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#!/bin/sh
#
# Startup/shutdown script for the gmid gemini service.
#

GMID_USER=${GMID_USER:-root}

create_gmid_run_dir() {
  if [ ! -d /run/gmid/ ]; then
    mkdir -p /run/gmid
    chown gmid:gmid /run/gmid
  fi
}

gmid_reload()
{
  create_gmid_run_dir

  local pid="$(2>/dev/null cat /run/gmid/gmid.pid)"

  if [ -z "$pid" ] || ! kill -0 "$pid" >/dev/null; then
    echo "gmid is not running"

    return
  fi

  echo "Reloading gmid configuration"
  kill -HUP "$(cat /run/gmid/gmid.pid)"
}

gmid_start() {
  create_gmid_run_dir

  local pid="$(2>/dev/null cat /run/gmid/gmid.pid)"

  if [ -n "$pid" ] || kill -0 "$pid" 2>/dev/null; then
    echo "gmid is already running"

    return
  fi

  echo "Starting gmid gemini service"
  sudo -u "$GMID_USER" -- gmid \
      -c /etc/gmid.conf \
      -P /run/gmid/gmid.pid
}

gmid_status() {
  create_gmid_run_dir

  local pid="$(2>/dev/null cat /run/gmid/gmid.pid)"

  if [ -z "$pid" ] || ! kill -0 "$pid" 2>/dev/null; then
    echo "gmid is not running"

    return
  fi

  echo "gmid is running"
}

gmid_stop() {
  echo "Stopping gmid gemini service"
  create_gmid_run_dir

  local pid="$(2>/dev/null cat /run/gmid/gmid.pid)"

  if [ -z "$pid" ] || ! kill -0 "$pid" 2>/dev/null; then
    echo "gmid is not running"

    return
  fi

  sudo -u "$GMID_USER" -- kill -TERM "$pid"
}

case "$1" in
reload)
  gmid_reload
  ;;
start)
  gmid_start
  ;;
status)
  gmid_status
  ;;
stop)
  gmid_stop
  ;;
*)
  echo "Usage: $0 {reload|start|status|stop}"
  exit 1
esac