Software Types
There are some specific software types worth mentioning from a licensing/legal perspective.
Shareware applications are not Open Source code, and are not acceptable for Fedora.
However, it is worth noting that some non-executable content exists that is required to make Open Source applications functional. An example of this would be open sourced game engines, such as Doom, Heretic, and Descent. These game engines come with freely distributable shareware gamedata files.
In this case, the gamedata files can be packaged and included in Fedora, as long as the files meet the requirements for binary firmware .
Patented Software
If a package contains code covered by known patents, then you should seek a written patent grant (and include that grant inside the package) before submitting it for Fedora. This is especially important for GPL/LGPL licensed packages, because of the following clause (from GPLv2):
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.
It isn't safe to assume that the patent holder permits royalty-free redistribution, you need to get it in writing.
Emulators
Some emulators (applications which emulate another platform) are not permitted for inclusion in Fedora. These rules will help you determine if an emulator is acceptable for Fedora.
- Emulators which depend on firmware or ROM files to function may not be included in Fedora, unless the copyright holder(s) for the firmware/ROM files give clear permission for the firmware/ROM files to be distributed (either under a Fedora permissible license or under the Fedora firmware exception criteria). Note: This only covers the situation where an emulator will not run at all without firmware/ROM files. For example, emulators that compile and run, but ship with no game ROMs are not covered by this rule.
- Emulators must not ship with any ROM files (e.g. games) unless those ROM files are available under a Fedora permissible license and have been built from source code in the Fedora buildsystem.
- Emulators must not point to any third-party sites which provide firmware or ROM files that are distributed without the clear and explicit permission of their copyright holders.
- All other Fedora licensing and packaging rules apply to emulators.
QEMU ROMs
Whenever possible, ROMS implementing BIOS or Firmware for QEMU system targets must be built from source on the intended architecture. However, in many situations, this is not practical or possible. As a special exception for those situations where it is not practical or possible, prebuilt binary ROMS implementing BIOS or Firmware for QEMU system targets may be included in Fedora Packages, as long as the corresponding source code is also included in the Source RPM package.
Binary Firmware
Some applications, drivers, and hardware require binary-only firmware to boot Fedora or function properly. Fedora permits inclusion of these files as long as they meet the following requirements:
Requirements:
- The files are non-executable within the Fedora OS context (note: this means that the files cannot run on their own, not that they are just chmod -x)
- The files are not libraries, within the Fedora OS context.
- The files are standalone, not embedded in executable or library code (within the Fedora OS context).
- The files must be necessary for the functionality of open source code being included in Fedora OR to enable Fedora to boot on a specific device, where no other reliable and supported mechanisms exist.
- The files are available under an acceptable firmware license, which is included with the files in the packaging.
The Fedora Project considers a firmware license acceptable if:
- it allows some form of royalty-free use, subject to restrictions that the Fedora Project has determined are acceptable for firmware licenses (see below), and
- it does not restrict redistribution in ways that would make a software license unacceptable under Fedora licensing guidelines, except by:
- requiring that the firmware be redistributed only as incorporated in the redistributor's product (or as a maintenance update for existing end users of the redistributor's product), possibly limited further to those products of the redistributor that support or contain the hardware associated with the licensed firmware; and
- requiring the redistributor to pass on or impose conditions on users that are no more restrictive than those authorized by this Fedora firmware licensing policy.
A non-exhaustive list of restrictions on use that Fedora considers acceptable for firmware licenses are:
- any restrictions that are found in software licenses that are acceptable for Fedora;
- prohibitions on modification;
- prohibitions on reverse engineering, disassembly or decompilation;
- restricting use to use in conjunction with the hardware associated with the firmware license.
If you are unsure whether or not your files meet these requirements, ask on fedora-devel-list, and we will examine them for you.
The License tag for any firmware that disallows modification must be set to: "Redistributable, no modification permitted"
Firmware packages must be named <foo>-firmware, where <foo> is the driver or other hardware component that the firmware is for. In cases of firmware used to boot Fedora on a device, <foo> must be the type of device(s) that the firmware is intended for (e.g. raspberrypi).