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{% calculate chmod='755' %}
#!/bin/sh
# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
# ex: ts=8 sw=4 sts=4 et filetype=sh
type getarg >/dev/null 2>&1 || . /lib/dracut-lib.sh
PATH=/usr/sbin:/usr/bin:/sbin:/bin
live_dir=$(getarg rd.live.dir -d live_dir )
squash_image=$(getarg rd.live.squashimg -d loop)
[ -z "$squash_image" ] && squash_image="livecd.squashfs"
getargbool 0 rd.live.ram -d -y live_ram -d -y docache && live_ram="yes"
# we might have an embedded fs image on squashfs (compressed live)
if [ -e /run/initramfs/live/${live_dir}/${squash_image} ]; then
SQUASHED="/run/initramfs/live/${live_dir}/${squash_image}"
fi
do_cache() {
allmemory=0
for i in $(cat /proc/meminfo | grep -e ^MemFree -e ^Cached | \
cut -d: -f2 | cut -dk -f1 | sed -e "s/^\s*//") ;
do
allmemory=$((${allmemory} + $i))
done
# getting size tmpfs of default
let curtfs=${allmemory}/2
# getting size of image
let imagesize=`ls -la ${SQUASHED} | sed -r -n 's/(\S*\s*){4}(\S*).*/\2/p'`/20000*21
let addon=${imagesize}/7
if [[ ${curtfs} -gt $(( ${imagesize} + ${addon} )) ]];
then
newsize=${curtfs}
else
newsize=$(( ${addon} + ${imagesize} ))
fi
if [[ ${newsize} -lt ${allmemory} ]];
then
LIVECACHE=/run/initramfs/livecache
mkdir -m 0755 -p $LIVECACHE
mount -o remount,size=${newsize}k -t tmpfs tmpfs /run
echo "Copying live image to RAM..."
echo "(this may take a few minutes)"
dd if=$SQUASHED of=${LIVECACHE}/livecd.squashfs bs=512 2> /dev/null
if [ $? -ne 0 ]
then
bad_msg "Failed to cache the loop file! Lack of space?"
umount ${LIVECACHE}
else
SQUASHED="${LIVECACHE}/livecd.squashfs"
echo "Unmounting media from /var/initramfs/live"
umount -nd /run/initramfs/live
[[ -d /run/initramfs/isoscan ]] && umount -nd /run/initramfs/isoscan
fi
else
echo "Too low memory for cache the loop file." 1>&2
fi
}
if [ -e "$SQUASHED" ] ; then
if [ -n "$live_ram" ] ; then
do_cache
fi
SQUASHED_LOOPDEV=$( losetup -f )
losetup -r $SQUASHED_LOOPDEV $SQUASHED
mkdir -m 0755 -p /run/initramfs/squashfs
mount -n -t squashfs -o ro $SQUASHED_LOOPDEV /run/initramfs/squashfs
fi
ROOTFLAGS="$(getarg rootflags)"
if [ -n "$ROOTFLAGS" ]; then
ROOTFLAGS="-o $ROOTFLAGS"
else
ROOTFLAGS="-o udba=reval,br:/overlay=rw,/run/initramfs/squashfs=ro"
fi
ln -s ${SQUASHED_LOOPDEV} /dev/mapper/live-rw
{% if pkg() >= '045' %}
ln -s ${SQUASHED_LOOPDEV} /run/rootfsbase
{% endif %}
{% if pkg() >= '049' %}
ln -s ${SQUASHED_LOOPDEV} /dev/root
{% endif %}
need_shutdown
exit 0