Unquoted values from #!defenv

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Ben Kaufman

30 Nov 2021 30 Nov '21

9:40 p.m.

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

6 Dec 6 Dec

9:55 a.m.

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*

Kamailio - Users Mailing List - Non Commercial Discussions

sr-users@lists.kamailio.org

Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe:

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Ben Kaufman

8:56 p.m.

Thank you :)

A follow up question would be on the usability of the #!defenv (and probably #!defenvs) usability with #!ifdef. In the scenario below, if the environmental variable WITH_DEBUGGER is not defined, then Kamailio will fail to start, thus the #!ifdef is somewhat limited. It makes sense for scenarios where someone might toggle the setting editing the config file, but it would be very convenient to toggle the environmental variable instead, particularly in containerized environments. Any thoughts on how best to control this?

#!defenv WITH_DEBUGGER

#!ifdef WITH_DEBUGGER loadmodule "debugger" . . . #!endif

Ben Kaufman

From: Daniel-Constantin Mierla miconda@gmail.com Sent: Monday, December 6, 2021 3:55 AM To: Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org; Ben Kaufman bkaufman@nexvortex.com Subject: Re: [SR-Users] Unquoted values from #!defenv

Hello,

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 https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.kamailio.org%2Fwiki%2Fcookbooks%2Fdevel%2Fcore%23defenvs&data=04%7C01%7Cbkaufman%40nexvortex.com%7C6028b5b0b93344af8d0308d9b89e8a04%7Cafc1818e7b6848568913201b9396c4fc%7C1%7C0%7C637743813349298668%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&sdata=Q2j9FAXfUTB2uNwKhu5OeEmQanN7xmMGDYb9JBJw6JY%3D&reserved=0

Cheers, Daniel On 30.11.21 22:40, Ben Kaufman wrote: Hello all,

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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Feb 21-24, 2022 (America Timezone)

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Daniel-Constantin Mierla

7 Dec 7 Dec

8:21 a.m.

The current behaviour targets the use of existing values from the environment variables. If you need other kind of features, you can propose pull requests. Or you can eventually have a start script that sets defines with -A cli parameter based on env variables.

Cheers, Daniel

On 06.12.21 21:56, Ben Kaufman wrote:

...

Thank you :)

A follow up question would be on the usability of the #!defenv (and probably #!defenvs) usability with #!ifdef. In the scenario below, if the environmental variable WITH_DEBUGGER is not defined, then Kamailio will fail to start, thus the #!ifdef is somewhat limited. It makes sense for scenarios where someone might toggle the setting editing the config file, but it would be very convenient to toggle the environmental variable instead, particularly in containerized environments. Any thoughts on how best to control this?

#!defenv WITH_DEBUGGER

#!ifdef WITH_DEBUGGER

loadmodule "debugger"

. . .

#!endif

*Ben Kaufman*

*From:* Daniel-Constantin Mierla miconda@gmail.com *Sent:* Monday, December 6, 2021 3:55 AM *To:* Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org; Ben Kaufman bkaufman@nexvortex.com *Subject:* Re: [SR-Users] Unquoted values from #!defenv

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 https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.kamailio.org%2Fwiki%2Fcookbooks%2Fdevel%2Fcore%23defenvs&data=04%7C01%7Cbkaufman%40nexvortex.com%7C6028b5b0b93344af8d0308d9b89e8a04%7Cafc1818e7b6848568913201b9396c4fc%7C1%7C0%7C637743813349298668%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&sdata=Q2j9FAXfUTB2uNwKhu5OeEmQanN7xmMGDYb9JBJw6JY%3D&reserved=0

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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Important: keep the mailing list in the recipients, do not reply only to the sender!

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Ben Kaufman

3:12 p.m.

Thank you. I've been using -A to set values thus far as CMD arguments to the container's ENTRYPOINT. If submitting a pull request, would it be preferrable to allow #!defenv/#!defenvs to accept undefined values, or to add new keywords like #!ifdefenv/#!ifdefenvs ?

Ben Kaufman

From: Daniel-Constantin Mierla miconda@gmail.com Sent: Tuesday, December 7, 2021 2:22 AM To: Ben Kaufman bkaufman@bcmone.com; Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org Subject: Re: [SR-Users] Unquoted values from #!defenv

Cheers, Daniel On 06.12.21 21:56, Ben Kaufman wrote: Thank you :)

#!defenv WITH_DEBUGGER

#!ifdef WITH_DEBUGGER loadmodule "debugger" . . . #!endif

Ben Kaufman

From: Daniel-Constantin Mierla miconda@gmail.com mailto:miconda@gmail.com Sent: Monday, December 6, 2021 3:55 AM To: Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org mailto:sr-users@lists.kamailio.org; Ben Kaufman bkaufman@nexvortex.com mailto:bkaufman@nexvortex.com Subject: Re: [SR-Users] Unquoted values from #!defenv

Hello,

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 https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.kamailio.org%2Fwiki%2Fcookbooks%2Fdevel%2Fcore%23defenvs&data=04%7C01%7Cbkaufman%40bcmone.com%7Cbe35f30c00944bc8f2fe08d9b95a962b%7Cafc1818e7b6848568913201b9396c4fc%7C1%7C0%7C637744621006480569%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=5B%2FgzQZTVhvrCUWvrRh5YkFkKnX%2BGTA1Wy2M2L1nFQ4%3D&reserved=0

Cheers, Daniel On 30.11.21 22:40, Ben Kaufman wrote: Hello all,

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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Ben Kaufman

8 Dec 8 Dec

4:17 p.m.

Daniel,

Is the #!defenvs feature still a work in progress? I wrote a change to add #!defenvn and #!defenvns to allow for undefined environmental variables, and noticed that the string quoting on #!defenvs doesn't do anything except log the quoting mode in /src/core/ pp_define_set(). Ben Kaufman Sr. VoIP Engineer P: E: bkaufman@bcmone.commailto:bkaufman@bcmone.com 24 hour client support: 855.639.6300tel:+18556396300

From: sr-users sr-users-bounces@lists.kamailio.org On Behalf Of Ben Kaufman Sent: Tuesday, December 7, 2021 9:12 AM To: Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org Subject: Re: [SR-Users] Unquoted values from #!defenv

Ben Kaufman

From: Daniel-Constantin Mierla <miconda@gmail.commailto:miconda@gmail.com> Sent: Tuesday, December 7, 2021 2:22 AM To: Ben Kaufman <bkaufman@bcmone.commailto:bkaufman@bcmone.com>; Kamailio (SER) - Users Mailing List <sr-users@lists.kamailio.orgmailto:sr-users@lists.kamailio.org> Subject: Re: [SR-Users] Unquoted values from #!defenv

Cheers, Daniel On 06.12.21 21:56, Ben Kaufman wrote: Thank you :)

#!defenv WITH_DEBUGGER

#!ifdef WITH_DEBUGGER loadmodule "debugger" . . . #!endif

Ben Kaufman

Hello,

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 https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.kamailio.org%2Fwiki%2Fcookbooks%2Fdevel%2Fcore%23defenvs&data=04%7C01%7Cbkaufman%40bcmone.com%7C1aca7b0156bf4d96bc9508d9b9941bbd%7Cafc1818e7b6848568913201b9396c4fc%7C1%7C0%7C637744868075326626%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=nIrsUUO%2Bn8zUzUxCfm9T%2BqLC6HzHPIxDTS80bKGq95w%3D&reserved=0

Cheers, Daniel On 30.11.21 22:40, Ben Kaufman wrote: Hello all,

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

6:07 p.m.

I expected the quoted mode parameter does the work -- I will check and push the update.

Regarding support for undefined env values, maybe add something like #!trydefenv, because I find #!defenv useful at is it, to be used when the env variable must be set for proper working of kamailio (e.g., DB url) and fail to start if not set.

Cheers, Daniel

On 08.12.21 17:17, Ben Kaufman wrote:

...

Daniel,

Is the #!defenvs feature still a work in progress? I wrote a change to add #!defenvn and #!defenvns to allow for undefined environmental variables, and noticed that the string quoting on #!defenvs doesn’t do anything except log the quoting mode in /src/core/ pp_define_set().

*Ben Kaufman*

/Sr. VoIP Engineer/

P:

E: bkaufman@bcmone.com

24 hour client support: 855.639.6300 tel:+18556396300

*From:* sr-users sr-users-bounces@lists.kamailio.org *On Behalf Of *Ben Kaufman *Sent:* Tuesday, December 7, 2021 9:12 AM *To:* Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org *Subject:* Re: [SR-Users] Unquoted values from #!defenv

Thank you. I’ve been using -A to set values thus far as CMD arguments to the container’s ENTRYPOINT. If submitting a pull request, would it be preferrable to allow #!defenv/#!defenvs to accept undefined values, or to add new keywords like #!ifdefenv/#!ifdefenvs ?

*Ben Kaufman*

*From:* Daniel-Constantin Mierla miconda@gmail.com *Sent:* Tuesday, December 7, 2021 2:22 AM *To:* Ben Kaufman bkaufman@bcmone.com; Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org *Subject:* Re: [SR-Users] Unquoted values from #!defenv

The current behaviour targets the use of existing values from the environment variables. If you need other kind of features, you can propose pull requests. Or you can eventually have a start script that sets defines with -A cli parameter based on env variables.

Cheers, Daniel

On 06.12.21 21:56, Ben Kaufman wrote:
Thank you :)

 

A follow up question would be on the usability of the #!defenv
(and probably #!defenvs) usability with #!ifdef.  In the scenario
below, if the environmental variable WITH_DEBUGGER is not defined,
then Kamailio will fail to start, thus the #!ifdef is somewhat
limited.  It makes sense for scenarios where someone might toggle
the setting editing the config file, but it would be very
convenient to toggle the environmental variable instead,
particularly in containerized environments.   Any thoughts on how
best to control this?

 

#!defenv WITH_DEBUGGER

 

#!ifdef WITH_DEBUGGER

loadmodule "debugger"

. . .

#!endif

 

 

 

 

*Ben Kaufman*


 

*From:* Daniel-Constantin Mierla <miconda@gmail.com>
<mailto:miconda@gmail.com>
*Sent:* Monday, December 6, 2021 3:55 AM
*To:* Kamailio (SER) - Users Mailing List
<sr-users@lists.kamailio.org>
<mailto:sr-users@lists.kamailio.org>; Ben Kaufman
<bkaufman@nexvortex.com> <mailto:bkaufman@nexvortex.com>
*Subject:* Re: [SR-Users] Unquoted values from #!defenv

 

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
<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.kamailio.org%2Fwiki%2Fcookbooks%2Fdevel%2Fcore%23defenvs&data=04%7C01%7Cbkaufman%40bcmone.com%7C1aca7b0156bf4d96bc9508d9b9941bbd%7Cafc1818e7b6848568913201b9396c4fc%7C1%7C0%7C637744868075326626%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=nIrsUUO%2Bn8zUzUxCfm9T%2BqLC6HzHPIxDTS80bKGq95w%3D&reserved=0>

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

9 Dec 9 Dec

9:54 a.m.

I pushed the code to enclose the value in between quotes. Can you test and see if works now?

Cheers, Daniel

On 08.12.21 19:07, Daniel-Constantin Mierla wrote:

...

I expected the quoted mode parameter does the work -- I will check and push the update.

Regarding support for undefined env values, maybe add something like #!trydefenv, because I find #!defenv useful at is it, to be used when the env variable must be set for proper working of kamailio (e.g., DB url) and fail to start if not set.

Cheers, Daniel

On 08.12.21 17:17, Ben Kaufman wrote:

...
Daniel,

Is the #!defenvs feature still a work in progress? I wrote a change to add #!defenvn and #!defenvns to allow for undefined environmental variables, and noticed that the string quoting on #!defenvs doesn’t do anything except log the quoting mode in /src/core/ pp_define_set().

*Ben Kaufman*

/Sr. VoIP Engineer/

P:

E: bkaufman@bcmone.com

24 hour client support: 855.639.6300 tel:+18556396300

*From:* sr-users sr-users-bounces@lists.kamailio.org *On Behalf Of *Ben Kaufman *Sent:* Tuesday, December 7, 2021 9:12 AM *To:* Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org *Subject:* Re: [SR-Users] Unquoted values from #!defenv

Thank you. I’ve been using -A to set values thus far as CMD arguments to the container’s ENTRYPOINT. If submitting a pull request, would it be preferrable to allow #!defenv/#!defenvs to accept undefined values, or to add new keywords like #!ifdefenv/#!ifdefenvs ?

*Ben Kaufman*

*From:* Daniel-Constantin Mierla miconda@gmail.com *Sent:* Tuesday, December 7, 2021 2:22 AM *To:* Ben Kaufman bkaufman@bcmone.com; Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org *Subject:* Re: [SR-Users] Unquoted values from #!defenv

The current behaviour targets the use of existing values from the environment variables. If you need other kind of features, you can propose pull requests. Or you can eventually have a start script that sets defines with -A cli parameter based on env variables.

Cheers, Daniel

On 06.12.21 21:56, Ben Kaufman wrote:
Thank you :)

 

A follow up question would be on the usability of the #!defenv
(and probably #!defenvs) usability with #!ifdef.  In the scenario
below, if the environmental variable WITH_DEBUGGER is not
defined, then Kamailio will fail to start, thus the #!ifdef is
somewhat limited.  It makes sense for scenarios where someone
might toggle the setting editing the config file, but it would be
very convenient to toggle the environmental variable instead,
particularly in containerized environments.   Any thoughts on how
best to control this?

 

#!defenv WITH_DEBUGGER

 

#!ifdef WITH_DEBUGGER

loadmodule "debugger"

. . .

#!endif

 

 

 

 

*Ben Kaufman*


 

*From:* Daniel-Constantin Mierla <miconda@gmail.com>
<mailto:miconda@gmail.com>
*Sent:* Monday, December 6, 2021 3:55 AM
*To:* Kamailio (SER) - Users Mailing List
<sr-users@lists.kamailio.org>
<mailto:sr-users@lists.kamailio.org>; Ben Kaufman
<bkaufman@nexvortex.com> <mailto:bkaufman@nexvortex.com>
*Subject:* Re: [SR-Users] Unquoted values from #!defenv

 

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
<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.kamailio.org%2Fwiki%2Fcookbooks%2Fdevel%2Fcore%23defenvs&data=04%7C01%7Cbkaufman%40bcmone.com%7C1aca7b0156bf4d96bc9508d9b9941bbd%7Cafc1818e7b6848568913201b9396c4fc%7C1%7C0%7C637744868075326626%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=nIrsUUO%2Bn8zUzUxCfm9T%2BqLC6HzHPIxDTS80bKGq95w%3D&reserved=0>

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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Ben Kaufman

2:57 p.m.

Thank you. It's tested and working with this simple config:

#!KAMAILIO

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"); }

Regards,

Kaufman

From: Daniel-Constantin Mierla miconda@gmail.com Sent: Thursday, December 9, 2021 3:55 AM To: Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org; Ben Kaufman bkaufman@bcmone.com Subject: Re: [SR-Users] Unquoted values from #!defenv

I pushed the code to enclose the value in between quotes. Can you test and see if works now?

Cheers, Daniel On 08.12.21 19:07, Daniel-Constantin Mierla wrote:

I expected the quoted mode parameter does the work -- I will check and push the update.

Cheers, Daniel On 08.12.21 17:17, Ben Kaufman wrote: Daniel,

From: sr-users sr-users-bounces@lists.kamailio.org mailto:sr-users-bounces@lists.kamailio.org On Behalf Of Ben Kaufman Sent: Tuesday, December 7, 2021 9:12 AM To: Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org mailto:sr-users@lists.kamailio.org Subject: Re: [SR-Users] Unquoted values from #!defenv

Ben Kaufman

Cheers, Daniel On 06.12.21 21:56, Ben Kaufman wrote: Thank you :)

#!defenv WITH_DEBUGGER

#!ifdef WITH_DEBUGGER loadmodule "debugger" . . . #!endif

Ben Kaufman

Hello,

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 https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.kamailio.org%2Fwiki%2Fcookbooks%2Fdevel%2Fcore%23defenvs&data=04%7C01%7Cbkaufman%40bcmone.com%7C7f2519a79bfe44fe14b108d9baf9fcfc%7Cafc1818e7b6848568913201b9396c4fc%7C1%7C0%7C637746405128674863%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=9d81Vu%2FH5XERc4ct6lzKWQYFfAqTM4gocdKD85cXclw%3D&reserved=0

Cheers, Daniel On 30.11.21 22:40, Ben Kaufman wrote: Hello all,

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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Ben Kaufman

4:50 p.m.

It does appear that #!devenvs subsequently has problems if the environmental variable is already quoted, though. I'll put together an example and open a ticket for it.

From: Ben Kaufman Sent: Thursday, December 9, 2021 8:57 AM To: Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org Subject: RE: [SR-Users] Unquoted values from #!defenv

Thank you. It's tested and working with this simple config:

#!KAMAILIO

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"); }

Regards,

Kaufman

From: Daniel-Constantin Mierla <miconda@gmail.commailto:miconda@gmail.com> Sent: Thursday, December 9, 2021 3:55 AM To: Kamailio (SER) - Users Mailing List <sr-users@lists.kamailio.orgmailto:sr-users@lists.kamailio.org>; Ben Kaufman <bkaufman@bcmone.commailto:bkaufman@bcmone.com> Subject: Re: [SR-Users] Unquoted values from #!defenv

I pushed the code to enclose the value in between quotes. Can you test and see if works now?

Cheers, Daniel On 08.12.21 19:07, Daniel-Constantin Mierla wrote:

I expected the quoted mode parameter does the work -- I will check and push the update.

Cheers, Daniel On 08.12.21 17:17, Ben Kaufman wrote: Daniel,

Ben Kaufman

Cheers, Daniel On 06.12.21 21:56, Ben Kaufman wrote: Thank you :)

#!defenv WITH_DEBUGGER

#!ifdef WITH_DEBUGGER loadmodule "debugger" . . . #!endif

Ben Kaufman

Hello,

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:

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Cheers, Daniel On 30.11.21 22:40, Ben Kaufman wrote: Hello all,

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

4:59 p.m.

If the value is already quoted, then #!devenv should be used, that's the reason there are two variants to take it as it is or surround with quotes.

Cheers, Daniel

On 09.12.21 17:50, Ben Kaufman wrote:

...

It does appear that #!devenvs subsequently has problems if the environmental variable is already quoted, though. I’ll put together an example and open a ticket for it.

*From:* Ben Kaufman *Sent:* Thursday, December 9, 2021 8:57 AM *To:* Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org *Subject:* RE: [SR-Users] Unquoted values from #!defenv

Thank you. It’s tested and working with this simple config:

#!KAMAILIO

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"); }

Regards,

Kaufman

*From:* Daniel-Constantin Mierla miconda@gmail.com *Sent:* Thursday, December 9, 2021 3:55 AM *To:* Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org; Ben Kaufman bkaufman@bcmone.com *Subject:* Re: [SR-Users] Unquoted values from #!defenv

I pushed the code to enclose the value in between quotes. Can you test and see if works now?

Cheers, Daniel

On 08.12.21 19:07, Daniel-Constantin Mierla wrote:

I expected the quoted mode parameter does the work -- I will check
and push the update.

Regarding support for undefined env values, maybe add something
like #!trydefenv, because I find #!defenv useful at is it, to be
used when the env variable must be set for proper working of
kamailio (e.g., DB url) and fail to start if not set.

Cheers,
Daniel

On 08.12.21 17:17, Ben Kaufman wrote:

    Daniel,

     

    Is the #!defenvs feature still a work in progress? I wrote a
    change to add #!defenvn and #!defenvns to allow for undefined
    environmental variables, and noticed that the string quoting
    on #!defenvs doesn’t do anything except log the quoting mode
    in /src/core/ pp_define_set().

    *Ben Kaufman*

    /Sr. VoIP Engineer/


    P:

    E: bkaufman@bcmone.com

    24 hour client support: 855.639.6300 <tel:+18556396300>


     

    *From:* sr-users <sr-users-bounces@lists.kamailio.org>
    <mailto:sr-users-bounces@lists.kamailio.org> *On Behalf Of
    *Ben Kaufman
    *Sent:* Tuesday, December 7, 2021 9:12 AM
    *To:* Kamailio (SER) - Users Mailing List
    <sr-users@lists.kamailio.org> <mailto:sr-users@lists.kamailio.org>
    *Subject:* Re: [SR-Users] Unquoted values from #!defenv

     

    Thank you.  I’ve been using -A to set values thus far as CMD
    arguments to the container’s ENTRYPOINT.  If submitting a pull
    request, would it be preferrable to allow #!defenv/#!defenvs
    to accept undefined values, or to add new keywords like
    #!ifdefenv/#!ifdefenvs ?

     

    *Ben Kaufman*


     

    *From:* Daniel-Constantin Mierla <miconda@gmail.com>
    *Sent:* Tuesday, December 7, 2021 2:22 AM
    *To:* Ben Kaufman <bkaufman@bcmone.com>; Kamailio (SER) -
    Users Mailing List <sr-users@lists.kamailio.org>
    *Subject:* Re: [SR-Users] Unquoted values from #!defenv

     

    The current behaviour targets the use of existing values from
    the environment variables. If you need other kind of features,
    you can propose pull requests. Or you can eventually have a
    start script that sets defines with -A cli parameter based on
    env variables.

    Cheers,
    Daniel

    On 06.12.21 21:56, Ben Kaufman wrote:

        Thank you :)

         

        A follow up question would be on the usability of the
        #!defenv (and probably #!defenvs) usability with #!ifdef. 
        In the scenario below, if the environmental variable
        WITH_DEBUGGER is not defined, then Kamailio will fail to
        start, thus the #!ifdef is somewhat limited.  It makes
        sense for scenarios where someone might toggle the setting
        editing the config file, but it would be very convenient
        to toggle the environmental variable instead, particularly
        in containerized environments.   Any thoughts on how best
        to control this?

         

        #!defenv WITH_DEBUGGER

         

        #!ifdef WITH_DEBUGGER

        loadmodule "debugger"

        . . .

        #!endif

         

         

         

         

        *Ben Kaufman*


         

        *From:* Daniel-Constantin Mierla <miconda@gmail.com>
        <mailto:miconda@gmail.com>
        *Sent:* Monday, December 6, 2021 3:55 AM
        *To:* Kamailio (SER) - Users Mailing List
        <sr-users@lists.kamailio.org>
        <mailto:sr-users@lists.kamailio.org>; Ben Kaufman
        <bkaufman@nexvortex.com> <mailto:bkaufman@nexvortex.com>
        *Subject:* Re: [SR-Users] Unquoted values from #!defenv

         

        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
        <https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.kamailio.org%2Fwiki%2Fcookbooks%2Fdevel%2Fcore%23defenvs&data=04%7C01%7Cbkaufman%40bcmone.com%7C7f2519a79bfe44fe14b108d9baf9fcfc%7Cafc1818e7b6848568913201b9396c4fc%7C1%7C0%7C637746405128674863%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=9d81Vu%2FH5XERc4ct6lzKWQYFfAqTM4gocdKD85cXclw%3D&reserved=0>

        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

5:01 p.m.

The example snippet you gave is with #!devenv, not with #!devenvs. Is it what you tested in this case?

Cheers, Daniel

On 09.12.21 15:57, Ben Kaufman wrote:

...

Thank you. It’s tested and working with this simple config:

#!KAMAILIO

loadmodule "xlog" loadmodule "pv" loadmodule "evrexec"

modparam("evrexec", "exec", "name=evrexec:timer;wait=1000;workers=1;")

c HOME

request_route{ forward(); }

event_route[evrexec:timer] { xlog("L_N", "HOME: " + HOME + "\n"); }

Regards,

Kaufman

I pushed the code to enclose the value in between quotes. Can you test and see if works now?

Cheers, Daniel

On 08.12.21 19:07, Daniel-Constantin Mierla wrote:

I expected the quoted mode parameter does the work -- I will check
and push the update.

Regarding support for undefined env values, maybe add something
like #!trydefenv, because I find #!defenv useful at is it, to be
used when the env variable must be set for proper working of
kamailio (e.g., DB url) and fail to start if not set.

Cheers,
Daniel

On 08.12.21 17:17, Ben Kaufman wrote:

    Daniel,

     

    Is the #!defenvs feature still a work in progress? I wrote a
    change to add #!defenvn and #!defenvns to allow for undefined
    environmental variables, and noticed that the string quoting
    on #!defenvs doesn’t do anything except log the quoting mode
    in /src/core/ pp_define_set().

    *Ben Kaufman*

    /Sr. VoIP Engineer/


    P:

    E: bkaufman@bcmone.com

    24 hour client support: 855.639.6300 <tel:+18556396300>


     

    *From:* sr-users <sr-users-bounces@lists.kamailio.org>
    <mailto:sr-users-bounces@lists.kamailio.org> *On Behalf Of
    *Ben Kaufman
    *Sent:* Tuesday, December 7, 2021 9:12 AM
    *To:* Kamailio (SER) - Users Mailing List
    <sr-users@lists.kamailio.org> <mailto:sr-users@lists.kamailio.org>
    *Subject:* Re: [SR-Users] Unquoted values from #!defenv

     

    Thank you.  I’ve been using -A to set values thus far as CMD
    arguments to the container’s ENTRYPOINT.  If submitting a pull
    request, would it be preferrable to allow #!defenv/#!defenvs
    to accept undefined values, or to add new keywords like
    #!ifdefenv/#!ifdefenvs ?

     

    *Ben Kaufman*


     

    *From:* Daniel-Constantin Mierla <miconda@gmail.com>
    *Sent:* Tuesday, December 7, 2021 2:22 AM
    *To:* Ben Kaufman <bkaufman@bcmone.com>; Kamailio (SER) -
    Users Mailing List <sr-users@lists.kamailio.org>
    *Subject:* Re: [SR-Users] Unquoted values from #!defenv

     

    The current behaviour targets the use of existing values from
    the environment variables. If you need other kind of features,
    you can propose pull requests. Or you can eventually have a
    start script that sets defines with -A cli parameter based on
    env variables.

    Cheers,
    Daniel

    On 06.12.21 21:56, Ben Kaufman wrote:

        Thank you :)

         

        A follow up question would be on the usability of the
        #!defenv (and probably #!defenvs) usability with #!ifdef. 
        In the scenario below, if the environmental variable
        WITH_DEBUGGER is not defined, then Kamailio will fail to
        start, thus the #!ifdef is somewhat limited.  It makes
        sense for scenarios where someone might toggle the setting
        editing the config file, but it would be very convenient
        to toggle the environmental variable instead, particularly
        in containerized environments.   Any thoughts on how best
        to control this?

         

        #!defenv WITH_DEBUGGER

         

        #!ifdef WITH_DEBUGGER

        loadmodule "debugger"

        . . .

        #!endif

         

         

         

         

        *Ben Kaufman*


         

        *From:* Daniel-Constantin Mierla <miconda@gmail.com>
        <mailto:miconda@gmail.com>
        *Sent:* Monday, December 6, 2021 3:55 AM
        *To:* Kamailio (SER) - Users Mailing List
        <sr-users@lists.kamailio.org>
        <mailto:sr-users@lists.kamailio.org>; Ben Kaufman
        <bkaufman@nexvortex.com> <mailto:bkaufman@nexvortex.com>
        *Subject:* Re: [SR-Users] Unquoted values from #!defenv

         

        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
        <https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.kamailio.org%2Fwiki%2Fcookbooks%2Fdevel%2Fcore%23defenvs&data=04%7C01%7Cbkaufman%40bcmone.com%7C7f2519a79bfe44fe14b108d9baf9fcfc%7Cafc1818e7b6848568913201b9396c4fc%7C1%7C0%7C637746405128674863%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=9d81Vu%2FH5XERc4ct6lzKWQYFfAqTM4gocdKD85cXclw%3D&reserved=0>

        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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Ben Kaufman

5:13 p.m.

Sorry, I noticed the file discrepancy after sending the email. I did make sure to retest with #!defenvs and it does work.

With regards to quoted/unquoted envvars, I'm not expecting that a quoted environmental variable would do anything with the quotes, but right now, Kamailio will fail to start when using #!defenvs with a quoted variable. If I set:

export FOO= ""bar""

and use:

#!defenvs FOO

Kamailio will fail to start. I would expect it to have literal quotes in the string.

Ben Kaufman Sr. VoIP Engineer P: E: bkaufman@bcmone.commailto:bkaufman@bcmone.com 24 hour client support: 855.639.6300tel:+18556396300

From: Daniel-Constantin Mierla miconda@gmail.com Sent: Thursday, December 9, 2021 11:02 AM To: Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org; Ben Kaufman bkaufman@bcmone.com Subject: Re: [SR-Users] Unquoted values from #!defenv

The example snippet you gave is with #!devenv, not with #!devenvs. Is it what you tested in this case?

Cheers, Daniel On 09.12.21 15:57, Ben Kaufman wrote: Thank you. It's tested and working with this simple config:

#!KAMAILIO

loadmodule "xlog" loadmodule "pv" loadmodule "evrexec"

modparam("evrexec", "exec", "name=evrexec:timer;wait=1000;workers=1;")

c HOME

request_route{ forward(); }

event_route[evrexec:timer] { xlog("L_N", "HOME: " + HOME + "\n"); }

Regards,

Kaufman

From: Daniel-Constantin Mierla miconda@gmail.com mailto:miconda@gmail.com Sent: Thursday, December 9, 2021 3:55 AM To: Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org mailto:sr-users@lists.kamailio.org; Ben Kaufman bkaufman@bcmone.com mailto:bkaufman@bcmone.com Subject: Re: [SR-Users] Unquoted values from #!defenv

I pushed the code to enclose the value in between quotes. Can you test and see if works now?

Cheers, Daniel On 08.12.21 19:07, Daniel-Constantin Mierla wrote:

I expected the quoted mode parameter does the work -- I will check and push the update.

Cheers, Daniel On 08.12.21 17:17, Ben Kaufman wrote: Daniel,

Ben Kaufman

Cheers, Daniel On 06.12.21 21:56, Ben Kaufman wrote: Thank you :)

#!defenv WITH_DEBUGGER

#!ifdef WITH_DEBUGGER loadmodule "debugger" . . . #!endif

Ben Kaufman

Hello,

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 https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.kamailio.org%2Fwiki%2Fcookbooks%2Fdevel%2Fcore%23defenvs&data=04%7C01%7Cbkaufman%40bcmone.com%7Cd99fd09975ff46f9a2a808d9bb358e16%7Cafc1818e7b6848568913201b9396c4fc%7C1%7C0%7C637746660990886102%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=rzHyN6OflNNZgm1%2BnXypY01FK1VzlvMnQlOLrWJKOsQ%3D&reserved=0

Cheers, Daniel On 30.11.21 22:40, Ben Kaufman wrote: Hello all,

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

6:36 p.m.

#!defines are preprocessor directives, think about them like copy+paste and then config interpreter tries to understand the config content.

As one example in the wiki, the value of a define can be even a script snippet -- see the define of IDLOOP:

* https://www.kamailio.org/wiki/cookbooks/5.5.x/core#define

Your example fails because it results in copying and surrounding the value with quotes, so the interpreter sees:

""bar""

practically, it is empty string followed by token 'bar' and followed by another empty string.

It is the expected behaviour, similar to what happens in C with #define macros. One must know what sets in the value and use the appropriate pre-processor directive.

Cheers, Daniel

On 09.12.21 18:13, Ben Kaufman wrote:

...

Sorry, I noticed the file discrepancy after sending the email. I did make sure to retest with #!defenvs and it does work.

With regards to quoted/unquoted envvars, I’m not expecting that a quoted environmental variable would do anything with the quotes, but right now, Kamailio will fail to start when using #!defenvs with a quoted variable. If I set:

export FOO= ""bar""

and use:

#!defenvs FOO

Kamailio will fail to start. I would expect it to have literal quotes in the string.

*Ben Kaufman*

/Sr. VoIP Engineer/

E: bkaufman@bcmone.com

24 hour client support: 855.639.6300 tel:+18556396300

*From:* Daniel-Constantin Mierla miconda@gmail.com *Sent:* Thursday, December 9, 2021 11:02 AM *To:* Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org; Ben Kaufman bkaufman@bcmone.com *Subject:* Re: [SR-Users] Unquoted values from #!defenv

The example snippet you gave is with #!devenv, not with #!devenvs. Is it what you tested in this case?

Cheers, Daniel

On 09.12.21 15:57, Ben Kaufman wrote:

Thank you.  It’s tested and working with this simple config:

 

 

#!KAMAILIO

loadmodule "xlog"
loadmodule "pv"
loadmodule "evrexec"

modparam("evrexec", "exec", "name=evrexec:timer;wait=1000;workers=1;")

c HOME

request_route{
    forward();
}

event_route[evrexec:timer] {
    xlog("L_N", "HOME: " + HOME + "\n");
}

 

 

Regards,


Kaufman

 

 

*From:* Daniel-Constantin Mierla <miconda@gmail.com>
<mailto:miconda@gmail.com>
*Sent:* Thursday, December 9, 2021 3:55 AM
*To:* Kamailio (SER) - Users Mailing List
<sr-users@lists.kamailio.org>
<mailto:sr-users@lists.kamailio.org>; Ben Kaufman
<bkaufman@bcmone.com> <mailto:bkaufman@bcmone.com>
*Subject:* Re: [SR-Users] Unquoted values from #!defenv

 

I pushed the code to enclose the value in between quotes. Can you
test and see if works now?

Cheers,
Daniel

On 08.12.21 19:07, Daniel-Constantin Mierla wrote:

    I expected the quoted mode parameter does the work -- I will
    check and push the update.

    Regarding support for undefined env values, maybe add
    something like #!trydefenv, because I find #!defenv useful at
    is it, to be used when the env variable must be set for proper
    working of kamailio (e.g., DB url) and fail to start if not set.

    Cheers,
    Daniel

    On 08.12.21 17:17, Ben Kaufman wrote:

        Daniel,

         

        Is the #!defenvs feature still a work in progress? I wrote
        a change to add #!defenvn and #!defenvns to allow for
        undefined environmental variables, and noticed that the
        string quoting on #!defenvs doesn’t do anything except log
        the quoting mode in /src/core/ pp_define_set().

        *Ben Kaufman*

        /Sr. VoIP Engineer/


        P:

        E: bkaufman@bcmone.com

        24 hour client support: 855.639.6300 <tel:+18556396300>


         

        *From:* sr-users <sr-users-bounces@lists.kamailio.org>
        <mailto:sr-users-bounces@lists.kamailio.org> *On Behalf Of
        *Ben Kaufman
        *Sent:* Tuesday, December 7, 2021 9:12 AM
        *To:* Kamailio (SER) - Users Mailing List
        <sr-users@lists.kamailio.org>
        <mailto:sr-users@lists.kamailio.org>
        *Subject:* Re: [SR-Users] Unquoted values from #!defenv

         

        Thank you.  I’ve been using -A to set values thus far as
        CMD arguments to the container’s ENTRYPOINT.  If
        submitting a pull request, would it be preferrable to
        allow #!defenv/#!defenvs to accept undefined values, or to
        add new keywords like #!ifdefenv/#!ifdefenvs ?

         

        *Ben Kaufman*


         

        *From:* Daniel-Constantin Mierla <miconda@gmail.com>
        *Sent:* Tuesday, December 7, 2021 2:22 AM
        *To:* Ben Kaufman <bkaufman@bcmone.com>; Kamailio (SER) -
        Users Mailing List <sr-users@lists.kamailio.org>
        *Subject:* Re: [SR-Users] Unquoted values from #!defenv

         

        The current behaviour targets the use of existing values
        from the environment variables. If you need other kind of
        features, you can propose pull requests. Or you can
        eventually have a start script that sets defines with -A
        cli parameter based on env variables.

        Cheers,
        Daniel

        On 06.12.21 21:56, Ben Kaufman wrote:

            Thank you :)

             

            A follow up question would be on the usability of the
            #!defenv (and probably #!defenvs) usability with
            #!ifdef.  In the scenario below, if the environmental
            variable WITH_DEBUGGER is not defined, then Kamailio
            will fail to start, thus the #!ifdef is somewhat
            limited.  It makes sense for scenarios where someone
            might toggle the setting editing the config file, but
            it would be very convenient to toggle the
            environmental variable instead, particularly in
            containerized environments.   Any thoughts on how best
            to control this?

             

            #!defenv WITH_DEBUGGER

             

            #!ifdef WITH_DEBUGGER

            loadmodule "debugger"

            . . .

            #!endif

             

             

             

             

            *Ben Kaufman*


             

            *From:* Daniel-Constantin Mierla <miconda@gmail.com>
            <mailto:miconda@gmail.com>
            *Sent:* Monday, December 6, 2021 3:55 AM
            *To:* Kamailio (SER) - Users Mailing List
            <sr-users@lists.kamailio.org>
            <mailto:sr-users@lists.kamailio.org>; Ben Kaufman
            <bkaufman@nexvortex.com> <mailto:bkaufman@nexvortex.com>
            *Subject:* Re: [SR-Users] Unquoted values from #!defenv

             

            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
            <https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.kamailio.org%2Fwiki%2Fcookbooks%2Fdevel%2Fcore%23defenvs&data=04%7C01%7Cbkaufman%40bcmone.com%7Cd99fd09975ff46f9a2a808d9bb358e16%7Cafc1818e7b6848568913201b9396c4fc%7C1%7C0%7C637746660990886102%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=rzHyN6OflNNZgm1%2BnXypY01FK1VzlvMnQlOLrWJKOsQ%3D&reserved=0>

            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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Ben Kaufman

6:39 p.m.

...

it is empty string followed by token 'bar' and followed by another empty string.

OK. It makes perfect sense when viewed that way.

Ben Kaufman Sr. VoIP Engineer P: E: bkaufman@bcmone.commailto:bkaufman@bcmone.com 24 hour client support: 855.639.6300tel:+18556396300

From: Daniel-Constantin Mierla miconda@gmail.com Sent: Thursday, December 9, 2021 12:37 PM To: Ben Kaufman bkaufman@bcmone.com; Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org Subject: Re: [SR-Users] Unquoted values from #!defenv

#!defines are preprocessor directives, think about them like copy+paste and then config interpreter tries to understand the config content.

As one example in the wiki, the value of a define can be even a script snippet -- see the define of IDLOOP:

* https://www.kamailio.org/wiki/cookbooks/5.5.x/core#define https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.kamailio.org%2Fwiki%2Fcookbooks%2F5.5.x%2Fcore%23define&data=04%7C01%7Cbkaufman%40bcmone.com%7C3f07f4924c914761524308d9bb42d9c4%7Cafc1818e7b6848568913201b9396c4fc%7C1%7C0%7C637746718105422679%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=qPKKAp1IGiNlg38WTIaRLlBAjzxSaaCsStnwlEapa2k%3D&reserved=0

Your example fails because it results in copying and surrounding the value with quotes, so the interpreter sees:

""bar""

practically, it is empty string followed by token 'bar' and followed by another empty string.

It is the expected behaviour, similar to what happens in C with #define macros. One must know what sets in the value and use the appropriate pre-processor directive.

Cheers, Daniel On 09.12.21 18:13, Ben Kaufman wrote: Sorry, I noticed the file discrepancy after sending the email. I did make sure to retest with #!defenvs and it does work.

export FOO= ""bar""

and use:

#!defenvs FOO

Kamailio will fail to start. I would expect it to have literal quotes in the string.

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From: Daniel-Constantin Mierla miconda@gmail.com mailto:miconda@gmail.com Sent: Thursday, December 9, 2021 11:02 AM To: Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org mailto:sr-users@lists.kamailio.org; Ben Kaufman bkaufman@bcmone.com mailto:bkaufman@bcmone.com Subject: Re: [SR-Users] Unquoted values from #!defenv

The example snippet you gave is with #!devenv, not with #!devenvs. Is it what you tested in this case?

Cheers, Daniel On 09.12.21 15:57, Ben Kaufman wrote: Thank you. It's tested and working with this simple config:

#!KAMAILIO

loadmodule "xlog" loadmodule "pv" loadmodule "evrexec"

modparam("evrexec", "exec", "name=evrexec:timer;wait=1000;workers=1;")

c HOME

request_route{ forward(); }

event_route[evrexec:timer] { xlog("L_N", "HOME: " + HOME + "\n"); }

Regards,

Kaufman

I pushed the code to enclose the value in between quotes. Can you test and see if works now?

Cheers, Daniel On 08.12.21 19:07, Daniel-Constantin Mierla wrote:

I expected the quoted mode parameter does the work -- I will check and push the update.

Cheers, Daniel On 08.12.21 17:17, Ben Kaufman wrote: Daniel,

Ben Kaufman

Cheers, Daniel On 06.12.21 21:56, Ben Kaufman wrote: Thank you :)

#!defenv WITH_DEBUGGER

#!ifdef WITH_DEBUGGER loadmodule "debugger" . . . #!endif

Ben Kaufman

Hello,

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 https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.kamailio.org%2Fwiki%2Fcookbooks%2Fdevel%2Fcore%23defenvs&data=04%7C01%7Cbkaufman%40bcmone.com%7C3f07f4924c914761524308d9bb42d9c4%7Cafc1818e7b6848568913201b9396c4fc%7C1%7C0%7C637746718105432633%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=kPoQi1FAAtKdJ6p4hFKMzns0j3L245foom2qvyYQ5cg%3D&reserved=0

Cheers, Daniel On 30.11.21 22:40, Ben Kaufman wrote: Hello all,

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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Kamailio Advanced Training - Online

Feb 21-24, 2022 (America Timezone)

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Ben Kaufman

9:27 p.m.

And hindsight is always 20/20. The initial question was about this:

!!defenv HOME

. . .

event_route[evrexec:timer] { xlog("L_N", "HOME: " + HOME + "\n"); }

$def(HOME) would work.

Ben Kaufman Sr. VoIP Engineer P: E: bkaufman@bcmone.commailto:bkaufman@bcmone.com 24 hour client support: 855.639.6300tel:+18556396300

#!defines are preprocessor directives, think about them like copy+paste and then config interpreter tries to understand the config content.

As one example in the wiki, the value of a define can be even a script snippet -- see the define of IDLOOP:

Your example fails because it results in copying and surrounding the value with quotes, so the interpreter sees:

""bar""

practically, it is empty string followed by token 'bar' and followed by another empty string.

It is the expected behaviour, similar to what happens in C with #define macros. One must know what sets in the value and use the appropriate pre-processor directive.

Cheers, Daniel On 09.12.21 18:13, Ben Kaufman wrote: Sorry, I noticed the file discrepancy after sending the email. I did make sure to retest with #!defenvs and it does work.

export FOO= ""bar""

and use:

#!defenvs FOO

Kamailio will fail to start. I would expect it to have literal quotes in the string.

Ben Kaufman Sr. VoIP Engineer P: E: bkaufman@bcmone.commailto:bkaufman@bcmone.com 24 hour client support: 855.639.6300tel:+18556396300

The example snippet you gave is with #!devenv, not with #!devenvs. Is it what you tested in this case?

Cheers, Daniel On 09.12.21 15:57, Ben Kaufman wrote: Thank you. It's tested and working with this simple config:

#!KAMAILIO

loadmodule "xlog" loadmodule "pv" loadmodule "evrexec"

modparam("evrexec", "exec", "name=evrexec:timer;wait=1000;workers=1;")

c HOME

request_route{ forward(); }

event_route[evrexec:timer] { xlog("L_N", "HOME: " + HOME + "\n"); }

Regards,

Kaufman

I pushed the code to enclose the value in between quotes. Can you test and see if works now?

Cheers, Daniel On 08.12.21 19:07, Daniel-Constantin Mierla wrote:

I expected the quoted mode parameter does the work -- I will check and push the update.

Cheers, Daniel On 08.12.21 17:17, Ben Kaufman wrote: Daniel,

Ben Kaufman

Cheers, Daniel On 06.12.21 21:56, Ben Kaufman wrote: Thank you :)

#!defenv WITH_DEBUGGER

#!ifdef WITH_DEBUGGER loadmodule "debugger" . . . #!endif

Ben Kaufman

Hello,

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:

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Cheers, Daniel On 30.11.21 22:40, Ben Kaufman wrote: Hello all,

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