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Re: $PIPESTATUS is not updated by single external commands


From: Andreas Schwab
Subject: Re: $PIPESTATUS is not updated by single external commands
Date: Sun, 17 Mar 2002 17:08:52 +0100
User-agent: Gnus/5.090005 (Oort Gnus v0.05) Emacs/21.2.50 (ia64-suse-linux)

address@hidden (Paul Jarc) writes:

|> A single-element pipeline containing an external command does not
|> update PIPESTATUS.  Problems like this might be easier to detect if $?
|> were reimplemented as just an alias for ${PIPESTATUS[$#PIPESTATUS]}.
|> They are intended to always have the same value, aren't they?
|> 
|> bash-2.05a$ PS1='$(echo "address@hidden") $ '

Useless Use of Command Substitution:

PS1='address@hidden $ '

|> 0 $ false | false
|> 1 1 $ ls | cat > /dev/null
|> 0 0 $ /bin/false
|> 0 0 $ false | false
|> 1 1 $ ls > /dev/null
|> 1 1 $ true
|> 0 $ 

I cannot reproduce that with the same version on ia64-suse-linux.

Andreas.

-- 
Andreas Schwab, SuSE Labs, address@hidden
SuSE GmbH, Deutschherrnstr. 15-19, D-90429 N├╝rnberg
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