{ foo=bar; command; } | othercommand; echo $foo == no output?

{ foo=bar; command; } | othercommand; echo $foo == no output?

[Andre Pang]

g'day all,

a mate is maving a problem with the following, and i tried the
behaviour under zsh and it doesn't work either.  is there a
reason why this doesn't work?  and what would be a good
solution?  (i suggested setopt multios; prog x y z > /dev/stdout
> filename)

thanks zsh gurus!


----- Forwarded message from waratah@zip.com.au -----

From: waratah@zip.com.au
To: slug-chat@slug.org.au
Date: Thu, 19 Apr 2001 01:59:54 GMT
Subject: [slug-chat] Script challenge with tee
Envelope-to: andrep@localhost
X-Mailer: Endymion MailMan Standard Edition v3.0.26


I have a problem,  I want to tee and still get the return code:

  prog  x y z | tee
  echo $?

Will always show zero because this is the return code of tee.  I need the 
return value of prog.

{
  prog x y z
  echo $?
} | tee

works but I want to capture the values so that I can exit much later with the 
value of this program.

{
   prog x y z
   RC=$?
}  | tee

  lp ...

exit $RC

RC is does not appear to be available to the script.

Any suggestions?

KenF

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----- End forwarded message -----

-- 
#ozone/algorithm <ozone@algorithm.com.au>          - trust.in.love.to.save

Re: { foo=bar; command; } | othercommand; echo $foo == no output?

[Andrej Borsenkow]

On Thu, 19 Apr 2001, Andre Pang wrote:

> I have a problem,  I want to tee and still get the return code:
>
>   prog  x y z | tee
>   echo $?
>

In recent enough zsh (4.0.1-pre-3 is the latest version) you can use
$pipestatus:

pipestatus <S> <Z>
     An array containing the exit values returned by all commands in the
     last pipeline.

bor@itsrm2:~%> cat /foo/bar | tee
cat: Cannot open /foo/bar: No such file or directory
bor@itsrm2:~%> print $pipestatus
2 0

-andrej