linux 板子的wifi模块连上路由器后，用udhcpc给板子wifi分配ip，udhcpc获取到ip,但没有写入wlan0网卡上

linux 板子的wifi模块连上路由器后，用udhcpc给板子wifi分配ip，udhcpc获取到ip,但没有写入wlan0网卡上

这里的问题是

/usr/share/udhcpc/default.script脚本有问题

用下面正确脚本，即可写进去

#!/bin/sh

# udhcpc script for busybox
# Copyright (C) 2006 by Robert Schwebel <r.schwebel@pengutronix.de>
# Licensed under GPLv2, see file LICENSE for details.

[ -z "$1" ] && echo "Error: should be called from udhcpc" && exit 1

# 设置环境变量
RESOLV_CONF="/etc/resolv.conf"  # DNS 配置文件路径
[ -n "$broadcast" ] && BROADCAST="broadcast $broadcast"
[ -n "$subnet" ] && NETMASK="netmask $subnet"

# 根据不同的 DHCP 事件执行不同的操作
case "$1" in
    deconfig)
        # 释放 IP 地址时，清空网卡配置
        ip addr flush dev $interface
        ;;

    renew|bound)
        # 获取到 IP 地址时，配置网卡
        ip addr add $ip/$mask dev $interface $BROADCAST
        ip route add default via $router dev $interface

        # 更新 DNS 配置
        [ -n "$domain" ] && echo "search $domain" > $RESOLV_CONF
        for i in $dns; do
            echo "nameserver $i" >> $RESOLV_CONF
        done
        ;;
esac

exit 0