# This module allows the test driver to connect to the virtual machine # via a root shell attached to port 514. { config, pkgs, ... }: with pkgs.lib; let # Urgh, `socat' sets the SIGCHLD to ignore. This wreaks havoc with # some programs. rootShell = pkgs.writeScript "shell.pl" '' #! ${pkgs.perl}/bin/perl $SIG{CHLD} = 'DEFAULT'; print "\n"; exec "/bin/sh"; ''; in { config = { jobs.backdoor = { startOn = "ip-up"; stopOn = "never"; script = '' export USER=root export HOME=/root export DISPLAY=:0.0 export GCOV_PREFIX=/tmp/coverage-data source /etc/profile cd /tmp echo "connecting to host..." > /dev/ttyS0 ${pkgs.socat}/bin/socat tcp:10.0.2.6:23 exec:${rootShell} 2> /dev/ttyS0 # || poweroff -f ''; respawn = false; }; boot.postBootCommands = '' # Panic on out-of-memory conditions rather than letting the # OOM killer randomly get rid of processes, since this leads # to failures that are hard to diagnose. echo 2 > /proc/sys/vm/panic_on_oom # Coverage data is written into /tmp/coverage-data. Symlink # it to the host filesystem so that we don't need to copy it # on shutdown. ( eval $(cat /proc/cmdline) mkdir /hostfs/$hostTmpDir/coverage-data ln -s /hostfs/$hostTmpDir/coverage-data /tmp/coverage-data ) # Mount debugfs to gain access to the kernel coverage data (if # available). mount -t debugfs none /sys/kernel/debug || true ''; # If the kernel has been built with coverage instrumentation, make # it available under /proc/gcov. boot.kernelModules = [ "gcov-proc" ]; # Panic if an error occurs in stage 1 (rather than waiting for # user intervention). boot.kernelParams = [ "console=tty1" "console=ttyS0" "panic=1" "stage1panic" ]; # `xwininfo' is used by the test driver to query open windows. environment.systemPackages = [ pkgs.xorg.xwininfo ]; # Send all of /var/log/messages to the serial port. services.syslogd.extraConfig = "*.* /dev/ttyS0"; # Prevent tests from accessing the Internet. networking.defaultGateway = mkOverride 150 {} ""; networking.nameservers = mkOverride 150 {} [ ]; # Apply a patch to the kernel to increase the 15s CIFS timeout. nixpkgs.config.packageOverrides = pkgs: { linux = pkgs.linux.override (orig: { kernelPatches = orig.kernelPatches ++ [ pkgs.kernelPatches.cifs_timeout ]; }); }; }; }