COMEDI_PERROR(3)

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

💖 COMEDI_PERROR(3) 💖

okay bestie, welcome to the <comedi_perror> page from the Comedi reference section of the manual, and no cap, this one is short but it's a little lifesaver when your code is being dramatic 💅

✨ NAME ✨

comedi_perror — print a Comedilib error message 🌸

🦋 SYNOPSIS 🦋

#include <comedilib.h>

void comedi_perror(const char * s);

💜 DESCRIPTION 💜

so here's the tea 🍓 — when a Comedilib function fails, it usually returns -1 or NULL, depending on the return type. and there's this internal library variable that quietly stores an error number, iykyk, and you can grab it with comedi_errno. that error number can then be turned into a human-readable form by the functions comedi_perror or comedi_strerror. ✨

these functions are literally intended to mimic the behavior of the standard C library functions perror, strerror, and errno. and the key detail here bestie — Comedilib functions sometimes return an error that is generated inside the C library, and in that case the comedi error message is the same as the C library's. periodt. 💀

and now the main character herself: the function comedi_perror prints an error message to the standard error output stream stderr. 👑

that error message is made of:

  • the argument string s,
  • a colon,
  • a space,
  • a description of the error condition,
  • and a new line.

that's it, that's the whole vibe 🎀

👑 AUTHORS 👑

  • 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.

⚠️ okay and just so we're clear bestie: WITHOUT ANY WARRANTY and WITHOUT ANY... FITNESS FOR A PARTICULAR PURPOSE — that's not me being cute, that is the actual legal wording and it is doing the absolute most. 🌈

and that's the whole page, queen 👑 this one came from the Comedi manual collection, dated 03/20/2026, filed under COMEDI_PERROR(3). slay, go forth and debug 💖✨🦋

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