[SR-Users] Unquoted values from #!defenv

[Daniel-Constantin Mierla]

Hello,

#!substdef does not set the value inside quoted string, it replaces
inside a string value, so it does not put quotes around replacement
part. So it does it it is written in the docs. There is #!substdefs
witch can create a define with quoted value.

Note that defines are standalone-token replacement, you can define an ID
to a number, to a keyword (e.g., src_ip), to a quoted string or even a
multi-line script snippet, like:

#!define IDLOOP $var(i) = 0; \
                while($var(i)<5) { \
                    xlog("++++ $var(i)\n"); \
                    $var(i) = $var(i) + 1; \
                }

See the core cookbook for more details.

Anyhow, as using env variable values as quoted string is useful and
setting them with quotes might look odd, I added #!defenvs:

  * https://www.kamailio.org/wiki/cookbooks/devel/core#defenvs

Cheers,
Daniel

On 30.11.21 22:40, Ben Kaufman wrote:
>
> Hello all,
>
>  
>
> Looking for some clarification regarding quoting and !#defenv .  I
> understand that the example below fails because the environmental
> variable HOME is not quoted, thus when used in the xlog() call it
> fails.  How is it possible to evaluate and/or use the value of the
> environmental variable if defined as a preprocessor variable?  Looking
> at the documentation the reason for this directive is “It is a
> simplified alternative of using *#!substdef* with *$env(NAME)* in the
> replacement part.” But #!substdef would allow setting the value inside
> of a quoted string, so does it really meet that requirement?
>
>  
>
> I’m aware that I could use $env(HOME) rather than a preprocessor
> directive of HOME.  I’m just trying to understand the usage of the
> #!defenv feature.
>
>  
>
>  
>
> #!KAMAILIO
>
> ## Tested in 5.5.2
>
> loadmodule "xlog"
>
> loadmodule "pv"
>
> loadmodule "evrexec"
>
>  
>
> modparam("evrexec", "exec", "name=evrexec:timer;wait=1000;workers=1;")
>
>  
>
> #!defenv HOME
>
>  
>
> request_route{
>
>     forward();
>
> }
>
>  
>
> event_route[evrexec:timer] {
>
>     xlog("L_N", "HOME: " + HOME + "\n");
>
> }
>
>  
>
>  
>
> *Ben Kaufman*
>
>
>  
>
>  
>
>
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-- 
Daniel-Constantin Mierla -- www.asipto.com
www.twitter.com/miconda -- www.linkedin.com/in/miconda
Kamailio Advanced Training - Online
  Feb 21-24, 2022 (America Timezone)
  * https://www.asipto.com/sw/kamailio-advanced-training-online/
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