ACPI+Userspace

DISCUSSION Jeremy Moles 1 participant 4 messages Jun 13, 2005 – Jun 19, 2005 ACPI

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Jeremy Moles

author

2005-06-13 23:37 UTC #0 lore raw

Hello all--quick question.

As bad as it may seem, I was wondering if it is possible to generate ACPI events in userspace? That is: propogate any arbitrary "string" up through the ACPI subsystem, eventually getting dumped
to /proc/acpi/event which, in our case, is being watched and acted on by the userspace util ACPID.

The obvious answer is: "Call /etc/acpi/hander with your string!"--which is always an option--but I'd like to know if it's possible simply to use for testing/debugging. I could write a driver supporting ioctls to pass stuff via acpi_bus_generate_event (I think?), but that's wayyy too much work for what I'm wanting this for. I'm sure there are reasons this isn't a good idea, and I'd be glad to hear those too (to increase my understanding of ACPI!).

Anyway--thanks ahead of time. Weee.

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Jeremy Moles

author

2005-06-19 18:05 UTC #1 lore raw

Well, spent some time Friday night and went ahead and did it. README included, along with some stuff in the source which may/may not be correct. :/ In particular, the sscanf may be hackish... I do mostly C++ and python code, so I'm not that good C string stuff. All comments are welcome.

P.S. The Makefile has "make in" and "make out" targets. Any OS that lets you type "make out" at a commandline--and then do something interesting--is just fine by me. :)

Quoted 20 lines · Jeremy Moles

Hello all--quick question.
As bad as it may seem, I was wondering if it is possible to generate ACPI events in userspace? That is: propogate any arbitrary "string" up through the ACPI subsystem, eventually getting dumped
to /proc/acpi/event which, in our case, is being watched and acted on by the userspace util ACPID.
The obvious answer is: "Call /etc/acpi/hander with your string!"--which is always an option--but I'd like to know if it's possible simply to use for testing/debugging. I could write a driver supporting ioctls to pass stuff via acpi_bus_generate_event (I think?), but that's wayyy too much work for what I'm wanting this for. I'm sure there are reasons this isn't a good idea, and I'd be glad to hear those too (to increase my understanding of ACPI!).
Anyway--thanks ahead of time. Weee.

Quoted 9 lines

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_______________________________________________
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Jeremy Moles

author

2005-06-19 18:08 UTC #2 lore raw

Here's the package.

Quoted 52 lines · Jeremy Moles

Well, spent some time Friday night and went ahead and did it. README included, along with some stuff in the source which may/may not be correct. :/ In particular, the sscanf may be hackish... I do mostly C++ and python code, so I'm not that good C string stuff. All comments are welcome.
P.S. The Makefile has "make in" and "make out" targets. Any OS that lets you type "make out" at a commandline--and then do something interesting--is just fine by me. :)
Quoted 20 lines · Jeremy Moles
Hello all--quick question.
As bad as it may seem, I was wondering if it is possible to generate ACPI events in userspace? That is: propogate any arbitrary "string" up through the ACPI subsystem, eventually getting dumped
to /proc/acpi/event which, in our case, is being watched and acted on by the userspace util ACPID.
The obvious answer is: "Call /etc/acpi/hander with your string!"--which is always an option--but I'd like to know if it's possible simply to use for testing/debugging. I could write a driver supporting ioctls to pass stuff via acpi_bus_generate_event (I think?), but that's wayyy too much work for what I'm wanting this for. I'm sure there are reasons this isn't a good idea, and I'd be glad to hear those too (to increase my understanding of ACPI!).
Anyway--thanks ahead of time. Weee.
Quoted 9 lines
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This SF.Net email is sponsored by: NEC IT Guy Games. How far can you shotput a projector? How fast can you ride your desk chair down the office luge track? If you want to score the big prize, get to know the little guy. Play to win an NEC 61" plasma display: http://www.necitguy.com/?r=20
_______________________________________________
Acpi-devel mailing list [email protected]
https://lists.sourceforge.net/lists/listinfo/acpi-devel
-------------------------------------------------------
SF.Net email is sponsored by: Discover Easy Linux Migration Strategies from IBM. Find simple to follow Roadmaps, straightforward articles, informative Webcasts and more! Get everything you need to get up to speed, fast. http://ads.osdn.com/?ad_id=7477&alloc_id=16492&op=click
_______________________________________________
Acpi-devel mailing list [email protected]
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Jeremy Moles

author

2005-06-19 18:19 UTC #3 lore raw

Last thing (not trying to spam), here's a simple usage summation:

1. make
2. make install
3. modprobe acpievgen
3. echo "devicename BUSID 1 2" > /proc/acpi/evgen

The event comes back up through the event interface to be parsed by whatever. The echo doesn't have to be exactly an ACPI event string, but the arguments get assigned positionally, delimited by spaces.

Quoted 55 lines · Jeremy Moles

Here's the package.
Quoted 52 lines · Jeremy Moles
Well, spent some time Friday night and went ahead and did it. README included, along with some stuff in the source which may/may not be correct. :/ In particular, the sscanf may be hackish... I do mostly C++ and python code, so I'm not that good C string stuff. All comments are welcome.
P.S. The Makefile has "make in" and "make out" targets. Any OS that lets you type "make out" at a commandline--and then do something interesting--is just fine by me. :)
Quoted 20 lines · Jeremy Moles
Hello all--quick question.
As bad as it may seem, I was wondering if it is possible to generate ACPI events in userspace? That is: propogate any arbitrary "string" up through the ACPI subsystem, eventually getting dumped
to /proc/acpi/event which, in our case, is being watched and acted on by the userspace util ACPID.
The obvious answer is: "Call /etc/acpi/hander with your string!"--which is always an option--but I'd like to know if it's possible simply to use for testing/debugging. I could write a driver supporting ioctls to pass stuff via acpi_bus_generate_event (I think?), but that's wayyy too much work for what I'm wanting this for. I'm sure there are reasons this isn't a good idea, and I'd be glad to hear those too (to increase my understanding of ACPI!).
Anyway--thanks ahead of time. Weee.
Quoted 9 lines
-------------------------------------------------------
This SF.Net email is sponsored by: NEC IT Guy Games. How far can you shotput a projector? How fast can you ride your desk chair down the office luge track? If you want to score the big prize, get to know the little guy. Play to win an NEC 61" plasma display: http://www.necitguy.com/?r=20
_______________________________________________
Acpi-devel mailing list [email protected]
https://lists.sourceforge.net/lists/listinfo/acpi-devel
-------------------------------------------------------
SF.Net email is sponsored by: Discover Easy Linux Migration Strategies from IBM. Find simple to follow Roadmaps, straightforward articles, informative Webcasts and more! Get everything you need to get up to speed, fast. http://ads.osdn.com/?ad_id=7477&alloc_id=16492&op=click
_______________________________________________
Acpi-devel mailing list [email protected]
https://lists.sourceforge.net/lists/listinfo/acpi-devel