0086036141
Current message may not be printed (nothing in systemd contains that string, it comes from elsewhere)
711 lines
19 KiB
Perl
711 lines
19 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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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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$startCommand =
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"qemu-kvm -m 384 " .
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"-net nic,model=virtio \$QEMU_OPTS ";
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my $iface = $args->{hdaInterface} || "virtio";
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$startCommand .= "-drive file=" . Cwd::abs_path($args->{hda}) . ",if=$iface,werror=report "
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if defined $args->{hda};
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$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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local $SIG{ALRM} = sub { die "timed out waiting for the VM to connect\n"; };
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alarm 300;
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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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$self->{connected} = 1;
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});
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}
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sub waitForShutdown {
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my ($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
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or die "cannot convert screenshot";
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unlink $tmp;
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}, { image => $name } );
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}
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# Get the text of TTY<n>
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sub getTTYText {
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my ($self, $tty) = @_;
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my ($status, $out) = $self->execute("fold -w\$(stty -F /dev/tty${tty} size | awk '{print \$2}') /dev/vcs${tty}");
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return $out;
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}
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# Wait until TTY<n>'s text matches a particular regular expression
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sub waitUntilTTYMatches {
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my ($self, $tty, $regexp) = @_;
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$self->nest("waiting for $regexp to appear on tty $tty", sub {
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retry sub {
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my ($retries_remaining) = @_;
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if ($retries_remaining == 0) {
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$self->log("Last chance to match /$regexp/ on TTY$tty, which currently contains:");
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$self->log($self->getTTYText($tty));
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}
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return 1 if $self->getTTYText($tty) =~ /$regexp/;
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}
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});
|
||
}
|
||
|
||
# Debugging: Dump the contents of the TTY<n>
|
||
sub dumpTTYContents {
|
||
my ($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;
|