I just did this on a system.
{ /etc/postfix/main.cf
# Edit the lines if they are there (required patch 2.1.14 )
ReplaceAll "^mydomain =.*" With "mydomain = iu.hio.no"
ReplaceAll "^relayhost =.*" With "relayhost = [nexus.iu.hio.no]"
# Check the lines are there at all
AppendIfNoSuchLine "relayhost = [nexus.iu.hio.no]"
AppendIfNoSuchLine "mydomain = iu.hio.no"
}
I had to add a little finesse/patch to the detection of non-convergent
operation to make this work. If you get the latest snapshot version, it
should worlk for you..
Mark
On Wed, 2005-02-23 at 02:14 -0500, Yaroslav Halchenko wrote:
> Dear cfengine-admirers
>
> Am I missing the point or cfengine[2] is missing I would say
> most-often-used function which can be named like
>
> AssignValue 'X FS' Z
>
> which I would use whenever I want change/add_a_line_with a right
> hand side of any assignment like
>
> X FS Y
> to
> X FS Z
>
> where X is a name
> FS is field separator (usually is ' *= *' or just ' *')
> and Y and Z are values
>
> The absense of such function and the fact that ReplaceAll doesn't quite
> fit due to possible recursion, led people to device monsters like
>
> http://www.shipyard.com.au/shipyard/articles/sysadmin/cfengine-configfiles.py
>
> where for a simple obioius rule like
>
> AssignValue '^LogLevel *' 'INFO'
>
> is presented as
>
> BeginGroupIfNoLineMatching '^LogLevel.*'
> Append 'LogLevel'
> EndGroup
> ResetSearch 1
> LocateLineMatching '^LogLevel.*'
> BeginGroupIfNoMatch '^LogLevel INFO$'
> ReplaceLineWith 'LogLevel INFO'
> EndGroup
>
> which shows you how much duplication is necessary to handle such
> situation in a right way.
>
> Is there a way to fix the situation or describe me where I'm wrong?
>
> Thank you all in advance
>
>
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