Hello Monks,

I wrote a code that uses Net::SSH::Expect to access a device and then run commands. all is working well until it gets to a device that its key was changed. the script below is a part of the main script i just reduced it to the problematic part. I'm using "eval" around the $ssh-> login and i'm checking the @$ if there are errors the sub returns ERROR else it returns the $ssh. however @$ does not hold the FIX: .ssh/known_hosts as you can see the message comes just after i run $ssh->login.

I have made a work around for it as you can see it the second script "run_system_cmd.pl" below, that uses a "system call" to run the first script and capture its output the @array that hold the hosts message init.

BUT i don't want to use the workaround i want that the first script would be able to capture the FIX message so it can deal with it himself.

How can I capture the FIX: .ssh/known_hosts message from within the first script.

thank you Avi

first script code and output: 
#!/usr/bin/perl

# tst_ssh_host_key.pl

use strict;
use warnings;
use threads;
use CGI qw/:standard/;
use Net::SSH::Expect;
use Getopt::Std;
my $nl = "\n";
my $debug ="";
my $ssh = open_ssh('172.23.5.13','user','password');
print "ssh=$ssh",$nl;
print "DONE",$nl;
exit;

sub open_ssh {
my $nl="\n";
my $debug =1;
my $command_prompt = '>';
my $login_output ="";
my $username;
my $password;
my $host_ip;
my $ssh;
my $Permission_denied = 'Permission denied';
($host_ip,$username,$password) = @_;
unless ($host_ip) {return ("FAILED-NO_HOST_IP,end_login");} if ($debug
+) {print "open_ssh,$host_ip,$username,$password",$nl;}
$ssh = Net::SSH::Expect-> new (
host => $host_ip,
user => $username,
password => $password,
timeout => 10,
raw_pty => 1,
debug => 1
);
print "Before ssh->login",$nl;
eval {
$login_output = $ssh ->login();
};
print "After ssh->login",$nl;
if ($debug) {print "login_output=",$login_output,$nl;print "global=",$
+@, $nl;} if (($@) || ($login_output !~ /$command_prompt/)) {

if (($@ =~ 'Error') || ($@ =~ 'Aborted') || ($@ =~
$Permission_denied) || ($login_output =~ $Permission_denied) || ($logi
+n_output !~ /$command_prompt/)) {
unless ($login_output) {$login_output = 'no_login_output';}
return ("FAILED,".$login_output.",end_login");
}
}
return $ssh;
}

--------------------------

Run Output :

./tst_ssh_host_key.pl
open_ssh,172.23.5.13,user,password
Before ssh->login
FIX: .ssh/known_hosts
After ssh->login
login_output=
global=SSHProcessError The ssh process was terminated.
at ./tst_ssh_host_key.pl line 42

ssh=FAILED,no_login_output,end_login
DONE

[download]
----------
Second workaround script 
#!/usr/bin/perl -w

#run_system_cmd.pl

use strict;
use Data::Dumper;

my $debug =1;
undef my @array;
@array = `./tst_ssh_host_key.pl`;

print Dumper @array;
print "\n";


----

workaround Run Output:

./run_system_cmd.pl
$VAR1 = 'open_ssh,172.23.5.13,user,password
';
$VAR2 = 'Before ssh->login
';
$VAR3 = 'FIX: .ssh/known_hosts
';
$VAR4 = 'After ssh->login
';
$VAR5 = 'login_output=
';
$VAR6 = 'global=SSHProcessError The ssh process was terminated.
at ./tst_ssh_host_key.pl line 42
';
$VAR7 = '
';
$VAR8 = 'ssh=FAILED,no_login_output,end_login
';
$VAR9 = 'DONE
';

[download]

In reply to Capture FIX: .ssh/known_hosts message when using Net::SSH::Expect by avim1968

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