Tomas Almeida wrote:
Tomas,Hello everybody
I'm reading the "Linux Device Drivers" (Alessandro Rubini), and i'm in chapter that we learn to build a char driver. I'm necesarilly at the point where he argues about dynamical allocation of major numbers but i have one doubt (for the moment), if i use the dynamical allocation, its because i dont have a one major number exclusive of my char driver and then.. who will make the device nodes to my char driver?! I have to guide my driver to print the major number that it found dynamically and then make the nodes manually?
Forgive eventual english mistakes..
Atenciosamente, thr~~
Your english is fine. :) When registering your driver if you pass 0 as the argument of the major number, then the driver will be assigned a dynamic major number. You can then write a script to make the device nodes for the given dynamic major number. An example script for making device nodes can be seen here: http://www.xml.com/ldd/chapter/book/ch03.html#t2
under "Dynamic Allocation of Major Numbers".
-Bill
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