Yes am executing as root. This is what I do (& the results) after the device boots up at the command line(through the terminal)
$ ls /sys/class/leds green battery-led lcd-backlight keyboard-backlight $ $ $ $ echo 1 > /sys/class/leds/keyboard-backlight/brightness cannot create /sys/class/leds/keyboard-backlight/brightness: permission denied $ $ echo 1 > /sys/class/leds/green/brightness cannot create /sys/class/leds/green/brightness: permission denied I understand that by default device will boot up in root permission. In the init.rc I see that the devices are "chown"ed to system system >>>>chown system system /sys/class/leds/keyboard-backlight/brightness So I am trying to understand this part of the world and how to get things done. Any information or links will be highly appreicated. Thanks and Regards, ARVR. On Nov 15, 2:09 am, Earlence <[email protected]> wrote: > are you executing this as root? > > -earlence > > On Nov 14, 2:47 pm, arvr <[email protected]> wrote: > > > Hi, > > > I am trying to access leds from command line (through the terminal), > > but I am getting "Permission Denied" error and am struck on similar > > issues.Can you please help me to understand what's wrong. > > > Environment: > > a. OMAP 4430 Panda board > > b. Linux 2.6.36 and Android GB 2.3.3 > > c. I have integrated the leds and it is visible to me as "/sys/class/ > > leds/green/" & "/sys/class/leds/keyboard-backlight". > > > When I perform, > > echo 1 > /sys/class/leds/green/brightness > > or > > echo 1 > /sys/class/leds/keyboard-backlight/brightness > > > kernel tells me "Permission Denied". I use the regular init.rc file as > > given in the OMAPPedia website, with the changes done by commenting > > the line "#mount rootfs rootfs / rw remount" etc. > > > Similar to this, I am executing the "yavta" tool > > (https://www.gitorious.org/omap4-v4l2-camera/yavta) and that too is not > > executing the command, kernel reports me that no such file or folder > > is present. The tool is copied in the same folder and I run it as > > yavta -h > > > What could be reasons? Please help me out. > > Thanks, > > ARVR. > > -- unsubscribe: [email protected] website: http://groups.google.com/group/android-kernel
