Hi Gerrit,
> The only concern I have with this change is the handling of $PPID
>
> $ cat /tmp/t
> echo $PPID
> $ sh -c /tmp/t
> 17254
> $ sh -c 'exec /tmp/t'
> 13318
> $
>
> Would this be a regression and, if yes, an acceptable one?
It's a noticeable behavior change and so it should be documented in
the changelog, I agree.
I think the change would be acceptable. Many other shells (e.g.,
ksh93, bash) follow the same rule so it doesn't hurt script
portability. POSIX clearly allows it: when XCU 2.12 says
Utilites other than the special built-ins [...]
shall be invoked in a separate environment that consists of
the following.
it is very careful to not include the process ID as part of the
definition. Natural enough. Typically non-special builtins like "cd"
are run in the same process, even while they get their own set of
variables, cwd, redirections, and so on.
Regards,
Jonathan
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