[augeas-devel] path expression question

[Patrick Spinler]

Fantastic, and thank you!  This did indeed do the trick. :-)

insert append before "/files/etc/sysconfig/iptables/table/append[. =
'Mayo-Firewall-INPUT'][1]"

Thank you muchly for your patience with my novice questions. :-)

-- Pat

On 9/30/13 3:31 PM, Raphaël Pinson wrote:
> Hi Pat,
> 
> 
> You need to select the first node matching your expression, by filtering
> a second time:
> 
> insert append before "/files/etc/sysconfig/
> iptables/table/append[position(. =
> 'Mayo-Firewall-INPUT')][1]"
> 
> 
> Regards,
> 
> Raphaël
> 
> 
> 
> On Mon, Sep 30, 2013 at 9:54 PM, Patrick Spinler
> <spinler.patrick at mayo.edu <mailto:spinler.patrick at mayo.edu>> wrote:
> 
> 
>     Okay, so I have a structure like this:
> 
>     augtool> ls "/files/etc/sysconfig/iptables/table/"
>     chain[1]/ = INPUT
>     chain[2]/ = FORWARD
>     chain[3]/ = OUTPUT
>     chain[4]/ = Mayo-Firewall-INPUT
>     append[1]/ = INPUT
>     append[2]/ = INPUT
>     append[3]/ = INPUT
>     append[4]/ = INPUT
>     append[5]/ = INPUT
>     append[6]/ = INPUT
>     append[7]/ = FORWARD
>     append[8]/ = Mayo-Firewall-INPUT
>     append[9]/ = Mayo-Firewall-INPUT
>     append[10]/ = Mayo-Firewall-INPUT
>     (...snip...)
>     append[27]/ = Mayo-Firewall-INPUT
>     append[28]/ = Mayo-Firewall-INPUT
>     append[29]/ = Mayo-Firewall-INPUT
> 
>     I'd like to insert a new node immediately before the first
> 
>       append[. = 'Mayo-Firewall-INPUT']
> 
>     node, that is, in this case, before append[8].  However, that position
>     in the tree, [8], is obviously not constant.
> 
>     How might I do this?
> 
>     I've tried expressions like this:
> 
>     augtool> insert append before
>     "/files/etc/sysconfig/iptables/table/append[. = 'Mayo-Firewall-INPUT']"
>     error: Too many matches for path expression
> 
>     and expressions involving [position(...)], like this
> 
>     augtool> insert append before
>     "/files/etc/sysconfig/iptables/table/append[position(. =
>     'Mayo-Firewall-INPUT')]"
>     error: Invalid path expression
> 
> 
>     which obviously both fail.  Thoughts?
> 
>     Thanks,
>     -- Pat
> 
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> 
> 
> 
> -- 
> Raphaël Pinson
> Infrastructure Developer & Trainer
> +33 479 26 57 93
> +33 781 90 00 79
> 
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