From c7ef92382cab45449b4fff6a22f34928e775bc63 Mon Sep 17 00:00:00 2001
From: baiywt <baiywt_gj@163.com>
Date: Thu, 6 Jan 2022 14:51:49 +0800
Subject: [PATCH] Resizing filesystem at first boot

---
 .../armv8/base-files/etc/init.d/resize-rootfs |  9 +++
 .../base-files/etc/rc.d/S22resize-rootfs      |  1 +
 .../armv8/base-files/usr/bin/resize-rootfs.sh | 56 +++++++++++++++++++
 3 files changed, 66 insertions(+)
 create mode 100755 target/linux/rockchip/armv8/base-files/etc/init.d/resize-rootfs
 create mode 100755 target/linux/rockchip/armv8/base-files/etc/rc.d/S22resize-rootfs
 create mode 100755 target/linux/rockchip/armv8/base-files/usr/bin/resize-rootfs.sh

diff --git a/target/linux/rockchip/armv8/base-files/etc/init.d/resize-rootfs b/target/linux/rockchip/armv8/base-files/etc/init.d/resize-rootfs
new file mode 100755
index 0000000000..740b751499
--- /dev/null
+++ b/target/linux/rockchip/armv8/base-files/etc/init.d/resize-rootfs
@@ -0,0 +1,9 @@
+#!/bin/sh /etc/rc.common
+
+START=22
+start() {
+	rm -rf /etc/rc.d/S22resize-rootfs
+	#service resize-rootfs disable
+	/usr/bin/resize-rootfs.sh
+}
+
diff --git a/target/linux/rockchip/armv8/base-files/etc/rc.d/S22resize-rootfs b/target/linux/rockchip/armv8/base-files/etc/rc.d/S22resize-rootfs
new file mode 100755
index 0000000000..051d001b6c
--- /dev/null
+++ b/target/linux/rockchip/armv8/base-files/etc/rc.d/S22resize-rootfs
@@ -0,0 +1 @@
+../init.d/resize-rootfs
diff --git a/target/linux/rockchip/armv8/base-files/usr/bin/resize-rootfs.sh b/target/linux/rockchip/armv8/base-files/usr/bin/resize-rootfs.sh
new file mode 100755
index 0000000000..780076243d
--- /dev/null
+++ b/target/linux/rockchip/armv8/base-files/usr/bin/resize-rootfs.sh
@@ -0,0 +1,56 @@
+#!/bin/bash
+
+FDISK=$(which fdisk) || { echo "E: You must have fdisk" && exit 1; }
+LOSETUP=$(which losetup) || { echo "E: You must have losetup" && exit 1; }
+roottype=$(findmnt -n -o SOURCE / -o FSTYPE)
+case ${roottype} in
+	overlay)
+		FSCKEXT4=$(which fsck.ext4) || { echo "E: You must have fsck.ext4" && exit 1; }
+		RESIZE2FS=$(which resize2fs) || { echo "E: You must have resize2fs" && exit 1; }
+		rootsource=$(findmnt -n -o SOURCE /rom)			# i.e. /dev/mmcblk0p2
+		rootdevice=${rootsource%p*}				# i.e. /dev/mmcblk0
+		partitions=${rootsource##*p}
+
+		# Resizing partitions
+		lastsector=$(${FDISK} -l ${rootdevice} |grep "Disk ${rootdevice}" |awk '{print $7}')
+		lastsector=$(( $lastsector - 1 ))
+		startfrom=$(${FDISK} -l ${rootdevice} |grep ${rootsource} |awk '{print $2}')
+		partend=$(${FDISK} -l ${rootdevice} |grep ${rootsource} |awk '{print $3}')
+		[[ $lastsector -eq $partend ]] && exit 0
+		(echo d; echo $partitions; echo n; echo p; echo ; echo $startfrom; echo $lastsector ; echo w;) | fdisk $rootdevice
+		# Start resizing filesystem
+		LOOP="$(losetup -n -O NAME | sort | sed -n -e "1p")"
+		ROOT="$(losetup -n -O BACK-FILE ${LOOP} | sed -e "s|^|/dev|")"
+		OFFS="$(losetup -n -O OFFSET ${LOOP})"
+		LOOP="$(losetup -f)"
+		${LOSETUP} -o ${OFFS} ${LOOP} ${ROOT}
+		${FSCKEXT4} -y ${LOOP}
+		${RESIZE2FS} ${LOOP}
+		reboot
+		;;
+	ext4)
+		FSCKEXT4=$(which fsck.ext4) || { echo "E: You must have fsck.ext4" && exit 1; }
+		RESIZE2FS=$(which resize2fs) || { echo "E: You must have resize2fs" && exit 1; }
+		rootsource=$(findmnt -n -o SOURCE / | sed 's~\[.*\]~~')		# i.e. /dev/mmcblk0p2
+		rootdevice=${rootsource%p*}					# i.e. /dev/mmcblk0
+		partitions=${rootsource##*p}
+
+		# Resizing partitions
+		lastsector=$(${FDISK} -l ${rootdevice} |grep "Disk ${rootdevice}" |awk '{print $7}')
+		lastsector=$(( $lastsector - 1 ))
+		startfrom=$(${FDISK} -l ${rootdevice} |grep ${rootsource} |awk '{print $2}')
+		partend=$(${FDISK} -l ${rootdevice} |grep ${rootsource} |awk '{print $3}')
+		[[ $lastsector -eq $partend ]] && exit 0
+		(echo d; echo $partitions; echo n; echo p; echo ; echo $startfrom; echo $lastsector ; echo w;) | fdisk $rootdevice
+
+		# Start resizing filesystem
+		LOOP="$(losetup -f)"
+		${LOSETUP} ${LOOP} ${rootsource}
+		${FSCKEXT4} -y ${LOOP}
+		${RESIZE2FS} ${LOOP}
+		reboot
+		;;
+esac
+
+exit 0
+