On Sat, 26 Jun 2010, Mulyadi Santosa wrote: > Hi... > > On Sat, Jun 26, 2010 at 07:35, Brian Paterni <bpaterni@xxxxxxxxx> wrote: > > What I'm wondering though, is how production drivers handle the > > creation of these special /dev/* files? "Real" kernel drivers do > > not depend on specialized scripts to handle this, or do they? I've > > grepped through my entire /etc directory and only found a few > > references to mknod in the checkroot, sysklogd, and mountall init > > scripts. Likewise, there are only few references to the mknod > > syscall in Linux's /drivers directory. > > I'm truly sucks at this area, but perhaps you need to read about > udev and hotplug. yup, that's pretty much right -- you want to read about "udev", but the "hotplug" facility itself is sort of outdated. in terms of learning about udev, what is considered the canonical piece of documentation is this: http://www.reactivated.net/writing_udev_rules.html but that's already out of date since udev has been refactored, and all the references to commands like udevtrigger and so on should be replaced by the catch-all "udevadm" utility. and at the risk of sounding repetitive (and i truly hate doing that), knowing how udev works and how to create the special device files that correspond to drivers is pretty essential stuff so (you guessed it) i'll be writing a lesson on this for my kernel programming course. if you just want to handle this manually, there's a good explanation in the aforementioned LDD3 book (http://lwn.net/Kernel/LDD3/), which shows how one manually creates the dev files after loading the kernel module. that's explained in LDD3, around p. 47, in chapter 3. hope that helps. rday -- ======================================================================== Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ======================================================================== -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
