We have a little *BSD box here that we are no longer getting support for. Among other things it is our SMTP gateway using Sendmail. I have the task of reverse-enbineering the alias file for it (it is built directly from a database that we do not have access too).

I wrote this; 

#!/usr/bin/perl -w

use DB_File;
use strict;

my %DB;
my $key;
my $val;

tie (%DB, "DB_File", "./igusers.db", O_RDONLY, 0644, $DB_HASH);

while (($key, $val) = each %DB) {

  print "$key = $val2\n";

}

untie(%DB);

[download]
In hopes of it being simple. Ofcourse it is not... A sample of the output from $val looks like this; 
mat071 = Ômat071*mat071ex group dlÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
+ÿÿÿÿÿÿÿÿÿÿÿÿexchforwardÿÿÿÿÿÿÿÿ¡ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ

[download]
From there I tried; 
#!/usr/bin/perl -w

use DB_File;
use strict;

my %DB;
my $key;
my $val;
my $val2;

tie (%DB, "DB_File", "./igusers.db", O_RDONLY, 0644, $DB_HASH);

while (($key, $val) = each %DB) {

  $val2 = ref($val);
  print "$key = $val2\n";

}

untie(%DB);

[download]
but then $val2 has nothing in it. Can someone kick me in the butt and let me know what I am doing wrong here.

Thanks,

Kahn

In reply to Reverse-Engineering sendmails alias file by kahn

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.