Function - Read a sequence of bytes "inband" from a device object.
#include<device/device.h>
kern_return_t device_read_inband
(mach_port_t device,
dev_mode_t mode,
recnum_t recnum,
io_buf_len_t bytes_wanted,
io_buf_ptr_inband_t data,
mach_msg_type_number_t *data_count);
#include<device/device_request.h>
kern_return_t device_read_request_inband
(mach_port_t device,
mach_port_t reply_port,
dev_mode_t mode,
recnum_t recnum,
io_buf_len_t bytes_wanted);
kern_return_t ds_device_read_reply_inband
(mach_port_t reply_port,
kern_return_t return_code,
io_buf_ptr_inband_t data,
mach_msg_type_number_t data_count);
The device_read_inband function reads a sequence of bytes from a device object. The meaning of recnum as well as the specific operation performed is device dependent. This call differs from device_read in that the returned bytes are returned "inband" in the reply IPC message.
Only generic errors apply.
Functions: device_read, device_read_overwrite, device_reply_server.