I am working on a script that will run on Redhat 6.5 with Perl 5.10.1 and an Oracle 11.2.0.3 client. I need to connect to a few dozen Oracle databases using 10g, 11g or 12c. Unfortunately, there are two possible passwords that could get used, and I don't have a list of which password to try. Hence, I want to try one password and if that does not work try the other. Otherwise, I will just add it to an array that will print out at the end and I can look at those databases and possibly change the password. I am using the system to connect to every database.

How should I do the error handling to deal with not being able to connect to a database? Also when I get an error and try to exit, the script doesn't exit, but restarts from the beginning. How can I change that behavior?

Thanks in advance! 
sub connect_to_db {
   my $tns_name            = shift;
   my $logger              = shift;
   my $run_as_user         = shift;
   my $system_password     = shift;
   my $system_password2    = shift;

   my $dbh;
   my $correct_password;

#  try connecting with one password then the other, if both passwords 
+fail mark it as failed
   try {
      $dbh = DBI->connect( "DBI:Oracle:".$tns_name, $run_as_user, $sys
+tem_password,
           { PrintError => 1, RaiseError => 1, AutoCommit => 1 } );
      $correct_password = $system_password;
   } catch {
      print "wrong password, try another\n";
   };


   if ( undef $dbh ) {
      try {
         $logger->info( 'password two |'.$system_password2.'|');
         $dbh = DBI->connect("DBI:Oracle:".$tns_name,  $run_as_user, $
+system_password2,
              { PrintError => 1, RaiseError => 1, AutoCommit => 1 } );
         $correct_password = $system_password2;
      } catch {
         print "wrong password, add it to the connection issues list\n
+";
      };
   }

   if ( undef $dbh ) {
      push @db_connect_issues, "error:".$tns_name." -- ".$DBI::errstr;
   } else {
      $users_and_passwords{ 'INSTALLER'}{$run_as_user } = $correct_pas
+sword;
      print ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> The right password is
+ $correct_password <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n";
   }

   return $dbh;
}

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In reply to error handling with dbi by gandolf989

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