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Full Discussion: How to read email using mailx in shell script or perl
Top Forums Shell Programming and Scripting How to read email using mailx in shell script or perl Post 302177263 by quine on Thursday 20th of March 2008 01:27:26 PM
Old 03-20-2008
Perl supports opening pipes to processes as well as files.... so...

open(HNDL, "mailx -args |");

That last character is a PIPE. I don't remember all the args you need (I think mailx by default first gives you only headers, but there is an argument that tells it "just dump the whole mailbox")

So now you can do something like

while (<HNDL>)
{
# do all your parsing code line by line subjects AND bodies
}

close(HNDL);

Now this is WAY over simplified, because after you dump the mailbox you have to execute mailx again like system("mailx -args bla bla bla") or die;
or qx|mailx -args bla bla bla|, etc to DELETE the mail you've just read. But you have to be careful that you don't delete NEW mail that comes into the box while you are reading so count the headers and delete only those perhaps with something like mailx -d1-10 or something like that... Also, I don't know what kind of mail might show up in this box -- could it have attachments, etc.

There is a whole other approach you might find useful... I used to set up special accounts whose only purpose was to receive email of a certain kind, etc. Like we would tell our trading partners to send all X12 data to xyzaccount@myhost.com or what ever... xyzaccount then had a .forward file and the .forward REDIRECTED the email into my perl scripts...

so .forward would be something like "| myscript.pl". Thus everytime mail was received by xyzaccount it would be immediately piped to the script, one mail at a time. No need to open and read the mailbox....

Now one issue there is that sometimes for security reasons sysadmins won't let you FORWARD email to a PROCESS (as opposed to just another address). We had no problem with this since we expected only ONE kind of mail in that account and the first thing myscript.pl would do is make sure that it was the kind of mail we were expecting. If not, we just quit, issue a warning, etc.

quine@sonic.net
 

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LEARN ABOUT DEBIAN

lr_deanonymize

LR_DEANONYMIZE.IN(1)					  LogReport's Lire Documentation				      LR_DEANONYMIZE.IN(1)

NAME

       lr_deanonymize - restore anonymized data, using a dump as produced by lr_anonymize(1)

SYNOPSIS

       lr_deanonymize dumpfilestem

DESCRIPTION

       lr_deanonymize is typically used when receiving anonymized reports from a responder.  See the section on "Processing The Responder's
       Results" in the chapter on "Using A Responder" in the Lire User Manual for usage examples.

       lr_deanonymize reads a file containing anonymized emailaddresses, ipnumbers, and hostnames (typically a report, generated from a logfile
       from an internet service) from stdin, and prints a "deanonymized" version of this file to stdout. It reads its information to do this from
       a bunch of Berkeley DB's, stored in files whose's names are derived from dumpfilestem, as produced by lr_anonymize(1).

EXAMPLE

       A 'logfile' like e.g.

	blaat fkrf 1.2.3.4.in-addr.arpa] pietje@bigcompany.com bla 1 2 3 lj;agas;gag
	blaat 1.2.3.4 fkrf 3.2.3.4.in-addr.arpa] bla 1 www.hotsex.com 2 3 lj;agas;gag
	jan@blaat.frut.com agagag
	blaat fkrf 4.2.3.4.in-addr.arpa] bla pietje@bigcompany.com www.hotsex.com
	234.34.2.0 jan@blaat.frut.com 4.2.3.4.in-addr.arpa1 2 3 lj;agas;gag
	blaat fkrf tweede 3.2.3.4.in-addr.arpa] bla 1.2.3.4 1 blablabla.com
	2 mdcc.cx
	3 lj;agas;gag

       wil get anonymized to

	blaat fkrf 1.0.0.10.in-addr.arpa] john.doe.1@example.com bla 1 2 3 lj;agas;gag
	blaat 10.0.0.1 fkrf 2.0.0.10.in-addr.arpa] bla 1 1.example.com 2 3 lj;agas;gag
	john.doe.2@example.com agagag
	blaat fkrf 3.0.0.10.in-addr.arpa] bla john.doe.1@example.com 1.example.com
	10.0.0.2 john.doe.2@example.com 3.0.0.10.in-addr.arpa1 2 3 lj;agas;gag
	blaat fkrf tweede 2.0.0.10.in-addr.arpa] bla 10.0.0.1 1 2.example.com
	2 3.example.com
	3 lj;agas;gag

       The dump will look like

	ip 234.34.2.0 10.0.0.2
	ip 1.2.3.4 10.0.0.1
	inaddr 3.2.3.4.in-addr.arpa 2.0.0.10.in-addr.arpa
	inaddr 1.2.3.4.in-addr.arpa 1.0.0.10.in-addr.arpa
	inaddr 4.2.3.4.in-addr.arpa 3.0.0.10.in-addr.arpa
	domain mdcc.cx 3.example.com
	domain blablabla.com 2.example.com
	domain www.hotsex.com 1.example.com
	email jan@blaat.frut.com john.doe.2@example.com
	email pietje@bigcompany.com john.doe.1@example.com

SEE ALSO

       lr_anonymize(1)

VERSION

       $Id: lr_deanonymize.in,v 1.4 2006/07/23 13:16:32 vanbaal Exp $

COPYRIGHT

       Copyright (C) 2000-2001 Stichting LogReport Foundation LogReport@LogReport.org

       This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by
       the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

       This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

       You should have received a copy of the GNU General Public License along with this program (see COPYING); if not, check with
       http://www.gnu.org/copyleft/gpl.html.

AUTHOR

       Joost van Baal <joostvb@logreport.org>

Lire 2.1.1							    2006-07-23						      LR_DEANONYMIZE.IN(1)
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