Magisk/scripts/util_functions.sh

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##########################################################################################
#
# Magisk General Utility Functions
# by topjohnwu
#
# Used in flash_script.sh, addon.d.sh, magisk module installers, and uninstaller
#
##########################################################################################
MAGISK_VERSION_STUB
SCRIPT_VERSION=$MAGISK_VER_CODE
get_outfd() {
readlink /proc/$$/fd/$OUTFD 2>/dev/null | grep /tmp >/dev/null
if [ "$?" -eq "0" ]; then
OUTFD=0
for FD in `ls /proc/$$/fd`; do
readlink /proc/$$/fd/$FD 2>/dev/null | grep pipe >/dev/null
if [ "$?" -eq "0" ]; then
ps | grep " 3 $FD " | grep -v grep >/dev/null
if [ "$?" -eq "0" ]; then
OUTFD=$FD
break
fi
fi
done
fi
}
ui_print() {
if $BOOTMODE; then
echo "$1"
else
echo -n -e "ui_print $1\n" >> /proc/self/fd/$OUTFD
echo -n -e "ui_print\n" >> /proc/self/fd/$OUTFD
fi
}
grep_prop() {
REGEX="s/^$1=//p"
shift
FILES=$@
[ -z "$FILES" ] && FILES='/system/build.prop'
sed -n "$REGEX" $FILES 2>/dev/null | head -n 1
}
getvar() {
local VARNAME=$1
local VALUE=`eval echo \$$VARNAME`
[ ! -z $VALUE ] && return
for DIR in /dev /data /cache /system; do
VALUE=`grep_prop $VARNAME $DIR/.magisk`
[ ! -z $VALUE ] && break;
done
eval $VARNAME=\$VALUE
}
find_boot_image() {
if [ -z "$BOOTIMAGE" ]; then
for BLOCK in boot_a kern-a android_boot kernel boot lnx; do
BOOTIMAGE=`find /dev/block -iname $BLOCK | head -n 1` 2>/dev/null
[ ! -z $BOOTIMAGE ] && break
done
fi
# Recovery fallback
if [ -z "$BOOTIMAGE" ]; then
for FSTAB in /etc/*fstab*; do
BOOTIMAGE=`grep -v '#' $FSTAB | grep -E '\b/boot\b' | grep -oE '/dev/[a-zA-Z0-9_./-]*'`
[ ! -z $BOOTIMAGE ] && break
done
fi
[ -L "$BOOTIMAGE" ] && BOOTIMAGE=`readlink $BOOTIMAGE`
}
is_mounted() {
if [ ! -z "$2" ]; then
cat /proc/mounts | grep $1 | grep $2, >/dev/null
else
cat /proc/mounts | grep $1 >/dev/null
fi
return $?
}
remove_system_su() {
if [ -f /system/bin/su -o -f /system/xbin/su ] && [ ! -f /su/bin/su ]; then
ui_print "! System installed root detected, mount rw :("
mount -o rw,remount /system
# SuperSU
if [ -e /system/bin/.ext/.su ]; then
mv -f /system/bin/app_process32_original /system/bin/app_process32 2>/dev/null
mv -f /system/bin/app_process64_original /system/bin/app_process64 2>/dev/null
mv -f /system/bin/install-recovery_original.sh /system/bin/install-recovery.sh 2>/dev/null
cd /system/bin
if [ -e app_process64 ]; then
ln -sf app_process64 app_process
else
ln -sf app_process32 app_process
fi
fi
rm -rf /system/.pin /system/bin/.ext /system/etc/.installed_su_daemon /system/etc/.has_su_daemon \
/system/xbin/daemonsu /system/xbin/su /system/xbin/sugote /system/xbin/sugote-mksh /system/xbin/supolicy \
/system/bin/app_process_init /system/bin/su /cache/su /system/lib/libsupol.so /system/lib64/libsupol.so \
/system/su.d /system/etc/install-recovery.sh /system/etc/init.d/99SuperSUDaemon /cache/install-recovery.sh \
/system/.supersu /cache/.supersu /data/.supersu \
/system/app/Superuser.apk /system/app/SuperSU /cache/Superuser.apk 2>/dev/null
fi
}
api_level_arch_detect() {
API=`grep_prop ro.build.version.sdk`
ABI=`grep_prop ro.product.cpu.abi | cut -c-3`
ABI2=`grep_prop ro.product.cpu.abi2 | cut -c-3`
ABILONG=`grep_prop ro.product.cpu.abi`
ARCH=arm
IS64BIT=false
if [ "$ABI" = "x86" ]; then ARCH=x86; fi;
if [ "$ABI2" = "x86" ]; then ARCH=x86; fi;
if [ "$ABILONG" = "arm64-v8a" ]; then ARCH=arm64; IS64BIT=true; fi;
if [ "$ABILONG" = "x86_64" ]; then ARCH=x64; IS64BIT=true; fi;
}
recovery_actions() {
# TWRP bug fix
mount -o bind /dev/urandom /dev/random
# Preserve environment varibles
OLD_PATH=$PATH
OLD_LD_PATH=$LD_LIBRARY_PATH
if [ ! -d $TMPDIR/bin ]; then
# Add busybox to PATH
mkdir -p $TMPDIR/bin
ln -s $MAGISKBIN/busybox $TMPDIR/bin/busybox
$MAGISKBIN/busybox --install -s $TMPDIR/bin
export PATH=$TMPDIR/bin:$PATH
fi
# Temporarily block out all custom recovery binaries/libs
mv /sbin /sbin_tmp
# Add all possible library paths
$IS64BIT && export LD_LIBRARY_PATH=/system/lib64:/system/vendor/lib64 || export LD_LIBRARY_PATH=/system/lib:/system/vendor/lib
}
recovery_cleanup() {
mv /sbin_tmp /sbin 2>/dev/null
export LD_LIBRARY_PATH=$OLD_LD_PATH
[ -z $OLD_PATH ] || export PATH=$OLD_PATH
ui_print "- Unmounting partitions"
umount -l /system 2>/dev/null
umount -l /vendor 2>/dev/null
umount -l /dev/random 2>/dev/null
}
abort() {
ui_print "$1"
$BOOTMODE || recovery_cleanup
exit 1
}
set_perm() {
chown $2:$3 $1 || exit 1
chmod $4 $1 || exit 1
[ -z $5 ] && chcon -h 'u:object_r:system_file:s0' $1 || chcon -h $5 $1
}
set_perm_recursive() {
find $1 -type d 2>/dev/null | while read dir; do
set_perm $dir $2 $3 $4 $6
done
find $1 -type f -o -type l 2>/dev/null | while read file; do
set_perm $file $2 $3 $5 $6
done
}
mktouch() {
mkdir -p ${1%/*} 2>/dev/null
[ -z $2 ] && touch $1 || echo $2 > $1
chmod 644 $1
}
request_size_check() {
reqSizeM=`du -s $1 | cut -f1`
reqSizeM=$((reqSizeM / 1024 + 1))
}
image_size_check() {
SIZE="`$MAGISKBIN/magisk --imgsize $IMG`"
curUsedM=`echo "$SIZE" | cut -d" " -f1`
curSizeM=`echo "$SIZE" | cut -d" " -f2`
curFreeM=$((curSizeM - curUsedM))
}