NIO CommKit Host Interface Installation and System Administration Manual

6-18

Porting CommKit Applications To Release 4.x

Programmer-Level Compatibility

ioctl(2)

The list of previously supported ioctl calls is given in Table 6-5 with a

statement on the status of each.

Table 6-5 Previously Supported ioctl System Calls and Their Current Status

System Call Status

DKIODIAL

All of the dial function is now provided by the expanded library function

dkitdial. Refer to the dkitdial example later in this chapter and to the dkdial(3X)

manual page.

DKIOCNEW

The announcement of a server name is now provided by the library function

dkmgr.

DKIOCREQ This function is no longer supported. For all outgoing calls, use the dkitdial

library routine. Refer to the dkitdial example later in this chapter and to the

dkdial(3X) manual page.

DKIOCRMODE

This function is no longer supported.

This Set Receiver Mode ioctl was used to select Block Mode or Character Mode

and allowed the application to specify the timeout period for Character Mode

within a 25-millisecond granularity. The Raw Driver Facility receiver mode for

a circuit is selected solely on the basis of the INIT0 or INIT1 control code

received during circuit initialization.

All incoming URP GOS1 and GOS2 data is available immediately and all URP

GOS5 (block mode) data is available after the appropriate veriﬁcation and

processing. You can implement the timeout function using a combination of the

poll system call and the O_NODELAY open ﬂag.

DIOCXCTL

In previous releases, the only way an application could transmit an arbitrary

URP level-D code was to use the DIOCXCTL ioctl directive. The speciﬁed

level-D code would be transmitted at the end of the next data block, followed by

a possibly zero-length write to force the level-D code to be transmitted in an

URP data block.

This function has been replaced by the dkleveld library function. Refer to the

dkleveld example later in this chapter.