According to commit 2f5f89963186d42a7ded253bc6cf5b32abb45cec ("Remove the advertising clause from the slirp license"), Danny Gasparovski gave permission to license slirp code under 3-clause BSD license:
Subject: RE: Slirp license Date: Thu, 8 Jan 2009 10:51:00 +1100 From: "Gasparovski, Daniel" <daniel.gasparov...@ato.gov.au> To: "Richard Fontana" <rfont...@redhat.com> I have no objection to having Slirp code in QEMU be licensed under the 3-clause BSD license. slirp/COPYRIGHT's initial version in 2004 (commit 5fafdf24) listed only 3 clauses BUT used the poisonous advertising clause for clause 3 which is the controversial clause of non-free 4-clause (that is, it appears that the BSD-4 license was copied, and then the WRONG clause was deleted, when creating COPYRIGHT. Perhaps explained as an easy mistake to make since 3-clause was created by removing clause 3 of the 4-clause, where you sometimes see the three-clause version with clauses 1, 2, 4; but more commonly see a renumbered version with clauses 1, 2, 3 to close the gap. If you pay attention only to clause numbers instead of content, it can be easy to confuse which clause to delete to go from 4-clause to 3-clause). Commit 2f5f89963 removed the poisonous wrong clause on the grounds of moving from 4-clause to 3-clause; but did not add the missing clause, which makes it LOOK like the 2-clause version. But I think we have a decent enough trail showing the intent for 3-clause. Signed-off-by: Marc-André Lureau <marcandre.lur...@redhat.com> Reviewed-by: Eric Blake <ebl...@redhat.com> Reviewed-by: Thomas Huth <th...@redhat.com> --- slirp/COPYRIGHT | 3 +++ 1 file changed, 3 insertions(+) diff --git a/slirp/COPYRIGHT b/slirp/COPYRIGHT index 1bc83d497e..9863ea31cb 100644 --- a/slirp/COPYRIGHT +++ b/slirp/COPYRIGHT @@ -25,6 +25,9 @@ The copyright terms and conditions: 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. + 3. Neither the name of the copyright holder nor the names of its + contributors may be used to endorse or promote products derived + from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY -- 2.21.0.4.g36eb1cb9cf