On 26/02/17 09:19 AM, Bart Schaefer wrote:
Most interesting. An insight like that will explain much. I presumed bash to be no more than the natural evolution of sh and zsh to be more or less the same, with no particular nod to csh. I know that ksh was a truly separate project. Is there a brief history of shells that one might read? Anyway, I always took differences between zsh and bash to be 'deliberate' if that's the right word -- gorillas making a very definite point of not being orange. Thus my original question and now I see what you were getting at as far as gorillas.The goals were not at all similar. Bash was an effort to re-create the Bourne shell under the GPL; zsh was an effort to introduce structured shell language and scripting to csh users.