Re: Net::SSH::Perl returns error on pty allocation

No pty allocated, pty required..

Use use_pty => 1 in the constructor; also, the customer server expects SSH2, so use protocol => 2 in the constructor also. Here's the way that I would do it:

#!/usr/bin/perl

use strict;
use warnings;
use Net::SSH::Perl;

my $user = 'user';
my $pass = 'password';
my $cmd  = "ls /root";

my $ssh = Net::SSH::Perl->new('localhost',
    debug    => 1,
    protocol => 2,
    use_pty  => 1,
);
    
$ssh->login($user, $pass) ;

if ($cmd) {
    my($stdout, $stderr, $exit) = $ssh->cmd($cmd);
    print $stdout if $stdout;
    print $stderr if $stderr;
}
else {
    eval "use Term::ReadKey;";
    ReadMode('raw');
    eval "END { ReadMode('restore') };";
    $ssh->shell;
    print "Connection to host closed.\n";
}

__END__
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Re^2: Net::SSH::Perl returns error on pty allocation by gdanenb (Acolyte) on Mar 03, 2013 at 13:37 UTC
Is there an option to send commands and collect output when using $ssh->shell interactive mode? I think this is the only way I'll success since customer node is not a standard Linux box Anyway, this is the output when I run the code above: sem1: Reading configuration data /root/.ssh/config sem1: Reading configuration data /etc/ssh_config sem1: Allocated local port 1023. sem1: Connecting to 1.1.1.1, port 22. sem1: Remote protocol version 2.0, remote software version OpenSSH_4.3 +-40020723001500 sem1: Net::SSH::Perl Version 1.33, protocol version 2.0. sem1: No compat match: OpenSSH_4.3-40020723001500. sem1: Connection established. sem1: Sent key-exchange init (KEXINIT), wait response. sem1: Algorithms, c->s: 3des-cbc hmac-sha1 none sem1: Algorithms, s->c: 3des-cbc hmac-sha1 none sem1: Entering Diffie-Hellman Group 1 key exchange. sem1: Sent DH public key, waiting for reply. sem1: Received host key, type 'ssh-dss'. sem1: Host '1.1.1.1' is known and matches the host key. sem1: Computing shared secret key. sem1: Verifying server signature. sem1: Waiting for NEWKEYS message. sem1: Enabling incoming encryption/MAC/compression. sem1: Send NEWKEYS, enable outgoing encryption/MAC/compression. sem1: Sending request for user-authentication service. sem1: Service accepted: ssh-userauth. sem1: Trying empty user-authentication request. sem1: Authentication methods that can continue: password. sem1: Next method to try is password. sem1: Trying password authentication. sem1: Login completed, opening dummy shell channel. sem1: channel 0: new [client-session] sem1: Requesting channel_open for channel 0. sem1: channel 0: open confirm rwindow 0 rmax 32768 sem1: Got channel open confirmation, requesting shell. sem1: Requesting service shell on channel 0. sem1: channel 1: new [client-session] sem1: Requesting channel_open for channel 1. sem1: Entering interactive session. Received disconnect message: No pty allocated, pty required with Telne +t SSH at /usr/cti/apps/CSPbase/Perl/lib/perl5/site_perl/5.8.8/Net/SSH/Perl/S +SH2.pm line 300 [download]	[reply] [d/l]
Re^3: Net::SSH::Perl returns error on pty allocation by Khen1950fx (Canon) on Mar 03, 2013 at 16:41 UTC
Try adding `set_interactive` to the constructor.	[reply] [d/l]
Re^4: Net::SSH::Perl returns error on pty allocation by gdanenb (Acolyte) on Mar 05, 2013 at 12:19 UTC
I tried most of options provided by Net::SSH::Perl module but failed to get good results On the other hand Net::SSH::Expect module worked perfect for me Thank you all	[reply]