Re: /bin/sh question

[Ron McDowell <rcm%fuzzwad.org@localhost>]

On 7/29/12 11:28 AM, Paul Goyette wrote:
> Just out of curiousity, is there a reason why the following does not 
> work?  It generates "Symbol =" as output...
>
>     #! /bin/sh
>
>     echo "value" |
>       read symbol
>     echo "Symbol = $symbol"
>
> Yet it does work if you do it as follows, generating the expected 
> output "Symbol = value"
>
>     #! /bin/sh
>     echo "value" |
>     ( read symbol
>       echo "Symbol = $symbol" )
>
>
>
> -------------------------------------------------------------------------
> | Paul Goyette     | PGP Key fingerprint:     | E-mail addresses:       |
> | Customer Service | FA29 0E3B 35AF E8AE 6651 | paul at whooppee.com    |
> | Network Engineer | 0786 F758 55DE 53BA 7731 | pgoyette at juniper.net |
> | Kernel Developer |                          | pgoyette at netbsd.org  |
> -------------------------------------------------------------------------
I see the first example as:

( echo "value" | read symbol )
echo "Symbol = $symbol

--
Ron McDowell
San Antonio TX