行业知识
安卓玩机----解锁system分区 可读写系统分区 magisk面具模块
���机教程----安卓机型解锁system分区 任意修改删除系统文件
system分区可读写
参考上个博文可以了解到解锁system分区的有关常识。但目前很多机型都在安卓12 13 基础上。其实最简单的方法就在于刷写一个解锁system分区的第三方补丁包。在面具更新不能解锁系统分区的前提下。我们也可以通过刷写一个解锁模块来达到解锁分区的目的。
官方资源下载地址在博文最后。
测试机型与信息
机型;小米11
芯片：骁龙888
安卓版本：安卓13
面具模块：Magisk Overlayfs
系统版本：miui14
操作步骤为：
解锁bl后有面具root权限。这个可以参考自己机型的解锁bl与root方法操作
然后在面具里刷入此模块。
重启后，查看模块运行开启正常。此时就可以任意系统分区读写。使用re管理器可以直观查看效果
操作效果
目前就可以任意删减系统分区文件。
部分源代码如下：
SKIPUNZIP=1if [ "$BOOTMODE" ] && [ "$KSU" ]; then ui_print "- Installing from KernelSU app" ui_print "- KernelSU version: $KSU_KERNEL_VER_CODE (kernel) + $KSU_VER_CODE (ksud)" ui_print "- Please note that KernelSU modules mount will make" ui_print " your system partitions unable to mount as rw" ui_print "- If you are using KernelSU, " ui_print " please unmount all ksu overlayfs" ui_print " when you want to modify system partitions"elif [ "$BOOTMODE" ] && [ "$MAGISK_VER_CODE" ]; then ui_print "- Installing from Magisk app"else ui_print "*********************************************************" ui_print "! Install from recovery is not supported" ui_print "! Please install from KernelSU or Magisk app" abort "*********************************************************"filoop_setup() { unset LOOPDEV local LOOP local MINORX=1 [ -e /dev/block/loop1 ] && MINORX=$(stat -Lc '%T' /dev/block/loop1) local NUM=0 while [ $NUM -lt 1024 ]; do LOOP=/dev/block/loop$NUM [ -e $LOOP ] || mknod $LOOP b 7 $((NUM * MINORX)) if losetup $LOOP "" 2>/dev/null; then LOOPDEV=$LOOP break fi NUM=$((NUM + 1)) done}randdir="$TMPDIR/.$(head -c21 /dev/urandom | base64)"mkdir -p "$randdir"ABI="$(getprop ro.product.cpu.abi)"# Fix ABI detectionif [ "$ABI" == "armeabi-v7a" ]; then ABI32=armeabi-v7aelif [ "$ABI" == "arm64" ]; then ABI32=armeabi-v7aelif [ "$ABI" == "x86" ]; then ABI32=x86elif [ "$ABI" == "x64" ] || [ "$ABI" == "x86_64" ]; then ABI=x86_64 ABI32=x86fiunzip -oj "$ZIPFILE" "libs/$ABI/overlayfs_system" -d "$TMPDIR" 1>&2chmod 777 "$TMPDIR/overlayfs_system"if ! $TMPDIR/overlayfs_system --test; then ui_print "! Kernel doesn't support overlayfs, are you sure?" abortfiui_print "- Extract files"unzip -oj "$ZIPFILE" post-fs-data.sh \ service.sh \ util_functions.sh \ mode.sh \ mount.sh \ uninstall.sh \ module.prop \ "libs/$ABI/overlayfs_system" \ -d "$MODPATH"unzip -oj "$ZIPFILE" util_functions.sh -d "/data/adb/modules/${MODPATH##*/}"ui_print "- Setup module"chmod 777 "$MODPATH/overlayfs_system"resize_img() { e2fsck -pf "" || return 1 if [ "" ]; then resize2fs "" "" || return 1 else resize2fs -M "" || return 1 fi return 0}test_mount_image() { loop_setup /data/adb/overlay [ -z "$LOOPDEV" ] && return 1 result_mnt=1 mount -t ext4 -o rw "$LOOPDEV" "$randdir" && \ "$MODPATH/overlayfs_system" --test --check-ext4 "$randdir" && result_mnt=0 # ensure that uppderdir does not override my binary rm -rf "$randdir/upper/system/bin/overlayfs_system" \ "$randdir/upper/system/bin/magic_remount_rw" \ "$randdir/upper/system/bin/magic_remount_ro" umount -l "$randdir" return $result_mnt}create_ext4_image() { dd if=/dev/zero of="" bs=1024 count=100 /system/bin/mkfs.ext4 "" && return 0 return 1}if [ ! -f "/data/adb/overlay" ] || ! test_mount_image; then rm -rf "/data/adb/overlay" ui_print "- Setup 2GB ext4 image at /data/adb/overlay" ui_print " Please wait..." if ! create_ext4_image "/data/adb/overlay" || ! resize_img "/data/adb/overlay" 2000M || ! test_mount_image; then rm -rf /data/adb/overlay abort "! Setup ext4 image failed, abort" fifimkdir -p "$MODPATH/system/bin"chcon -R u:object_r:system_file:s0 "$MODPATH/system"chmod -R 755 "$MODPATH/system"ln "$MODPATH/overlayfs_system" "$MODPATH/system/bin"ln -s "./overlayfs_system" "$MODPATH/system/bin/magic_remount_rw"ln -s "./overlayfs_system" "$MODPATH/system/bin/magic_remount_ro". "$MODPATH/util_functions.sh"support_overlayfs && rm -rf "$MODPATH/system"ui_print MODDIR="${0%/*}"
set -o standalone
export MAGISKTMP="$(magisk --path)"
chmod 777 "$MODDIR/overlayfs_system"
OVERLAYDIR="/data/adb/overlay"
OVERLAYMNT="/dev/mount_overlayfs"
MODULEMNT="/dev/mount_loop"
mv -fT /cache/overlayfs.log /cache/overlayfs.log.bak
rm -rf /cache/overlayfs.log
echo "--- Start debugging log ---" >/cache/overlayfs.log
echo "init mount namespace: $(readlink /proc/1/ns/mnt)" >>/cache/overlayfs.log
echo "current mount namespace: $(readlink /proc/self/ns/mnt)" >>/cache/overlayfs.log
mkdir -p "$OVERLAYMNT"
mkdir -p "$OVERLAYDIR"
mkdir -p "$MODULEMNT"
mount -t tmpfs tmpfs "$MODULEMNT"
loop_setup() {
unset LOOPDEV
local LOOP
local MINORX=1
[ -e /dev/block/loop1 ] && MINORX=$(stat -Lc '%T' /dev/block/loop1)
local NUM=0
while [ $NUM -lt 2048 ]; do
LOOP=/dev/block/loop$NUM
[ -e $LOOP ] || mknod $LOOP b 7 $((NUM * MINORX))
if losetup $LOOP "$1" 2>/dev/null; then
LOOPDEV=$LOOP
break
fi
NUM=$((NUM + 1))
done
}
if [ -f "$OVERLAYDIR" ]; then
loop_setup /data/adb/overlay
if [ ! -z "$LOOPDEV" ]; then
mount -o rw -t ext4 "$LOOPDEV" "$OVERLAYMNT"
ln "$LOOPDEV" /dev/block/overlayfs_loop
fi
fi
if ! "$MODDIR/overlayfs_system" --test --check-ext4 "$OVERLAYMNT"; then
echo "unable to mount writeable dir" >>/cache/overlayfs.log
exit
fi
num=0
for i in /data/adb/modules/*; do
[ ! -e "$i" ] && break;
module_name="$(basename "$i")"
if [ ! -e "$i/disable" ] && [ ! -e "$i/remove" ]; then
if [ -f "$i/overlay.img" ]; then
loop_setup "$i/overlay.img"
if [ ! -z "$LOOPDEV" ]; then
echo "mount overlayfs for module: $module_name" >>/cache/overlayfs.log
mkdir -p "$MODULEMNT/$num"
mount -o rw -t ext4 "$LOOPDEV" "$MODULEMNT/$num"
fi
num="$((num+1))"
fi
if [ "$KSU" == "true" ]; then
mkdir -p "$MODULEMNT/$num"
mount --bind "$i" "$MODULEMNT/$num"
num="$((num+1))"
fi
fi
done
OVERLAYLIST=""
for i in "$MODULEMNT"/*; do
[ ! -e "$i" ] && break;
if [ -d "$i" ] && [ ! -L "$i" ] && "$MODDIR/overlayfs_system" --test --check-ext4 "$i"; then
OVERLAYLIST="$i:$OVERLAYLIST"
fi
done
mkdir -p "$OVERLAYMNT/upper"
rm -rf "$OVERLAYMNT/worker"
mkdir -p "$OVERLAYMNT/worker"
if [ ! -z "$OVERLAYLIST" ]; then
export OVERLAYLIST="${OVERLAYLIST::-1}"
echo "mount overlayfs list: [$OVERLAYLIST]" >>/cache/overlayfs.log
fi
# overlay_system
. "$MODDIR/mode.sh"
"$MODDIR/overlayfs_system" "$OVERLAYMNT" | tee -a /cache/overlayfs.log
if [ ! -z "$MAGISKTMP" ]; then
mkdir -p "$MAGISKTMP/overlayfs_mnt"
mount --bind "$OVERLAYMNT" "$MAGISKTMP/overlayfs_mnt"
fi
umount -l "$OVERLAYMNT"
rmdir "$OVERLAYMNT"
umount -l "$MODULEMNT"
rmdir "$MODULEMNT"
rm -rf /dev/.overlayfs_service_unblock
echo "--- Mountinfo (post-fs-data) ---" >>/cache/overlayfs.log
cat /proc/mounts >>/cache/overlayfs.log
(
# block until /dev/.overlayfs_service_unblock
while [ ! -e "/dev/.overlayfs_service_unblock" ]; do
sleep 1
done
rm -rf /dev/.overlayfs_service_unblock
echo "--- Mountinfo (late_start) ---" >>/cache/overlayfs.log
cat /proc/mounts >>/cache/overlayfs.log
) &
resize_img() { e2fsck -pf "" || return 1 if [ "" ]; then resize2fs "" "" || return 1 else resize2fs -M "" || return 1 fi return 0}loop_setup() { unset LOOPDEV local LOOP local MINORX=1 [ -e /dev/block/loop1 ] && MINORX=$(stat -Lc '%T' /dev/block/loop1) local NUM=0 while [ $NUM -lt 2048 ]; do LOOP=/dev/block/loop$NUM [ -e $LOOP ] || mknod $LOOP b 7 $((NUM * MINORX)) if losetup $LOOP "" 2>/dev/null; then LOOPDEV=$LOOP break fi NUM=$((NUM + 1)) done}sizeof(){ EXTRA="" [ -z "$EXTRA" ] && EXTRA=0 [ "$EXTRA" -gt 0 ] || EXTRA=0 size="$(du -s "" | awk '{ print }')" # append more 20Mb size="$((size + EXTRA))" echo -n "$((size + 20000))"}handle() { if [ ! -L "/" ] && [ -d "/" ] && [ -d "$MODPATH/system/" ]; then rm -rf "$MODPATH/overlay/" mv -f "$MODPATH/overlay/system/" "$MODPATH/overlay" ln -s "../" "$MODPATH/overlay/system/" fi}create_ext4_image() { dd if=/dev/zero of="" bs=1024 count=100 /system/bin/mkfs.ext4 "" && return 0 return 1}support_overlayfs() {#OVERLAY_IMAGE_EXTRA - number of kb need to be added to overlay.img#OVERLAY_IMAGE_SHRINK - shrink overlay.img or not?if [ -d "$MODPATH/system" ]; then OVERLAY_IMAGE_SIZE="$(sizeof "$MODPATH/system" "$OVERLAY_IMAGE_EXTRA")" rm -rf "$MODPATH/overlay.img" create_ext4_image "$MODPATH/overlay.img" resize_img "$MODPATH/overlay.img" "${OVERLAY_IMAGE_SIZE}M" || { ui_print "! Setup failed"; return 1; } ui_print "- Created overlay image with size: $(du -shH "$MODPATH/overlay.img" | awk '{ print }')" loop_setup "$MODPATH/overlay.img" if [ ! -z "$LOOPDEV" ]; then rm -rf "$MODPATH/overlay" mkdir "$MODPATH/overlay" mount -t ext4 -o rw "$LOOPDEV" "$MODPATH/overlay" chcon u:object_r:system_file:s0 "$MODPATH/overlay" cp -afT "$MODPATH/system" "$MODPATH/overlay/system" # fix context ( cd "$MODPATH" || exit find "system" | while read line; do chcon "$(ls -Zd "$line" | awk '{ print }')" "$MODPATH/overlay/$line" if [ -e "$line/.replace" ]; then setfattr -n trusted.overlay.opaque -v y "$MODPATH/overlay/$line" fi done ) # handle partition handle vendor handle product handle system_ext umount -l "$MODPATH/overlay" if [ "$OVERLAY_IMAGE_SHRINK" == "true" ] || [ -z "$OVERLAY_IMAGE_SHRINK" ]; then ui_print "- Shrink overlay image" resize_img "$MODPATH/overlay.img" ui_print "- Overlay image new size: $(du -shH "$MODPATH/overlay.img" | awk '{ print }')" fi rm -rf "$MODPATH/overlay" return 0 fifireturn 1} 这个是一个开源的解锁系统分区资源。官方下载链接：官方开源地址
整体操作步骤还是比较简单。适合任意阶段的玩友使用。
关注我。了解一些玩机常识和基本的故障解决。
