COMEDI_GET_WRITE_SUB(3)

📦
version 0.11.0+5 · 7 versions
, in ubuntu resolute, ubuntu stonking

✨ comedi_get_write_subdevice ✨

okay bestie, welcome to the Comedi reference manual 💖 this one's comedi_get_write_subdevice from the Comedi library, and it's genuinely such a little icon. here's everything you need, no cap.

🌸 NAME 🌸

comedi_get_write_subdevice — find streaming output subdevice

it does literally what it says on the tin, i promise 🎀

🦋 SYNOPSIS 🦋

#include <comedilib.h>

int comedi_get_write_subdevice(comedi_t * device);

that's it. one header, one function, one pointer argument. clean. minimal. ate 💅

👑 DESCRIPTION 👑

so bestie, comedi_get_write_subdevice returns the index of the subdevice whose streaming output buffer is currently accessible through the device device, if there is one.

that's the whole vibe. you hand it a device, it tells you which subdevice is the current "write" one. if there isn't one... keep reading, we get into it 🌈

⭐ RETURN VALUE ⭐

okay here's the part where you gotta pay attention, fr fr:

  • On success, comedi_get_write_subdevice returns the index of the current "write" subdevice if there is one, or -1 if there is no "write" subdevice. so -1 can just mean "nope, nothing here" and that's a valid success answer 😭
  • On failure, -1 is returned.
ngl the way -1 does double duty here is lowkey giving chaos energy 💀 it's both "no write subdevice exists" and "something went wrong", so stay woke.

🧚 AUTHORS 🧚

these are the main characters who made this happen, show some respect 👑

  • 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 © 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 do not skip this part, the license is not a suggestion, it's the whole point 🫶

and that's the page, bestie ✨ this was COMEDI_GET_WRITE_SUB(3) from the Comedi reference, dropped by Comedi and dated 03/20/2026 — go forth and stream your output, you got this 🌸💅🎀

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