ISO/archlive_hook

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# vim: set ft=sh:
run_hook ()
{
#Big Fat TODO... we need to add possible boot 'cheatcodes'
# as is common in most livecds. However, most of these can be handled
# in real userspace (early userspace only needs to load the squashfs
# image. That is _all_. Others will be handled in a custom rc.local/rc.conf
#This is going to get brutal...
if [ "x${ramdisk_size}" = "x" ]; then
ramdisk_size="75%"
fi
msg -n ":: Mounting tmpfs, size=${ramdisk_size}..."
mount -t tmpfs -o "size=${ramdisk_size}" tmpfs /tmpfs
mkdir /tmpfs/bootcd
msg "done."
squashfound=0
msg -n ":: Scanning for boot cdrom device..."
for cdrom in /dev/cd/*; do
if mount -r -t iso9660 "${cdrom}" /tmpfs/bootcd >/dev/null 2>&1; then
if [ -e /tmpfs/bootcd/archlive.sqfs ]; then
squashfound=1
msg "${cdrom}"
break
fi
fi
[ $squashfound -eq 0 ] && umount /tmpfs/bootcd >/dev/null 2>&1
done
if [ $squashfound -eq 0 ]; then
echo "ERROR: cannot find booted cdrom device, cannot continue..."
exit 1
fi
msg -n ":: Mounting squashfs image..."
/bin/modprobe -q squashfs >/dev/null 2>&1
mkdir -p /tmpfs/squashfs_root
if ! losetup /dev/loop0 /tmpfs/bootcd/archlive.sqfs; then
echo "ERROR: Cannot mount loop device /dev/loop0...aborting"
exit 1
fi
mount -r -t squashfs /dev/loop0 /tmpfs/squashfs_root
#mount.full -r -t squashfs -o loop /tmpfs/bootcd/squashfs_image /tmpfs/squashfs_root
msg "done."
msg -n ":: Mounting root (union) filesystem..."
/bin/modprobe -q unionfs >/dev/null 2>&1
mount -t unionfs -o dirs=/tmpfs=rw:/tmpfs/squashfs_root=ro,debug=0 none /real_root
msg "done."
if [ -d /proc/sus/dev/cdrom ]; then
echo 0 > /proc/sys/dev/cdrom/lock
echo 1 > /proc/sys/dev/cdrom/autoeject
fi
msg ":: Stopping udevd"
udevpid=$(/bin/minips -C udevd -o pid=)
[ "x${udevpid}" != "x" ] && /bin/kill -9 $udevpid
#Yep, we're bailing out here. We don't need kinit.
msg ":: Passing control to Archlinux Initscripts..."
exec /bin/run-init -c /dev/console /real_root /sbin/init ${CMDLINE}
}