#!/bin/sh

echo "Warewulf pre-init (/init)"
echo
echo "Mounting kernel file systems..."
mountpoint -q /proc || (mkdir -p /proc && mount -t proc proc /proc && echo "Mounted /proc")
mountpoint -q /dev || (mkdir -p /dev && mount -t devtmpfs devtmpfs /dev && echo "Mounted /dev")
mountpoint -q /sys || (mkdir -p /sys && mount -t sysfs sysfs /sys && echo "Mounted /sys")
echo
echo "Loading /warewulf/config..."
if [ -f "/warewulf/config" ]; then
    . /warewulf/config
else
    echo "ERROR: Warewulf configuration file not found."
    echo "Rebooting in 1 minute..."
    sleep 60
    echo b > /proc/sysrq-trigger || /sbin/reboot -f
fi
echo
echo "Configuring root file system..."

WWPRESCRIPTS=/warewulf/wwprescripts
chmod +rx "${WWPRESCRIPTS}"

WWROOT="${WWROOT:-initramfs}"
if [ "${WWROOT}" = "initramfs" ]; then
    echo "WWROOT=${WWROOT}: using initial rootfs and invoking ${WWPRESCRIPTS}..."
    exec "${WWPRESCRIPTS}"
elif [ "${WWROOT}" = "ramfs" -o "${WWROOT}" = "tmpfs" ]; then
    echo "WWROOT=${WWROOT}: setting up new ${WWROOT} rootfs (/newroot)..."
    mkdir /newroot
    mount wwroot /newroot -t ${WWROOT} -o mpol=interleave # mpol ignored for ramfs
    tar -cf - --exclude ./proc --exclude ./sys --exclude ./dev --exclude --exclude ./newroot . | tar -xf - -C /newroot
    mkdir /newroot/proc /newroot/dev /newroot/sys 2>/dev/null
    echo "Switching to new rootfs (/newroot) and invoking ${WWPRESCRIPTS}..."
    exec /sbin/switch_root /newroot "${WWPRESCRIPTS}"
else
    echo "ERROR: Unrecognized rootfs type requested: ${WWROOT}"
    echo "Rebooting in 1 minute..."
    sleep 60
    echo b > /proc/sysrq-trigger || /sbin/reboot -f
fi

echo
echo "ERROR: wwinit encountered a problem."
echo "Rebooting in 1 minute..."
sleep 60
echo b > /proc/sysrq-trigger || /sbin/reboot -f