Re: Some minor notes on manual chapter 4 "Shell Builtin Commands"

[Kerin Millar]

On Mon, 9 Oct 2023 14:56:24 -0400
Chet Ramey <chet.ramey@case.edu> wrote:

> On 10/9/23 1:57 AM, Kerin Millar wrote:
> 
> > Just to add that, while POSIX does not specify the behaviour of the exit 
> > builtin where its operand "is not an unsigned decimal integer or is greater 
> > than 255", it does forbid all special built-in utilities (including exit) 
> > from causing an interactive shell to exit on account of an error. 
> 
> Again, it's a mixed bag. The ash-derived shells and mksh exit, others

Very mixed indeed.

> (bash, yash) do not. I can see not exiting if the interactive shell is
> in posix mode.

I don't mean to nitpick over a minor issue but bash does also report that a 
numeric argument is "required", implying (at least, to my mind) that the 
built-in requires a valid argument to be able to act at all. Should bash remain 
able to exit in the interactive context, it might make sense to avoid that 
particular word.

-- 
Kerin Millar