Reading the Data

The read(9E) entry point first calls the getminor(9F) function to retrieve the minor number of the device. The read(9E) entry point uses this instance number to call the ddi_get_soft_state(9F) function to retrieve the state structure for this device instance. If no state structure is retrieved, read(9E) returns an error code. If a state structure is retrieved, read(9E) calls the uiomove(9F) function to copy the quotation from the driver to the uio(9S) I/O request structure.