EmbLogic's Blog

How to Write a Writer Routine.

In the char driver We write the Write Routine.  This write routine is mapped in struct file operations . We use copy_from_user macro. this macro has three arguments. first is void* to second is const  void* __user form and last argument is how many char  have to write.

first malloc the sqset then malloc sqset->data and at last create qsetarray. Then malloc qsetarry member one by one and write the data by using copy_from_user macro.





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