How to turn sh_word_split on for a single command

How to turn sh_word_split on for a single command

[Alain Caron]

In my .zprofile, I have to use a command similar to this one in order
to set-up my environment.

eval `some_command | command_filter`

My problem is that some_command is written for ksh/sh and I do not
have the sh_word_split option set.  This causes the above command to
fail.

It complains with the following error message:
zsh: no such file or directory: /usr/bin/X11/resize -u
which is clearly because of the sh_word_split option unset.

As a work-around, I did the following:

setopt shwordsplit
eval `some_command | command_filter`
unsetopt shwordsplit

which works fine.  The problem with this is that it is not elegant and
can be potentially dangerous if ever change my mind about having
shwordsplit option unset.  I know I could query the original state of
the option and only to this setopt/unsetopt if the option was
originally unset.

By looking at the man page, I thought I could use something like this:

eval ${=$(some_command | command_filter)}

but it fails the same way.

I am using zsh 3.0.2 on a HP 715 with HP-UX 9.05.  Zsh has been
compiled with the native HP cc compiler.

Regards,

Alain Caron
alainc@nortel.ca

Re: How to turn sh_word_split on for a single command

[Andrej Borsenkow]

On 15 Jan 1997, Alain Caron wrote:

> 
> 
> In my .zprofile, I have to use a command similar to this one in order
> to set-up my environment.
> 
> eval `some_command | command_filter`
> 
> My problem is that some_command is written for ksh/sh and I do not
> have the sh_word_split option set.  This causes the above command to
> fail.
> 
> It complains with the following error message:
> zsh: no such file or directory: /usr/bin/X11/resize -u
> which is clearly because of the sh_word_split option unset.
> 

Hmmm ...

% echo $ZSH_VERSION
3.1.0
% unsetopt | grep shwordsplit
shwordsplit
% cat =foo
#!/sbin/zsh
echo 'ls -x'
% eval `foo`
... output of ls -x follows ...

Could you be more specific about your command? E.g.
% CMD='ls -x'
% eval `$CMD`
zsh: command not found: ls -x

greetings

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