Mark Clarkson wrote:
On Wed, 05 Mar 2008 13:10:37 -0800 Bob McGowan <bob_mcgowan@symantec.com> wrote:Mark Clarkson wrote:On Wed, 05 Mar 2008 12:16:02 -0800 Bob McGowan <bob_mcgowan@symantec.com> wrote:Brian wrote:So can you explain exactly what the first < <( echo "$teststring" ) does exactly please?
<<<<Deleted details available elsewhere>>>>
This should explain it: $ exec 4<>4 $ echo "this is a test" >4 $ wc /dev/fd/4 1 4 15 /dev/fd/4 which of course is equivalent to $ wc <(echo this is a test) and is not a redirection! The man page tells me that <(list) substitutes the list and it's up to the user to choose what to do with it. I chose to redirect it, hence the additional '< '.
I think I get it. Following through with this, regarding the error seen with 'read' and the substitution only form: 'bash: read: `/dev/fd/4': not a valid identifier', I did this, based on your setup above:
$ read a b c d /dev/fd/4 1 2 3 4 bash: read: `/dev/fd/4': not a valid identifier $ read a b c d < /dev/fd/4 $ echo $c $d a testWhich is just another way of illustrating that you need to redirect the substitution.
Thanks. -- Bob McGowan
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