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