COMEDI_PERROR(3) Comedi reference COMEDI_PERROR(3)
NAME
comedi_perror - print a Comedilib error message
SYNOPSIS
#include <comedilib.h>
void comedi_perror(const char * s);
DESCRIPTION
When a Comedilib function fails, it usually returns -1 or NULL, depending on the return type. An internal library variable stores an error
number, which can be retrieved with comedi_errno. This error number can be converted to a human-readable form by the functions
comedi_perror or comedi_strerror.
These functions are intended to mimic the behavior of the standard C library functions perror, strerror, and errno. In particular,
Comedilib functions sometimes return an error that is generated inside the C library; the comedi error message in this case is the same as
the C library.
The function comedi_perror prints an error message to the standard error output stream stderr. The error message consists of the argument
string s, a colon, a space, a description of the error condition, and a new line.
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.
COPYRIGHT
Copyright (C) 1998-2003 David Schleef
Copyright (C) 2001-2003, 2005, 2008 Frank Mori Hess
Copyright (C) 2002-2003 Herman Bruyninckx
Copyright (C) 2012 Bernd Porr
Copyright (C) 2012 Ian Abbott
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.
Comedi 07/06/2012 COMEDI_PERROR(3)