml):[default_session] command = "niri -c /etc/greetd/niri-greeter.kdl" user = "greeter"
Development
# Run tests
cargo test
# Build release
cargo build --release
# Run locally (without greetd, needs LD_PRELOAD for layer-shell)
LD_PRELOAD=/usr/lib/libgtk4-layer-shell.so ./target/release/moongreet
License
MIT