Re: Closing File Descriptors

[Davy Durham]

> If you want to close fd 3 you need to use `exec 3<&-'.  That makes the
> redirections persist in the current shell environment.
>
>  

Very much thank you.. I would have never guess that...

Is this in the man page somewhere? (Perhaps is implicit)

I see that in the description for exec that if no command is specified 
then redirections will take place in the current shell, but that doesn't 
imply that you have to use exec to make them persist (unless the "3>&-" 
by itself is seen as a new command to execute and thus a forked process, 
but exec would seem to imply that the current process is about to be 
replaced)..  that's really nasty.  Perhaps something should be mentioned 
in the section on REDIRECTION about this.


Thanks again!

-- Davy