增加离线升级脚本说明

scripts/autoupdate-offline.sh

@@ -0,0 +1,48 @@
+#!/bin/sh
+SHELLDIR=$(cd `dirname $0`; pwd)
+echo "shell dir $SHELLDIR"
+
+cd /mnt/mmcblk0p2
+rm -rf artifact R2S*.zip FriendlyWrt*img*
+cp $SHELLDIR/R2S-Minimal-$(date +%Y-%m-%d)-ROM.zip ./
+if [ -f /mnt/mmcblk0p2/R2S*.zip ]; then
+	echo -e '\e[92m今天固件已下载，准备解压\e[0m'
+else
+	echo -e '\e[91m今天的固件还没更新，尝试下载昨天的固件\e[0m'
+	cp $SHELLDIR/R2S-Minimal-$(date -d "@$(( $(busybox date +%s) - 86400))" +%Y-%m-%d)-ROM.zip ./
+	if [ -f /mnt/mmcblk0p2/R2S*.zip ]; then
+		echo -e '\e[92m昨天的固件已下载，准备解压\e[0m'
+	else
+		echo -e '\e[91m没找到最新的固件，脚本退出\e[0m'
+		exit 1
+	fi
+fi
+unzip R2S*.zip
+rm R2S*.zip
+if [ -f /mnt/mmcblk0p2/artifact/FriendlyWrt*.img.gz ]; then
+	pv /mnt/mmcblk0p2/artifact/FriendlyWrt*.img.gz | gunzip -dc > FriendlyWrt.img
+	echo -e '\e[92m准备解压镜像文件\e[0m'
+fi
+lodev=$(losetup -f)
+mkdir /mnt/img
+losetup -o 100663296 $lodev /mnt/mmcblk0p2/FriendlyWrt.img
+mount $lodev /mnt/img
+echo -e '\e[92m解压已完成，准备编辑镜像文件，写入备份信息\e[0m'
+cd /mnt/img
+sysupgrade -b /mnt/img/back.tar.gz
+tar zxf back.tar.gz
+echo -e '\e[92m备份文件已经写入，移除挂载\e[0m'
+rm back.tar.gz
+cd /tmp
+umount /mnt/img
+losetup -d $lodev
+echo -e '\e[92m准备重新打包\e[0m'
+zstdmt /mnt/mmcblk0p2/FriendlyWrt.img -o /tmp/FriendlyWrtupdate.img.zst
+echo -e '\e[92m打包完毕，准备刷机\e[0m'
+if [ -f /tmp/FriendlyWrtupdate.img.zst ]; then
+	echo 1 > /proc/sys/kernel/sysrq
+	echo u > /proc/sysrq-trigger || umount /
+	pv /tmp/FriendlyWrtupdate.img.zst | zstdcat | dd of=/dev/mmcblk0 conv=fsync
+	echo -e '\e[92m刷机完毕，正在重启...\e[0m'	
+	echo b > /proc/sysrq-trigger
+fi