How to write to a file in the Directory "/sys/....."

Question

How can i edit the file in the sys directory using JNI and NDk in android. Actually i Need to edit these file "/sys/class/gpio/gpio41/value".

NDK or not, this is not doable on a non-rooted device. Once the device is rooted, however, it's regular file I/O. Are you stuck on the latter? — Seva Alekseyev, Feb 15 '13 at 02:14
@SevaAlekseyev By changing the mode I can nw edit the file using: chmod 777 /sys/class/gpio/gpio41/value — user1925921, Feb 15 '13 at 05:11
OK, so what's your question now? By the way, when the situation changes, it's better to edit the question rather than write comments. — Seva Alekseyev, Feb 18 '13 at 17:37

score 0 · Answer 1 · answered Feb 22 '13 at 23:30

0

just a little hint: use chmod 666 ... You will get read/write permission but you don't need execute permission on HW-pins.

Regards Martin

answered Feb 22 '13 at 23:30

score 0 · Accepted Answer · edited Feb 27 '13 at 07:11

0

By changing the mode you can now edit the file using: chmod 777 /sys/class/gpio/gpio41/value

edited Feb 27 '13 at 07:11

Rune FS

answered Feb 27 '13 at 07:06

vinu

2 Answers2