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# args: source, mountpoint
_mnt_bind()
{
msg "::: Binding ${1} to ${2}"
mkdir -p /real_root${2}
/bin/mount -o bind ${1} /real_root${2}
}
# args: /path/to/image_file
_mnt_squashfs()
{
/sbin/modprobe -q loop > /dev/null 2>&1
img="${1}"
base_img="${img##*/}";
mnt="${2}"
# FIX: This options does not work (see FS#17182)
if [ "${copytoram}" = "y" ]; then
msg ":: Copying squashfs image to RAM"
/bin/cat ${img} > "/tmpfs/${base_img}"
img="/tmpfs/${base_img}"
fi
msg "::: Adding new aufs branch: ${base_img%.*}"
mkdir -p "/tmpfs/mnt/loop${LOOP_NUM}"
# sometimes it takes udev a while to create device nodes
while [ ! -e "/dev/loop${LOOP_NUM}" ]; do
sleep 1
done
if ! /sbin/losetup "/dev/loop${LOOP_NUM}" ${img}; then
echo "ERROR: Cannot mount loop device /dev/loop${LOOP_NUM}"
break
fi
/bin/mount -r -t squashfs "/dev/loop${LOOP_NUM}" "/tmpfs/mnt/loop${LOOP_NUM}"
if [ "${mnt}" = "/" ]; then
/bin/mount -t aufs -o remount,append:/tmpfs/mnt/loop${LOOP_NUM}=ro none "/real_root"
else
_mnt_bind "/tmpfs/mnt/loop${LOOP_NUM}" "${mnt}"
fi
export LOOP_NUM=$(( $LOOP_NUM + 1 ))
}
run_hook ()
{
if [ "x${arch}" = "x" ]; then
arch="$(uname -m)"
fi
if [ "x${tmpfs_size}" = "x" ]; then
tmpfs_size="75%"
fi
if [ "x${isomounts}" != "x" ]; then
isomounts="/bootmnt/${isomounts}"
else
isomounts="/bootmnt/isomounts"
fi
if [ "x${archisodevice}" = "x" ]; then
archisodevice="/dev/archiso"
fi
msg -n ":: Mounting tmpfs, size=${tmpfs_size}..."
mount -t tmpfs -o "size=${tmpfs_size}" tmpfs /tmpfs
msg "done."
msg ":: Waiting for boot device..."
while ! poll_device ${archisodevice} 30; do
echo "ERROR: boot device didn't show up after 30 seconds..."
echo " Falling back to interactive prompt"
echo " You can try to fix the problem manually, log out when you are finished"
PS1="ramfs$ " /bin/sh -i
done
FSTYPE=$(blkid -o value -s TYPE ${archisodevice} 2> /dev/null)
if [ -n "${FSTYPE}" ]; then
if mount -r -t "${FSTYPE}" ${archisodevice} /bootmnt > /dev/null 2>&1; then
if [ -e "${isomounts}" ]; then
echo "SUCCESS: Mounted archiso volume successfully."
else
echo "ERROR: Mounting was successful, but the ${isomounts} file does not exist."
exit 1
fi
else
echo "ERROR; Failed to mount ${archisodevice} (FS is ${FSTYPE})"
exit 1
fi
else
echo "ERROR: ${archisodevice} found, but the filesystem type is unknown."
fi
msg ":: Mounting root (aufs) filesystem"
/bin/mount -t aufs -o dirs=/tmpfs=rw none /real_root
if [ $? -ne 0 ]; then
echo "ERROR: while mounting root (aufs) filesystem."
exit 1
fi
export LOOP_NUM="0"
msg ":: Mounting images"
while read img imgarch mountpoint type; do
# check if this line is a comment (starts with #)
[ "${img#"#"}" != "${img}" ] && continue
[ "$imgarch" != "$arch" ] && continue
[ ! -r "/bootmnt/${img}" ] && continue
if [ "${type}" = "bind" ]; then
_mnt_bind "/bootmnt/${img}" ${mountpoint}
elif [ "${type}" = "squashfs" ]; then
_mnt_squashfs "/bootmnt/${img}" "${mountpoint}"
fi
done < "${isomounts}"
# Bind our bootmnt dir into the live system
_mnt_bind /bootmnt /bootmnt
if [ "${FSTYPE}" = "iso9660" -o "${FSTYPE}" = "udf" ]; then
if [ -d /proc/sys/dev/cdrom ]; then
echo 0 > /proc/sys/dev/cdrom/lock
echo 0 > /proc/sys/dev/cdrom/autoeject
fi
fi
if [ "${break}" = "y" ]; then
echo ":: Break requested, type 'exit' to resume operation"
PS1="ramfs$ " /bin/sh -i
fi
#Special handling if udev is running
udevpid=$(/bin/pidof udevd)
if [ -n "${udevpid}" ]; then
/bin/kill -9 ${udevpid} > /dev/null 2>&1
/bin/sleep 0.01
fi
msg ":: Passing control to Arch Linux Initscripts...Please Wait"
/bin/umount /sys
/bin/umount /proc
exec /sbin/switch_root -c /dev/console /real_root /sbin/init ${CMDLINE}
}
# vim:ft=sh:ts=4:sw=4:et:
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