Poll POP mail via fdm and notify via notify-send

fdm-poll-notify

#!/usr/bin/env bash
set -euo pipefail

STATE_DIR="$XDG_RUNTIME_DIR/fdm-poll"
STATE_FILE="$STATE_DIR/lastcount"

mkdir -p "$STATE_DIR"

out="$(fdm poll 2>/dev/null || true)"

# Extract the first integer after ":" on each line and sum it.
count="$(
	printf '%s\n' "$out" |
		sed -n 's/^[^:]*:[[:space:]]*\([0-9]\+\).*/\1/p' |
		awk '{s+=$1} END{print s+0}'
)"

last=0
[[ -f "$STATE_FILE" ]] && last="$(cat "$STATE_FILE" 2>/dev/null || echo 0)"

if ((count > last)); then
	delta=$((count - last))
	# x-canonical-private-synchronous makes repeated notifications replace each other on many setups :contentReference[oaicite:2]{index=2}
	notify-send -a mail \
		-h string:x-canonical-private-synchronous:fdm-poll \
		-h int:transient:1 \
		"New mail" "$delta new message(s) on POP server"
fi

printf '%s\n' "$count" >"$STATE_FILE"

fdm-poll-notify.service

[Unit]
Description=Poll POP mail via fdm and notify via notify-send

[Service]
Type=oneshot
Environment=DBUS_SESSION_BUS_ADDRESS=unix:path=%t/bus
ExecStart=%h/.local/bin/fdm-poll-notify

fdm-poll-notify.timer

[Unit]
Description=Periodic fdm poll

[Timer]
OnBootSec=30s
OnUnitActiveSec=2min
AccuracySec=15s

[Install]
WantedBy=timers.target