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Re: Stumped on a question of scoping and unset.
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From: |
Freddy Vulto |
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Subject: |
Re: Stumped on a question of scoping and unset. |
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Date: |
Thu, 26 May 2011 16:50:09 +0200 |
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User-agent: |
Mutt/1.5.20 (2009-06-14) |
On 09:11, Steven W. Orr wrote:
> typeset $1 && upvars -a$nn $1 "address@hidden"
>
> The implication seems to be that the typeset command can fail. Is
> this a reasonable thing to worry about?
The idea is that a typeset - besides declaring a variable local -
protects upvars from malicious variable names:
$ typeset 'ls -l'
bash: typeset: `ls -l': not a valid identifier
$ echo $?
1
Freddy Vulto
http://fvue.nl