96 lines
3.0 KiB
Bash
96 lines
3.0 KiB
Bash
# args: source, mountpoint
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_mnt_bind()
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{
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msg "::: Binding ${1} to ${2}"
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mkdir -p /real_root${2}
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/bin/mount -o bind ${addon_dir}/${1} /real_root${2}
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}
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# args: image file
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_mnt_squashfs()
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{
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msg "::: Adding new union branch: ${1}"
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mkdir -p "/tmpfs/mnt/loop${LOOP_NUM}"
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if ! /bin/losetup "/dev/loop${LOOP_NUM}" ${1} > /dev/null 2>&1; then
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echo "ERROR: Cannot mount loop device /dev/loop${LOOP_NUM}"
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echo " Couldn't mount all addons"
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break
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fi
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/bin/mount -r -t squashfs "/dev/loop${LOOP_NUM}" "/tmpfs/mnt/loop${LOOP_NUM}"
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/bin/mount -t unionfs -o remount,add=:/tmpfs/mnt/loop${LOOP_NUM}=ro none "/real_root"
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export LOOP_NUM=$(( $LOOP_NUM + 1 ))
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}
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run_hook ()
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{
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if [ "x${ramdisk_size}" = "x" ]; then
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ramdisk_size="75%"
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fi
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msg -n ":: Mounting tmpfs, size=${ramdisk_size}..."
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mount -t tmpfs -o "size=${ramdisk_size}" tmpfs /tmpfs
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msg "done."
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if [ "x${BOOT_MOUNT}" = "x" ]; then
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echo "ERROR: BOOT_MOUNT is not set. The boot-cd or boot-usb hook MUST"
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echo " be run before this one. This image was improperly built"
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exit 1
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fi
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base_img="${BOOT_MOUNT}/archlive.sqfs"
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if [ "${copytoram}" = "y" ]; then
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/bin/cat ${base_img} > /tmpfs/archlive.sqfs
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base_img="/tmpfs/archlive.sqfs"
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fi
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msg ":: Mounting squashfs image"
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/bin/modprobe -q squashfs >/dev/null 2>&1
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msg ":: Mounting root (union) filesystem"
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/bin/modprobe -q unionfs >/dev/null 2>&1
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/bin/mount -t unionfs -o dirs=/tmpfs=rw none /real_root
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export LOOP_NUM="0"
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addon_dir="${BOOT_MOUNT}/addons"
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# always layer default configuration
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_mnt_squashfs "${addon_dir}/default-config.sqfs"
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if [ -e "${addon_dir}/config" ]; then
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msg ":: Mounting addons"
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while read img 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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if [ "${type}" = "bind" ]; then
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_mnt_bind ${img} ${mountpoint}
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elif [ "${type}" = "squashfs" ]; then
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_mnt_squashfs "${addon_dir}/${img}"
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fi
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done < ${addon_dir}/config
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fi
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# layer the "pristine" base system image last
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_mnt_squashfs ${base_img}
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if [ -d /proc/sys/dev/cdrom ]; then
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echo 0 > /proc/sys/dev/cdrom/lock
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echo 1 > /proc/sys/dev/cdrom/autoeject
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fi
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if [ "${break}" = "y" ]; then
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echo ":: Break requested, type 'exit' to resume operation"
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echo " NOTE: klibc contains no 'ls' binary, use 'echo *' instead"
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PS1="ramfs$ " /bin/sh -i
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fi
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udevpid=$(/bin/minips -C udevd -o pid=)
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[ "x${udevpid}" != "x" ] && /bin/kill -9 $udevpid 2>&1 >/dev/null
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#Yep, we're bailing out here. We don't need kinit.
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msg ":: Passing control to Archlinux Initscripts...Please Wait"
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/bin/umount /sys
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/bin/umount /proc
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exec /bin/run-init -c /dev/console /real_root /sbin/init ${CMDLINE}
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}
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# vim:ft=sh:ts=4:sw=4:et:
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