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The NetMRG Reference
Brady Alleman
Douglas E. Warner
Copyright © 2003-2007 Brady Alleman and Douglas E. Warner
__________________________________________________________
Table of Contents
I. Overview
1. Introduction
2. Revision History
II. Installation
3. Software Requirements
4. Satisfying Requirements
5. Installation Procedure
6. Upgrade Procedure
III. Reference
I. Manual Pages
netmrg-gatherer -- Gathers data from devices.
7. Contact Information
A. GNU General Public License
Preamble
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND
MODIFICATION
Section 0
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Section 7
Section 8
Section 9
Section 10
NO WARRANTY Section 11
Section 12
How to Apply These Terms to Your New Programs
I. Overview
Table of Contents
1. Introduction
2. Revision History
__________________________________________________________
Chapter 1. Introduction
Welcome to NetMRG! NetMRG is a database-driven network
monitoring and graphing tool for use on Linux systems. It
offers an intuitive web-based configuration, customized
monitoring capabilities for unusual situations, a fast
multi-threaded polling application, and brilliant graphs
rendered by RRDTOOL.
This document aims to guide you swiftly through the
installation and configuration of NetMRG, as well as act as a
reference for those with existing installations.
__________________________________________________________
Chapter 2. Revision History
* 0.20
2008.04.11
Major feature enhancements and bug fixes; Fixed compilation
under GCC 4.3; restructuring of view pages to show graph
titles (for easier in-page searching) and icons for graph
actions; fixed mysql 5 compatibility; added device
properties (keeps track of things like model #, serial #,
etc); added ability to chain interfaces to travel between
them; added ajax monitor selection on graphs.
* 0.19
2006.02.03
Major Feature Enhancements and Bug Fixes; Major Web
Interface redesign to give more room for graphs and ease
overall use. Security enhancements behind the scenes to
ensure correct permissions checking. Added a search
interface that will search groups, devices, sub devies, and
sub device parameters. RRDtool 1.2 support (including graph
smoothing); Depricated use of netmrg_cron.sh in favor of
using netmrg-gatherer; migrated bulk of docs to wiki;
numerous other bugfixes and enhancements.
* 0.18.2
2004.11.09
Minor Bug Fixes; Fixed some escaping problems on the
interface cache page, disabled the 'quickprint' Net-SNMP
option for better compatibility, fixed the snmp-failure
test, fixed an SVO-user view issue, and added failover for
duplicate ifNames when adding interfaces.
* 0.18.1
2004.11.01
Minor Bug Fixes; Fixed a small bug where the gatherer would
not register negative values.
* 0.18
2004.10.25
Major Bug Fixes; Fixed an issue preventing form submissions
on some browsers, fixed PHP string escaping problems, fixed
inability to create inverted stacked graphs, and fixed
parameter substituion and documentation regarding
notifications and responses. Added better support on
FreeBSDs (4.8-5.2) and x86-64 architectures (Linux and
FreeBSD), the ability to multiply summed values, MySQL
timeouts, simple value parsing (to get the numeric content
out of quoted numbers, etc), graphic icons for most
actions, support for a default external auth user (with
regards to permissions), and cleaned up the gatherer build
process output.
* 0.17
2004.09.13
Minor Feature Enhancements; Added colorized gatherer
output, checkbox support on multiple pages, the ability to
disable users, fixed a potential SQL-injection bug, updated
navigation on group pages, updated tutorials.
* 0.16
2004.06.10
Minor Bugfixes and Feature Enhancements; fixed a user
management bug and several bugs related to 'single view
only' users not being able to see graphs, added the ability
to ignore SNMP uptime checks for devices (permitting the
monitoring of broken devices), added the ability to do an
SNMP walk of an OID (useful for the Windows SNMP agent),
enhanced group/device management, cleaned up autoconf (now
supports FC2), and added experimental syslog and daemon
support in the gatherer.
* 0.15
2004.05.20
Minor Bugfixes and Feature Enhancements; fixes for various
db errors (including the infamous one on
snmp_cache_view.php), better cross-platform compilation,
select all/none/invert checkbox support, support for
choosing what graph to apply to an interface, better
support for php < 4.2.0, and some security fixes for
single-view-only users.
* 0.14
2004.03.10
Minor Bugfixes and Feature Enhancements; escaping issues in
template dereferencing, broken links on various pages,
security issues regarding manual SNMP recaching, broken
duplication on non-cutting-edge MySQL, more parameter
substitution in SQL tests, better date parsing for advanced
graph view, nav-bar and group navigation enhancements,
advanced view capability for monitor-only graphs.
* 0.13
2003.12.19
Minor Bugfixes and Feature Enhancements; slide show
ordering, previous slide, resume slide show, better
formatting of 'sums', errors on view editing, fixes to
permissions checking, and an occassional segfault in the
gatherer was fixed.
* 0.12
2003.12.15
Major Feature Enhancents and Bugfixes; added SNMPv2
support, fixed a bug that would cause a device to be
deleted from all groups, fixed session timeout when using
external auth, added checkbox support to interface/disk
cache pages, slide show enhancements, fixed permission
issue where unauthorized users could view/edit test_* pages
* 0.10
2003.10.05
Major bug fix; fixes a db error when trying to view
monitors, a bug that would always set the width and height
to zero when creating graphs, and makes conditions with
'rate of change' work. Many documentation upgrades.
* 0.10pre2
2003.09.15
This release focuses on adding new features and sqaushing
bugs. In addition, there is now an 'updater.php' that is
required to be run between versions. A minor change needs
to be made to everyone's 'netmrg.xml' to add an
'externalauth' field inside the 'website' section.
* 0.10pre1
2003.07.28
Initial publication
II. Installation
Table of Contents
3. Software Requirements
4. Satisfying Requirements
5. Installation Procedure
6. Upgrade Procedure
__________________________________________________________
Chapter 3. Software Requirements
NetMRG Requires the following packages for compilation.
* PHP, Version >= 4.1
* MySQL, Version >= 3.23
* RRDTOOL, Version >= 1.0.28
* Libxml2, Version >= 2.30
* Libstdc++, Version >= 3.2
Versions earlier than this may compile just fine, but may
experience runtime issues. Specifically, we experienced
software crashes on an SMP machine running version 2.96
that were resolved by upgrading to 3.2.
* NET/UCD-SNMP, Version >= 4.2.2
__________________________________________________________
Chapter 4. Satisfying Requirements
Specific instructions to satisfy dependencies for certain
platforms are presented below. They should be used more as
suggestions, not necessarily step-by-step instructions. You may
need to do more than what is listed, or much less, depending on
the options you selected when installing your operating system.
* Red Hat Linux
+ In order to satisfy the libstdc++ requirement, Redhat
8.0 or above is required. NetMRG may not be stable on
older versions of libstdc++.
+ Install the following RPMs from your Red Hat
installation media:
o httpd
o php
o php-mysql
o mysql
o mysql-server
o mysql-devel
o libxml2
o libxml2-devel
o net-snmp
o net-snmp-devel
o net-snmp-utils
+ Installing RRDTOOL
o Download an RRDTOOL RPM from
http://www.freshrpms.net/
o OR Download the RRDTOOL source from
http://www.rrdtool.org/ and compile it.
+ Installing precompiled NetMRG RPM
Download the latest NetMRG RPM and install it as
follows:
$ rpm -Uvh netmrg-0.10.rpm
You will still have to perform the following tasks
listed in the Install Instructions:
o Setup the Database
o Configure Apache
o Configure the Installation
o Setup Crontab
* FreeBSD (4.8)
+ Install the following ports:
o www/apache13
o rrdtool
o net-snmp
o libxml2
o mod_php4 (specify MySQL support)
o lang/gcc32
+ Run configure, specifying gcc32:
./configure 'LDFLAGS=-L/usr/local/gcc3/lib' 'CPPFLAGS=-I/usr/local/gcc3
/include' 'CXX=g++32'
__________________________________________________________
Chapter 5. Installation Procedure
1. Untar to some directory like /tmp/ (it will untar into a
'netmrg' directory)
cd /tmp
wget http://www.netmrg.net/download/release/netmrg.tar.gz
tar xzvf netmrg.tar.gz
2. Now we need to compile and install the source. cd into the
directory made by your tar command and type the following:
./configure
make
make install
Note: If configure fails to locate the needed libraries they
can be manually specified. Run ./configure --help for
details on the necessary options.
3. Setup the database
Now we need to setup the database. Please change at least
the password (netmrgpass below).
mysqladmin create netmrg
mysql -u root -p netmrg < share/netmrg.mysql
mysql -u root -p
> grant all on netmrg.* to netmrguser@localhost identified by 'netmrgpa
ss';
4. You need to modify your apache config in order to make your
NetMRG installation live (commonly in
/etc/httpd/conf/httpd.conf).
The first is to alias /netmrg to the installed web
directory (commonly /usr/local/var/www/netmrg/webfiles).
Alias /netmrg "/usr/local/var/www/netmrg/webfiles"
The easier way (if you're running Apache >= 1.3) is to just
Include the conf file we've created anywhere in your file
(near the bottom is fine).
Include /usr/local/etc/netmrg.conf
You will need to restart your Apache after making config
changes. Telling it to reload its config should be good
enough
killall -HUP httpd
5. Configure the Installation
All of NetMRG's common configuration options are controlled
by an XML file, normally located at
/usr/local/etc/netmrg.xml. You should edit this file to
make any necessary changes before continuing with
installation.
For most installations, you will at least need to edit
netmrg.xml to reflect your database username and password.
6. Setup Permissions
NetMRG does not need superuser permissions to run,
therefore we will setup a user for it.
# useradd netmrg
# chown netmrg:netmrg /usr/local/var/log/netmrg
# chown netmrg:netmrg /usr/local/var/lib/netmrg/rrd
7. Setup crontab
You can setup the crontab entries in two places: either
edit /etc/crontab, or run crontab -e as the netmrg user.
For 'crontab -e', use an entry similar to this:
*/5 * * * * bash -c "if [ -f /usr/local/var/lock/subsys/netmrg ]; then
/usr/local/bin/netmrg-gatherer; fi"
To edit the master crontab, edit /etc/crontab and add a
line similar to this:
*/5 * * * * netmrg bash -c "if [ -f /usr/local/var/lock/subsys/netmrg ]
; then /usr/local/bin/netmrg-gatherer; fi"
8. Point your web browser at your install, and start graphing
things! The default login is admin and the default password
is nimda. Point your web browser at the host you built this
on (something similar to http://yourhost.com/netmrg/) and
please change your password!
__________________________________________________________
Chapter 6. Upgrade Procedure
After doing a 'make install' as described in the chapter on
Installing NetMRG, the next step is to run the web-based
updater. This is accomplished by logging into NetMRG with
administrator privileges, and following the prompts. NetMRG's
web interface will not operate normally and the gatherer will
not run until the web-based upgrade is performed.
Non-administrator users will only receive a message directing
them to contact their NetMRG administrator.
If you need to perform an upgrade, the updater will prompt you
to apply all updates. Clicking this link will perform all
necessary updates for this release.
If for some reason an update fails, or you would like to
re-apply an update for any reason, you can goto the updater and
goto View all available updates. This will present you a list
of the updates that are available and their status (applied,
not applied, or error). If you have problems updating from one
version to the next, you can force individual updates that fail
so that they're considered 'applied'. Once all updates are
applied for a particular version, the database will be
automatically updated to the latest version that has all
updates applied.
III. Reference
Table of Contents
I. Manual Pages
I. Manual Pages
Table of Contents
netmrg-gatherer -- Gathers data from devices.
netmrg-gatherer
Name
netmrg-gatherer -- Gathers data from devices.
Synopsis
netmrg-gatherer [OPTIONS]
Description
netmrg-gatherer performs tests on all enabled hosts in NetMRG.
It will store results in RRD files using RRDTOOL(1) and perform
actions in response to events.
Global Options
-h
Displays usage information and exits.
-v
Displays software version and exits.
Operating Options
-t num threads
Run no more than the specified number of threads
simultaneously.
-X
Become a daemon.
-M mode
Mode of operation. This option controls the manner in
which the gatherer operates. The modes currently
supported are "once" (the default, best used manually or
via cron) which runs all tests once then exits, and
"wait" (best used when daemonized) which will run all
tests, wait for the gatherer interval to expire, and
then repeat.
Note: To run netmrg-gatherer daemonized, the recommended set
of options at this point is "-X -S -M wait" which will
daemonize, repeat the gather cycle on each interval, and
write output to syslog.
Logging, Debugging and Verbosity Options
-S
Syslog. Logs messages to syslog instead of stdout.
-b
Bland. Disables color output. By default,
netmrg-gatherer will display color output when connected
to a terminal, but will use bland output when its output
is written to a file. This option should only be needed
when the detection mechanism has failed, or the user
doesn't want to see colors when running the program by
hand.
-a
All. Displays all log messages.
-m
Most. Displays more messages than default.
-q
Quiet. Silences all output.
-l level mask
Only outputs messages that match the specified level
mask.
-c component mask
Only outputs messages that match the specified component
mask.
-s
Safe. Tries to keep sensitive information out of the
displayed messages.
Configuration File Options
-C config file
Uses the specified XML configuration file.
-K config file
Parses the specified XML configuration file and exits.
Database Options
-H host
Uses the specified host name for connecting to the
database.
-D database
Uses the specified database name.
-u user name
Uses the specified user name for connecting to the
database.
-p [password]
Uses the specified password for connecting to the
database. If no password is specified, the user is
prompted to enter one.
Recaching Options
-i device id
Performs an interface recache on the specified device.
-d device id
Performs a disk recache on the specified device.
Note: Recaching options are intended for use by the web
interface. These options should not be generally used by end
users.
__________________________________________________________
Chapter 7. Contact Information
We have great aspirations for what NetMRG could become, but as
with all open-source software, such aspriations can only be
achieved with the active participation of the open-source
community. Please do your part and support software that you
use by helping to answer support questions on forums and report
bugs to developers. Thanks!
* Main Website - http://www.netmrg.net/
* Online Docs- http://wiki.netmrg.net/
* Support Forum - http://lists.netmrg.net/
* Bug Reporting and Tracking - http://bugs.netmrg.net/
__________________________________________________________
Appendix A. GNU General Public License
Preamble
The licenses for most software are designed to take away your
freedom to share and change it. By contrast, the GNU General
Public License is intended to guarantee your freedom to share
and change free software - to make sure the software is free
for all its users. This General Public License applies to most
of the Free Software Foundationʼs software and to any other
program whose authors commit to using it. (Some other Free
Software Foundation software is covered by the GNU Library
General Public License instead.) You can apply it to your
programs, too.
When we speak of free software, we are referring to freedom,
not price. Our General Public Licenses are designed to make
sure that you have the freedom to distribute copies of free
software (and charge for this service if you wish), that you
receive source code or can get it if you want it, that you can
change the software or use pieces of it in new free programs;
and that you know you can do these things.
To protect your rights, we need to make restrictions that
forbid anyone to deny you these rights or to ask you to
surrender the rights. These restrictions translate to certain
responsibilities for you if you distribute copies of the
software, or if you modify it.
For example, if you distribute copies of such a program,
whether gratis or for a fee, you must give the recipients all
the rights that you have. You must make sure that they, too,
receive or can get the source code. And you must show them
these terms so they know their rights.
We protect your rights with two steps:
1. copyright the software, and
2. offer you this license which gives you legal permission to
copy, distribute and/or modify the software.
Also, for each authorʼs protection and ours, we want to make
certain that everyone understands that there is no warranty for
this free software. If the software is modified by someone else
and passed on, we want its recipients to know that what they
have is not the original, so that any problems introduced by
others will not reflect on the original authorsʼ reputations.
Finally, any free program is threatened constantly by software
patents. We wish to avoid the danger that redistributors of a
free program will individually obtain patent licenses, in
effect making the program proprietary. To prevent this, we have
made it clear that any patent must be licensed for everyoneʼs
free use or not licensed at all.
The precise terms and conditions for copying, distribution and
modification follow.
__________________________________________________________
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
Section 0
This License applies to any program or other work which
contains a notice placed by the copyright holder saying it may
be distributed under the terms of this General Public License.
The "Program", below, refers to any such program or work, and a
"work based on the Program" means either the Program or any
derivative work under copyright law: that is to say, a work
containing the Program or a portion of it, either verbatim or
with modifications and/or translated into another language.
(Hereinafter, translation is included without limitation in the
term "modification".) Each licensee is addressed as "you".
Activities other than copying, distribution and modification
are not covered by this License; they are outside its scope.
The act of running the Program is not restricted, and the
output from the Program is covered only if its contents
constitute a work based on the Program (independent of having
been made by running the Program). Whether that is true depends
on what the Program does.
__________________________________________________________
Section 1
You may copy and distribute verbatim copies of the Programʼs
source code as you receive it, in any medium, provided that you
conspicuously and appropriately publish on each copy an
appropriate copyright notice and disclaimer of warranty; keep
intact all the notices that refer to this License and to the
absence of any warranty; and give any other recipients of the
Program a copy of this License along with the Program.
You may charge a fee for the physical act of transferring a
copy, and you may at your option offer warranty protection in
exchange for a fee.
__________________________________________________________
Section 2
You may modify your copy or copies of the Program or any
portion of it, thus forming a work based on the Program, and
copy and distribute such modifications or work under the terms
of Section 1 above, provided that you also meet all of these
conditions:
a. You must cause the modified files to carry prominent
notices stating that you changed the files and the date of
any change.
b. You must cause any work that you distribute or publish,
that in whole or in part contains or is derived from the
Program or any part thereof, to be licensed as a whole at
no charge to all third parties under the terms of this
License.
c. If the modified program normally reads commands
interactively when run, you must cause it, when started
running for such interactive use in the most ordinary way,
to print or display an announcement including an
appropriate copyright notice and a notice that there is no
warranty (or else, saying that you provide a warranty) and
that users may redistribute the program under these
conditions, and telling the user how to view a copy of this
License. (Exception: If the Program itself is interactive
but does not normally print such an announcement, your work
based on the Program is not required to print an
announcement.)
These requirements apply to the modified work as a whole. If
identifiable sections of that work are not derived from the
Program, and can be reasonably considered independent and
separate works in themselves, then this License, and its terms,
do not apply to those sections when you distribute them as
separate works. But when you distribute the same sections as
part of a whole which is a work based on the Program, the
distribution of the whole must be on the terms of this License,
whose permissions for other licensees extend to the entire
whole, and thus to each and every part regardless of who wrote
it.
Thus, it is not the intent of this section to claim rights or
contest your rights to work written entirely by you; rather,
the intent is to exercise the right to control the distribution
of derivative or collective works based on the Program.
In addition, mere aggregation of another work not based on the
Program with the Program (or with a work based on the Program)
on a volume of a storage or distribution medium does not bring
the other work under the scope of this License.
__________________________________________________________
Section 3
You may copy and distribute the Program (or a work based on it,
under Section 2 in object code or executable form under the
terms of Sections 1 and 2 above provided that you also do one
of the following:
a. Accompany it with the complete corresponding
machine-readable source code, which must be distributed
under the terms of Sections 1 and 2 above on a medium
customarily used for software interchange; or,
b. Accompany it with a written offer, valid for at least three
years, to give any third party, for a charge no more than
your cost of physically performing source distribution, a
complete machine-readable copy of the corresponding source
code, to be distributed under the terms of Sections 1 and 2
above on a medium customarily used for software
interchange; or,
c. Accompany it with the information you received as to the
offer to distribute corresponding source code. (This
alternative is allowed only for noncommercial distribution
and only if you received the program in object code or
executable form with such an offer, in accord with
Subsection b above.)
The source code for a work means the preferred form of the work
for making modifications to it. For an executable work,
complete source code means all the source code for all modules
it contains, plus any associated interface definition files,
plus the scripts used to control compilation and installation
of the executable. However, as a special exception, the source
code distributed need not include anything that is normally
distributed (in either source or binary form) with the major
components (compiler, kernel, and so on) of the operating
system on which the executable runs, unless that component
itself accompanies the executable.
If distribution of executable or object code is made by
offering access to copy from a designated place, then offering
equivalent access to copy the source code from the same place
counts as distribution of the source code, even though third
parties are not compelled to copy the source along with the
object code.
__________________________________________________________
Section 4
You may not copy, modify, sublicense, or distribute the Program
except as expressly provided under this License. Any attempt
otherwise to copy, modify, sublicense or distribute the Program
is void, and will automatically terminate your rights under
this License. However, parties who have received copies, or
rights, from you under this License will not have their
licenses terminated so long as such parties remain in full
compliance.
__________________________________________________________
Section 5
You are not required to accept this License, since you have not
signed it. However, nothing else grants you permission to
modify or distribute the Program or its derivative works. These
actions are prohibited by law if you do not accept this
License. Therefore, by modifying or distributing the Program
(or any work based on the Program), you indicate your
acceptance of this License to do so, and all its terms and
conditions for copying, distributing or modifying the Program
or works based on it.
__________________________________________________________
Section 6
Each time you redistribute the Program (or any work based on
the Program), the recipient automatically receives a license
from the original licensor to copy, distribute or modify the
Program subject to these terms and conditions. You may not
impose any further restrictions on the recipientsʼ exercise of
the rights granted herein. You are not responsible for
enforcing compliance by third parties to this License.
__________________________________________________________
Section 7
If, as a consequence of a court judgment or allegation of
patent infringement or for any other reason (not limited to
patent issues), conditions are imposed on you (whether by court
order, agreement or otherwise) that contradict the conditions
of this License, they do not excuse you from the conditions of
this License. If you cannot distribute so as to satisfy
simultaneously your obligations under this License and any
other pertinent obligations, then as a consequence you may not
distribute the Program at all. For example, if a patent license
would not permit royalty-free redistribution of the Program by
all those who receive copies directly or indirectly through
you, then the only way you could satisfy both it and this
License would be to refrain entirely from distribution of the
Program.
If any portion of this section is held invalid or unenforceable
under any particular circumstance, the balance of the section
is intended to apply and the section as a whole is intended to
apply in other circumstances.
It is not the purpose of this section to induce you to infringe
any patents or other property right claims or to contest
validity of any such claims; this section has the sole purpose
of protecting the integrity of the free software distribution
system, which is implemented by public license practices. Many
people have made generous contributions to the wide range of
software distributed through that system in reliance on
consistent application of that system; it is up to the
author/donor to decide if he or she is willing to distribute
software through any other system and a licensee cannot impose
that choice.
This section is intended to make thoroughly clear what is
believed to be a consequence of the rest of this License.
__________________________________________________________
Section 8
If the distribution and/or use of the Program is restricted in
certain countries either by patents or by copyrighted
interfaces, the original copyright holder who places the
Program under this License may add an explicit geographical
distribution limitation excluding those countries, so that
distribution is permitted only in or among countries not thus
excluded. In such case, this License incorporates the
limitation as if written in the body of this License.
__________________________________________________________
Section 9
The Free Software Foundation may publish revised and/or new
versions of the General Public License from time to time. Such
new versions will be similar in spirit to the present version,
but may differ in detail to address new problems or concerns.
Each version is given a distinguishing version number. If the
Program specifies a version number of this License which
applies to it and "any later version", you have the option of
following the terms and conditions either of that version or of
any later version published by the Free Software Foundation. If
the Program does not specify a version number of this License,
you may choose any version ever published by the Free Software
Foundation.
__________________________________________________________
Section 10
If you wish to incorporate parts of the Program into other free
programs whose distribution conditions are different, write to
the author to ask for permission. For software which is
copyrighted by the Free Software Foundation, write to the Free
Software Foundation; we sometimes make exceptions for this. Our
decision will be guided by the two goals of preserving the free
status of all derivatives of our free software and of promoting
the sharing and reuse of software generally.
__________________________________________________________
NO WARRANTY Section 11
BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO
WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE
LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS"
WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE
ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS
WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE
COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
__________________________________________________________
Section 12
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY
MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE
LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL,
INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR
INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS
OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED
BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE
WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY
HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
END OF TERMS AND CONDITIONS
__________________________________________________________
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the
greatest possible use to the public, the best way to achieve
this is to make it free software which everyone can
redistribute and change under these terms.
To do so, attach the following notices to the program. It is
safest to attach them to the start of each source file to most
effectively convey the exclusion of warranty; and each file
should have at least the "copyright" line and a pointer to
where the full notice is found.
<one line to give the programʼs name and a brief idea of what
it does.> Copyright (C) <year> <name of author>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of
the License, or (at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public
License along with this program; if not, write to the Free
Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301 USA
Also add information on how to contact you by electronic and
paper mail.
If the program is interactive, make it output a short notice
like this when it starts in an interactive mode:
Gnomovision version 69, Copyright (C) year name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type
"show w". This is free software, and you are welcome to
redistribute it under certain conditions; type "show c" for
details.
The hypothetical commands "show w" and "show c" should show the
appropriate parts of the General Public License. Of course, the
commands you use may be called something other than "show w"
and "show c"; they could even be mouse-clicks or menu
items--whatever suits your program.
You should also get your employer (if you work as a programmer)
or your school, if any, to sign a "copyright disclaimer" for
the program, if necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the
program "Gnomovision" (which makes passes at compilers) written
by James Hacker.
<signature of Ty Coon>, 1 April 1989 Ty Coon, President of Vice
This General Public License does not permit incorporating your
program into proprietary programs. If your program is a
subroutine library, you may consider it more useful to permit
linking proprietary applications with the library. If this is
what you want to do, use the GNU Library General Public License
instead of this License.