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#!/bin/bash

. /etc/rc.conf
. /etc/rc.d/functions
. /etc/conf.d/varnish

reload_vcl() {
  local activecfg newcfg

  if [[ -z $VARNISH_CFG ]]; then
    printf '==> ERROR: VARNISH_CFG is undefined in /etc/conf.d/varnish!\n'
    return 1
  fi

  activecfg=$(varnishadm -T localhost:6082 "vcl.list" | awk '/active/{ print $3 }')
  if [[ -z $activecfg ]]; then
    printf '==> ERROR: No active VCL found!\n'
    return 1
  fi

  printf -v newcfg 'vcl-%(%s)T' -1

  varnishadm -T localhost:6082 "vcl.load $newcfg $VARNISH_CFG" &&
  varnishadm -T localhost:6082 "vcl.use $newcfg" &&
  varnishadm -T localhost:6082 "vcl.discard $activecfg" || return 1
}

pidfile=/run/varnish.pid
if [[ -r $pidfile ]]; then
  read -r PID < "$pidfile"
    if [[ ! -d /proc/$PID ]]; then
      # stale pidfile
      unset PID
    rm -f "$pidfile"
  fi
fi

case "$1" in
  start)
    stat_busy "Starting Varnish Reverse Proxy"
    if /usr/sbin/varnishd $VARNISHD_OPTS -P "$pidfile"; then
      add_daemon varnish
      stat_done
    else
      stat_fail
      exit 1
    fi
    ;;
  stop)
    stat_busy "Stopping Varnish Reverse Proxy"
    if [[ $PID ]] && kill $PID &>/dev/null; then
      rm_daemon varnish
      stat_done
    else
      stat_fail
      exit 1
    fi
    ;;
  restart)
    $0 stop
    sleep 1
    $0 start
    ;;
  reload)
    stat_busy "Recompiling and Reloading VCL"
    reload_vcl && stat_done || stat_fail
    ;;
  *)
    echo "usage: $0 {start|stop|restart}"
  ;;
esac