Magisk/scripts/magisksu.sh

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#!/system/bin/sh
MODDIR=${0%/*}
LOGFILE=/cache/magisk.log
log_print() {
echo "MagiskSU: $1"
echo "MagiskSU: $1" >> $LOGFILE
log -p i -t Magisk "MagiskSU: $1"
}
log_print "Moving and linking /sbin binaries"
mount -o rw,remount rootfs /
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/dev/busybox/cp -afc /sbin /sbin_orig
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mount -o ro,remount rootfs /
log_print "Exposing su binary"
rm -rf /magisk/.core/bin $MODDIR/sbin_bind
mkdir -p $MODDIR/sbin_bind
ln -s /sbin_orig/* $MODDIR/sbin_bind
chcon -h u:object_r:rootfs:s0 $MODDIR/sbin_bind/*
chmod 755 $MODDIR/sbin_bind
ln -s $MODDIR/su $MODDIR/sbin_bind/su
mount -o bind $MODDIR/sbin_bind /sbin
log_print "Starting su daemon"
/sbin/su --daemon