+sub start_program
+{
+ my ($conn, $line, $sort) = @_;
+ my $pid;
+
+ local $^F = 10000; # make sure it ain't closed on exec
+ my ($a, $b) = $io_socket->socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC);
+ if ($a && $b) {
+ $a->autoflush(1);
+ $b->autoflush(1);
+ $pid = fork;
+ if (defined $pid) {
+ if ($pid) {
+ close $b;
+ $conn->{sock} = $a;
+ $conn->{csort} = $sort;
+ $conn->{lineend} = "\cM" if $sort eq 'ax25';
+ $conn->{pid} = $pid;
+ if ($conn->{rproc}) {
+ my $callback = sub {$conn->_rcv};
+ Msg::set_event_handler ($a, read => $callback);
+ }
+ dbg("connect $conn->{cnum}: started pid: $conn->{pid} as $line") if isdbg('connect');
+ } else {
+ $^W = 0;
+ dbgclose();
+ STDIN->close;
+ STDOUT->close;
+ STDOUT->close;
+ *STDIN = IO::File->new_from_fd($b, 'r') or die;
+ *STDOUT = IO::File->new_from_fd($b, 'w') or die;
+ *STDERR = IO::File->new_from_fd($b, 'w') or die;
+ close $a;
+ unless ($main::is_win) {
+ # $SIG{HUP} = 'IGNORE';
+ $SIG{HUP} = $SIG{CHLD} = $SIG{TERM} = $SIG{INT} = 'DEFAULT';
+ alarm(0);
+ }
+ exec "$line" or dbg("exec '$line' failed $!");
+ }
+ } else {
+ dbg("cannot fork for $line");
+ }
+ } else {
+ dbg("no socket pair $! for $line");
+ }
+ return $pid;
+}
+
+sub disconnect
+{