G'Day Daniel! On 6/17/05, Daniel O'Connor <[EMAIL PROTECTED]> wrote: > On Fri, 17 Jun 2005 21:36, Hannes Mayer wrote: > > To cut a long story short, how can I open a FIFO in kernel space and > > write to it, so I can open and read from it in userspace ? > > Why don't you create a device node? > > If you read and write to it, it acts like a FIFO.
Thanks for your reply! :-) Well, the reason why I want to use a true FIFO is, that data is sampled i.e. every second and I want to write it to disk in userspace only every minute or so. So if I add a ".d_ioctl" to "struct cdevsw" for the device node, I have to make a function in the kernel module for handling the userspace read request and I have to cache the sampled data in the kernel module. I want the module to be flexible, so if I don't sample at a fixed frequency (i.e. event counting) I don't know how much data is coming in in a certain time interval and with a FIFO I don't have to care about the data-cache size. Thanks again & best regards, Hannes. _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
