Unix: Oracle User Identified Externally

I am migrating an Oracle 9i to Oracle 10g database, and Perl 5.0.4 to
Perl 5.8.7 in Sun Solaris environment.

My old Perl/DBI script was able to connect via this method:
use DBI;
$dbd = 'Oracle';
$user = '/'; $password = '/';
$dbh = DBI->connect ($dbname, $user, $password, $dbd);

This is not working with new version of Perl/DBI.

I have changed script to connect correctly:
use DBI;
$dbd = 'Oracle';
$user = 'scott'; $password = 'tiger';
$dbh = DBI->connect ("dbi:$dbd:$dbname",$user, $password);

But need to be able to connect with user identified externally (as
before).

I cannot find documentation on proper syntax or if a fix was made in
later version of DBI.

Can anyone help?

Mark Cummings

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