Creating /dev/* special files

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Hi, I've been reading through Linux Device Drivers over the summer to try and
get familiar with programming device drivers. I'm at the point in chapter 3
where it hands you two little scripts, namely scull_load and scull_unload, which
handle driver loading/unloading, creating /dev/* nodes (via mknod), and changing
permissions on those nodes.

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. 

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