<snip> > If Interpretation of commands must be same in > user space and kernel > space and if we r using these macros and > dynamically allocating > value,then how user space will know this..(these > macros can't be used in user space know) These macros may be used in user space. IO controls are the glue (or would that be duct tape?) between user and kernel space so the control codes must be representable in both. (Try including <sys/ioctl.h> in your user-space code.) One more thing, are you sure you need to use dynamic IO control codes? I don't know what you're trying to do, but it would seem easier to have a single, static IO control and then alter behavior/state based on its parameters. -Mike DeKoker ____________________________________________________ Start your day with Yahoo! - make it your home page http://www.yahoo.com/r/hs -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
