COMEDI_GET_READ_SUBD(3)

💖 COMEDI_GET_READ_SUBD(3) 💖

okay bestie, listen up — this is a page from the Comedi reference, section 3, and it's about one little function that finds your streaming input subdevice. short page, huge vibes, let's go 🦋

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✨ NAME ✨

comedi_get_read_subdevice — find the streaming input subdevice 👑

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🌸 SYNOPSIS 🌸

#include <comedilib.h>

int comedi_get_read_subdevice(comedi_t * device);

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🎀 DESCRIPTION 🎀

so comedi_get_read_subdevice hands you back the index of the subdevice whose streaming input buffer is, like, currently accessible through the device device — but only if there even is one. if there's no such subdevice, girl, there's no such subdevice 🤷♀️

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💅 RETURN VALUE 💅

on success, comedi_get_read_subdevice returns the index of the current "read" subdevice if one exists — or -1 if there is no "read" subdevice at all.

on failure? also -1. yeah. it's giving ambiguous, we know, but that's literally what it does 💀

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👑 AUTHORS 👑

the icons who made this happen:

• 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.

⚠️ bestie, note the WITHOUT ANY WARRANTY energy — no promises, no cap, read the license fr fr 📜

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that's the whole page, short and sweet 🫶 this one's from Comedi, dated 03/20/2026, filed under COMEDI_GET_READ_SUBD(3) — and that's a wrap, periodt 💖 ✨