bird2 init.d script with restart option

openwrt bird

#!/bin/sh /etc/rc.common
# Copyright (C) 2010-2017 OpenWrt.org

USE_PROCD=1
START=70

BIRD_BIN="/usr/sbin/bird"
BIRD_CONF="/etc/bird.conf"
BIRD_PID_FILE="/var/run/bird.pid"

start_service() {
    mkdir -p /var/run
    procd_open_instance
    procd_set_param command $BIRD_BIN -c $BIRD_CONF -P $BIRD_PID_FILE
    procd_set_param file "$BIRD_CONF"
    procd_set_param stdout 1
    procd_set_param stderr 1
    procd_set_param respawn
    procd_close_instance
}
stop_service() {
    kill $(cat $BIRD_PID_FILE)
    rm -f $BIRD_PID_FILE
}
#stop_service重新定义，退出服务器后需要做的操作

restart() {
    stop
    start
}