From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265859AbTL3R1n (ORCPT ); Tue, 30 Dec 2003 12:27:43 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265867AbTL3R1n (ORCPT ); Tue, 30 Dec 2003 12:27:43 -0500 Received: from amber.ccs.neu.edu ([129.10.116.51]:7335 "EHLO amber.ccs.neu.edu") by vger.kernel.org with ESMTP id S265859AbTL3R1j (ORCPT ); Tue, 30 Dec 2003 12:27:39 -0500 Subject: Re: SCO's infringing files list From: Stan Bubrouski To: "linux-kernel@vger.kernel.org" In-Reply-To: <200312301517.27857.bruno@clisp.org> References: <200312301517.27857.bruno@clisp.org> Content-Type: text/plain Message-Id: <1072805257.1760.13.camel@duergar> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.5 (1.4.5-7) Date: Tue, 30 Dec 2003 12:27:38 -0500 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Bruno, Nice work! How many more files left unexplained? -sb On Tue, 2003-12-30 at 09:17, Bruno Haible wrote: > Here's some info about include/linux/ipc.h, also in SCO's list. > > * lxr.linux.no shows that since version 1.0.9, it had only small incremental > changes. > > The earliest copy of this file that I've got is from Krishna > Balasubramanian's ipcbeta+.tar.Z file. This was his second or third > beta release of SysV IPC for Linux. The file is here: > http://www.haible.de/bruno/ipcbeta+.tar.Z > > * The include/linux/ipc.h from ipcbeta+.tar.Z is the same as the one in > linux-1.0.9 (http://lxr.linux.no/source/include/linux/ipc.h?v=1.0.9) > > I claim that Krishna Balasubramanian wrote this file. > > * The ipcbeta+.tar.Z contents shows how he developed this thing: > He looked at various documentation sources (books, manual pages - remember > POSIX didn't specify IPC at that time -). > He collected some examples like the "dining philosophers" that were floating > around on the net. > We ran some test programs on other Unices (SunOS 4, possibly also HP-UX). > He wrote 40 KB of documentation, explaining each and every system call. > ... and someone who puts so much work in testing and documentation should > steal the header file??! > > * The value of IPC_PRIVATE is different in Linux. SysV systems define it as > (key_t)0, Linux defines it as ((key_t) 0), which extra parentheses. > > * The members of 'struct ipc_perm' are in different order on Linux. > SysV systems have them in the order > uid, gid, cuid, cgid, mode, seq, key. > Linux has them in the order > key, uid, gid, cuid, cgid, mode, seq. > > * The values for IPC_CREAT, IPC_EXCL, IPC_NOWAIT are written as octal numbers, > which is quite natural, since 9 bits having the same rwxrwxrwx semantics as > file permissions can be ORed into it. SysV systems write these constants > with 7 octal digits. Linux ipc.h writes them with 8 octal digits. > > * The values of IPC_RMID, IPC_SET, IPC_STAT are different: on Solaris > 10, 11, 12; on Linux 0, 1, 2. > > * 'struct ipc_kludge' and the corresponding #defines for SEMOP, SEMGET etc. > don't exist in SysV systems. They arose only because we wanted to minimize > the number of system calls. > > I hope that's enough evidence that Krishna didn't copy the file's contents > from anywhere. > > Bruno > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >