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|
#!/bin/sh
. /lib/dracut-lib.sh
[ -f /tmp/root.info ] && . /tmp/root.info
PATH=/usr/sbin:/usr/bin:/sbin:/bin
[ -z "$1" ] && exit 1
livedev="$1"
# Create live tree
mkdir -m 0755 -p /live/distrib
mkdir -m 0755 -p /live/media
mkdir -m 0755 -p /live/overlay
mkdir -m 0755 -p /live/union
mkdir -m 0755 -p /run/mgalive/ovlsize
# Get the base device name
basedev=$(echo $livedev | sed 's,\(/dev/sd[a-z]\)1,\1,g')
# Get the base directory for locating the loopback file. In normal use this is
# the root directory, but a multi-boot USB stick may want to override this.
basedir=$(getarg mgalive.basedir)
# Get the device or path used for persistant storage (if it exists). In normal
# use this is another partition on the same base device, but a multi-boot USB
# stick may want to override this.
overlay=$(getarg mgalive.overlay)
if [ -z "$overlay" ] ; then
overlay=`blkid -t LABEL=mgalive-persist -o device | grep $basedev`
else
overlay=$livedev$overlay
fi
if [ -z "$basedir" -a -z "$overlay" ] ; then
# Fix udev isohybrid LABEL issues (mga #3334)
# (things have moved on - this may not be needed now)
media=$basedev
else
media=$livedev
fi
info "mgalive basedev is $basedev"
info "mgalive livedev is $livedev"
info "mgalive basedir is $basedir/"
info "mgalive overlay is $overlay"
# Mount the live media
mount -n -o ro $media /live/media
# Mount the loopback filesystem
LOOPDEV=$( losetup -f )
if [ -e /live/media$basedir/loopbacks/distrib-lzma.sqfs ] ; then
# Retain support for the original draklive. Note that despite the file
# name, it uses xz compression.
losetup -r $LOOPDEV /live/media$basedir/loopbacks/distrib-lzma.sqfs
else
losetup -r $LOOPDEV /live/media$basedir/loopbacks/distrib.sqfs
fi
mount -n -t squashfs -o ro $LOOPDEV /live/distrib
mount -n -t squashfs -o ro $LOOPDEV /run/mgalive/ovlsize
# Mount the overlay filesystem
if [ -z "$overlay" ] ; then
mount -n -t tmpfs -o mode=755 none /live/overlay
else
mount -n -o noatime $overlay /live/overlay
fi
# work and memory must be on same root
mkdir -m 0755 -p /live/overlay/work
mkdir -m 0755 -p /live/overlay/memory
mount -n -t overlay overlay -o lowerdir=/live/distrib,upperdir=/live/overlay/memory,workdir=/live/overlay/work,noatime /live/union
ln -s /live/union /dev/root
printf '/bin/mount --rbind /live/union %s\n' "$NEWROOT" > $hookdir/mount/01-$$-live.sh
need_shutdown
exit 0
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