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COMEDI_LOGLEVEL(3) Comedi reference COMEDI_LOGLEVEL(3)

NAME

comedi_loglevel - change Comedilib logging properties

SYNOPSIS

#include <comedilib.h>

int comedi_loglevel(int loglevel);

DESCRIPTION

This function affects the output of debugging and error messages from Comedilib. By increasing the log level loglevel, additional debugging information will be printed. Error and debugging messages are printed to the standard error output stream stderr.

The default loglevel can be set by using the environment variable COMEDI_LOGLEVEL. The default log level is 1.

In order to conserve resources, some debugging information is disabled by default when Comedilib is compiled.

The meaning of the log levels is as follows:

Loglevel Behavior
0 Comedilib prints nothing.
1 (default) Comedilib prints error messages when there is a self-consistency error (i.e., an internal bug.)
2 Comedilib prints an error message when an invalid parameter is passed.
3 Comedilib prints an error message whenever an error is generated in the Comedilib library or in the C library, when called by Comedilib.
4 Comedilib prints a lot of junk.

RETURN VALUE

This function returns the previous log level.

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

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.

06/02/2020 Comedi