On Wed, Jul 22, 2009 at 9:46 PM, SandeepKsinha<sandeepksinha@xxxxxxxxx> wrote: > Hi Krushnal, > > > On Wed, Jul 22, 2009 at 8:40 PM, Mulyadi Santosa <mulyadi.santosa@xxxxxxxxx> > wrote: >> >> Hi... >> >> I hope you don't mind if I cc my reply to kernelnewbies mailing list >> too...so that you can get more response.. >> >> On Wed, Jul 22, 2009 at 4:03 PM, krushnaal pai<krisonearth@xxxxxxxxx> >> wrote: >> > sir, >> > how can we send data from kernel space to user application....... >> >> AFAIK, most people use netlink socket. But since it seems that you >> want alternative ways.... >> >> > also i had an article on that but they have used sockets ,i want one >> > that >> > doesnt use sockets >> >> if you mean "send data" as "user space read data from kernel space by >> polling certain file descriptor", then you can create /proc or /sys or >> debugfs entries, assign the file operation in it. Then when a user >> space program read the entry, kernel simply send the data to the >> reader. sysfs is a good option but here you have limitation of transecting 4k at a time. On the other hand using ioctl you can transfer more than this. I am not aware of limitations of /proc or debugfs. Another issue with sysfs is related to getting the completion status of your command. I mean you will not be aware whether your command completed successfully or it has failed due to some error. > > > If you are just looking for alternatives, ioctl is the simplest one. Google > for configfs, thats a good one too. > > >> >> -- >> regards, >> >> Mulyadi Santosa >> Freelance Linux trainer >> blog: the-hydra.blogspot.com >> >> -- >> To unsubscribe from this list: send an email with >> "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx >> Please read the FAQ at http://kernelnewbies.org/FAQ >> > > -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
