Using the pass-through library interface

The pass-through library interface (libsdi.so) is documented on the following manual pages:

• pt_open

• pt_send

• pt_close

These three function calls replace the functionality provided in releases of SVR5 prior to Release 7.1, and documented in ``Using the pass-through ioctl interface''. New drivers written for Release 7.1 should be written using the library interface rather than the ioctl interface.