[EMAIL PROTECTED] wrote:
>
>
> >
> >You cannot look at too few claims from POSIX.
> >
> >the definitions for read say that read affects the shell execution
> >environment
> >unless it is run on a sub shell.
> >
> >As in "cat from-file | read value" the read command is not run in a sub shell
> >environment, it needs to affect the environment.
>
>
> You should not have deleted the rest of my email which clearly quotes
> the standard saying:
>
> Additionally, each command of a multi-command pipeline is in a subshell
> environment; as an extension, however, any or all commands in a pipeline
> may be executed in the current environment. All other commands shall be
> executed in the current shell environment.
As the terrm "multi-command pipeline" is not defined, it is questionable what
this text should mean....
If it makes sense to define a "multi-command pipeline" at all, it needs to be
different from a simple pipeline.
"cat from-file | read value" is doubtlessly a simple pipeline ;-)
Jörg
--
EMail:[EMAIL PROTECTED] (home) Jörg Schilling D-13353 Berlin
[EMAIL PROTECTED] (uni)
[EMAIL PROTECTED] (work) Blog: http://schily.blogspot.com/
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