tinyramfs/init

#!/usr/bin/busybox sh

# debugging
set -x

# install busybox
/usr/bin/busybox --install -s /usr/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 "/sbin/mdev" >/proc/sys/kernel/hotplug
#mdev -s

# setup udev
udevd --daemon
udevadm trigger --action=add --type=subsystems
udevadm trigger --action=add --type=devices
udevadm settle

# TODO parse /proc/cmdline

# load drivers
#modprobe -a $drivers

# merge mount flags
[ -n "$rootflags" ] && mountargs="$rootflags"
[ -n "$rootfstype" ] && mountargs="$mountargs -t $rootfstype"

# mount rootfs
mount $mountargs "$root" "/mnt/root" || panic

# clean up
udevadm control --exit

umount "/dev"
umount "/sys"
umount "/proc"

# boot system
echo SUCCESS
exec switch_root "/mnt/root" "/sbin/init"