Messages in this thread | | | Subject | Re: SCO's infringing files list | From | Stan Bubrouski <> | Date | Tue, 30 Dec 2003 12:27:38 -0500 |
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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/ >
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