1COMEDI_LOGLEVEL(3) Comedi reference COMEDI_LOGLEVEL(3)
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6 comedi_loglevel - change Comedilib logging properties
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9 #include <comedilib.h>
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11 int comedi_loglevel(int loglevel);
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14 This function affects the output of debugging and error messages from
15 Comedilib. By increasing the log level loglevel, additional debugging
16 information will be printed. Error and debugging messages are printed
17 to the standard error output stream stderr.
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19 The default loglevel can be set by using the environment variable
20 COMEDI_LOGLEVEL. The default log level is 1.
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22 In order to conserve resources, some debugging information is disabled
23 by default when Comedilib is compiled.
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25 The meaning of the log levels is as follows:
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27 ┌─────────┬────────────────────────────┐
28 │Loglevel │ Behavior │
29 ├─────────┼────────────────────────────┤
30 │0 │ Comedilib prints nothing. │
31 ├─────────┼────────────────────────────┤
32 │1 │ (default) Comedilib prints │
33 │ │ error messages when │
34 │ │ there is a │
35 │ │ self-consistency error │
36 │ │ (i.e., an internal bug.) │
37 ├─────────┼────────────────────────────┤
38 │2 │ Comedilib prints an error │
39 │ │ message when an invalid │
40 │ │ parameter is passed. │
41 ├─────────┼────────────────────────────┤
42 │3 │ Comedilib prints an error │
43 │ │ message whenever an │
44 │ │ error is generated in │
45 │ │ the Comedilib library or │
46 │ │ in the C library, │
47 │ │ when called by │
48 │ │ Comedilib. │
49 ├─────────┼────────────────────────────┤
50 │4 │ Comedilib prints a lot of │
51 │ │ junk. │
52 └─────────┴────────────────────────────┘
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55 This function returns the previous log level.
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58 David Schleef <ds@schleef.org>
59 Author.
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61 Frank Mori Hess <fmhess@users.sourceforge.net>
62 Author.
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64 Herman Bruyninckx <Herman.Bruyninckx@mech.kuleuven.ac.be>
65 Author.
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67 Bernd Porr <tech@linux-usb-daq.co.uk>
68 Author.
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70 Ian Abbott <abbotti@mev.co.uk>
71 Author.
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73 Éric Piel <piel@delmic.com>
74 Author.
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77 Copyright © 1998-2003 David Schleef
78 Copyright © 2001-2003, 2005, 2008 Frank Mori Hess
79 Copyright © 2002-2003 Herman Bruyninckx
80 Copyright © 2012 Bernd Porr
81 Copyright © 2012 Ian Abbott
82 Copyright © 2012, 2015 Éric Piel
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84 This document is part of Comedilib. In the context of this document,
85 the term "source code" as defined by the license is interpreted as the
86 XML source.
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88 This library is free software; you can redistribute it and/or modify it
89 under the terms of the GNU Lesser General Public License as published
90 by the Free Software Foundation, version 2.1 of the License.
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92 This library is distributed in the hope that it will be useful, but
93 WITHOUT ANY WARRANTY; without even the implied warranty of
94 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
95 General Public License for more details.
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97 You should have received a copy of the GNU Lesser General Public
98 License along with this library; if not, write to the Free Software
99 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
100 USA.
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105Comedi 05/11/2017 COMEDI_LOGLEVEL(3)