debian man page for comedi_perror

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)