question about posixbuiltins

question about posixbuiltins

[Han Pingtian]

Hi,

The manual says:

POSIX_BUILTINS <K> <S>
       When  this option is set the command builtin can be used to exe‐
       cute shell builtin commands.   Parameter  assignments  specified
       before  shell  functions and special builtins are kept after the
       command completes unless the special builtin  is  prefixed  with
       the  command  builtin.   Special  builtins are ., :, break, con‐
       tinue, declare, eval, exit, export,  integer,  local,  readonly,
       return, set, shift, source, times, trap and unset.


But looks like the parameter assignment before "command special-builtin"
is kept even though POSIX_BUILTINS has been set:

% zsh -f
localhost% setopt posixbuiltins
localhost% foo=bar command export a=b
localhost% print $foo
bar
localhost%

Re: question about posixbuiltins

[Bart Schaefer]

[-- Attachment #1: Type: text/plain, Size: 737 bytes --]

[This thread went into my spam folder for some reason.]

On Apr 12, 2015 4:03 PM, "Han Pingtian" <hanpt@linux.vnet.ibm.com> wrote:
>
> POSIX_BUILTINS <K> <S>
>        [...]  Parameter  assignments  specified
>        before  shell  functions and special builtins are kept after the
>        command completes unless the special builtin  is  prefixed  with
>        the  command  builtin.
> [...]
> But looks like the parameter assignment before "command special-builtin"
> is kept even though POSIX_BUILTINS has been set

Indeed I can confirm, it appears this either was never working or has been
broken by some recent change.

The default zsh behavior when posixbuiltins is not set, is to not keep the
assignment; that appears to work.