Revert "autocore: ethinfo: rewritten in lua"

This reverts commit 4f056f8ef3.
Fixes: #10180, #10251

package/lean/autocore/files/arm/sbin/ethinfo

@@ -1,37 +1,39 @@
-#!/usr/bin/lua
--- Copyright (C) 2022 Tianling Shen <cnsztl@immortalwrt.org>
+#!/bin/sh
 
-local util = require "luci.util"
-local jsonc = require "luci.jsonc"
+a=$(ls /sys/class/net/*/device/uevent | grep -v wlan | awk -F '/' '{print $5}')
+b=$(echo "$a" | wc -l)
+rm -f /tmp/state/ethinfo
 
-local eth_info = {}
-local ifname, stat
-for ifname, stat in pairs(util.ubus("network.device", "status")) do
-	if ifname:match("^(eth%d+)$") == ifname then
-		local status, speed, duplex
+echo -n "[" > /tmp/state/ethinfo
 
-		status = stat.carrier and 1 or 0
+for i in $(seq 1 $b)
+do
+	h=$(echo '{"name":' )
+	c=$(echo "$a" | sed -n ${i}p)
+	d=$(ethtool $c)
 
-		if stat.speed:sub(1, 1) == "-" then
-			speed = " - "
+	e=$(echo "$d" | grep "Link detected" | awk -F: '{printf $2}' | sed 's/^[ \t]*//g')
+	if [ $e = yes ]; then
+		l=1
 	else
-			speed = stat.speed:sub(1, -2) .. "Mb/s"
-		end
+		l=0
+	fi
 
-		if stat.carrier and stat.speed:sub(-1) == "F" then
-			duplex = 1
+	f=$(echo "$d" | grep "Speed" | awk -F: '{printf $2}' | sed 's/^[ \t]*//g' | tr -d "Unknown!")
+	[ -z "$f" ] && f=" - "
+
+	g=$(echo "$d" | grep "Duplex" | awk -F: '{printf $2}' | sed 's/^[ \t]*//g')
+	if [ "$g" == "Full" ]; then
+		x=1
 	else
-			duplex = 0
-		end
+		x=0
+	fi
 
-		eth_info[#eth_info+1] = { name = ifname, status = status,
-					speed = speed, duplex = duplex }
-	end
-end
+	echo -n "$h \"$c\", \"status\": $l, \"speed\": \"$f\", \"duplex\": $x}," >> /tmp/state/ethinfo
+done
 
-table.sort(eth_info,
-	function(a, b)
-		return a.name < b.name
-	end)
+sed -i 's/.$//' /tmp/state/ethinfo
 
-print(jsonc.stringify(eth_info))
+echo -n "]" >> /tmp/state/ethinfo
+
+cat /tmp/state/ethinfo