[maemo-developers] DSME code?

[From: Jesse Guardiani]

Austin Che wrote:
>> On Fri, Sep 14, 2007 at 12:39:18PM -0400, ext Jesse Guardiani wrote:
>>     
>>> I'd personally love to see DSME open sourced.
>>>       
>> Oh, me too.  Nothing I've said on this list should indicate otherwise.
>>
>>     
>>> In particular, there are 
>>> screen ON/OFF/Notify
>>> events that it sends/receives via dbus that I'd love to extend. For 
>>> example, I've got a DSME
>>> related ticket that I'd like to close using dbus, but that probably 
>>> isn't possible with DSME as-is:
>>>  https://www.guardiani.us/projects/kagu/ticket/52
>>>       
>> You can just bypass DSME and deal with omapfb directly: see
>> asm-arm/arch-omap/omapfb.h.  Note that DSME does this every 1s or so, so
>> you're in a godawful race, so you might just have to nuke the blanking
>> plugin or something.
>>     
>
>     Jesse,
>     
>     I had previously looked at blanking the screen and figured out how
>     to do it (not using dbus however) and there's no race with
>     DSME. It stays off until the touchscreen or key is pressed. Here's
>     code that'll blank the screen:
>     
> #include <fcntl.h>
> #include <sys/ioctl.h>
> #include <linux/fb.h>
> int main(int argc, char **argv) 
> {
>     int fb = open("/dev/fb0", O_NONBLOCK);
>     if (fb < 0) perror("Error opening /dev/fb0");
>     if (ioctl(fb, FBIOBLANK, VESA_POWERDOWN) < 0) perror("Blanking error");
>     close(fb);
> }
>   

But that's run as root, right? I need to be able to blank from userspace 
without root as a normal user.

-- 
Jesse Guardiani
Programmer/Sys Admin
jesse at guardiani.us