+Dianne's reply., apt solution to overcome privilege issues ---------- Forwarded message ---------- From: Dianne Hackborn <[email protected]> Date: Wed, May 16, 2012 at 9:47 PM Subject: Re: [android-porting] Why the android applications doesn't have permissions to send ioctls to network drivers directly?Is there any way to solve this problem? To: [email protected]
On Wed, May 16, 2012 at 6:39 AM, Devaraj Rangasamy <[email protected]> wrote: > access previleges is missing for application (user mode), while its > available for c appliation (which would've launched from console, which is > running as root) Note this is unrelated to C, but just the uid that the code is running under. If your code is running as root, it of course gets access to everything; but very very little in Android runs as root, and you want to think a hard second and third time about anything you add that runs as root. Generally the correct design is to associate a group id with the device that can be handled only to the specific uids that need to access to it. -- Dianne Hackborn Android framework engineer [email protected] Note: please don't send private questions to me, as I don't have time to provide private support, and so won't reply to such e-mails. All such questions should be posted on public forums, where I and others can see and answer them. On Wed, May 16, 2012 at 7:09 PM, Devaraj Rangasamy <[email protected]>wrote: > > >>The issue now is we were able to send ioctls to driver and execute them > with a c test application.But when the same API's being used by android > application it gives an error as "OPERATION NOT PERMITTED". > access previleges is missing for application (user mode), while its > available for c appliation (which would've launched from console, which is > running as root) > > i'm not sure what you meant by "same api's being used by android > application"., ideally ioctl's would be invoked from native code, & api's > will be exposed to android apps via JNI., > if thats the case, make sure your device permissions are set right in > init.rc, so you will have right access previlege from application too., > "chmod 777 /dev/mychardev" > > > On Mon, May 7, 2012 at 9:32 PM, reddy <[email protected]> wrote: > >> hi,i am a system programmer i am not aware of android application >> development and their permissions.Recently we have developed a sniffer and >> packet injector.The issue now is we were able to send ioctls to driver and >> execute them with a c test application.But when the same API's being used >> by android application it gives an error as "OPERATION NOT PERMITTED".I am >> confused as i was able to send ioctls to Chardriver and why not to wifi >> driver.i can call the test application through android application but it >> is bit complex and passing parameters and buffers to it is diffult and >> cumbersome.Is thereany way to resolve this or it is a restriction for >> android apps.if that is true how does the default wifi application is able >> to send commands to driver? If any one faced this issue please post the >> clues to resolve it.. >> >> -- >> unsubscribe: [email protected] >> website: http://groups.google.com/group/android-porting >> > > > > -- > Regards, > Deva > www.bittoggler.com > > -- Regards, Deva www.bittoggler.com -- unsubscribe: [email protected] website: http://groups.google.com/group/android-porting
