Changes

* First, X software uses SystemV IPC shared memory to exchange data between server and application, thus you'll have to run the whole stuff in IPC namespace;

* First, X software uses SystemV IPC shared memory to exchange data between server and application, thus you'll have to run the whole stuff in IPC namespace;

* Second, in order to be restored reliably, it's recommended to run VNC server, window manager and application in a PID namespace;

* Second, in order to be restored reliably, it's recommended to run [https://tigervnc.org/ VNC server], window manager and application in a PID namespace;

* Third, when started from shell they will inherit session ID and terminal from that shell, which might block dump.

* Third, when started from shell they will inherit session ID and terminal from that shell, which might block dump.

#!/bin/bash

#!/bin/bash

set -m

set -m

Xvnc :25 -v -geometry 800x600 -i 0.0.0.0 -SecurityTypes none &

Xvnc :25 -v -geometry 800x600 -interface 0.0.0.0 -SecurityTypes none &

pid=$!

pid=$!

trap "kill $pid; wait" EXIT

trap "kill $pid; wait" EXIT