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.

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

       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.