Kernel Functions for Drivers                      ldigetdev(9F)



NAME
     ldigetdev, ldigetotyp, ldigetdevid, ldigetminorname
     - Extract information from a layered handle

SYNOPSIS
     #include 

     int ldigetdev(ldihandlet lh, devt *devp);


     int ldigetotyp(ldihandlet lh, int *otyp);


     int ldigetdevid(ldihandlet lh, ddidevidt *devid);


     int ldigetminorname(ldihandlet lh, char **minorname);


PARAMETERS
     lh             Layered handle


     otyp           Indicates on which interface the  driver  was
                    opened. Valid settings are:

                    OTYPBLK    Open device block interface.


                    OTYPCHR    Open device character interface.



     devp           Pointer to a device number.


     devid          Device ID.


     minorname     Minor device node name.


DESCRIPTION
     The ldigetdev() function retrieves  the  devt  associated
     with a layered handle.


     The ldigetotyp() retrieves the open flag that was used  to
     open the device associated with the layered handle.






SunOS 5.11          Last change: 3 June 2003                    1






Kernel Functions for Drivers                      ldigetdev(9F)



     The ldigetdevid() function retrieves a devid for the  dev-
     ice  associated  with the layered handle. The caller  should
     use ddidevidfree() to free the devid when done with it.


     The ldigetminorname() function retrieves the name of  the
     minor node opened for the device associated with the layered
     handle. ldigetminorname() allocates a  buffer  containing
     the minor node name and returns it via the minorname param-
     eter. The caller  should  use  kmemfree()  to  release  the
     buffer when done with it.

RETURN VALUES
     The  ldigetdev(),  ldigetotyp(),  ldigetdevid(),   and
     ldigetdevid() functions return 0 upon success.


     In case of an error, the following values may be returned:

     EINVAL     Invalid input parameters.


     ENOTSUP    The operation is not supported for this device.


CONTEXT
     These functions may be called from user or kernel context.




























SunOS 5.11          Last change: 3 June 2003                    2