Hi, On 3/11/07, Tzahi Fadida <Tzahi.ML2@xxxxxxxxx> wrote:
On Sunday 11 March 2007 17:47, Ramagudi Naziir wrote: > Hello. > > Do anyone have an idea how to send a notifier to a user space application ? > > I can do char device or socket, and let the user poll it, but it feels > like an overkill.. I am just a newbie here, but isn't writing a kernel space code an overkill too for something that you consider just opening a unix socket is an overkill?
But I live in the kernel. I have some kernel event that I must notify about to the application. and the overkill I talk about is the kernel-side. of course that opening a socket is easy, but in the kernel I need to write the code to serve it (look for NETLINK sockets for more info).
> What about signals ? is it reliable ? And how would you know what to signal. I think that usually you open a char device and wait/non-block read write. Perhaps you can use ioctl to tell the driver you are interested in a signal, but, you have to write the driver which is an overkill? :)
I am writing the driver. this is a precondition. now the only question is how will it notify a specific user application about some event (for more info - i have some GPIO interrupt I need to report about). for signals i need to know the pid of the application, which is a drawback, so i guess it is not an option. Thanks, naziir.
> I wish there was a user-space form of the notifiers mechanism... > > Thank You > naziir > > -- > To unsubscribe from this list: send an email with > "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx > Please read the FAQ at http://kernelnewbies.org/FAQ -- Regards, Tzahi. -- Tzahi Fadida Blog: http://tzahi.blogsite.org | Home Site: http://tzahi.webhop.info WARNING TO SPAMMERS: see at http://members.lycos.co.uk/my2nis/spamwarning.html
-- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
