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Re: nofork command substitution


From: Chet Ramey
Subject: Re: nofork command substitution
Date: Mon, 15 May 2023 14:51:06 -0400
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:102.0) Gecko/20100101 Thunderbird/102.11.0

On 5/15/23 2:42 PM, Oğuz İsmail Uysal wrote:
On 5/15/23 8:35 PM, Chet Ramey wrote:
Please test it out

     $ cat
     ^Z
     [1]+  Stopped                 cat
     $ x=${ fg;}
     foo
     foo
     <^C or ^D here>
     $ declare -p x
     declare -- x="cat"
     $

Is this intended?

So far, yes. Everything is shared between the comsub and its caller, with a
couple of documented exceptions. So it's just like calling `fg' in the
current execution environment, but capturing the output.

--
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    chet@case.edu    http://tiswww.cwru.edu/~chet/




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