From 1edfde0e4f09deb89c4d52bae421695892bca2b2 Mon Sep 17 00:00:00 2001
From: Thomas Backlund <tmb@mageia.org>
Date: Thu, 5 Apr 2012 23:02:19 +0000
Subject: add the cleaned working mgalive dracut module

---
 files/90mgalive/mgalive-root.sh | 169 ++++------------------------------------
 1 file changed, 14 insertions(+), 155 deletions(-)

(limited to 'files/90mgalive/mgalive-root.sh')

diff --git a/files/90mgalive/mgalive-root.sh b/files/90mgalive/mgalive-root.sh
index 5c2a061..0d05e97 100755
--- a/files/90mgalive/mgalive-root.sh
+++ b/files/90mgalive/mgalive-root.sh
@@ -1,171 +1,30 @@
 #!/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
-type det_fs >/dev/null 2>&1 || . /lib/fs-lib.sh
 
 [ -f /tmp/root.info ] && . /tmp/root.info
 
 PATH=/usr/sbin:/usr/bin:/sbin:/bin
 
-if getargbool 0 rd.live.debug -y rdlivedebug; then
-    exec > /tmp/liveroot.$$.out
-    exec 2>> /tmp/liveroot.$$.out
-    set -x
-fi
-
 [ -z "$1" ] && exit 1
 livedev="$1"
 
-# parse various live image specific options that make sense to be
-# specified as their own things
-live_dir=$(getarg rd.live.dir live_dir)
-[ -z "$live_dir" ] && live_dir="loopbacks"
-getargbool 0 rd.live.ram -y live_ram && live_ram="yes"
-getargbool 0 rd.live.overlay.reset -y reset_overlay && reset_overlay="yes"
-getargbool 0 rd.live.overlay.readonly -y readonly_overlay && readonly_overlay="--readonly" || readonly_overlay=""
-overlay=$(getarg rd.live.overlay overlay)
-
-# CD/DVD media check
-[ -b $livedev ] && fs=$(blkid -s TYPE -o value $livedev)
-if [ "$fs" = "iso9660" -o "$fs" = "udf" ]; then
-    check="yes"
-fi
-getarg rd.live.check check || check=""
-if [ -n "$check" ]; then
-    [ -x /bin/plymouth ] && /bin/plymouth --hide-splash
-    checkisomd5 --verbose $livedev || :
-    if [ $? -ne 0 ]; then
-        die "CD check failed!"
-        exit 1
-    fi
-    [ -x /bin/plymouth ] && /bin/plymouth --show-splash
-fi
-
-# determine filesystem type for a filesystem image
-det_img_fs() {
-    blkid -s TYPE -u noraid -o value "$1"
-}
-
-for arg in $CMDLINE; do case $arg in ro|rw) liverw=$arg ;; esac; done
-# set up paths that we expect
-mkdir -m 0755 -p /live/{distrib,media,memory,union}
-if [ -f $livedev ]; then
-    # no mount needed - we've already got the LiveOS image in initramfs
-    # check filesystem type and handle accordingly
-    fstype=$(det_img_fs $livedev)
-    case $fstype in
-        squashfs) SQUASHED=$livedev;;
-        auto) die "cannot mount live image (unknown filesystem type)" ;;
-        *) FSIMG=$livedev ;;
-    esac
-    [ -e /sys/fs/$fstype ] || modprobe $fstype
-else
-    mount -n -t $fstype -o ${liverw:-ro} $livedev /live
-    if [ "$?" != "0" ]; then
-        die "Failed to mount block device of live image"
-        exit 1
-    fi
-fi
-
-# overlay setup helper function
-do_live_overlay() {
-    # create a sparse file for the overlay
-    # overlay: if non-ram overlay searching is desired, do it,
-    #              otherwise, create traditional overlay in ram
-    OVERLAY_LOOPDEV=$( losetup -f )
-
-    l=$(blkid -s LABEL -o value $livedev) || l=""
-    u=$(blkid -s UUID -o value $livedev) || u=""
-
-    if [ -z "$overlay" ]; then
-        pathspec="/${live_dir}/overlay-$l-$u"
-    elif ( echo $overlay | grep -q ":" ); then
-        # pathspec specified, extract
-        pathspec=$( echo $overlay | sed -e 's/^.*://' )
-    fi
-
-    if [ -z "$pathspec" -o "$pathspec" = "auto" ]; then
-        pathspec="/${live_dir}/overlay-$l-$u"
-    fi
-    devspec=$( echo $overlay | sed -e 's/:.*$//' )
-
-    # need to know where to look for the overlay
-    setup=""
-    if [ -n "$devspec" -a -n "$pathspec" -a -n "$overlay" ]; then
-        mkdir -m 0755 /run/initramfs/overlayfs
-        mount -n -t auto $devspec /run/initramfs/overlayfs || :
-        if [ -f /run/initramfs/overlayfs$pathspec -a -w /run/initramfs/overlayfs$pathspec ]; then
-            losetup $OVERLAY_LOOPDEV /run/initramfs/overlayfs$pathspec
-            if [ -n "$reset_overlay" ]; then
-                dd if=/dev/zero of=$OVERLAY_LOOPDEV bs=64k count=1 2>/dev/null
-            fi
-            setup="yes"
-        fi
-        umount -l /run/initramfs/overlayfs || :
-    fi
-
-    if [ -z "$setup" ]; then
-        if [ -n "$devspec" -a -n "$pathspec" ]; then
-            warn "Unable to find persistent overlay; using temporary"
-            sleep 5
-        fi
-
-        dd if=/dev/null of=/overlay bs=1024 count=1 seek=$((512*1024)) 2> /dev/null
-        losetup $OVERLAY_LOOPDEV /overlay
-    fi
-
-    # set up the snapshot
-    echo 0 `blockdev --getsz $BASE_LOOPDEV` snapshot $BASE_LOOPDEV $OVERLAY_LOOPDEV p 8 | dmsetup create $readonly_overlay live-rw
-}
-
-# live cd helper function
-do_live_from_base_loop() {
-#    do_live_overlay
-}
+# create live tree
+mkdir -m 0755 -p /live/media
+mkdir -m 0755 -p /live/distrib
+mkdir -m 0755 -p /live/memory
+mkdir -m 0755 -p /live/union
 
-#### OLD NASH LOAD from Mga1 livecds
-# nash-mount -o ro -t iso9660 LABEL=Livecd-1-GNOME /live/media
-# /bin/losetup /dev/loop0 /live/media/loopbacks/distrib-lzma.sqfs
-# nash-mount -o ro -t squashfs /dev/loop0 /live/distrib
-# mount -t tmpfs -o mode=755 /live/memory /live/memory
-# sh -c 'mount -o dirs=/live/memory=rw:/live/distrib=ro -t unionfs unionfs /live/union'
-# plymouth --newroot=/live/union
-# echo 0x0100 > /proc/sys/kernel/real-root-dev
-# umount /sys
-# sh -c 'umount /proc/bus/usb 2>/dev/null'
-# umount /proc
-# pivot_root /live/union /live/union/initrd
-# sh -c 'rmdir /initrd/live/union'
-# sh -c 'cd /initrd/live; for i in `ls -1`; do [ -d $i ] || continue; mkdir -p /live/$i; mount -n --move $i /live/$i; rmdir $i; done'
-# rmdir /initrd/live
-# nash-mount -o mode=0755 -t tmpfs /dev /dev
-# sh -c 'rm -rf /dev/loop'
-# sh -c 'mv /initrd/dev/* /dev/'
-#
+# mount the livecd
+mount -n -t iso9660 -o ro $livedev /live/media
 
+LOOPDEV=$( losetup -f )
+losetup -r $LOOPDEV /live/media/loopbacks/distrib-lzma.sqfs
+mount -n -t squashfs -o ro $LOOPDEV /live/distrib
+mount -n -t tmpfs -o mode=755 /live/memory /live/memory
+mount -n -t unionfs -o dirs=/live/memory=rw:/live/distrib=ro unionfs /live/union
 
-### FIXME ### DONT HARDCODE MEDIA NAME
-mount -o ro -t iso9660 /dev/disk/by-label/LiveCD-2-KDE4 /live/media
-losetup /dev/loop0 /live/media/loopbacks/distrib-lzma.sqfs
-mount -o ro -t squashfs /dev/loop0 /live/distrib
-mount -t tmpfs -o mode=755 /live/memory /live/memory
-sh -c 'mount -o dirs=/live/memory=rw:/live/distrib=ro -t unionfs unionfs /live/union'
-plymouth --newroot=/live/union
-echo 0x0100 > /proc/sys/kernel/real-root-dev
-umount /sys
-sh -c 'umount /proc/bus/usb 2>/dev/null'
-umount /proc
-pivot_root /live/union /live/union/initrd
-sh -c 'rmdir /initrd/live/union'
-sh -c 'cd /initrd/live; for i in `ls -1`; do [ -d $i ] || continue; mkdir -p /live/$i; mount -n --move $i /live/$i; rmdir $i; done'
-rmdir /initrd/live
-#mount -o mode=0755 -t tmpfs /dev /dev
-# sh -c 'rm -rf /dev/loop'
-# sh -c 'mv /initrd/dev/* /dev/'
+ln -s /live/union /dev/root
 
-#printf '/bin/mount %s /dev/mapper/live-rw %s\n' "$ROOTFLAGS" "$NEWROOT" > $hookdir/mount/01-$$-live.sh
+printf '/bin/mount --move /live/union %s\n' "$NEWROOT" > $hookdir/mount/01-$$-live.sh
 
 need_shutdown
 
-- 
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