Question

Can't call method "login" on an undefined value at ftp.pl line 49.

Asked by: MatthewF

I have a perl script that runs on my linux servers, but it fails on 2 of them with the following error:

Can't call method "login" on an undefined value at ftp.pl line 49.

 I believe the all the server are all the perl version and modules.

$ftp = Net::FTP->new("$ht", Debug => 1)  or &fail;
     49 $ftp->login("sitsend",decrypted) or &fail;  
     50 $msg = "Connection msg: ".$ftp->message."";
     51 print "Connected new  ".$ftp->message."\n";  ### for testing
     52 $ftp->quit;

                                  
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Asked On
2009-04-28 at 06:57:24ID24361665
Topic

Perl Programming Language

Participating Experts
1
Points
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Comments
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Answers

 

by: Adam314Posted on 2009-04-28 at 07:46:38ID: 24251344

If the Net::FTP module can't connect, it'll return undef.  So on line 1, it tries to connect.  If it can't, it calls your fail subroutine.  Does this subroutine exit, or does it return?  If it returns, your program will then try to login on line 2/49.  This will give you the error you are seeing.

 

by: MatthewFPosted on 2009-04-28 at 08:31:44ID: 24251880

So &fail does not run.  This is &fail

if ($msg !~ /Virtual user test logged in/ && not -e "$location/$ht.ftpflag") {
open MAIL,"|/usr/bin/mailx -s $sub $TO";
print MAIL $down_msg;
close MAIL;
`echo "Unable to ftp into $ht at $mon/$mday $hour:$min" >> $log`;
`echo "$ht" > $location/$ht.ftpflag`;
exit;
 }
}






 

by: Adam314Posted on 2009-04-28 at 08:34:14ID: 24251909

In fail, from where does $msg come?  What are $location and $ht?  Unless the conditions on the first line you posted are met, the exit statement will not be executed, and the fail subroutine will return, allowing the line 2/49 in your original post to execute.

 

by: MatthewFPosted on 2009-04-28 at 08:36:53ID: 24251938

$ht=`hostname`;
chomp $ht;
$location="/opt/bin/agents/monitor";
$down_msg="Unable to ftp into $ht" ;


Additionally, I ftped the script from a server that is working

 

by: Adam314Posted on 2009-04-28 at 08:49:16ID: 24252085

try this change

sub fail {
    ...
    if ($msg !~ /Virtual user test logged in/ && not -e "$location/$ht.ftpflag") {
        open MAIL,"|/usr/bin/mailx -s $sub $TO";
        print MAIL $down_msg;
        close MAIL;
        `echo "Unable to ftp into $ht at $mon/$mday $hour:$min" >> $log`;
        `echo "$ht" > $location/$ht.ftpflag`;
        exit;
    }
    else {                                #NEW
        die "sub fail: did not exit\n";   #NEW
    }                                     #NEW
}

                                              
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by: MatthewFPosted on 2009-04-29 at 10:54:30ID: 31575460

Adam,
 it turned out ftp was down .. lol... tks for the help

20120131-EE-VQP-002

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