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FAU 屏幕与 GNU 屏幕

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FAU 屏幕与 GNU 屏幕

我正在使用以下版本的 Screen 命令：-

屏幕版本 4.00.03 (FAU) 2006 年 10 月 23 日

我想知道与 Screen 命令关联的 GPL 版本（GPLv2 或 GPLv3）。我可以从哪里找到任何帮助吗？

答案1

我的 Fedora 14 机器上有相同的版本。 man screen包含一个COPYLEFT部分，其中指出：

   Copyright (C) 1993-2003
        Juergen Weigert ([email protected])
        Michael Schroeder ([email protected])
   Copyright (C) 1987 Oliver Laumann
   This program is free software; you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published  by  the
   Free  Software  Foundation;  either  version 2, or (at your option) any
   later version.
   This program is distributed in the hope that it  will  be  useful,  but
   WITHOUT  ANY  WARRANTY;  without  even  the  implied  warranty  of MER‐
   CHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU  General
   Public License for more details.
   You should have received a copy of the GNU General Public License along
   with this program (see the file COPYING); if not,  write  to  the  Free
   Software  Foundation,  Inc.,  59  Temple  Place - Suite 330, Boston, MA
   02111-1307, USA

这就是 GPLv2，或者如果您愿意的话可以稍后。

/usr/share/doc/screen-4.0.3/COPYING您还可以找到确认是版本 2 的许可证。

答案2

FAU 屏幕与 GNU 屏幕

“Screen (FAU)”似乎是 Apple OS X / macOS 版本的 screen。

谷歌

谷歌似乎也不知道 fau screen 来自哪里：

https://www.google.com/search?q=%22Screen+version+4.00.03+(FAU)+23-Oct-06%22

莱斯文件系统

既没有locate screen-4.0.3产生locate '/screen/'任何有趣的结果。

strings /usr/bin/screen确实显示了上面显示的相同许可证：

Copyright (c) 1993-2002 Juergen Weigert, Michael Schroeder
Copyright (c) 1987 Oliver Laumann
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program (see the file COPYING); if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
Send bugreports, fixes, enhancements, t-shirts, money, beer & pizza to [email protected]

然而，这个版本的 screen 的行为似乎不像“真实”的 screen（例如，它不能与 ssh 一起使用），所以我的猜测是它是一个分叉。

苹果开源

苹果发布了这个（潜在的）分叉的源代码：

https://opensource.apple.com/source/screen/screen-22/

还有一个变更日志：

https://opensource.apple.com/source/screen/screen-22/screen/patchlevel.h.auto.html

但是，如果您仔细阅读了 OS X 开源的各个版本（https://opensource.apple.com/）您可以找到可能不同版本的 FAU 屏幕（例如https://opensource.apple.com/source/screen/screen-19/screen/）具有完全相同的版本输出。

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