1COMEDI_STRERROR(3)             Comedi reference             COMEDI_STRERROR(3)
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NAME

6       comedi_strerror - return string describing Comedilib error code
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SYNOPSIS

9       #include <comedilib.h>
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11       const char * comedi_strerror(int errnum);
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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 with comedi_errno. This error
17       number can be converted to a human-readable form by the functions
18       comedi_perror or 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_strerror returns a pointer to a character string
27       describing the Comedilib error errnum. The returned string may be
28       modified by a subsequent call to a strerr or perror function (either
29       the libc or Comedilib versions). An unrecognized error number will
30       return a pointer to the string “undefined error”, or similar.
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AUTHORS

33       David Schleef <ds@schleef.org>
34           Author.
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36       Frank Mori Hess <fmhess@users.sourceforge.net>
37           Author.
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39       Herman Bruyninckx <Herman.Bruyninckx@mech.kuleuven.ac.be>
40           Author.
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42       Bernd Porr <tech@linux-usb-daq.co.uk>
43           Author.
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45       Ian Abbott <abbotti@mev.co.uk>
46           Author.
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48       Éric Piel <piel@delmic.com>
49           Author.
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52       Copyright © 1998-2003 David Schleef
53       Copyright © 2001-2003, 2005, 2008 Frank Mori Hess
54       Copyright © 2002-2003 Herman Bruyninckx
55       Copyright © 2012 Bernd Porr
56       Copyright © 2012 Ian Abbott
57       Copyright © 2012, 2015 Éric Piel
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59       This document is part of Comedilib. In the context of this document,
60       the term "source code" as defined by the license is interpreted as the
61       XML source.
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63       This library is free software; you can redistribute it and/or modify it
64       under the terms of the GNU Lesser General Public License as published
65       by the Free Software Foundation, version 2.1 of the License.
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67       This library is distributed in the hope that it will be useful, but
68       WITHOUT ANY WARRANTY; without even the implied warranty of
69       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
70       General Public License for more details.
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72       You should have received a copy of the GNU Lesser General Public
73       License along with this library; if not, write to the Free Software
74       Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
75       USA.
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80Comedi                            05/11/2017                COMEDI_STRERROR(3)
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