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Re: trying to build configd, understanding dns more
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Re: trying to build configd, understanding dns more

  • Subject: Re: trying to build configd, understanding dns more
  • From: marty leisner <email@hidden>
  • Date: Mon, 30 Mar 2015 10:07:11 -0400
I wanted to build scutil so I can modify it and look at it in the debugger.

Seems there are a lot of "header" files which I don't have -- and I don't see instructions or "download a build system" and build in pieces (i.e. kde/gnome)

When I try to build launchd I get the undefined TargetConfig.h

When I try to build configd I get an undefined ne_session.h (is this in neon?)

When I make an "empty" ne_session.h I need: vproc_priv.h (which is in launchd)
Are there instructions missing for "how to build" these programs (I've only been building unix code for 30+ years) [I haven't seen it]

marty



On Mon, Mar 30, 2015 at 4:05 AM, Quinn "The Eskimo!" <email@hidden> wrote:

On 27 Mar 2015, at 20:44, marty leisner <email@hidden> wrote:

> I want to understand more about what scutil --dns does.
>
> Since I have the source, I thought I could easily build it (my mistake).

Yeah, my experience is that Darwin source rarely builds easily.

It's still a useful tool though.  In this case of --dns, it calls an internal routine, dns_configuration_copy:

<http://www.opensource.apple.com/source/configd/configd-699.1.5/dnsinfo/dnsinfo_copy.c>

which XPCs over to a configd-side routine, _dnsinfo_copy:

<http://www.opensource.apple.com/source/configd/configd-699.1.5/dnsinfo/dnsinfo_server.c>

which calls _libSC_info_server_get_data to get the data:

<http://www.opensource.apple.com/source/configd/configd-699.1.5/libSystemConfiguration/libSystemConfiguration_server.c>

It seems that the DNS data is set by a call to _libSC_info_server_set_data in _dns_configuration_store:

<http://www.opensource.apple.com/source/configd/configd-699.1.5/dnsinfo/dnsinfo_server.c>

which, in turn, is called by dns_configuration_set in the IPMonitor plug-in, where the actual logic lies.

<http://www.opensource.apple.com/source/configd/configd-699.1.5/Plugins/IPMonitor/dns-configuration.c>

Have fun (-:

Share and Enjoy
--
Quinn "The Eskimo!"                    <http://www.apple.com/developer/>
Apple Developer Relations, Developer Technical Support, Core OS/Hardware



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References: 
 >trying to build configd, understanding dns more (From: marty leisner <email@hidden>)
 >Re: trying to build configd, understanding dns more (From: "Quinn \"The Eskimo!\"" <email@hidden>)

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