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About serialmanager access serial port issue.

Question asked by chris lin on Jan 8, 2019
Latest reply on Feb 10, 2019 by chris lin

I using serialmanager to access serial port in android.  below step:

1. add  /dev/ttymxc1              0660   system     system in fsl/wibo_8mq/ueventd.freescale.rc

2. add /dev/ttymxc1                   u:object_r:serial_device:s0 in fsl/wibo_8mq/sepolicy/file_contexts

3. add allow system_app serial_device:chr_file { getattr open read write ioctl};  in fsl/wibo_8mq/sepolicy/system_app.te

4. move serialchat to package/apps dicectory.

5. add LOCAL_CERTIFICATE := platform in of serialchat dicectory.

6. add android:sharedUserId="android.uid.system" in AndroidManifest.xml of serialchat directory.


But when i run serialchat than console show serialxxxjni can't not open /dev/ttymxc1. I guess not get permission. So i setenforce 0 in console than close and run the apk. The serialchat can access serialport. Have any one can suggestion ?


I guess the apk not get permission from selinux.