Openlipc

baf · 10-24-2013, 05:22 AM

Being fed up with executing lipc files through exec calls from my c programs I wrote a stub for openlipc.h. A header for liblipc. Now it will be possible to call some lipc functions directly from c programs, like setting some lipc properties, reading them or sending lipc events.
As a POC I also recreated lipc-set-prop, lipc-get-prop and lipc-send-event programs. These are not exact copies, I skipped some params checking, multiple tries to send event, etc. I just wanted to use all the lipc functions in these examples, so that it would be clear how to use them.
You will find source code on my github.

I am also attaching compiled binaries.

aditya3098 · 10-24-2013, 06:11 AM

Lets see... how tough would a python binding be...

hawhill · 10-24-2013, 06:35 AM

That's great, thank you, baf! I think we might steal from that header file for use in KoReader in a LuaJIT FFI binding.

aditya3098 · 10-24-2013, 06:38 AM

Swig rocks. PULL REQUEST AWAY!

aditya3098 · 10-24-2013, 07:00 AM

Again, how the heck do we compile this again? LD complains about not finding -llipc. Do I have to get some other stuff off the kindle? Maybe pull and .so or two?

P.S: I again said again twice, again.

hawhill · 10-24-2013, 07:05 AM

Where are you compiling? Crosscompiling, perhaps? Then you would need to provide the library to your crosscompiler to link against it. When not in a standard library search path of ld, you might need to give the -L parameter to point to the directory where the .so can be found. Note that you might need the .so plus some of the symlinks pointing to it, depending on its SONAME (an ELF file property).

baf · 10-24-2013, 07:30 AM

Quote:

Originally Posted by aditya3098

Again, how the heck do we compile this again? LD complains about not finding -llipc. Do I have to get some other stuff off the kindle? Maybe pull and .so or two?

Sure. liblipc.so

baf · 10-24-2013, 07:31 AM

Quote:

Originally Posted by hawhill

That's great, thank you, baf! I think we might steal from that header file for use in KoReader in a LuaJIT FFI binding.

Great! Hope you will find it useful

silver18 · 10-24-2013, 08:32 AM

It sounds really interesting...I'll check the source asap (I'm a bit busy ATM...).
In the meanwhile....could it be useful for WAFs? Maybe setting up some events before running a WAF than, from inside the WAF, trigger those events...

aditya3098 · 10-24-2013, 12:28 PM

Quote:

Originally Posted by hawhill

Where are you compiling? Crosscompiling, perhaps? Then you would need to provide the library to your crosscompiler to link against it. When not in a standard library search path of ld, you might need to give the -L parameter to point to the directory where the .so can be found. Note that you might need the .so plus some of the symlinks pointing to it, depending on its SONAME (an ELF file property).

From that, i figured:

I need to cross compile the app using a cross compiler and have the .so in the linking step.

Okay. Back to cross compiling.

BTW can I use tcc?

NiLuJe · 10-24-2013, 12:41 PM

Whee! Awesome

.

dsmid · 10-25-2013, 02:04 AM

I wonder what actually is lipc ?
Is it anything more than plain DBus ?

baf · 10-25-2013, 03:21 AM

Quote:

Originally Posted by dsmid

I wonder what actually is lipc ?
Is it anything more than plain DBus ?

Yes. It is mostly d-bus plus glib hash tables protected by mutexes

baf · 10-25-2013, 03:23 AM

Quote:

Originally Posted by silver18

It sounds really interesting...I'll check the source asap (I'm a bit busy ATM...).
In the meanwhile....could it be useful for WAFs? Maybe setting up some events before running a WAF than, from inside the WAF, trigger those events...

This is rather meant as a shortcut for developers writing their programs in c/c++.

baf · 10-25-2013, 03:24 AM

Quote:

Originally Posted by aditya3098

BTW can I use tcc?

I never used tcc. Give it a try

10-24-2013, 06:11 AM	#2
aditya3098 Guru Posts: 608 Karma: 1588610 Join Date: Jan 2012 Device: Kindle Scribe	Lets see... how tough would a python binding be...

10-24-2013, 06:35 AM	#3
hawhill Wizard Posts: 1,379 Karma: 2155307 Join Date: Nov 2010 Location: Goettingen, Germany Device: Kindle Paperwhite, Kobo Mini	That's great, thank you, baf! I think we might steal from that header file for use in KoReader in a LuaJIT FFI binding.

10-24-2013, 06:38 AM	#4
aditya3098 Guru Posts: 608 Karma: 1588610 Join Date: Jan 2012 Device: Kindle Scribe	Swig rocks. PULL REQUEST AWAY!

10-24-2013, 07:00 AM	#5
aditya3098 Guru Posts: 608 Karma: 1588610 Join Date: Jan 2012 Device: Kindle Scribe	Again, how the heck do we compile this again? LD complains about not finding -llipc. Do I have to get some other stuff off the kindle? Maybe pull and .so or two? P.S: I again said again twice, again.

10-24-2013, 07:05 AM	#6
hawhill Wizard Posts: 1,379 Karma: 2155307 Join Date: Nov 2010 Location: Goettingen, Germany Device: Kindle Paperwhite, Kobo Mini	Where are you compiling? Crosscompiling, perhaps? Then you would need to provide the library to your crosscompiler to link against it. When not in a standard library search path of ld, you might need to give the -L parameter to point to the directory where the .so can be found. Note that you might need the .so plus some of the symlinks pointing to it, depending on its SONAME (an ELF file property).

10-24-2013, 08:32 AM	#9
silver18 THE NOOB Posts: 701 Karma: 1545649 Join Date: Jan 2012 Location: Italy Device: Kindle Touch 5.3.2	It sounds really interesting...I'll check the source asap (I'm a bit busy ATM...). In the meanwhile....could it be useful for WAFs? Maybe setting up some events before running a WAF than, from inside the WAF, trigger those events...

10-24-2013, 12:41 PM	#11
NiLuJe BLAM! Posts: 13,477 Karma: 26012494 Join Date: Jun 2010 Location: Paris, France Device: Kindle 2i, 3g, 4, 5w, PW, PW2, PW5; Kobo H2O, Forma, Elipsa, Sage, C2E	Whee! Awesome .

10-25-2013, 02:04 AM	#12
dsmid Linux devotee Posts: 598 Karma: 2069047 Join Date: Feb 2011 Device: Kindle 3, Kindle 4B, Kindle PW2	I wonder what actually is lipc ? Is it anything more than plain DBus ?