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# Copyright 2009-2013 Bernhard M. Wiedemann |
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# Copyright 2012-2021 SUSE LLC |
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# SPDX-License-Identifier: GPL-2.0-or-later |
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# this class is what presents $backend in isotovideo and its code runs |
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# in the main process. But its main task is to start a 2nd process and talk to it over |
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# a PIPE |
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# in that 2nd process runs the actual backend, derived from backend::baseclass |
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use Mojo::Base -base, -signatures; |
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use autodie ':all'; |
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use Carp 'croak'; |
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use Mojo::JSON 'to_json'; |
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use File::Path 'remove_tree'; |
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use POSIX '_exit'; |
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require IPC::System::Simple; |
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use Mojo::IOLoop::ReadWriteProcess 'process'; |
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use Mojo::IOLoop::ReadWriteProcess::Session 'session'; |
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use myjsonrpc; |
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use signalblocker; |
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use log qw(diag fctinfo); |
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my $self = $class->SUPER::new({class => $class}); |
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require "backend/$name.pm"; |
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$self->{backend} = "backend::$name"->new(); |
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$self->{backend_name} = $name; |
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session->on( |
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collected_orphan => sub { |
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my ($session, $p) = @_; |
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fctinfo("Driver backend collected unknown process with pid " . $p->pid . " and exit status: " . $p->exit_status); |
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}); |
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$self->start(); |
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return $self; |
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} |
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open(my $STDOUTPARENT, '>&', *STDOUT); |
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open(my $STDERRPARENT, '>&', *STDERR); |
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my $backend_process = process( |
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sleeptime_during_kill => .1, |
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total_sleeptime_during_kill => 30, |
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max_kill_attempts => 1, |
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kill_sleeptime => 0, |
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blocking_stop => 1, |
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separate_err => 0, |
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subreaper => 1, |
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code => sub { |
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my $process = shift; |
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$0 = "$0: backend"; |
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open STDOUT, ">&", $STDOUTPARENT; |
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open STDERR, ">&", $STDERRPARENT; |
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# initialize OpenCV |
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my $signal_blocker = signalblocker->new; |
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require cv; |
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cv::init(); |
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require tinycv; |
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tinycv::create_threads(); |
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undef $signal_blocker; |
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$self->{backend}->run(fileno($process->channel_in), fileno($process->channel_out)); |
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}); |
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$backend_process->on(collected => sub { diag("backend process exited: " . shift->exit_status) }); |
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$backend_process->start; |
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diag("$$: channel_out " . fileno($backend_process->channel_out) . ', channel_in ' . fileno($backend_process->channel_in)); |
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$self->{backend_pid} = $backend_process->pid; |
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$self->{backend_process} = $backend_process; |
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} |
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return unless $self->{backend_process}->is_running; |
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$self->stop_backend() if $self->{backend_process}->channel_out; |
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close($self->{backend_process}->channel_out) if $self->{backend_process}->channel_out; |
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close($self->{backend_process}->channel_in) if $self->{backend_process}->channel_in; |
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$self->{backend_process}->channel_in(undef); |
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$self->{backend_process}->channel_out(undef); |
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$self->{backend_process}->stop; |
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} |
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# new api |
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my $json = to_json({backend => $self->{backend_name}}); |
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open(my $runf, ">", 'backend.run'); |
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print $runf "$json\n"; |
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close $runf; |
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# remove old screenshots |
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remove_tree($bmwqemu::screenshotpath); |
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mkdir $bmwqemu::screenshotpath; |
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$self->_send_json({cmd => 'start_vm'}) || die "failed to start VM"; |
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return 1; |
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} |
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$self->_send_json({cmd => 'stop_vm'}); |
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# remove if still existent |
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unlink('backend.run') if -e 'backend.run'; |
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return; |
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} |
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# new api end |
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# virtual methods end |
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croak "no backend running" unless $self->{backend_process}->channel_in; |
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my $token = myjsonrpc::send_json($self->{backend_process}->channel_in, $cmd); |
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my $rsp = myjsonrpc::read_json($self->{backend_process}->channel_out, $token); |
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return $rsp->{rsp} if defined $rsp; |
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# this might have been closed by signal handler |
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no autodie 'close'; |
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close($self->{backend_process}->channel_out); |
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$self->{backend_process}->channel_out(undef); |
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$self->{backend_process}->stop; |
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return; |
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} |
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1; |