Re^2: A little demo for Net::SSH2

I am using what I can glean from this thread to try to ssh into a cisco box and get a portion of it's config. What I am using below executes the two commands, sleeps 45 seconds, and by the time it gets past the sleep loop it has already closed the shell. Is there any way to make the shell stay open until I close it, if that makes sense? Like a keepalive of some kind?

if ($ssh)
    {  
      eval { 
        my $cs = Net::SSH2->new();
        $cs->connect($_);
        my $ip = $_;
        my $done = false;
        open (OUTFILE, ">$ip.txt");
        if ($cs->auth_keyboard($user,$pw))   # login
        {
          print "Opening SSH session to $_\n"; 
          my $chan2 = $cs->channel();         
          $chan2->shell();
          print $chan2 "term len 0\n";
          print $chan2 "sh run | be line\n";
#          until (<$chan2> =~ /line con 0/i) {
#          print "in the line con 0 loop";
          print <$chan2>; 
#          }; # prints everything above the "line con 0" line
#          print OUTFILE "line con 0\n";                         # pri
+nts the "line con 0" line
#          until ($done) {
#            print "do we even enter the until loop?\n\n";
#            if (<$chan2> =~ /new/i) {
#              print "we are done!!!\n\n\n";
#              $done = true; 
#            }
#            print "the similarity of chan2 and end is " . (<$chan2> =
+~ /new/i) . "\n";
#           print <$chan2> . "here is another line " . $done;         
+    
#          }          # prints everything below the "line con 0" line
           my $count = 45;
          while ($count > 0) {
            print --$count;
            sleep 1;
          }
          until (<$chan2> =~ /line con 0/i) {1; }; 
          print $chan2 "exit\n";
          print "chan2 is empty, and we are awake\n";
          close (OUTFILE);
          $chan2->close;                 # Log out of device
          print LOG "SSH to " .  $ip . "\n";
        }
      };  # End trying ssh
[download]

so, I fixed it, with

    if ($ssh)
    {  
      eval { 
        my $cs = Net::SSH2->new();
        $cs->connect($_);
        my $ip = $_;
        open (OUTFILE, ">$ip.txt");
        if ($cs->auth_keyboard($user,$pw))   # login
        {
          print "Opening SSH session to $_\n"; 
          my $chan2 = $cs->channel();         
          $chan2->shell();
          print $chan2 "term len 0\n";
          print $chan2 "sh run | be line\n";
          print OUTFILE <$chan2>; 
          print OUTFILE "line con 0\n";                               
+  # prints the "line con 0" line
          print OUTFILE <$chan2>;                                     
+  # prints everything below the "line con 0" line
           until (<$chan2> =~ /line con 0/i) {1;};
          print OUTFILE <$chan2>;                                     
+  # prints everything below the "line con 0" line
           close (OUTFILE);
          $chan2->close;                 # Log out of device
          print LOG "SSH to " .  $ip . "\n";
        }
      };  # End trying ssh
[download]

It must have been the blocking missing, and the untils were messing it up.

Comment on Re^2: A little demo for Net::SSH2 Select or Download Code

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Re^3: A little demo for Net::SSH2 by zentara (Archbishop) on Oct 15, 2010 at 20:03 UTC
It must have been the blocking missing, I didn't see you have a $chan->blocking(0/1), or if that is the type of blocking you are talking about. If you google for "Net::SSH2 timeout" you will find it has been tricky to get timeouts to work. The latest module has a few lines where timeouts can be set `connect ( handle \| host [, port [, Timeout => secs ]] )` [download] and `poll ( timeout, arrayref of hashes ) #probably the timeout you want` [download] You might want to look at Net::SSH2 Command Timeout Before Completion for other modules that handle the timeouts better. I'm not really a human, but I play one on earth. Old Perl Programmer Haiku ................... flash japh	[reply] [d/l] [select]
Re^4: A little demo for Net::SSH2 by Anonymous Monk on Oct 29, 2010 at 18:14 UTC
Hi, I want to run program in background in remote host. I tried this but does not work. `#!/usr/bin/perl -w use strict; use warnings; use Net::SSH2; my $ssh2 = Net::SSH2->new(); $ssh2->connect("myhost.com") or die ("SSH2 Connect Error: $!"); $ssh2->auth_password($user, $pass) or die; my $chan1 = $ssh2->channel(); $chan1->blocking(0); $chan1->exec("./a.out &"); $chan1->close; $ssh2->disconnect();` [download] Any idea will be appreciated. Thanks.	[reply] [d/l]
Re^5: A little demo for Net::SSH2 by zentara (Archbishop) on Oct 30, 2010 at 10:33 UTC
I havn't tested this, but try running the command with nohup, see "man nohup". `$chan1->exec("nohup ./a.out ");` [download] I'm not really a human, but I play one on earth. Old Perl Programmer Haiku ................... flash japh	[reply] [d/l]
Re^5: A little demo for Net::SSH2 by afoken (Chancellor) on Oct 30, 2010 at 11:37 UTC
Explain "does not work". What do you expect, what happens instead? Any messages? Add error checks to your code. Alexander -- Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)	[reply]
Re^6: A little demo for Net::SSH2 by Anonymous Monk on Nov 01, 2010 at 14:35 UTC
Re^7: A little demo for Net::SSH2 by zentara (Archbishop) on Nov 15, 2010 at 18:20 UTC


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