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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" indeconfig)# 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 $BROADCASTip route add default via $router dev $interface# 更新 DNS 配置[ -n "$domain" ] && echo "search $domain" > $RESOLV_CONFfor i in $dns; doecho "nameserver $i" >> $RESOLV_CONFdone;;
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