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# args: source, mountpoint
_mnt_aufs() {
src="${1}"
mnt="${2}"
msg "::: Adding new aufs branch: ${src} to ${mnt}"
mkdir -p "${mnt}"
/bin/mount -t aufs -o remount,append:"${src}"=ro none "${mnt}"
}
# 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="/ro_branch/${img_name}"
if [ "${copytoram}" = "y" ]; then
msg -n ":: Copying squashfs image to RAM..."
/bin/cp "${img}" "/copytoram/${img_fullname}"
if [ $? -ne 0 ]; then
echo "ERROR: while copy ${img} to /copytoram/${img_fullname}"
launch_interactive_shell
fi
img="/copytoram/${img_fullname}"
msg "done."
fi
mkdir -p "${tmp_mnt}"
/bin/mount -r -t squashfs "${img}" "${tmp_mnt}"
if [ $? -ne 0 ]; then
echo "ERROR: while mounting ${img} to ${tmp_mnt}"
launch_interactive_shell
fi
if [ "/${mnt#/*/}" = "/" ]; then
_mnt_aufs "${tmp_mnt}" "${mnt}"
else
_mnt_bind "${tmp_mnt}" "${mnt}"
fi
}
run_hook() {
if [ "x${arch}" = "x" ]; then
arch="$(uname -m)"
fi
if [ "x${rw_branch_size}" = "x" ]; then
rw_branch_size="75%"
fi
if [ "x${copytoram_size}" = "x" ]; then
copytoram_size="75%"
fi
if [ "x${archisobasedir}" = "x" ]; then
archisobasedir="arch"
fi
if [ "x${isomounts}" != "x" ]; then
isomounts="/bootmnt/${isomounts}"
else
isomounts="/bootmnt/${archisobasedir}/isomounts"
fi
if [ "x${archisodevice}" = "x" ]; then
archisodevice="/dev/disk/by-label/${archisolabel}"
fi
# set mount handler for archiso
mount_handler="archiso_mount_handler"
}
archiso_mount_handler() {
newroot="${1}"
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 -p ${archisodevice} 2> /dev/null)
if [ -n "${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
if [ "${copytoram}" = "y" ]; then
msg -n ":: Mounting /copytoram (tmpfs) filesystem, size=${copytoram_size}..."
mount -t tmpfs -o "size=${copytoram_size}",mode=0755 copytoram /copytoram
msg "done."
fi
msg -n ":: Mounting rw_branch (tmpfs) filesystem, size=${rw_branch_size}..."
mount -t tmpfs -o "size=${rw_branch_size}",mode=0755 rw_branch /rw_branch
msg "done."
msg ":: Mounting root (aufs) filesystem"
/bin/mount -t aufs -o dirs=/rw_branch=rw union "${newroot}"
if [ $? -ne 0 ]; then
echo "ERROR: while mounting root (aufs) filesystem."
launch_interactive_shell
fi
msg ":: Mounting images"
while read img imgarch mountpoint type; do
# check if this line is a comment (starts with #)
[ "${img#"#"}" != "${img}" ] && continue
[ "$imgarch" != "$arch" ] && continue
[ ! -r "/bootmnt/${archisobasedir}/${img}" ] && continue
if [ "${type}" = "bind" ]; then
_mnt_bind "/bootmnt/${archisobasedir}/${img}" "${newroot}${mountpoint}"
elif [ "${type}" = "squashfs" ]; then
_mnt_squashfs "/bootmnt/${archisobasedir}/${img}" "${newroot}${mountpoint}"
fi
done < "${isomounts}"
if [ "${copytoram}" = "y" ]; then
/bin/umount /bootmnt
else
_mnt_bind /bootmnt "${newroot}/bootmnt"
fi
}
# vim:ft=sh:ts=4:sw=4:et:
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