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#!/bin/busybox sh
NEWROOT=/.newroot
INITRAMFS=/run/initramfs
MEDIA=$INITRAMFS/media
LOWER=$INITRAMFS/lower
UPPER=$INITRAMFS/upper
WORK=$INITRAMFS/work
SFSIMAGE=$MEDIA/boot/rootfs.sfs
/bin/busybox --install -s /bin
clear
mkdir -p /proc /sys /run /dev
mount -t proc proc /proc
mount -t sysfs sysfs /sys
mount -t tmpfs run /run
mount -t devtmpfs dev /dev
mkdir -p $LOWER $MEDIA $UPPER $WORK $NEWROOT
exec >/dev/console </dev/console 2>&1
PRINTK="`cat /proc/sys/kernel/printk`"
echo "0" > /proc/sys/kernel/printk
# mdev
mkdir -p /etc
echo '$MODALIAS=.* 0:0 660 @modprobe "$MODALIAS"' > /etc/mdev.conf
mdev -df & pid_mdev=$!
# load kernel modules, twice
find /sys -name 'modalias' -type f -exec cat '{}' + | sort -u | xargs modprobe -b -a >/dev/null 2>&1
find /sys -name 'modalias' -type f -exec cat '{}' + | sort -u | xargs modprobe -b -a >/dev/null 2>&1
# load kernel modules required for live iso
for m in loop cdrom isofs overlay squashfs usb-storage loop fuse exfat; do
modprobe $m >/dev/null 2>&1
done
echo "Please wait..."
# figure out media
if [ -f /proc/sys/dev/cdrom/info ]; then
CDROM=$(grep name /proc/sys/dev/cdrom/info | awk -F : '{print $2}' | awk '{print $1}')
fi
while [ "$wait" != 10 ]; do
BLOCK=$(grep -E '[vsh]d' /proc/partitions | awk '{print $4}')
for i in $CDROM $BLOCK; do
mount -v -r /dev/$i $MEDIA >/dev/null 2>&1 || continue
[ -f $MEDIA/boot/livemedia ] || { umount $MEDIA; continue; }
MEDIAFOUND=1
break 2
done
wait=$(( wait + 1 ))
sleep 1
done
if [ ! "$MEDIAFOUND" ]; then
echo "Media not found even after 10 seconds"
sh
echo "Cannot go further"
sleep 99999
exit 1
fi
# mount stuffs
loopdevice=$(losetup -f)
losetup -f $SFSIMAGE
mount -r $loopdevice $LOWER
mount -t overlay overlay -o lowerdir=$LOWER,upperdir=$UPPER,workdir=$WORK $NEWROOT
if [ -f $MEDIA/boot/rootfs.gz ]; then
tar -xzaf $MEDIA/boot/rootfs.gz -C $NEWROOT
fi
kill $pid_mdev
mount --move /sys $NEWROOT/sys
mount --move /proc $NEWROOT/proc
mount --move /dev $NEWROOT/dev
mount --move /run $NEWROOT/run
# execute live script if exist
if [ -f $NEWROOT/$MEDIA/boot/live_script.sh ]; then
chroot $NEWROOT sh $MEDIA/boot/live_script.sh
fi
# switch to newroot
clear
exec /bin/switch_root $NEWROOT /sbin/init
echo "This is the end of initramfs"
echo "Nothing further, here's the shell"
/bin/busybox sh
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