nevaforget
a462b2cf06
Fingerprint auth was missing because moongreet rejected multi-stage auth_message sequences from greetd. With pam_fprintd.so in the PAM stack, greetd sends non-secret prompts for fingerprint and secret prompts for password — moongreet now handles both in a loop. - Replace single-pass auth with multi-stage auth_message loop - fprintd D-Bus probe (gio::DBusProxy) for UI feedback only - Fingerprint label shown when device available and fingers enrolled - 60s socket timeout when fingerprint available (pam_fprintd scan time) - Config option: [appearance] fingerprint-enabled (default: true) - Fix: password entry focus loss after auth error (grab_focus while widget was insensitive — now re-enable before grab_focus)
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