COMEDI_DIO_GET_CONFI(3)

💅 comedi_dio_get_config — a lil' page from the Comedi reference manual (section 3, bestie) ✨

okay so before we even start: this is comedi_dio_get_config, living in the Comedi reference man pages, section 3. she's a lil function, she's got one job, and she does it flawlessly. let's get into it 🫶

---

🌸 NAME 🌸

comedi_dio_get_config — query the input/output properties of a channel. that's it, that's the whole vibe check. we're asking a channel "hey babe, are you an input or an output?" 💖

---

🦋 SYNOPSIS 🦋

#include <comedilib.h>

int comedi_dio_get_config(comedi_t * device, unsigned int subdevice,
                          unsigned int channel,
                          unsigned int * direction);

look at her. four args, returns an int, so lowkey simple and so highkey iconic ✨

---

🎀 DESCRIPTION 🎀

okay so here's the tea ☕ — comedi_dio_get_config queries the input/output configuration of one individual channel in a digital I/O subdevice. just the one. not the whole subdevice, not the whole board, one channel, main character energy only 👑

(and if you wanna know how you set that config instead of just peeking at it, go check out comedi_dio_config, the sister function, iykyk 💅)

on success, *direction gets set to either COMEDI_INPUT or COMEDI_OUTPUT. that's the whole reveal. she tells you which way the data's flowing and moves on with her life 🌈

---

⭐ RETURN VALUE ⭐

• if it worked → 0 is returned 🎉
• if it didn't → -1 😭

that's literally it, no in-between, no grey area, periodt.

---

👑 AUTHORS 👑

these are the legends who made it happen, show some respect fr fr 🫶

• 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.

---

💜 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.

bestie if you're shipping this anywhere, keep the license text with it, no cap, that part is not optional 💀

---

and that's the whole page!! this one came from Comedi, dated 03/20/2026 — thanks for reading all the way through, you ate that fr fr 💅✨💖