A superficially modest blog post from a senior Hatter announces that going forward, the company will only publish the source code of its CentOS Stream product to the world. In other words, only paying customers will be able to obtain the source code to Red Hat Enterprise Linux… And under the terms of their contracts with the Hat, that means that they can’t publish it.
I was confused they didn’t think of this either, but the language in the license is very clear. I see no way it cannot be infringing - the only way you can be restricted from redistributing GPLv3’d source is if you publish it incorrectly. If you override these rights in any way, you lose your license to distribute the GPLed software and it turns into piracy.
That’s ignoring the variety of other OSS licenses used for software in their repositories, many of which have similar (or even broader) redistribution rights.
Relevant GPLv3 language:
Section 4. Conveying Verbatim Copies. "You may convey verbatim copies of the Program's source code as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice; keep intact all notices stating that this License and any non-permissive terms added in accord with section 7 apply to the code; keep intact all notices of the absence of any warranty; and give all recipients a copy of this License along with the Program." Section 5. Conveying Modified Source Versions. "You may convey a work based on the Program, or the modifications to produce it from the Program, in the form of source code under the terms of section 4, provided that you also meet all of these conditions: a) The work must carry prominent notices stating that you modified it, and giving a relevant date. b) The work must carry prominent notices stating that it is released under this License and any conditions added under section 7. This requirement modifies the requirement in section 4 to “keep intact all notices”. c) You must license the entire work, as a whole, under this License to anyone who comes into possession of a copy. This License will therefore apply, along with any applicable section 7 additional terms, to the whole of the work, and all its parts, regardless of how they are packaged. This License gives no permission to license the work in any other way, but it does not invalidate such permission if you have separately received it. d) If the work has interactive user interfaces, each must display Appropriate Legal Notices; however, if the Program has interactive interfaces that do not display Appropriate Legal Notices, your work need not make them do so."Another excerpt from the GPLv3 that explicitly describes and disallows what Red Hat is doing - you are explicitly not allowed to add any restrictions when you redistribute GPLv3 licensed software:
If the Program as you received it, or any part of it, contains a notice stating that it is governed by this License along with a term that is a further restriction, you may remove that term.…aaand an additional excerpt which disallows Red Hat’s restrictions:
Each time you convey a covered work, the recipient automatically receives a license from the original licensors, to run, modify and propagate that work, subject to this License.(note: “original licensors” is not Red Hat regarding any software other than their own. Red Hat cannot change or infringe upon rights received from upstream.) and ANOTHER excerpt:
If you distribute copies of such a program, whether gratis or for a fee, you must pass on to the recipients the same freedoms that you received. You must make sure that they, too, receive or can get the source code.What if they technically allow redistribution, but terminate access to recieving updates for doing so? So you can distribute a copy of version N, but if you do so you will not recieve version N+1, and therefore will not be able to get source code for version N+1. Not sure if this is how it is in their contract though.
It could be argued that is also a restriction disallowed by the GPL (in my mind any terms that bring negative consequences for expressing your rights given by the license are restrictions), but at that point it’s really beyond my expertise on this subject. I’m not sure if the GPLv3 even defines this at all - maybe Red Hat is banking on that ambiguity.
They might also be banking on GPLv3 contributors being unable/unwilling to take them to court. The Linux kernel is GPLv2, and its contributors are probably more of a legal threat than anything else in RHEL.