NIO CommKit Host Interface Installation and System Administration Manual

6-4

Porting CommKit Applications To Release 4.x

User-Level Compatibility

The CommKit software user-level commands contain the same functions as

in earlier releases. The major compatibility issues are the expanded features

of CommKit 4.x and their backward compatibility to CommKit 3.2. The

new STREAMS architecture in this release of the CommKit software also

raises compatibility issues. The features that affect the CommKit software

commands are:

• Symbolic links

• Long file names

• Job control

• STREAMS

The following sections describe the relationship of these features to the

commands.

The dk command implements remote execution and remote login between

the local and the remote host. If the local and remote hosts are running

different releases of HP-UX, the operation of the dk command might be

affected, because the dk command is designed to support only processes that

conform to the base UNIX System V deﬁnition. Processes that do not

conform to this deﬁnition, even though they are supported by HP-UX, may

behave poorly under a remote execution or remote login session.

The dk command is affected by different releases of HP-UX as shown

below:

• The remote execution and remote login commands do not use a STREAMS

interface on the remote host. Commands that depend on a STREAMS interface

may not work.

• Commands used as arguments to the dk command are not controlled by

the HP-UX job control mechanism. See sh(1) in the HP-UX Reference,

Volume 1 for more information on job control. On a local host with HP-UX, you

control dk through the job control mechanism, so that you can execute multiple

dk commands. Each time you execute dk, you use one data switch connection.