I am seeing an error reading: Use of uninitialized value $email in print at /home/hesco/lib/perl/ETC/parse_email.pl line 13., when I invoke a pipe, like this:

cat /home/hesco/lib/perl/ETC/etc/vote2009.mbox | formail -s | /home/he
+sco/lib/perl/ETC/parse_email.pl
[download]

That code begins like so:

#!/usr/bin/perl
use strict;
use warnings;
use Data::Dumper;

use lib qw( /home/hesco/lib/perl );
use parser;

my $email = $ARGV[0];

my($start,$to,$name,$pid,$key);
open('EMAIL','>','/tmp/email_throw_away');
  print EMAIL $email; # <--- error here ???
close(EMAIL);
[download]

and if I pipe that cat output to less instead of through my filter, I get what appears to be an email. How is it that value would be uninitialized?

So next I copied my .mbox file to itself, giving it a new extension of .sample, and edit the .sample so that it contains ONLY a single email, dropped the formail invocation from my pipe and try this:

cat /home/hesco/lib/perl/ETC/etc/vote2009.sample | /home/hesco/lib/per
+l/ETC/parse_email.pl
[download]

yielding the same result:

Use of uninitialized value $email in print at /home/hesco/lib/perl/ETC
+/parse_email.pl line 13.
[download]

And now I am really confused.

-- Hugh

UPDATE:

mortiz, zwon: So you are right. This seems to work much better:

cat /home/hesco/lib/perl/ETC/etc/vote2009.mbox | formail -s | /home/he
+sco/lib/perl/ETC/parse_email.pl -
[download]

Now to figure out why my formail -s is only giving me the first email in the mbox file. Thanks folks!

Never mind on that. formail -s expects the filter as an argument to the -s switch, not to pipe STDOUT to the filter. Issue resolved with:

cat /home/hesco/lib/perl/ETC/etc/vote2009.mbox | formail -s /home/hesc
+o/lib/perl/ETC/parse_email.pl -
[download]

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