71 lines
2.3 KiB
Bash
Executable File
71 lines
2.3 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -Eeuo pipefail
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if [[ ${EUID} -ne 0 ]]; then
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echo "The Bluetooth control helper must run as root." >&2
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exit 1
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fi
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BLUETOOTHCTL=/usr/bin/bluetoothctl
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SYSTEMCTL=/usr/bin/systemctl
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BRIDGE_SERVICE=pi-car-companion-bluetooth.service
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print_status() {
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local details powered discoverable pairable message
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details="$(LC_ALL=C "${BLUETOOTHCTL}" show 2>/dev/null || true)"
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if ! grep -q '^Controller ' <<<"${details}"; then
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printf '%s\n' '{"supported":false,"powered":false,"discoverable":false,"pairable":false,"message":"No Bluetooth adapter was found."}'
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return
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fi
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powered="$(sed -n 's/^[[:space:]]*Powered: //p' <<<"${details}" | head -n 1)"
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discoverable="$(sed -n 's/^[[:space:]]*Discoverable: //p' <<<"${details}" | head -n 1)"
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pairable="$(sed -n 's/^[[:space:]]*Pairable: //p' <<<"${details}" | head -n 1)"
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[[ "${powered}" == "yes" ]] && powered=true || powered=false
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[[ "${discoverable}" == "yes" ]] && discoverable=true || discoverable=false
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[[ "${pairable}" == "yes" ]] && pairable=true || pairable=false
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if [[ "${discoverable}" == "true" ]]; then
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message="The Pi is visible to nearby phones for three minutes."
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elif [[ "${powered}" == "true" ]]; then
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message="Bluetooth is on and the companion bridge is available."
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else
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message="Bluetooth is off."
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fi
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printf '{"supported":true,"powered":%s,"discoverable":%s,"pairable":%s,"message":"%s"}\n' \
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"${powered}" "${discoverable}" "${pairable}" "${message}"
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}
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power_on() {
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"${SYSTEMCTL}" start bluetooth.service
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/usr/sbin/rfkill unblock bluetooth
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"${BLUETOOTHCTL}" power on >/dev/null
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"${SYSTEMCTL}" enable --now "${BRIDGE_SERVICE}" >/dev/null
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}
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case "${1:-}" in
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status)
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;;
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on)
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power_on
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;;
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off)
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"${SYSTEMCTL}" disable --now "${BRIDGE_SERVICE}" >/dev/null
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"${BLUETOOTHCTL}" discoverable off >/dev/null 2>&1 || true
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"${BLUETOOTHCTL}" pairable off >/dev/null 2>&1 || true
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"${BLUETOOTHCTL}" power off >/dev/null
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/usr/sbin/rfkill block bluetooth
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;;
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discoverable)
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power_on
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"${BLUETOOTHCTL}" discoverable-timeout 180 >/dev/null
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"${BLUETOOTHCTL}" pairable-timeout 180 >/dev/null
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"${BLUETOOTHCTL}" pairable on >/dev/null
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"${BLUETOOTHCTL}" discoverable on >/dev/null
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;;
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*)
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echo "Usage: pi-car-companion-bluetooth-control status|on|off|discoverable" >&2
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exit 2
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;;
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esac
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print_status
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