core-admin/qvm-tools/qvm-create-default-dvm

#!/bin/sh
if [ $# != 1 -a $# != 2 ] ; then
	echo 'Usage: qvm-create-default-dvm templatename|--default-template|--used-template [script-name|--default-script]'
	exit 1
fi
export ROOT=/var/lib/qubes/dvmdata/savefile-root
TEMPLATENAME=$1
if [ "$TEMPLATENAME" = --used-template ] ; then
	if [ -e $ROOT ] ; then
		TEMPLATENAME=$(readlink $ROOT | sed -e 's/.root.img//' -e 's/.*\///')
	else
		TEMPLATENAME=--default-template
	fi
fi
if [ "$TEMPLATENAME" = --default-template ] ; then
	TEMPLATENAME=$(qubes-prefs --get default-template)
	if [ "X"$TEMPLATENAME = "X" ] ; then
		echo No default template ?
		exit 1
	fi
fi

if [ -z "$2" -o "X""$2" = "X""--default-script" ] ; then
	SCRIPTNAME="vm-default"
else
	SCRIPTNAME=$2
fi

if ! [ -d "/var/lib/qubes/vm-templates/$TEMPLATENAME" ] ; then
	echo /var/lib/qubes/vm-templates/$TEMPLATENAME is not a directory
	exit 1
fi
DVMTMPL="$TEMPLATENAME"-dvm
DVMTMPLDIR="/var/lib/qubes/appvms/$DVMTMPL"
if ! [ -d "$DVMTMPLDIR" ] ; then
	# unfortunately, currently there are reliability issues with save of a domain
	# with multiple CPUs and/or more than 4000M RAM
	if ! qvm-create --force-root --vcpus=1 --internal -t "$TEMPLATENAME" -l gray "$DVMTMPL" ; then exit 1 ; fi
	MAXMEM=`qvm-prefs --force-root $DVMTMPL|grep ^maxmem|awk '{print $3}'`
	if [ "$MAXMEM" -ge 4000 ]; then
		qvm-prefs --force-root -s $DVMTMPL maxmem 4000
	fi
fi
if ! /usr/lib/qubes/qubes-prepare-saved-domain.sh \
	"$DVMTMPL" "/var/lib/qubes/appvms/$DVMTMPL/dvm-savefile" $SCRIPTNAME ; then
	exit 1
fi
DEFAULT=/var/lib/qubes/dvmdata/default-savefile
CURRENT=/var/run/qubes/current-savefile
SHMDIR=/dev/shm/qubes
SHMCOPY=$SHMDIR/current-savefile
rm -f $ROOT $DEFAULT $CURRENT
ln -s "/var/lib/qubes/appvms/$DVMTMPL/dvm-savefile" $DEFAULT
ln -s "/var/lib/qubes/vm-templates/$TEMPLATENAME/root.img" $ROOT
if [ -f /var/lib/qubes/dvmdata/dont-use-shm ] ; then
	ln -s $DEFAULT $CURRENT
else
	mkdir -m 770 $SHMDIR 2>/dev/null
	chgrp qubes $SHMDIR 2>/dev/null
	rm -f $SHMCOPY
	cp $DEFAULT $SHMCOPY || exit 1
	chgrp qubes $SHMCOPY
	chmod 660 $SHMCOPY
	ln -s $SHMCOPY $CURRENT
fi 

if [ $(whoami) = "root" ] ; then
	chgrp qubes "$DVMTMPLDIR" "$DVMTMPLDIR"/*
	chmod 660 "$DVMTMPLDIR"/*
	chmod 770 "$DVMTMPLDIR"
fi