POSTFIX2DLF_PRE.IN(1)

📦 version 2.1.1, in arch rolling

💅 postfix2dlf_pre — like, the manual (POSTFIX2DLF_PRE.IN(1)) 🎀

okay bestie, so this is from LogReport's Lire Documentation, and the page is literally called POSTFIX2DLF_PRE.IN(1). buckle up, it's a short one and it's kinda iconic ngl 💖

✨ NAME ✨

postfix2dlf_pre — the little preprocessor bestie that gets your postfix logfiles ready for postfix2dlf_main 🦋

🌸 SYNOPSIS 🌸

postfix2dlf_pre dumpfile

that's it. one argument. main character energy tbh 👑

💜 DESCRIPTION 💜

so here's the vibe: postfix2dlf_pre expects a postfix logfile on STDIN. it prints the preprocessed logfile lines out to STDOUT, and — plot twist — it also creates a Berkeley DB holding a mapping from hostname-queueid to number-of-lines-with-this-id. like a little lookup table, slay ✨

and dumpfile? that's just where the dump goes, and it can be stuff like /tmp/dump, ../../var/dump or literally just dump. no cap, all three are valid 🫶

🧚 DEVELOPERS 🧚

if you're the dev type (iykyk), you can use the lr_anondump tool to peek at the contents of the dumpfile. it's giving behind-the-scenes content 💅

for example, run:

$ zcat postfix.log.gz | ./postfix2dlf_pre /tmp/stem > /tmp/pre
$ lr_anondump /tmp/stem
$ ./postfix2dlf_main /tmp/stem < /tmp/pre > /tmp/post

that lone . at the end? yeah it's there in the original too, we keep it 😭

🍓 EXAMPLE 🍓

okay so take this raw log file, absolute mess, love that for it:

Dec 1 04:02:56 internetsrv postfix/pickup[20919]: 693A3578E:
 uid=0 from=<root>
Dec 1 04:02:56 internetsrv postfix/cleanup[20921]: 693A3578E:
 message-id=<john.doe.1@example.com>
Dec 1 04:02:57 internetsrv postfix/qmgr[20164]: 693A3578E:
 from=<john.doe.2@example.com>, size=617 (queue active)
Dec 1 04:02:58 internetsrv postfix/local[20924]: 693A3578E:
 to=<john.doe.2@example.com>, relay=local, delay=3, status=sent
 (forwarded as E325C578D)

and it will get converted to this glorious glow-up:

dlfid internetsrv693A3578E from_relay_host localhost from_relay_ip
 127.0.0.1 logrelay internetsrv queueid 693A3578E time 1007175776
 type pickup
dlfid internetsrv693A3578E logrelay internetsrv msgid
 <john.doe.1@example.com> queueid 693A3578E time 1007175776 type cleanup
dlfid internetsrv693A3578E from_domain example.com from_relay_host
 localhost from_relay_ip 127.0.0.1 from_user john.doe.2 logrelay
 internetsrv queueid 693A3578E size 617 time 1007175777 type qmgr
delay 3 dlfid internetsrv693A3578E logrelay internetsrv queueid
 693A3578E stat sent time 1007175778 to_domain example.com
 to_relay_host localhost to_relay_ip 127.0.0.1 to_user john.doe.2
 type local xstat (forwarded_as_e325c578d)

look at all those fields. immaculate. 💅✨

👑 EXAMPLES 👑

ngl, postfix2dlf_pre will be rarely used on its own — it's a supporting character, fr fr. it gets called by postfix2dlf(1). so if you want examples and usage info, go refer to the postfix2dlf manpage, that's where the full lore lives 📖💜

🔥 SEE ALSO 🔥

the whole friend group, honestly 🫶

⭐ VERSION ⭐

$Id: postfix2dlf_pre.in,v 1.13 2006/07/23 13:16:34 vanbaal Exp $

Copyright (C) 2002 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.

⚠️ okay but fr fr, that warranty disclaimer is NOT a joke — no warranty of ANY kind, not even for merchantability or fitness for a particular purpose. read the GNU GPL for the full details bestie 🙈

🎀 AUTHOR 🎀

Joost van Baal

okay that's the whole page, and to sign off properly: this is Lire 2.1.1, dated 2025-09-28, and it's literally the POSTFIX2DLF_PRE.IN(1) page. go forth and preprocess, bestie 🌈💖✨

📦 where this page comes from