Name
comedi_get_read_subdevice — find streaming input subdevice
Synopsis
#include <comedilib.h>
| int comedi_get_read_subdevice( | comedi_t * device ); | 
 
      Description
    
The function comedi_get_read_subdevice returns the
index of the subdevice
whose streaming input buffer is currently accessible through the
device device, if there is one.
    
      Return value
    
On success, comedi_get_read_subdevicereturns the index
of the current “read” subdevice if there is one,
or -1 if there is no “read” subdevice.
On failure, -1 is returned.