add mgalive dracut module based on dmsquash-live module (needs more cleaning)

1 files changed, 172 insertions, 0 deletions

diff --git a/files/90mgalive/mgalive-root.sh b/files/90mgalive/mgalive-root.sh
new file mode 100755
index 0000000..5c2a061
--- /dev/null
+++ b/files/90mgalive/mgalive-root.sh
@@ -0,0 +1,172 @@
+#!/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
+}
+
+#### 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/'
+#
+
+
+### 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 $i; done'
+rmdir /initrd/live
+#mount -o mode=0755 -t tmpfs /dev /dev
+# sh -c 'rm -rf /dev/loop'
+# sh -c 'mv /initrd/dev/* /dev/'
+
+#printf '/bin/mount %s /dev/mapper/live-rw %s\n' "$ROOTFLAGS" "$NEWROOT" > $hookdir/mount/01-$$-live.sh
+
+need_shutdown
+
+exit 0