Hi Eric,
I submitted another patch for this issue, and I don't think your patch
is quite right:
* Eric Blake wrote on Wed, Jul 21, 2010 at 06:14:45AM CEST:
> --- a/doc/autoconf.texi
> +++ b/doc/autoconf.texi
> @@ -15006,7 +15006,7 @@ File Descriptors
> Within the process which runs the @samp{descrips} script, file
> descriptor 5 is closed.
>
> -Don't rely on redirection to a closed file descriptor to cause an
> +Don't rely on duplicating a closed file descriptor to cause an
> error. With Solaris @command{/bin/sh}, when the redirection fails, the
> output goes to the original file descriptor.
>
> @@ -15019,6 +15019,12 @@ File Descriptors
> 0
> @end example
>
> +Fortunately, an attempt to close an already closed file descriptor will
> +portably succeed.
This is not true. ksh93, for example, will happily fail to close a
closed fd. You need to try in non-interactive mode.
Cheers,
Ralf
