Can android NDK open uart port without root?

[jason]

Hi,

I have a problem.

My app uses Android NDK to open uart port.

the NDK code is :

fd = open("/dev/ttys1", O_RDWR | O_NOCTTY | O_NONBLOCK);

but fd will return -1

I check /dev/ttyS1 permission is : crw-rw-----

If I use root to chmod 666 /dev/ttyS1

fd will return > 0 , and uart port can be opened

Can I use Android NDK to open uart port without root to chmod ?

Thanks~

[Glenn Kasten]

NDK does not provide any different permissions than SDK.