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DMA Operations Guide Third-Party Software
16 Polycom, Inc.
Third-Party Software
Open Source Software
The Polycom DMA system uses several open source software packages,
including the CentOS operating system. CentOS is an enterprise-class Linux
distribution that contains hundreds of open-source components. For more
information about CentOS, visit http://www.centos.org/.
The packages containing the source code and the licenses for all the open-
source software, including CentOS and its components, are included on the
Polycom DMA system software DVD, mostly in the
/SRPMS
directory.
Modifying Open Source Code
The LGPL v2.1 license allows you to modify the LGPL code we use, recompile
the modified code, and re-link it with our proprietary code. Note that although
you’re free to modify the LGPL modules used in the Polycom DMA system in
any way you wish, we cannot be responsible if the changes you make impair
the system.
To replace an LGPL library with your modified version
1 On the DMA DVD, find the source code for the module you want to
modify.
2 Modify the source code and compile it.
3 Go to Admin > Local Cluster > Security Settings, select Allow Linux
console access, and click Update.
4 Contact Polycom Global Services for the root password for the Polycom
DMA server.
5 Use ssh to log into the server as root.
6 Upload the modified software via wget or scp.
7 Find the module you’re replacing and install the new version to that
location.
8 Reboot the system.
License Information
The following table contains license information for the open source software
packages used in the Polycom DMA system. Note that the source code and the
licenses for all the open-source software, including CentOS and its
components, are included on the Polycom DMA system software DVD. This
list is provided as a convenient reference.