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<section xmlns="http://docbook.org/ns/docbook"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:xi="http://www.w3.org/2001/XInclude"
version="5.0"
xml:id="sec-debugging-nixos-tests">
<title>Debugging NixOS tests</title>
<para>
Tests may fail and infrastructure offers access to inspect machine state.
</para>
<para>
To prevent test from stopping and cleaning up, insert a sleep command:
</para>
<programlisting>
$machine->succeed("sleep 84000");
</programlisting>
<para>
As soon as machine starts run as root:
</para>
<programlisting>
nix-shell -p socat --run "socat STDIO,raw,echo=0,escape=0x11 UNIX:/tmp/nix-build-vm-test-run-*.drv-0/vm-state-machine/backdoor"
</programlisting>
<para>
You may need to find the correct path, replacing <literal>/tmp</literal>, <literal>*</literal> or <literal>machine</literal>.
</para>
<para>
Press "enter" to open up console and login as "root". After you're done, press "ctrl-q" to exit the console.
</para>
</section>
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