Re: POSIX shell specification insight requested
On Tue, Mar 02, 2004 at 12:47:15PM -0600, Manoj Srivastava wrote:
> On Tue, 2 Mar 2004 13:04:43 -0500, Branden Robinson <branden@debian.org> said:
> > Is the following construction POSIXly correct? foo=$(cat <<EOF Foo
> > bar baz quux. EOF)
>
> ======================================================================
> ISO/IEC 9945-2:1993(E) Information Technology -- POSIX
> IEEE Std 1003.2-1993 Part 2: Sheel and utilities
>
> § 3.6.3 Command substitution
>
> ...
>
> lines 474-477
>
> Within the $(command) form, all characters following the open
> parenthesis to the matching closing parenthesis constitute the
> /command/. Any valid shell script can be used for /command/, except
>
> -- A script consisting solely of redirections produces unspecified
> results
> ======================================================================
>
> The here document is a redirection, hence the reults of that
> command substitution are unspecified.
"cat <<EOF" is not "a script consisting solely of redirections". It
contains a redirection, but does not consist solely of one.
Cheers,
--
Colin Watson [cjwatson@flatline.org.uk]
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