core-admin/dom0/aux-tools/startup-dvm.sh

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#!/bin/sh
# Setup DispVM things at Qubes system startup
printf "\x00\x00\x00\x00" > /var/run/qubes/dispVM_seq
chown root:qubes /var/run/qubes/dispVM_seq
chmod 660 /var/run/qubes/dispVM_seq
DEFAULT=/var/lib/qubes/dvmdata/default_savefile
DEFAULT_CONFIG=/var/lib/qubes/dvmdata/default_dvm.conf
# setup DispVM files only when they exists
if [ -r $DEFAULT ]; then
ln -s $DEFAULT_CONFIG /var/run/qubes/current_dvm.conf
if [ -f /var/lib/qubes/dvmdata/dont_use_shm ] ; then
ln -s $DEFAULT /var/run/qubes/current_savefile
else
mkdir -m 770 /dev/shm/qubes
chown root.qubes /dev/shm/qubes
cp -a $(readlink $DEFAULT) /dev/shm/qubes/current_savefile
chown root.qubes /dev/shm/qubes/current_savefile
chmod 660 /dev/shm/qubes/current_savefile
ln -s /dev/shm/qubes/current_savefile /var/run/qubes/current_savefile
fi
fi