initramfs init script

init (text/plain), 929 bytes, created by Jory A. Pratt on 2013-09-30 13:45:42 UTC

#!/bin/busybox sh

# Allow us to drop to a rescue shell if something goes wrong
rescue_shell() {
        echo "Something went wrong. Dropping you to a shell."
                busybox --install -s
        exec /bin/sh
}

# temporarily mount proc,sys and dev
mount -t proc none /proc
mount -t sysfs none /sys
mount -t devtmpfs none /dev 

# disable kernel messages from popping onto the screen
echo 0 > /proc/sys/kernel/printk

# clear the screen
clear

# We must unlock the partition if we are gonna continue to boot
cryptsetup -T 5 luksOpen /dev/sda3 system

# Must ensure we can mount our true root partition which is on lvm
vgscan > /dev/null
vgchange -ay > /dev/null

# Mount the root partition so we can execute switch_root
mount /dev/mapper/vg-root /newroot || rescue_shell

# Cleanup ram useage
umount /proc /dev /sys

# Boot the normal system finally
exec switch_root -c "/dev/console" /newroot /sbin/init || rescue_shell