[Freeswitch-users] Trying to get short hostname

[Avi Marcus]

System doesn't listen to stdout, it's only for running the command.

On Thu, Oct 28, 2021, 6:22 PM Antony Stone <
Antony.Stone at freeswitch.open.source.it> wrote:

> Hi.
>
> I'm using FreeSwitch 1.10.7 as a client registering to other PBXs as well
> as a
> SIP server itself.
>
> I am setting the user-agent string in the SIP profile, such as:
>
> <param name="user-agent-string" value="FS $${CFGver} $${hostname}"/>
>
> The variable $${CFGver}} is a version string I'm definiing in vars.xml
>
> This is working, but it gives me the FQDN of the machine as $${hostname}}
> and
> I really only want the machine name without the domain.
>
> I've found
> https://freeswitch.org/confluence/display/FREESWITCH/Regular+Expression
> and
> https://freeswitch.org/confluence/display/FREESWITCH/mod_dptools:+regex
> and
> I've tried to use them to cut the domain off the value of $${hostname} but
> with
> no success:
>
> In vars.xml:
> <X-PRE-PROCESS cmd="set"
> data="shorthostname=${regex($${hostname}|([^\.]*).*|
> %1)}"/>
>
> This results in the variable shorthostname being assigned the value:
>         %{regex(abcd.efgh.tld|([^\.]*).*|%1)}
>
> where abcd.efgh.tld is the server's FQDN.
>
> Instead of doing that in vars.xml and creating the variable shorthostname,
> I
> tried putting the regex into the SIP profile:
>
> <param name="user-agent-string" value="FS $${CFGver} ${regex($${hostname}|
> ([^\.]*).*|%1)}"/>
>
> This ends up with precisely the same result.  The ${regex(....)} function
> simply isn't being executed.
>
>
> Given that the machine's hostname is also available from the system
> command
> "hostname -s" I decided to try that instead:
>
> In vars.xml:
> <X-PRE-PROCESS cmd="set" data="shorthostname=${system(hostname -s)}"/>
>
> Or in the SIP profile definition:
> <param name="user-agent-string" value="FS $${CFGver} ${system(hostname
> -s)}"/>
>
> These both produce the output:
>         FS 0.65 ${system(hostname -s)}
>
> In other words, the ${system(....)} command isn't working any more than
> ${regex(....)} did.
>
>
> What am I doing wrong please?
>
>
> How can I get the machine's short hostname into a user-agent string for
> registration to a server?
>
>
> Thanks,
>
>
> Antony.
>
> --
> Perfection in design is achieved not when there is nothing left to add,
> but
> rather when there is nothing left to take away.
>
>  - Antoine de Saint-Exupery
>
>                                                    Please reply to the
> list;
>                                                          please *don't* CC
> me.
>
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