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# args: source, mountpoint
_mnt_bind() {
src="${1}"
mnt="${2}"
msg "::: Binding ${src} to ${mnt}"
mkdir -p "${mnt}"
/bin/mount -o bind "${src}" "${mnt}"
}
# args: /path/to/image_file, mountpoint
_mnt_squashfs() {
img="${1}"
mnt="${2}"
img_fullname="${img##*/}";
img_name="${img_fullname%.*}"
tmp_mnt="/tmpfs/mnt/${img_name}"
msg "::: Adding new aufs branch: ${img_name}"
mkdir -p "${tmp_mnt}"
/bin/mount -r -t squashfs "${img}" "${tmp_mnt}"
if [ "/${mnt#/*/}" = "/" ]; then
/bin/mount -t aufs -o remount,append:"${tmp_mnt}"=ro none "${mnt}"
else
_mnt_bind "${tmp_mnt}" "${mnt}"
fi
}
run_hook () {
if [ "x${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${archisodevice}" = "x" ]; then
archisodevice="/dev/archiso"
fi
# set mount handler for archiso
mount_handler="archiso_mount_handler"
}
archiso_mount_handler() {
newroot="${1}"
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 ${archisodevice} 30; do
echo "ERROR: boot device didn't show up after 30 seconds..."
echo " Falling back to interactive prompt"
echo " You can try to fix the problem manually, log out when you are finished"
launch_interactive_shell
done
FSTYPE=$(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."
fserror="0"
else
echo "ERROR: Mounting was successful, but the ${isomounts} file does not exist."
fserror="1"
fi
else
echo "ERROR; Failed to mount ${archisodevice} (FS is ${FSTYPE})"
fserror="1"
fi
else
echo "ERROR: ${archisodevice} found, but the filesystem type is unknown."
fserror="1"
fi
if [ "${fserror}" = "1" ]; then
echo " Falling back to interactive prompt"
echo " You can try to fix the problem manually, log out when you are finished"
launch_interactive_shell
fi
msg ":: Mounting root (aufs) filesystem"
/bin/mount -t aufs -o dirs=/tmpfs=rw none "${newroot}"
if [ $? -ne 0 ]; then
echo "ERROR: while mounting root (aufs) filesystem."
exit 1
fi
msg ":: Mounting images"
while read img imgarch mountpoint type; do
# check if this line is a comment (starts with #)
[ "${img#"#"}" != "${img}" ] && continue
[ "$imgarch" != "$arch" ] && continue
[ ! -r "/bootmnt/${img}" ] && continue
if [ "${type}" = "bind" ]; then
_mnt_bind "/bootmnt/${img}" "${newroot}${mountpoint}"
elif [ "${type}" = "squashfs" ]; then
_mnt_squashfs "/bootmnt/${img}" "${newroot}${mountpoint}"
fi
done < "${isomounts}"
# Bind our bootmnt dir into the live system
_mnt_bind /bootmnt "${newroot}/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
}
# vim:ft=sh:ts=4:sw=4:et:
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