1bbeeb0e5b
* squashfs images that will be part of read-only branchs for union mount in /
are mounted on /ro_branch/{image_name} instead of /tmpfs/mnt/{image_name}
(and avoid empty dirs on live env under /mnt)
* tmpfs that will be part of read-write branch for union mount in /
is mounted on /rw_branch instead of /tmpfs
* tmpfs that is for store *.sqfs images when copytoram=y, is mounted on
/copytoram instead of /tmpfs.sqfs
* tmpfs_size= parameter renamed to rw_branch_size=
* tmpfs_sqfs_size= parameter renamed to copytoram_size=
Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386@yahoo.com.ar>
152 lines
4.3 KiB
Bash
152 lines
4.3 KiB
Bash
# args: source, mountpoint
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_mnt_aufs() {
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src="${1}"
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mnt="${2}"
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msg "::: Adding new aufs branch: ${src} to ${mnt}"
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mkdir -p "${mnt}"
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/bin/mount -t aufs -o remount,append:"${src}"=ro none "${mnt}"
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}
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# args: source, mountpoint
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_mnt_bind() {
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src="${1}"
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mnt="${2}"
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msg "::: Binding ${src} to ${mnt}"
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mkdir -p "${mnt}"
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/bin/mount -o bind "${src}" "${mnt}"
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}
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# args: /path/to/image_file, mountpoint
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_mnt_squashfs() {
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img="${1}"
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mnt="${2}"
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img_fullname="${img##*/}";
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img_name="${img_fullname%.*}"
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tmp_mnt="/ro_branch/${img_name}"
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if [ "${copytoram}" = "y" ]; then
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msg -n ":: Copying squashfs image to RAM..."
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/bin/cp "${img}" "/copytoram/${img_fullname}"
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img="/copytoram/${img_fullname}"
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msg "done."
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fi
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mkdir -p "${tmp_mnt}"
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/bin/mount -r -t squashfs "${img}" "${tmp_mnt}"
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if [ "/${mnt#/*/}" = "/" ]; then
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_mnt_aufs "${tmp_mnt}" "${mnt}"
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else
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_mnt_bind "${tmp_mnt}" "${mnt}"
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fi
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}
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run_hook () {
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if [ "x${arch}" = "x" ]; then
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arch="$(uname -m)"
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fi
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if [ "x${rw_branch_size}" = "x" ]; then
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rw_branch_size="75%"
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fi
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if [ "x${copytoram_size}" = "x" ]; then
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copytoram_size="75%"
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fi
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if [ "x${archisobasedir}" != "x" ]; then
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archisobasedir=""
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fi
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if [ "x${isomounts}" != "x" ]; then
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isomounts="/bootmnt/${isomounts}"
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else
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isomounts="/bootmnt/${archisobasedir}/isomounts"
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fi
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if [ "x${archisodevice}" = "x" ]; then
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archisodevice="/dev/disk/by-label/${archisolabel}"
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fi
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# set mount handler for archiso
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mount_handler="archiso_mount_handler"
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}
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archiso_mount_handler() {
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newroot="${1}"
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msg ":: Waiting for boot device..."
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while ! poll_device ${archisodevice} 30; do
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echo "ERROR: boot device didn't show up after 30 seconds..."
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echo " Falling back to interactive prompt"
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echo " You can try to fix the problem manually, log out when you are finished"
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launch_interactive_shell
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done
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FSTYPE=$(blkid -o value -s TYPE -p ${archisodevice} 2> /dev/null)
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if [ -n "${FSTYPE}" ]; then
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if mount -r -t "${FSTYPE}" ${archisodevice} /bootmnt > /dev/null 2>&1; then
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if [ -e "${isomounts}" ]; then
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echo "SUCCESS: Mounted archiso volume successfully."
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fserror="0"
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else
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echo "ERROR: Mounting was successful, but the ${isomounts} file does not exist."
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fserror="1"
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fi
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else
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echo "ERROR; Failed to mount ${archisodevice} (FS is ${FSTYPE})"
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fserror="1"
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fi
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else
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echo "ERROR: ${archisodevice} found, but the filesystem type is unknown."
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fserror="1"
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fi
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if [ "${fserror}" = "1" ]; then
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echo " Falling back to interactive prompt"
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echo " You can try to fix the problem manually, log out when you are finished"
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launch_interactive_shell
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fi
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if [ "${copytoram}" = "y" ]; then
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msg -n ":: Mounting /copytoram (tmpfs) filesystem, size=${copytoram_size}..."
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mount -t tmpfs -o "size=${copytoram_size}",mode=0755 copytoram /copytoram
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msg "done."
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fi
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msg -n ":: Mounting rw_branch (tmpfs) filesystem, size=${rw_branch_size}..."
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mount -t tmpfs -o "size=${rw_branch_size}",mode=0755 rw_branch /rw_branch
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msg "done."
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msg ":: Mounting root (aufs) filesystem"
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/bin/mount -t aufs -o dirs=/rw_branch=rw none "${newroot}"
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if [ $? -ne 0 ]; then
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echo "ERROR: while mounting root (aufs) filesystem."
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exit 1
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fi
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msg ":: Mounting images"
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while read img imgarch mountpoint type; do
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# check if this line is a comment (starts with #)
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[ "${img#"#"}" != "${img}" ] && continue
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[ "$imgarch" != "$arch" ] && continue
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[ ! -r "/bootmnt/${archisobasedir}/${img}" ] && continue
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if [ "${type}" = "bind" ]; then
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_mnt_bind "/bootmnt/${archisobasedir}/${img}" "${newroot}${mountpoint}"
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elif [ "${type}" = "squashfs" ]; then
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_mnt_squashfs "/bootmnt/${archisobasedir}/${img}" "${newroot}${mountpoint}"
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fi
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done < "${isomounts}"
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if [ "${copytoram}" = "y" ]; then
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/bin/umount /bootmnt
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else
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_mnt_bind /bootmnt "${newroot}/bootmnt"
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fi
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}
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# vim:ft=sh:ts=4:sw=4:et:
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