[Expectperl-discuss] Getting 'could connect pty as controlling error" for perl expect

[Sreekanta S. P. N. (Poornima) <poo...@al...>]

Hi,

  I am relatively new to Perl and Perl-expect. I am trying to debug an existing Perl code with expect usage in it.

 We are always the following error message “Error: could not connect pty as controlling terminal! “

 I believe its due to expect not getting control of terminal, but otherwise the code runs ok.

 How do I suppress this message or avoid it altogether? Any help is very much appreciated.

This is the code snippet:- 

if ($command eq "ssh") {
                foreach my $IP (@ipAdd) {
                  print "executing Ssh on ip =$IP\n";
                  my $exp = new Expect;
                  $exp->raw_pty(1); #should be before spawning to disable echoing
                  $exp->manual_stty(1); #should be before spawning to disable echoing
                 my $ret = $exp->spawn("ssh $IP -t vxShell"); -------→ is this the culprit ?
                  my $err_ = $exp->exp_error();
                    if(!defined($ret)) {
                          print "Send Spawn to $ip is failed\n";
                    push @junk_exps,$exp;
                          next;
                  }
            $exp->expect(65,
                          [timeout => \&setTimeout],
                          [qr/>:/ =>  \&doNothing],
                          [eof => \&setEOF]
                        );
                  if(&isErr()){
                    print "expecting prompt on spawn to $IP Failed\n";
                    push @junk_exps,$exp;
                    next;
                  }

Now the code runs on solaris. 

The expect is supposed to spawn ssh on Vxworks system .

Now the code runs fine but it always throws this message

executing Ssh on ip = 1.2.3.4
Error: could not connect pty as controlling terminal! <<<< ------- Why is this coming ?
expecting prompt on spawn to   1.2.3.4 Failed

or alternaltively

executing Ssh on ip = 1.2.3.4
Error: could not connect pty as controlling terminal!  <<<←---------- why is this message coming expecting prompt on spawn to   1.2.3.4 success


Thanks
Poornima