mirror of
https://github.com/NixOS/nixpkgs.git
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d2144755a4
When IPXE tests were added, an option was added for configuring only the frontend, and the backend configuration was dropped entirely. This caused most installer tests to fail.
735 lines
20 KiB
Perl
735 lines
20 KiB
Perl
package Machine;
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use strict;
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use threads;
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use Socket;
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use IO::Handle;
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use POSIX qw(dup2);
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use FileHandle;
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use Cwd;
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use File::Basename;
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use File::Path qw(make_path);
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use File::Slurp;
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use Time::HiRes qw(clock_gettime CLOCK_MONOTONIC);
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my $showGraphics = defined $ENV{'DISPLAY'};
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my $sharedDir;
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sub new {
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my ($class, $args) = @_;
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my $startCommand = $args->{startCommand};
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my $name = $args->{name};
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if (!$name) {
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$startCommand =~ /run-(.*)-vm$/ if defined $startCommand;
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$name = $1 || "machine";
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}
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if (!$startCommand) {
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# !!! merge with qemu-vm.nix.
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my $netBackend = "-netdev user,id=net0";
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my $netFrontend = "-device virtio-net-pci,netdev=net0";
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$netBackend .= "," . $args->{netBackendArgs}
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if defined $args->{netBackendArgs};
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$netFrontend .= "," . $args->{netFrontendArgs}
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if defined $args->{netFrontendArgs};
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$startCommand =
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"qemu-kvm -m 384 $netBackend $netFrontend \$QEMU_OPTS ";
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if (defined $args->{hda}) {
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if ($args->{hdaInterface} eq "scsi") {
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$startCommand .= "-drive id=hda,file="
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. Cwd::abs_path($args->{hda})
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. ",werror=report,if=none "
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. "-device scsi-hd,drive=hda ";
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} else {
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$startCommand .= "-drive file=" . Cwd::abs_path($args->{hda})
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. ",if=" . $args->{hdaInterface}
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. ",werror=report ";
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}
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}
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$startCommand .= "-cdrom $args->{cdrom} "
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if defined $args->{cdrom};
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$startCommand .= "-device piix3-usb-uhci -drive id=usbdisk,file=$args->{usb},if=none,readonly -device usb-storage,drive=usbdisk "
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if defined $args->{usb};
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$startCommand .= "-bios $args->{bios} "
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if defined $args->{bios};
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$startCommand .= $args->{qemuFlags} || "";
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}
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my $tmpDir = $ENV{'TMPDIR'} || "/tmp";
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unless (defined $sharedDir) {
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$sharedDir = $tmpDir . "/xchg-shared";
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make_path($sharedDir, { mode => 0700, owner => $< });
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}
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my $allowReboot = 0;
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$allowReboot = $args->{allowReboot} if defined $args->{allowReboot};
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my $self = {
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startCommand => $startCommand,
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name => $name,
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allowReboot => $allowReboot,
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booted => 0,
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pid => 0,
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connected => 0,
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socket => undef,
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stateDir => "$tmpDir/vm-state-$name",
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monitor => undef,
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log => $args->{log},
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redirectSerial => $args->{redirectSerial} // 1,
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};
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mkdir $self->{stateDir}, 0700;
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bless $self, $class;
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return $self;
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}
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sub log {
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my ($self, $msg) = @_;
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$self->{log}->log($msg, { machine => $self->{name} });
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}
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sub nest {
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my ($self, $msg, $coderef, $attrs) = @_;
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$self->{log}->nest($msg, $coderef, { %{$attrs || {}}, machine => $self->{name} });
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}
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sub name {
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my ($self) = @_;
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return $self->{name};
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}
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sub stateDir {
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my ($self) = @_;
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return $self->{stateDir};
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}
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sub start {
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my ($self) = @_;
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return if $self->{booted};
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$self->log("starting vm");
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# Create a socket pair for the serial line input/output of the VM.
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my ($serialP, $serialC);
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socketpair($serialP, $serialC, PF_UNIX, SOCK_STREAM, 0) or die;
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# Create a Unix domain socket to which QEMU's monitor will connect.
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my $monitorPath = $self->{stateDir} . "/monitor";
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unlink $monitorPath;
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my $monitorS;
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socket($monitorS, PF_UNIX, SOCK_STREAM, 0) or die;
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bind($monitorS, sockaddr_un($monitorPath)) or die "cannot bind monitor socket: $!";
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listen($monitorS, 1) or die;
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# Create a Unix domain socket to which the root shell in the guest will connect.
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my $shellPath = $self->{stateDir} . "/shell";
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unlink $shellPath;
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my $shellS;
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socket($shellS, PF_UNIX, SOCK_STREAM, 0) or die;
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bind($shellS, sockaddr_un($shellPath)) or die "cannot bind shell socket: $!";
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listen($shellS, 1) or die;
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# Start the VM.
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my $pid = fork();
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die if $pid == -1;
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if ($pid == 0) {
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close $serialP;
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close $monitorS;
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close $shellS;
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if ($self->{redirectSerial}) {
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open NUL, "</dev/null" or die;
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dup2(fileno(NUL), fileno(STDIN));
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dup2(fileno($serialC), fileno(STDOUT));
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dup2(fileno($serialC), fileno(STDERR));
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}
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$ENV{TMPDIR} = $self->{stateDir};
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$ENV{SHARED_DIR} = $sharedDir;
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$ENV{USE_TMPDIR} = 1;
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$ENV{QEMU_OPTS} =
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($self->{allowReboot} ? "" : "-no-reboot ") .
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"-monitor unix:./monitor -chardev socket,id=shell,path=./shell " .
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"-device virtio-serial -device virtconsole,chardev=shell " .
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"-device virtio-rng-pci " .
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($showGraphics ? "-serial stdio" : "-nographic") . " " . ($ENV{QEMU_OPTS} || "");
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chdir $self->{stateDir} or die;
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exec $self->{startCommand};
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die "running VM script: $!";
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}
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# Process serial line output.
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close $serialC;
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threads->create(\&processSerialOutput, $self, $serialP)->detach;
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sub processSerialOutput {
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my ($self, $serialP) = @_;
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while (<$serialP>) {
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chomp;
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s/\r$//;
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print STDERR $self->{name}, "# $_\n";
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$self->{log}->{logQueue}->enqueue({msg => $_, machine => $self->{name}}); # !!!
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}
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}
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eval {
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local $SIG{CHLD} = sub { die "QEMU died prematurely\n"; };
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# Wait until QEMU connects to the monitor.
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accept($self->{monitor}, $monitorS) or die;
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# Wait until QEMU connects to the root shell socket. QEMU
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# does so immediately; this doesn't mean that the root shell
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# has connected yet inside the guest.
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accept($self->{socket}, $shellS) or die;
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$self->{socket}->autoflush(1);
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};
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die "$@" if $@;
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$self->waitForMonitorPrompt;
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$self->log("QEMU running (pid $pid)");
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$self->{pid} = $pid;
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$self->{booted} = 1;
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}
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# Send a command to the monitor and wait for it to finish. TODO: QEMU
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# also has a JSON-based monitor interface now, but it doesn't support
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# all commands yet. We should use it once it does.
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sub sendMonitorCommand {
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my ($self, $command) = @_;
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$self->log("sending monitor command: $command");
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syswrite $self->{monitor}, "$command\n";
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return $self->waitForMonitorPrompt;
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}
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# Wait until the monitor sends "(qemu) ".
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sub waitForMonitorPrompt {
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my ($self) = @_;
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my $res = "";
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my $s;
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while (sysread($self->{monitor}, $s, 1024)) {
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$res .= $s;
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last if $res =~ s/\(qemu\) $//;
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}
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return $res;
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}
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# Call the given code reference repeatedly, with 1 second intervals,
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# until it returns 1 or a timeout is reached.
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sub retry {
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my ($coderef) = @_;
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my $n;
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for ($n = 899; $n >=0; $n--) {
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return if &$coderef($n);
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sleep 1;
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}
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die "action timed out after $n seconds";
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}
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sub connect {
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my ($self) = @_;
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return if $self->{connected};
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$self->nest("waiting for the VM to finish booting", sub {
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$self->start;
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my $now = clock_gettime(CLOCK_MONOTONIC);
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local $SIG{ALRM} = sub { die "timed out waiting for the VM to connect\n"; };
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alarm 600;
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readline $self->{socket} or die "the VM quit before connecting\n";
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alarm 0;
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$self->log("connected to guest root shell");
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# We're interested in tracking how close we are to `alarm`.
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$self->log(sprintf("(connecting took %.2f seconds)", clock_gettime(CLOCK_MONOTONIC) - $now));
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$self->{connected} = 1;
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});
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}
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sub waitForShutdown {
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my ($self) = @_;
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return unless $self->{booted};
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$self->nest("waiting for the VM to power off", sub {
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waitpid $self->{pid}, 0;
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$self->{pid} = 0;
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$self->{booted} = 0;
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$self->{connected} = 0;
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});
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}
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sub isUp {
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my ($self) = @_;
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return $self->{booted} && $self->{connected};
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}
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sub execute_ {
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my ($self, $command) = @_;
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$self->connect;
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print { $self->{socket} } ("( $command ); echo '|!=EOF' \$?\n");
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my $out = "";
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while (1) {
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my $line = readline($self->{socket});
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die "connection to VM lost unexpectedly" unless defined $line;
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#$self->log("got line: $line");
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if ($line =~ /^(.*)\|\!\=EOF\s+(\d+)$/) {
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$out .= $1;
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$self->log("exit status $2");
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return ($2, $out);
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}
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$out .= $line;
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}
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}
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sub execute {
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my ($self, $command) = @_;
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my @res;
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$self->nest("running command: $command", sub {
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@res = $self->execute_($command);
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});
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return @res;
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}
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sub succeed {
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my ($self, @commands) = @_;
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my $res;
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foreach my $command (@commands) {
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$self->nest("must succeed: $command", sub {
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my ($status, $out) = $self->execute_($command);
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if ($status != 0) {
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$self->log("output: $out");
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die "command `$command' did not succeed (exit code $status)\n";
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}
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$res .= $out;
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});
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}
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return $res;
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}
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sub mustSucceed {
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succeed @_;
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}
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sub waitUntilSucceeds {
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my ($self, $command) = @_;
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$self->nest("waiting for success: $command", sub {
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retry sub {
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my ($status, $out) = $self->execute($command);
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return 1 if $status == 0;
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};
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});
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}
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sub waitUntilFails {
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my ($self, $command) = @_;
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$self->nest("waiting for failure: $command", sub {
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retry sub {
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my ($status, $out) = $self->execute($command);
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return 1 if $status != 0;
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};
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});
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}
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sub fail {
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my ($self, $command) = @_;
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$self->nest("must fail: $command", sub {
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my ($status, $out) = $self->execute_($command);
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die "command `$command' unexpectedly succeeded"
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if $status == 0;
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});
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}
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sub mustFail {
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fail @_;
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}
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sub getUnitInfo {
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my ($self, $unit, $user) = @_;
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my ($status, $lines) = $self->systemctl("--no-pager show \"$unit\"", $user);
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return undef if $status != 0;
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my $info = {};
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foreach my $line (split '\n', $lines) {
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$line =~ /^([^=]+)=(.*)$/ or next;
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$info->{$1} = $2;
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}
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return $info;
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}
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sub systemctl {
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my ($self, $q, $user) = @_;
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if ($user) {
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$q =~ s/'/\\'/g;
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return $self->execute("su -l $user -c \$'XDG_RUNTIME_DIR=/run/user/`id -u` systemctl --user $q'");
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}
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return $self->execute("systemctl $q");
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}
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# Fail if the given systemd unit is not in the "active" state.
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sub requireActiveUnit {
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my ($self, $unit) = @_;
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$self->nest("checking if unit ‘$unit’ has reached state 'active'", sub {
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my $info = $self->getUnitInfo($unit);
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my $state = $info->{ActiveState};
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if ($state ne "active") {
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die "Expected unit ‘$unit’ to to be in state 'active' but it is in state ‘$state’\n";
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};
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});
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}
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# Wait for a systemd unit to reach the "active" state.
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sub waitForUnit {
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my ($self, $unit, $user) = @_;
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$self->nest("waiting for unit ‘$unit’", sub {
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retry sub {
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my $info = $self->getUnitInfo($unit, $user);
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my $state = $info->{ActiveState};
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die "unit ‘$unit’ reached state ‘$state’\n" if $state eq "failed";
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if ($state eq "inactive") {
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# If there are no pending jobs, then assume this unit
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# will never reach active state.
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my ($status, $jobs) = $self->systemctl("list-jobs --full 2>&1", $user);
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if ($jobs =~ /No jobs/) { # FIXME: fragile
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# Handle the case where the unit may have started
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# between the previous getUnitInfo() and
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# list-jobs.
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my $info2 = $self->getUnitInfo($unit);
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die "unit ‘$unit’ is inactive and there are no pending jobs\n"
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if $info2->{ActiveState} eq $state;
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}
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}
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return 1 if $state eq "active";
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};
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});
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}
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sub waitForJob {
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my ($self, $jobName) = @_;
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return $self->waitForUnit($jobName);
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}
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# Wait until the specified file exists.
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sub waitForFile {
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my ($self, $fileName) = @_;
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$self->nest("waiting for file ‘$fileName’", sub {
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retry sub {
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my ($status, $out) = $self->execute("test -e $fileName");
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return 1 if $status == 0;
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}
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});
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}
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sub startJob {
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my ($self, $jobName, $user) = @_;
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$self->systemctl("start $jobName", $user);
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# FIXME: check result
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}
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sub stopJob {
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my ($self, $jobName, $user) = @_;
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$self->systemctl("stop $jobName", $user);
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}
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# Wait until the machine is listening on the given TCP port.
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sub waitForOpenPort {
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my ($self, $port) = @_;
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$self->nest("waiting for TCP port $port", sub {
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retry sub {
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my ($status, $out) = $self->execute("nc -z localhost $port");
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return 1 if $status == 0;
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}
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});
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}
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# Wait until the machine is not listening on the given TCP port.
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sub waitForClosedPort {
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my ($self, $port) = @_;
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retry sub {
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my ($status, $out) = $self->execute("nc -z localhost $port");
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return 1 if $status != 0;
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}
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}
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sub shutdown {
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my ($self) = @_;
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return unless $self->{booted};
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print { $self->{socket} } ("poweroff\n");
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$self->waitForShutdown;
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}
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sub crash {
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my ($self) = @_;
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return unless $self->{booted};
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$self->log("forced crash");
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$self->sendMonitorCommand("quit");
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$self->waitForShutdown;
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}
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# Make the machine unreachable by shutting down eth1 (the multicast
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# interface used to talk to the other VMs). We keep eth0 up so that
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# the test driver can continue to talk to the machine.
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sub block {
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my ($self) = @_;
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$self->sendMonitorCommand("set_link virtio-net-pci.1 off");
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}
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# Make the machine reachable.
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sub unblock {
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my ($self) = @_;
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$self->sendMonitorCommand("set_link virtio-net-pci.1 on");
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}
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# Take a screenshot of the X server on :0.0.
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sub screenshot {
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my ($self, $filename) = @_;
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my $dir = $ENV{'out'} || Cwd::abs_path(".");
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$filename = "$dir/${filename}.png" if $filename =~ /^\w+$/;
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my $tmp = "${filename}.ppm";
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my $name = basename($filename);
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$self->nest("making screenshot ‘$name’", sub {
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$self->sendMonitorCommand("screendump $tmp");
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system("pnmtopng $tmp > ${filename}") == 0
|
||
or die "cannot convert screenshot";
|
||
unlink $tmp;
|
||
}, { image => $name } );
|
||
}
|
||
|
||
# Get the text of TTY<n>
|
||
sub getTTYText {
|
||
my ($self, $tty) = @_;
|
||
|
||
my ($status, $out) = $self->execute("fold -w\$(stty -F /dev/tty${tty} size | awk '{print \$2}') /dev/vcs${tty}");
|
||
return $out;
|
||
}
|
||
|
||
# Wait until TTY<n>'s text matches a particular regular expression
|
||
sub waitUntilTTYMatches {
|
||
my ($self, $tty, $regexp) = @_;
|
||
|
||
$self->nest("waiting for $regexp to appear on tty $tty", sub {
|
||
retry sub {
|
||
my ($retries_remaining) = @_;
|
||
if ($retries_remaining == 0) {
|
||
$self->log("Last chance to match /$regexp/ on TTY$tty, which currently contains:");
|
||
$self->log($self->getTTYText($tty));
|
||
}
|
||
|
||
return 1 if $self->getTTYText($tty) =~ /$regexp/;
|
||
}
|
||
});
|
||
}
|
||
|
||
# Debugging: Dump the contents of the TTY<n>
|
||
sub dumpTTYContents {
|
||
my ($self, $tty) = @_;
|
||
|
||
$self->execute("fold -w 80 /dev/vcs${tty} | systemd-cat");
|
||
}
|
||
|
||
# Take a screenshot and return the result as text using optical character
|
||
# recognition.
|
||
sub getScreenText {
|
||
my ($self) = @_;
|
||
|
||
system("command -v tesseract &> /dev/null") == 0
|
||
or die "getScreenText used but enableOCR is false";
|
||
|
||
my $text;
|
||
$self->nest("performing optical character recognition", sub {
|
||
my $tmpbase = Cwd::abs_path(".")."/ocr";
|
||
my $tmpin = $tmpbase."in.ppm";
|
||
|
||
$self->sendMonitorCommand("screendump $tmpin");
|
||
|
||
my $magickArgs = "-filter Catrom -density 72 -resample 300 "
|
||
. "-contrast -normalize -despeckle -type grayscale "
|
||
. "-sharpen 1 -posterize 3 -negate -gamma 100 "
|
||
. "-blur 1x65535";
|
||
my $tessArgs = "-c debug_file=/dev/null --psm 11 --oem 2";
|
||
|
||
$text = `convert $magickArgs $tmpin tiff:- | tesseract - - $tessArgs`;
|
||
my $status = $? >> 8;
|
||
unlink $tmpin;
|
||
|
||
die "OCR failed with exit code $status" if $status != 0;
|
||
});
|
||
return $text;
|
||
}
|
||
|
||
|
||
# Wait until a specific regexp matches the textual contents of the screen.
|
||
sub waitForText {
|
||
my ($self, $regexp) = @_;
|
||
$self->nest("waiting for $regexp to appear on the screen", sub {
|
||
retry sub {
|
||
my ($retries_remaining) = @_;
|
||
if ($retries_remaining == 0) {
|
||
$self->log("Last chance to match /$regexp/ on the screen, which currently contains:");
|
||
$self->log($self->getScreenText);
|
||
}
|
||
|
||
return 1 if $self->getScreenText =~ /$regexp/;
|
||
}
|
||
});
|
||
}
|
||
|
||
|
||
# Wait until it is possible to connect to the X server. Note that
|
||
# testing the existence of /tmp/.X11-unix/X0 is insufficient.
|
||
sub waitForX {
|
||
my ($self, $regexp) = @_;
|
||
$self->nest("waiting for the X11 server", sub {
|
||
retry sub {
|
||
my ($status, $out) = $self->execute("journalctl -b SYSLOG_IDENTIFIER=systemd | grep 'Reached target Current graphical'");
|
||
return 0 if $status != 0;
|
||
($status, $out) = $self->execute("[ -e /tmp/.X11-unix/X0 ]");
|
||
return 1 if $status == 0;
|
||
}
|
||
});
|
||
}
|
||
|
||
|
||
sub getWindowNames {
|
||
my ($self) = @_;
|
||
my $res = $self->mustSucceed(
|
||
q{xwininfo -root -tree | sed 's/.*0x[0-9a-f]* \"\([^\"]*\)\".*/\1/; t; d'});
|
||
return split /\n/, $res;
|
||
}
|
||
|
||
|
||
sub waitForWindow {
|
||
my ($self, $regexp) = @_;
|
||
$self->nest("waiting for a window to appear", sub {
|
||
retry sub {
|
||
my @names = $self->getWindowNames;
|
||
|
||
my ($retries_remaining) = @_;
|
||
if ($retries_remaining == 0) {
|
||
$self->log("Last chance to match /$regexp/ on the the window list, which currently contains:");
|
||
$self->log(join(", ", @names));
|
||
}
|
||
|
||
foreach my $n (@names) {
|
||
return 1 if $n =~ /$regexp/;
|
||
}
|
||
}
|
||
});
|
||
}
|
||
|
||
|
||
sub copyFileFromHost {
|
||
my ($self, $from, $to) = @_;
|
||
my $s = `cat $from` or die;
|
||
$s =~ s/'/'\\''/g;
|
||
$self->mustSucceed("echo '$s' > $to");
|
||
}
|
||
|
||
|
||
my %charToKey = (
|
||
'A' => "shift-a", 'N' => "shift-n", '-' => "0x0C", '_' => "shift-0x0C", '!' => "shift-0x02",
|
||
'B' => "shift-b", 'O' => "shift-o", '=' => "0x0D", '+' => "shift-0x0D", '@' => "shift-0x03",
|
||
'C' => "shift-c", 'P' => "shift-p", '[' => "0x1A", '{' => "shift-0x1A", '#' => "shift-0x04",
|
||
'D' => "shift-d", 'Q' => "shift-q", ']' => "0x1B", '}' => "shift-0x1B", '$' => "shift-0x05",
|
||
'E' => "shift-e", 'R' => "shift-r", ';' => "0x27", ':' => "shift-0x27", '%' => "shift-0x06",
|
||
'F' => "shift-f", 'S' => "shift-s", '\'' => "0x28", '"' => "shift-0x28", '^' => "shift-0x07",
|
||
'G' => "shift-g", 'T' => "shift-t", '`' => "0x29", '~' => "shift-0x29", '&' => "shift-0x08",
|
||
'H' => "shift-h", 'U' => "shift-u", '\\' => "0x2B", '|' => "shift-0x2B", '*' => "shift-0x09",
|
||
'I' => "shift-i", 'V' => "shift-v", ',' => "0x33", '<' => "shift-0x33", '(' => "shift-0x0A",
|
||
'J' => "shift-j", 'W' => "shift-w", '.' => "0x34", '>' => "shift-0x34", ')' => "shift-0x0B",
|
||
'K' => "shift-k", 'X' => "shift-x", '/' => "0x35", '?' => "shift-0x35",
|
||
'L' => "shift-l", 'Y' => "shift-y", ' ' => "spc",
|
||
'M' => "shift-m", 'Z' => "shift-z", "\n" => "ret",
|
||
);
|
||
|
||
|
||
sub sendKeys {
|
||
my ($self, @keys) = @_;
|
||
foreach my $key (@keys) {
|
||
$key = $charToKey{$key} if exists $charToKey{$key};
|
||
$self->sendMonitorCommand("sendkey $key");
|
||
}
|
||
}
|
||
|
||
|
||
sub sendChars {
|
||
my ($self, $chars) = @_;
|
||
$self->nest("sending keys ‘$chars’", sub {
|
||
$self->sendKeys(split //, $chars);
|
||
});
|
||
}
|
||
|
||
|
||
# Sleep N seconds (in virtual guest time, not real time).
|
||
sub sleep {
|
||
my ($self, $time) = @_;
|
||
$self->succeed("sleep $time");
|
||
}
|
||
|
||
|
||
# Forward a TCP port on the host to a TCP port on the guest. Useful
|
||
# during interactive testing.
|
||
sub forwardPort {
|
||
my ($self, $hostPort, $guestPort) = @_;
|
||
$hostPort = 8080 unless defined $hostPort;
|
||
$guestPort = 80 unless defined $guestPort;
|
||
$self->sendMonitorCommand("hostfwd_add tcp::$hostPort-:$guestPort");
|
||
}
|
||
|
||
|
||
1;
|