using NET::TELNET waiting for login prompt

Altiokis has asked for the wisdom of the Perl Monks concerning the following question:

I'm working on the beginings of a portion of some perl code that is to telnet into a node using telnet. This snippet of code works fine telnetting into a linux box, but doesn't work logging into my node. Here is what my code looks like.

use strict;
use Net::Telnet ();
my $t = new Net::Telnet Timeout => 30,
Prompt => '/[\$#%:><] $/';
$t->open($ARGV[0]);
$t->login($ARGV[1], $ARGV[2]);
my @lines = $t->cmd("MY CMD/;");
print @lines;
[download]

and this is what the login looks like. I'm thinking it's all the white space between the Escape character message and the actual login prompt, but i don't know how to account for that.

Trying 1.1.1.1...
Connected to 1.1.1.1.
Escape character is '^]'.


























ENTER USERNAME < 
ENTER PASSWORD <
[download]

Comment on using NET::TELNET waiting for login prompt Select or Download Code

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Re: using NET::TELNET waiting for login prompt by Illuminatus (Curate) on Aug 15, 2012 at 23:34 UTC
Did you look at the documentation for Net::Telnet? It gives you several things to try (like using dump_log() or input_log()). If you did use those, what did they tell you? Are you sure that there's just a single space after the < in the prompt? Your regexp will only match a single space and the EOL. If there are no spaces or more than one, it won't match fnord	[reply]
Re^2: using NET::TELNET waiting for login prompt by Altiokis (Initiate) on Aug 15, 2012 at 23:49 UTC
Here's what the input.log shows `ENTER USERNAME < ^H` [download]	[reply] [d/l]
Re^3: using NET::TELNET waiting for login prompt by Illuminatus (Curate) on Aug 16, 2012 at 00:47 UTC
Assuming the ^H at the end is part of the data received by your program, then that's what's causing the failure. You could try `... Prompt => '/[\$#%:><][\s\b]+$/ ...` [download] If that doesn't work, the output from dump_log() might also be helpful. fnord	[reply] [d/l]