1COMEDI_ERRNO(3)                Comedi reference                COMEDI_ERRNO(3)
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NAME

6       comedi_errno - number of last Comedilib error
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SYNOPSIS

9       #include <comedilib.h>
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11       int comedi_errno(void);
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DESCRIPTION

14       When a Comedilib function fails, it usually returns -1 or NULL,
15       depending on the return type. An internal library variable stores an
16       error number, which can be retrieved by calling comedi_errno This error
17       number can be converted to a human-readable form by the functions
18       comedi_perror and comedi_strerror.
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20       These functions are intended to mimic the behavior of the standard C
21       library functions perror, strerror, and errno. In particular, Comedilib
22       functions sometimes return an error that is generated inside the C
23       library; the comedi error message in this case is the same as the C
24       library.
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26       The function comedi_errno returns an integer describing the most recent
27       Comedilib error. This integer may be used as the errnum parameter for
28       comedi_strerror.
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AUTHORS

31       David Schleef <ds@schleef.org>
32           Author.
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34       Frank Mori Hess <fmhess@users.sourceforge.net>
35           Author.
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37       Herman Bruyninckx <Herman.Bruyninckx@mech.kuleuven.ac.be>
38           Author.
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40       Bernd Porr <tech@linux-usb-daq.co.uk>
41           Author.
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43       Ian Abbott <abbotti@mev.co.uk>
44           Author.
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46       Éric Piel <piel@delmic.com>
47           Author.
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50       Copyright © 1998-2003 David Schleef
51       Copyright © 2001-2003, 2005, 2008 Frank Mori Hess
52       Copyright © 2002-2003 Herman Bruyninckx
53       Copyright © 2012 Bernd Porr
54       Copyright © 2012 Ian Abbott
55       Copyright © 2012, 2015 Éric Piel
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57       This document is part of Comedilib. In the context of this document,
58       the term "source code" as defined by the license is interpreted as the
59       XML source.
60
61       This library is free software; you can redistribute it and/or modify it
62       under the terms of the GNU Lesser General Public License as published
63       by the Free Software Foundation, version 2.1 of the License.
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65       This library is distributed in the hope that it will be useful, but
66       WITHOUT ANY WARRANTY; without even the implied warranty of
67       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
68       General Public License for more details.
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70       You should have received a copy of the GNU Lesser General Public
71       License along with this library; if not, write to the Free Software
72       Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
73       USA.
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78Comedi                            05/11/2017                   COMEDI_ERRNO(3)
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