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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()
{
/bin/modprobe -q loop >/dev/null 2>&1
img="${1}"
base_img="${img##*/}";
mnt="${2}"
if [ "${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${LOOP_NUM}" ]; do
sleep 1
done
if ! /bin/losetup "/dev/loop${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="$(uname -m)"
fi
if [ "x${ramdisk_size}" = "x" ]; then
ramdisk_size="75%"
fi
msg -n ":: Mounting tmpfs, size=${ramdisk_size}..."
mount -t tmpfs -o "size=${ramdisk_size}" tmpfs /tmpfs
msg "done."
msg ":: Waiting for boot device..."
/bin/mkdir -p /bootmnt
while ! poll_device /dev/archiso 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
eval $(fstype < /dev/archiso 2>/dev/null)
if [ -n "${FSTYPE}" ]; then
if [ "${FSTYPE}" = "unknown" ]; then
# First try mounting then with vfat, maybe someone put the image on
# USB stick with unetbootin or similar. vfat is not detected by fstype.
_FSTYPE="vfat"
else
_FSTYPE=$FSTYPE
fi
if mount -r -t "${_FSTYPE}" /dev/archiso /bootmnt >/dev/null 2>&1; then
if [ -e "/bootmnt/isomounts" ]; then
echo "SUCCESS: Mounted archiso volume successfully."
else
echo "ERROR: Mounting was successful, but the isomounts file does not exist."
exit 1
fi
else
if [ "${FSTYPE}" = "unknown" ]; then
echo "ERROR: Failed to mount /dev/archiso (FS is unknown and not vfat)."
else
echo "ERROR; Failed to mount /dev/archiso (FS is ${FSTYPE}."
fi
exit 1
fi
else
echo "ERROR: /dev/archiso found, but the filesystem type is unknown."
fi
/bin/modprobe -q squashfs >/dev/null 2>&1
/bin/modprobe -q aufs >/dev/null 2>&1
msg ":: Mounting root (aufs) filesystem"
/bin/mount -t aufs -o dirs=/tmpfs=rw none /real_root
export LOOP_NUM="0"
msg ":: Mounting images"
while read img imgarch mountpoint type; do
# check if this line is a comment (starts with #)
[ "${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 < "/bootmnt/isomounts"
# Bind our bootmnt dir into the live system
_mnt_bind /bootmnt /bootmnt
if [ -d /proc/sys/dev/cdrom ]; then
echo 0 > /proc/sys/dev/cdrom/lock
echo 0 > /proc/sys/dev/cdrom/autoeject
fi
if [ "${break}" = "y" ]; then
echo ":: Break requested, type 'exit' to resume operation"
echo " NOTE: klibc contains no 'ls' binary, use 'echo *' instead"
PS1="ramfs$ " /bin/sh -i
fi
udevpid=$(/bin/minips -C udevd -o pid=)
[ "x${udevpid}" != "x" ] && /bin/kill -9 $udevpid 2>&1 >/dev/null
#Yep, we're bailing out here. We don't need kinit.
msg ":: Passing control to Arch Linux Initscripts...Please Wait"
/bin/umount /sys
/bin/umount /proc
exec /bin/run-init -c /dev/console /real_root /sbin/init ${CMDLINE}
}
# vim:ft=sh:ts=4:sw=4:et:
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