The original Thompson shell was principally written by Ken Thompson of Bell Labs. However, it should be noted that other individuals at Bell Labs also had a role in its development: Dennis Ritchie, M. D. McIlroy, J. F. Ossanna, and quite likely others as well. Jeffrey Allen Neitzel is the principal developer and maintainer of the enhanced, backward-compatible port of the Sixth Edition (V6) UNIX Thompson shell (and all other software) released as part of the osh project. Notice that I have developed two different implementations of osh(1) since July 2003. The origin of each one is described below. ================================ [osh-030730 through osh-060124]: The first implementation was originally authored by Gunnar Ritter as osh-020214/osh.c and was then adopted by Jeffrey Allen Neitzel. Unfortunately, the design of Gunnar's implementation was broken. Thus, it required a lot of workarounds in order to fix the fact that his design resulted in a shell which was incompatible with the Thompson shell in several respects. I modified Gunnar's design to separate command-line parsing and execution so that the shell could at least be compatible in the most basic sense. The only catch was that word splitting was still incompatible. Thus, this partial solution was always destined for eventual replacement. === ================================= [osh-20061230 through osh-trunk]: The second implementation was originally authored by Ken Thompson as Sixth Edition UNIX /usr/source/s2/sh.c and was then ported by Jeffrey Allen Neitzel for personal use in January 2004. I eventually released it as sh6(1) in osh-060124. Then, after its release, I realized that the design of the original shell (see: osh-060124/*6.c) offered a far better starting point for making osh(1) truly backward-compatible with the Thompson shell. Bothered by the fact that osh(1) still had incompatible word-splitting behavior, I abandoned the design used in the first implementation, adapted sh6.c and glob6.c, copied them to osh.c, and began working on it during my free time in 2006. Finally, I released the new implementation of osh(1) in osh-20061230. === I wish to thank the original authors very much for their efforts. Without their previous work, none of this software or documentation would exist today. Jeffrey Allen Neitzel 2008/12/09 @(#)$Id: AUTHORS 576 2008-12-09 02:24:04Z jneitzel $