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tailscale/release/dist/synology/files/scripts/start-stop-status

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#!/bin/bash
SERVICE_NAME="tailscale"
if [ "${SYNOPKG_DSM_VERSION_MAJOR}" -eq "6" ]; then
PKGVAR="/var/packages/Tailscale/etc"
else
PKGVAR="${SYNOPKG_PKGVAR}"
fi
PID_FILE="${PKGVAR}/tailscaled.pid"
LOG_FILE="${PKGVAR}/tailscaled.stdout.log"
STATE_FILE="${PKGVAR}/tailscaled.state"
SOCKET_FILE="${PKGVAR}/tailscaled.sock"
PORT="41641"
SERVICE_COMMAND="${SYNOPKG_PKGDEST}/bin/tailscaled \
--state=${STATE_FILE} \
--socket=${SOCKET_FILE} \
--port=$PORT"
if [ "${SYNOPKG_DSM_VERSION_MAJOR}" -eq "7" -a ! -e "/dev/net/tun" ]; then
# TODO(maisem/crawshaw): Disable the tun device in DSM7 for now.
SERVICE_COMMAND="${SERVICE_COMMAND} --tun=userspace-networking"
fi
if [ "${SYNOPKG_DSM_VERSION_MAJOR}" -eq "6" ]; then
chown -R tailscale:tailscale "${PKGVAR}/"
fi
start_daemon() {
local ts=$(date --iso-8601=second)
echo "${ts} Starting ${SERVICE_NAME} with: ${SERVICE_COMMAND}" >${LOG_FILE}
STATE_DIRECTORY=${PKGVAR} ${SERVICE_COMMAND} 2>&1 | sed -u '1,200p;201s,.*,[further tailscaled logs suppressed],p;d' >>${LOG_FILE} &
# We pipe tailscaled's output to sed, so "$!" retrieves the PID of sed not tailscaled.
# Use jobs -p to retrieve the PID of the most recent process group leader.
jobs -p >"${PID_FILE}"
}
stop_daemon() {
if [ -r "${PID_FILE}" ]; then
local PID=$(cat "${PID_FILE}")
local ts=$(date --iso-8601=second)
echo "${ts} Stopping ${SERVICE_NAME} service PID=${PID}" >>${LOG_FILE}
kill -TERM $PID >>${LOG_FILE} 2>&1
wait_for_status 1 || kill -KILL $PID >>${LOG_FILE} 2>&1
rm -f "${PID_FILE}" >/dev/null
fi
}
daemon_status() {
if [ -r "${PID_FILE}" ]; then
local PID=$(cat "${PID_FILE}")
if ps -o pid -p ${PID} > /dev/null; then
return
fi
rm -f "${PID_FILE}" >/dev/null
fi
return 1
}
wait_for_status() {
# 20 tries
# sleeps for 1 second after each try
local counter=20
while [ ${counter} -gt 0 ]; do
daemon_status
[ $? -eq $1 ] && return
counter=$((counter - 1))
sleep 1
done
return 1
}
ensure_tun_created() {
if [ "${SYNOPKG_DSM_VERSION_MAJOR}" -eq "7" ]; then
# TODO(maisem/crawshaw): Disable the tun device in DSM7 for now.
return
fi
# Create the necessary file structure for /dev/net/tun
if ([ ! -c /dev/net/tun ]); then
if ([ ! -d /dev/net ]); then
mkdir -m 755 /dev/net
fi
mknod /dev/net/tun c 10 200
chmod 0755 /dev/net/tun
fi
# Load the tun module if not already loaded
if (!(lsmod | grep -q "^tun\s")); then
insmod /lib/modules/tun.ko
fi
}
case $1 in
start)
if daemon_status; then
exit 0
else
ensure_tun_created
start_daemon
exit $?
fi
;;
stop)
if daemon_status; then
stop_daemon
exit $?
else
exit 0
fi
;;
status)
if daemon_status; then
echo "${SERVICE_NAME} is running"
exit 0
else
echo "${SERVICE_NAME} is not running"
exit 3
fi
;;
log)
exit 0
;;
*)
echo "command $1 is not implemented"
exit 0
;;
esac