Perl output always zero

[Lt_Flash]

Good day. I have following script:

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#!/usr/bin/perl
$output = `ssh mail "find /var/CommuniGate/Queue -type f -name *.msg | wc -l"`;
printf ("emails:%u",$output);

This script was working for a long time, but now I've transferred Cacti on another server, and when I run this script from command line - it shows email count correctly, but when Cacti's poller runs it - it's always:

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07/16/2009 01:35:02 PM - CMDPHP: Poller[0] Host[28] DS[497] CMD: /opt/scripts/get-emails.pl, output: emails:0

I already tried to to %d, to do "$output=$output+0" - nothing seems to help...

[Lt_Flash]

So? Nobody has no ideas??? ((

[gandalf]

ssh requires credentials being set up correctly. It does not simply work by copying the scripts
Reinhard

[Lt_Flash]

Of course ssh credentials are set up correctly. If I run script from shell - it'll return correct number, but it seems that cacti just doesn't understand format and always shows zero. No errors are in log, just zero in output.

[gandalf]

The next common issue is to use /full/path/to/commands, don't rely on $PATH
Reinhard

[Lt_Flash]

Changed script to

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$output = `/usr/bin/ssh mail "/bin/find /var/CommuniGate/Queue -type f -name *.msg | /usr/bin/wc -l"`;
printf ("emails:%u",$output);

In Cacti's call there is full path to script. And Cacti sees return, it shows

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"DS[497] CMD: /opt/scripts/get-emails.pl, output: emails:0"

, here "emails: 0" is output from script. But it always read 0 for amount of emails.

[Lt_Flash]

Changed script to following:

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#!/usr/bin/perl

open (PROCESS,"/usr/bin/ssh mail \"/bin/find /var/CommuniGate/Queue -type f -name *.msg | /usr/bin/wc -l\" | ");
$output = <PROCESS>;
close (PROCESS);
chomp($output);
print "emails:$output";

Now I have following in logs:

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 CMD: /opt/scripts/get-emails.pl, output: emails:

So there's nothing at all now...