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Re: `printf -v foo ""` does not set foo=
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From: |
Chet Ramey |
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Subject: |
Re: `printf -v foo ""` does not set foo= |
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Date: |
Mon, 24 Jun 2013 16:13:01 -0400 |
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User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:17.0) Gecko/20130509 Thunderbird/17.0.6 |
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On 6/17/13 1:27 AM, Mike Frysinger wrote:
> simple test code:
> unset foo
> printf -v foo ""
> echo ${foo+set}
>
> that does not display "set". seems to have been this way since the feature
> was added in bash-3.1.
printf returns immediately if the format string is null. It has always
been implemented this way.
Chet
- --
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU chet@case.edu http://cnswww.cns.cwru.edu/~chet/
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