Android application in java having permission issues when accessing sysfs
entry.
try{
FileOutputStream fos = new
FileOutputStream("/sys/class/shift_reg/shift_reg/value");
byte mybyte = 1;
fos.write(mybyte);
fos.close();} catch ( Exception e) {
Log.d(TAG, "Failed in writing to Shift Register"); <------- I am always
getting this exception.}
1) Have tried putting 'setenforce 0'. Does't work. Even though enforce
level is permissive.
2) Do I have to access using JNI way: ( android-app -> jni -> driver )
3) I have set file permission as 0777 for the sysfs node file.
Dmesg Error message:
[ 417.176302] type=1400 audit(418.589:63): avc: denied { write } for
pid=3164 comm="com.android.cam" name="value" dev="sysfs" ino=9749
scontext=u:r:untrusted_app:s0 tcontext=u:object_r:sysfs:s0 tclass=file
permissive=1
ps -Z
u:r:untrusted_app:s0 u0_a67 4360 333
com.android.cam
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