tinyramfs/init

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#!/sbin/busybox sh
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# debugging
set -x
# install busybox
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/sbin/busybox --install -s
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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
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# TODO implement busybox mdev/mdevd
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# setup mdev
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#echo /sbin/mdev >/proc/sys/kernel/hotplug
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#mdev -s
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# setup udev
udevd --daemon
udevadm trigger --action=add --type=subsystems
udevadm trigger --action=add --type=devices
udevadm settle
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# TODO parse /proc/cmdline
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# unlock cryptsetup container
[ "$use_luks" = 1 ] && {
luks_root="$(findfs $luks_root)"
# TODO improve mapper name ( crypttab or config option )
cryptsetup $luks_args luksOpen "$luks_root" luks_root || panic
}
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# load drivers
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#modprobe -a $drivers
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# merge mount flags
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[ -n "$root_args" ] && mount_args="$root_args"
[ -n "$root_type" ] && mount_args="$mount_args -t $root_type"
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# mount rootfs
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mount $mount_args "$root" /mnt/root || panic
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# clean up
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udevadm control --exit
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umount /dev /sys /proc
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# boot system
echo SUCCESS
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exec switch_root /mnt/root /sbin/init