tinyramfs/init
2020-01-05 21:01:39 +03:00

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#!/bin/busybox sh
# debugging
set -x
# install busybox
/bin/busybox --install -s /bin
panic() { echo "bruh moment :(" && sh; }
# silence is golden
#echo 0 > /proc/sys/kernel/printk
# check config
[ -f /config ] && . /config || panic
# mount pseudofs's
mount -t proc none /proc
mount -t sysfs none /sys
mount -t devtmpfs none /dev
# setup mdev
#echo "/bin/mdev" >/proc/sys/kernel/hotplug
#mdev -s
# TODO parse /proc/cmdline
# load drivers
for d in $(echo "$drivers"); do
modprobe "$d"
done
# find rootfs
# TODO busybox findfs doesn't support PART{UUID,LABEL}.
root="$(findfs $root)" || panic
[ -n "$rootflags" ] && mountargs="$rootflags"
[ -n "$rootfstype" ] && mountargs="$mountargs -t $rootfstype"
# mount rootfs
mount $mountargs "$root" "/mnt/root" || panic
# clean up
umount "/dev"
umount "/sys"
umount "/proc"
# boot system
echo SUCCESS
exec switch_root "/mnt/root" "/sbin/init"