[1]History - Etsh Project (V6Shell)

Description:

   Since it is not possible to appreciate the true nature of Ken
   Thompson's shell without having access to the original source code and
   documentation, this material is provided here under the following
   [2]Caldera license (see LICENSE file) as a historical reference for the
   development of etsh. The following Sixth Edition (V6) UNIX source code
   and documentation was obtained from The UNIX Heritage Society
   ([3]TUHS, see [4]Dennis_v6). According to the [5]details, these
   files were provided to TUHS by Dennis Ritchie.

     * Thompson shell source code - sh.c (installed as /bin/sh)

     * Manuals sources - sh.1, chdir.1, login.1, newgrp.1, shift.1, wait.1

   The shell made use of the following external utilities.

     * The exit.1 command, exit.c (installed as /bin/exit), was used
       to terminate command files.

     * The goto.1 command, goto.c (installed as /bin/goto), was used
       to transfer the shell's control from one point to another
       within a command file.

     * The if.1 command, if.c (installed as /bin/if), was used to
       evaluate conditional expressions. This is the predecessor of
       test(1), which was first released in Seventh Edition UNIX.

     * The glob.8 command, glob.c (installed as /etc/glob), was used
       to expand `*', `?', and `[...]' in command arguments.

References:

 1. https://etsh.io/history/
 2. https://tuhs.v6shell.org/UnixArchiveMirror/Caldera-license.pdf
 3. https://tuhs.v6shell.org/
 4. https://tuhs.v6shell.org/UnixArchiveMirror/Distributions/Research/Dennis_v6/
 5. https://tuhs.v6shell.org/UnixArchiveMirror/Distributions/DETAILS

Jeffrey Allen Neitzel
<jan (at) etsh (dot) io>
https://etsh.io/history/					2018/06/14

@(#)$Id: README,v 1.1 2018/06/14 00:00:00 jneitzel $
