package Object::Remote::Role::Connector::PerlInterpreter;
-#use IPC::Open2;
+use IPC::Open2;
use IPC::Open3;
use IO::Handle;
use Object::Remote::ModuleSender;
with 'Object::Remote::Role::Connector';
has module_sender => (is => 'lazy');
+#if no child_stderr file handle is specified then stderr
+#of the child will be connected to stderr of the parent
+has stderr => ( is => 'rw', default => sub { \*STDERR } );
sub _build_module_sender {
my ($hook) =
#ulimit of ~500 megs of v-ram
#TODO only works with ssh with quotes but only works locally
#with out quotes
+#sub _build_perl_command { [ 'sh', '-c', '"ulimit -v 80000; nice -n 15 perl -"' ] }
sub _build_perl_command { [ 'sh', '-c', '"ulimit -v 500000; nice -n 15 perl -"' ] }
#sub _build_perl_command { [ 'perl', '-' ] }
sub _start_perl {
my $self = shift;
+ my $given_stderr = $self->stderr;
+ my $foreign_stderr;
+
Dlog_debug { "invoking connection to perl interpreter using command line: $_" } @{$self->final_perl_command};
+ use Symbol;
+
+ if (defined($given_stderr)) {
+ $foreign_stderr = gensym();
+ } else {
+ $foreign_stderr = ">&STDERR";
+ }
+
+ my $pid = open3(
+ my $foreign_stdin,
+ my $foreign_stdout,
+ $foreign_stderr,
+ @{$self->final_perl_command},
+ ) or die "Failed to run perl at '$_[0]': $!";
+
+ if (defined($given_stderr)) {
+ log_warn { "using experimental cat for child stderr" };
+
+ #TODO refactor if this solves the problem
+ Object::Remote->current_loop
+ ->watch_io(
+ handle => $foreign_stderr,
+ on_read_ready => sub {
+ my $buf = '';
+ my $len = sysread($foreign_stderr, $buf, 32768);
+ if (!defined($len) or $len == 0) {
+ log_trace { "Got EOF or error on child stderr, removing from watcher" };
+ $self->stderr(undef);
+ Object::Remote->current_loop
+ ->unwatch_io(
+ handle => $foreign_stderr,
+ on_read_ready => 1
+ );
+ } else {
+ Dlog_trace { "got $len characters of stderr data for connection" };
+ print $given_stderr $buf or die "could not send stderr data: $!";
+ }
+ }
+ );
+ }
+
#TODO open2() dupes the child stderr into the calling
#process stderr which means if this process exits the
#child is still attached to the shell - using open3()
#where the user of a connection species a destination for output
#either a file name or their own file handle and the node output
#is dumped to it
- my $pid = open2(
- my $foreign_stdout,
- my $foreign_stdin,
- @{$self->final_perl_command},
- ) or die "Failed to run perl at '$_[0]': $!";
+# my $pid = open2(
+# my $foreign_stdout,
+# my $foreign_stdin,
+# @{$self->final_perl_command},
+# ) or die "Failed to run perl at '$_[0]': $!";
Dlog_trace { "Connection to remote side successful; remote stdin and stdout: $_" } [ $foreign_stdin, $foreign_stdout ];
return ($foreign_stdin, $foreign_stdout, $pid);