On 4/24/19 9:07 AM, Andreas Schwab wrote:
>> The /bin/true forces the use of an external command, which means a subshell
>> is forked. The redirection occurs in the forked subshell.
>
> But the expansion isn't required to be performed in the subshell. I
> don't see POSIX having any wording to require one or the other.
I think the POSIX wording is carefully crafted to allow all behaviors.
> Doing
> the expansion before the fork looks reasonable, even if only to make it
> consistent with builtins.
Is that consistency more valuable than avoiding side effects?
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU [email protected] http://tiswww.cwru.edu/~chet/
