I am trying to use the Net::SSH::Perl module ( that one being the pure perl module, as opposed to Net::SSH which is a wrapper around system() calls ) and running an 'su' on a remote box. It isn't working.

Specifically, I cannot seem to get the Net::SSH::Perl->cmd method to respond to the password: prompt. It appears the remote 'su' is timing out while waiting for input.

Has anybody else done this? If so, how? I have looked at installing my own handler, but thought to see how somebody else has done this before I hurt myself figuring it out.

Any help I could get from my fellow monks would be most appreciated.

For what it is worth, my code looks like: 

#!/usr/local/bin/perl -w
use strict;

use Net::SSH::Perl;
use Data::Dumper;

# I set the use_pty because that was the only way I could
# get this to work using /usr/local/bin/ssh.  It is really
# only a guess.
my $ssh = Net::SSH::Perl->new( "172.20.28.48", debug => 1, protocol =>
+ 2, use_pty => 1 );

$ssh->login();

my ($out, $err, $exit ) = $ssh->cmd('su - root -c "touch /var/tmp/sill
+y3"', '*******');
print "out = $out\nerr = $err\nexit = $exit\n";

[download]
and the (slightly truncated) debug output looks like this: 
borris: Login completed, opening dummy shell channel.
borris: channel 0: new [client-session]
borris: Requesting channel_open for channel 0.
borris: channel 0: open confirm rwindow 0 rmax 32768
borris: Got channel open confirmation, requesting shell.
borris: Requesting service shell on channel 0.
borris: channel 1: new [client-session]
borris: Requesting channel_open for channel 1.
borris: Entering interactive session.
borris: Sending command: su - root -c "touch /var/tmp/silly3"
borris: Requesting service exec on channel 1.
borris: channel 1: send eof
borris: channel 1: open confirm rwindow 131065 rmax 32768
borris: input_channel_request: rtype exit-status reply 0
borris: channel 1: rcvd eof
borris: channel 1: output open -> drain
borris: channel 1: rcvd close
borris: channel 1: obuf empty
borris: channel 1: output drain -> closed
borris: channel 1: close_write
borris: channel 1: send close
borris: channel 1: full closed
Use of uninitialized value in concatenation (.) or string at su.pl lin
+e 12.
out = 
err = su: Sorry

exit = 1

[download]

mik
mikfire

In reply to Net::SSH::Perl and su by mikfire

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