COMEDI_LOGLEVEL(3)

💖 COMEDI_LOGLEVEL 💖

the comedi_loglevel(3) page, but make it a group chat 🎀

okay bestie, so this is a page from the Comedi reference manual — section 3, library functions, you know the vibe ✨

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✨ NAME ✨

comedi_loglevel — change Comedilib logging properties 🦋

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✨ SYNOPSIS ✨

#include <comedilib.h>

int comedi_loglevel(int loglevel);

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✨ DESCRIPTION ✨

so like. this function controls how much Comedilib yaps at you. it affects the output of all the debugging and error messages coming out of Comedilib, and by cranking the log level loglevel up, you get more debugging info printed. where does it all go? straight to the standard error output stream stderr, obviously 💅

you can set the default loglevel with the environment variable COMEDI_LOGLEVEL. the default log level is 1. (yes, 1. remember that.)

also, real talk: in order to conserve resources, some debugging information is disabled by default when Comedilib is compiled. so no, turning the knob up doesn't magically resurrect everything. it's giving "compiled without debug info" energy 😭

ok so here's what each log level actually means, no cap:

• 0 — Comedilib prints nothing. absolute silence. iconic. 🤫
• 1 — (default) Comedilib prints error messages when there is a self-consistency error (i.e., an internal bug.) 🙈
• 2 — Comedilib prints an error message when an invalid parameter is passed. 🍓
• 3 — Comedilib prints an error message whenever an error is generated in the Comedilib library or in the C library, when called by Comedilib. 🔥
• 4 — Comedilib prints a lot of junk. 💀

that 4 row is not a joke, bestie. it is literally described as "a lot of junk." you asked for it, you got it.

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✨ RETURN VALUE ✨

it returns the previous log level — so yes, you can save it, do your chaotic debugging, and put it back exactly where it was. main character energy 👑

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✨ AUTHORS ✨

these are the legends who wrote it, periodt:

• David Schleef <ds@schleef.org> — Author.
• Frank Mori Hess <fmhess@users.sourceforge.net> — Author.
• Herman Bruyninckx <Herman.Bruyninckx@mech.kuleuven.ac.be> — Author.
• Bernd Porr <tech@linux-usb-daq.co.uk> — Author.
• Ian Abbott <abbotti@mev.co.uk> — Author.
• Éric Piel <piel@delmic.com> — Author.

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✨ COPYRIGHT ✨

Copyright © 1998-2003 David Schleef Copyright © 2001-2003, 2005, 2008 Frank Mori Hess Copyright © 2002-2003 Herman Bruyninckx Copyright © 2012 Bernd Porr Copyright © 2012 Ian Abbott Copyright © 2012, 2015 Éric Piel

This document is part of Comedilib. In the context of this document, the term "source code" as defined by the license is interpreted as the XML source.

This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, version 2.1 of the License. 🌈

This library 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

🫶 legal besties, please read that bit properly — it's the actual license, not a vibe.

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ok that's the whole page, you ate it 💅 this was Comedi, dated 03/20/2026, from the COMEDI_LOGLEVEL(3) page — go forth and log responsibly, bestie 💜🌸✨