[HELP] writting to sensors sysfs
- Thread starter frapeti
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what I found so far:
echoing numbers: $? = 0 (normal exit value)
echoing letters: $? = 1 (error exit value)
dmesg while samsung service writes to it:
echoing numbers: $? = 0 (normal exit value)
echoing letters: $? = 1 (error exit value)
dmesg while samsung service writes to it:
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Anything that comes up in a dmesg is the kernel writing to it. So I don't think you'll be able to write to it unless you mod the kernel somehow
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Of course kernel manage it but that's why sysfs exists, to communicate between userspace and kernel
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Your best bet would be to do what Broodplank recommended. Write a c lib file, include it in your assets folder then using root copy it to the system/bin directory then use a Runtime in your app to execute the file. I know sysfs allows you to communicate but sometimes certain files cannot be accessed because they are not really a file but an object.
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1You can write apps in c code instead of Java and they will run on android!?
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Well not as an apk, but as a binary, like everything in system/bin and xbin. like this: https://github.com/broodplank/android_external_s4utils/blob/master/s4utils.c please note that that is my first c script ever made without any tutorial, so I know, its really poor! anyways, since sensor service has permission to write to it, why shouldn't a custom binary also have that with the right permissions set.
ok sorry I wont spam your topic anymore, I just dont know how to read the usage from that code. :silly:
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