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Re: some more inline assignments / evaluation wrt POSIX
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From: |
Andreas Schwab |
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Subject: |
Re: some more inline assignments / evaluation wrt POSIX |
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Date: |
Sat, 19 May 2007 08:51:03 +0200 |
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User-agent: |
Gnus/5.110006 (No Gnus v0.6) Emacs/22.0.97 (gnu/linux) |
Mike Frysinger <vapier@gentoo.org> writes:
> testing with bash-3.2p17 here ...
>
> looking at these statements:
> K=dvb0.net A=${K#dvb} echo "$A"
> K=dvb0.net A=${K#dvb} ; echo "$A"
> K=dvb0.net A=${K#dvb} eval echo '$A'
>
> shouldnt "0.net" always be displayed ? looks like A is always set properly
> to "0.net", but in the first statement, $A gets expanded before the variable
> assignments are processed
See
<http://www.opengroup.org/onlinepubs/009695399/utilities/xcu_chap02.html#tag_02_09_01>.
The command is expanded before the assignments are evaluated.
Andreas.
--
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
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