dmsquash-live: add dmsquash-generator

diff --git a/modules.d/90dmsquash-live/dmsquash-generator.sh b/modules.d/90dmsquash-live/dmsquash-generator.sh
new file mode 100755 (executable)
index 0000000..e386d81
--- /dev/null
+++ b/modules.d/90dmsquash-live/dmsquash-generator.sh
@@ -0,0 +1,66 @@
+#!/bin/sh
+
+type getarg >/dev/null 2>&1 || . /lib/dracut-lib.sh
+
+[ -z "$root" ] && root=$(getarg root=)
+
+# support legacy syntax of passing liveimg and then just the base root
+if getargbool 0 rd.live.image -d -y liveimg; then
+    liveroot="live:$root"
+fi
+
+if [ "${root%%:*}" = "live" ] ; then
+    liveroot=$root
+fi
+
+[ "${liveroot%%:*}" = "live" ] || exit 0
+
+case "$liveroot" in
+    live:LABEL=*|LABEL=*) \
+        root="${root#live:}"
+        root="$(echo $root | sed 's,/,\\x2f,g')"
+        root="live:/dev/disk/by-label/${root#LABEL=}"
+        rootok=1 ;;
+    live:CDLABEL=*|CDLABEL=*) \
+        root="${root#live:}"
+        root="$(echo $root | sed 's,/,\\x2f,g')"
+        root="live:/dev/disk/by-label/${root#CDLABEL=}"
+        rootok=1 ;;
+    live:UUID=*|UUID=*) \
+        root="${root#live:}"
+        root="live:/dev/disk/by-uuid/${root#UUID=}"
+        rootok=1 ;;
+    live:PARTUUID=*|PARTUUID=*) \
+        root="${root#live:}"
+        root="live:/dev/disk/by-partuuid/${root#PARTUUID=}"
+        rootok=1 ;;
+    live:PARTLABEL=*|PARTLABEL=*) \
+        root="${root#live:}"
+        root="live:/dev/disk/by-partlabel/${root#PARTLABEL=}"
+        rootok=1 ;;
+    live:/*.[Ii][Ss][Oo]|/*.[Ii][Ss][Oo])
+        root="${root#live:}"
+        root="liveiso:${root}"
+        rootok=1 ;;
+    live:/dev/*)
+        rootok=1 ;;
+    live:/*.[Ii][Mm][Gg]|/*.[Ii][Mm][Gg])
+        [ -f "${root#live:}" ] && rootok=1 ;;
+esac
+
+[ "$rootok" != "1" ] && exit 0
+
+GENERATOR_DIR="$2"
+[ -z "$GENERATOR_DIR" ] && exit 1
+
+[ -d "$GENERATOR_DIR" ] || mkdir "$GENERATOR_DIR"
+
+ROOTFLAGS="$(getarg rootflags)"
+{
+    echo "[Unit]"
+    echo "Before=initrd-root-fs.target"
+    echo "[Mount]"
+    echo "Where=/sysroot"
+    echo "What=/dev/mapper/live-rw"
+    [ -n "$ROOTFLAGS" ] && echo "Options=${ROOTFLAGS}"
+} > "$GENERATOR_DIR"/sysroot.mount