From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-0.9 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI autolearn=ham autolearn_force=no version=3.4.4 Received: from minnie.tuhs.org (minnie.tuhs.org [IPv6:2600:3c01:e000:146::1]) by inbox.vuxu.org (Postfix) with ESMTP id 8B61121837 for ; Tue, 5 Nov 2024 14:41:11 +0100 (CET) Received: from minnie.tuhs.org (localhost [IPv6:::1]) by minnie.tuhs.org (Postfix) with ESMTP id 26B0443BBD; Tue, 5 Nov 2024 23:41:05 +1000 (AEST) Received: from mail-ua1-x92a.google.com (mail-ua1-x92a.google.com [IPv6:2607:f8b0:4864:20::92a]) by minnie.tuhs.org (Postfix) with ESMTPS id 36E6543BBC for ; Tue, 5 Nov 2024 23:40:58 +1000 (AEST) Received: by mail-ua1-x92a.google.com with SMTP id a1e0cc1a2514c-84fc21ac668so1595703241.1 for ; Tue, 05 Nov 2024 05:40:58 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=dartmouth.edu; s=google1; t=1730814057; x=1731418857; darn=tuhs.org; h=to:subject:message-id:date:from:mime-version:from:to:cc:subject :date:message-id:reply-to; bh=mWPF4GicTloyP9KOSwH/VqAYV/iFiswp8P0LYfI9qRI=; b=hnAhdEFiDO8KyCWWSL3q2cSEbc9ZC9rgMzjJpgUThxm4FYsW/lsTBvCOd+oUZZgAOO kA3AUPfQ2uOicUzmcpX+Nk0L4TZozKJyow0Bfx4uzubJgOfvoBzwE55Nbq1wOM9YWODZ 3X4vL8tmtd65kQhIrJ5loSI2fxaqvaicFoAq33aYecnAUwwjFxWjybHqV9mxUUz9KbNm YmPrMWasUMtLysm4PXdy+EQrzi8wuuvgHyGIW95P5EQxVAIzQYAx0n8MX686NJrApzdl R4VfyBITjYeGvcUbEnuizUWUXbVZ0rmdz/Gfu65oBK05W1eZUkVsdiLNfoG/rxCCStR6 BMiQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1730814057; x=1731418857; h=to:subject:message-id:date:from:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=mWPF4GicTloyP9KOSwH/VqAYV/iFiswp8P0LYfI9qRI=; b=wiTLlEoOXktNMz0tzLj7ra/Dd6NYpLofa78yXBtF0FSgAFXe6Hh3Q/BdefU7gcaxK5 wOrqH5QNXcmMqJy+AUg/vLcDW5BlLB7MkBBP1B/6FHy8pynQ+KE2UcgAwJb2VbyQ2MKB Bj349mroAfQ8AXNCNrDswfJLjeZ54Em/c09okneFJXd//7AEY5+ZrsByNKQ4PCUaghO7 M0W+bER96O6J2D0SoTUQUH40Wfz0EPnR3b4Z+7Cp1LvQJL4zxQnNL/TgGzfQGxqCO+jc 0l9SfvSAr7JPVhU1m7JyzBRBYAOt8UMgWbsE+rf2qFt5xq8MhZMmKBhUzFekGr9z4kVY XwDg== X-Gm-Message-State: AOJu0YwpoeX+lIuiVrD4EIzgcNAqUgHKThvAbApjC4oAU6Fh0GfVQVGJ puu9xr0yq8jelXxlQykaJoaFdsSC5ocej9DK5z3SXkwGO8gEdpySDW2YSZM620xTDiq/AvrDhle jaNLtYN172K8QqyWT/Ph//lNPMizDzJZSF8nHTuIQCnzxKMmze3o= X-Google-Smtp-Source: AGHT+IGtyUmH0NcMsmpdRZiI7izoNQhGVrKWMZTPOZvJDzIOaiaZCOXXIPBfuUtA/w2MDfJFjO3HJ5WZkSsYJF2twus= X-Received: by 2002:a05:6102:d8c:b0:498:f38a:2c80 with SMTP id ada2fe7eead31-4a8cfb4d1d9mr32884788137.10.1730814057246; Tue, 05 Nov 2024 05:40:57 -0800 (PST) MIME-Version: 1.0 From: Douglas McIlroy Date: Tue, 5 Nov 2024 08:40:44 -0500 Message-ID: To: TUHS main list Content-Type: text/plain; charset="UTF-8" Message-ID-Hash: DXULQEAECRHXFUGUZR3JUT7XFAGG74LB X-Message-ID-Hash: DXULQEAECRHXFUGUZR3JUT7XFAGG74LB X-MailFrom: douglas.mcilroy@dartmouth.edu X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-tuhs.tuhs.org-0; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.6b1 Precedence: list Subject: [TUHS] IBM's involvement (was: SCO's "evidence" (was: RIP Darl McBride former CEO of SCO)) List-Id: The Unix Heritage Society mailing list Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: As a bit-part expert witness for the other side of the SCO case, I saw hundreds of pages of evidence in the form of side-by-side code comparison. As I recall, the vast majority of highlighted correspondences were small snippets, often rearranged. I didn't interact with the lawyers enough to form a solid opinion about where this stood on the spectrum of coincidence to fair use to plagiarism. It certainly wasn't wholesale copying. I do not recall being asked to opine on whether trade secrets had been stolen. Apropos of rearranged snippets, one of the diff algorithms I experimented with in the mid-70s identified rearrangements. I abandoned it because real life code contains lots of similar lines, so many in PDP-11 assembler programs as to suggest that these programs are largely permutations of each other. The phenomenon is much less common in C, but still present; witness the prevalence of code like int i, n; for(i=0; i